Method, device and system for regulating and controlling inhibition liquid injected into coal seam

Abstract

The invention provides a regulation and control method, device and system for coal seam injection inhibition liquid. The method comprises the steps of a first obtaining step, wherein at least one piece of sampling data of at least one to-be-injected area in a target coal seam is obtained; a first determination step: determining the initial liquid injection pressure of the first to-be-injected area at least according to the sampling data, so that an injection module injects liquid into the first to-be-injected area according to the initial liquid injection pressure; a second obtaining step: obtaining a first liquid injection flow of the injection module at a first moment; and regulating and controlling: regulating and controlling the liquid injection pressure of the injection module at a second moment according to the first liquid injection flow and the initial liquid injection pressure, and the second moment is a moment after the first moment. The problems of low liquid injection efficiency and low safety of a coal seam inhibition liquid injection technology in the prior art are at least solved.

Description

Technical Field

[0001] The present application relates to the technical field of coal seam protection, and in particular to a method for controlling the injection of a chemical retardant into a coal seam, a device for controlling the injection of a chemical retardant into a coal seam, and a control system for controlling the injection of a chemical retardant into a coal seam. Background Art

[0002] Coal seam injection technology is one of the main methods to prevent spontaneous combustion of coal in goaf. Among them, the equipment and method of coal seam injection directly affect the effect of inhibition. Efficient coal seam injection equipment and method can effectively improve the efficiency of coal seam inhibition, inhibit spontaneous combustion of coal in goaf, and reduce the occurrence of mine fire accidents.

[0003] Therefore, there is an urgent need for a method for regulating the injection of inhibitory liquid into coal seams to solve the above problems. Summary of the invention

[0004] The main purpose of the present application is to provide a control method for injecting chemical retarding liquid into a coal seam, a control device for injecting chemical retarding liquid into a coal seam, and a control system for injecting chemical retarding liquid into a coal seam, so as to at least solve the problems of low injection efficiency and low safety of the prior art technology for injecting chemical retarding liquid into coal seams.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a method for regulating the injection of inhibitory liquid into a coal seam is provided, comprising: a first acquisition step: acquiring at least one sampling data of at least one area to be injected in the target coal seam; a first determination step: determining the initial injection pressure of the first area to be injected at least based on the sampling data, so that the injection module injects liquid into the first area to be injected according to the initial injection pressure; a second acquisition step: acquiring a first injection flow rate of the injection module at a first moment; a regulation step: regulating the injection pressure of the injection module at a second moment according to the first injection flow rate and the initial injection pressure, the second moment being a moment after the first moment.

[0006] Optionally, the first acquisition step includes: controlling the sampling module to sample the target coal seam to obtain at least one sample data set of at least one sampling sample of at least one of the areas to be injected, wherein the sample data set includes multiple sample data; obtaining the sampling data based on at least one sample data set of at least one of the sampling samples, wherein the sampling data includes the average value of at least one sample data of the same type in at least one of the sample data sets.

[0007] Optionally, the first determination step includes: using a COMSOL numerical simulation method to process the sampled data to obtain the initial injection pressure.

[0008] Optionally, the control step includes: obtaining a first preset threshold value corresponding to the initial injection pressure; determining whether the first injection flow rate is greater than the first preset threshold value; and controlling the injection module to increase the injection pressure when the first injection flow rate is less than the first preset threshold value.

[0009] Optionally, the control method also includes: a judgment step: judging whether the first difference is less than a second preset threshold value, and obtaining a first judgment result, wherein the first difference is the difference between a second injection flow rate and the first injection flow rate, and the second injection flow rate is the injection flow rate of the injection module at the second moment; a first stop step: when the first judgment result is yes, sending a stop signal to stop the injection module from injecting; a first loop step: when the first judgment result is no, cyclically executing the first update step, the control step and the judgment step, until the first judgment result is yes and stopping, wherein the first update step includes: obtaining the second injection flow rate of the injection module at the second moment, and using the second injection flow rate as the updated first injection flow rate.

[0010] Optionally, the control method also includes: a third acquisition step: acquiring preset injection information of the first area to be injected and multiple edge information of the preset injection information, wherein the preset injection information includes preset distribution information of the catalytic liquid in the target coal seam after the injection module completes the injection of the first area to be injected; a detection step: controlling the detection module to detect whether the target coal seam corresponding to the target edge information has the catalytic liquid, and obtaining a first detection result; a second stop step: when the first detection result is yes, sending a stop signal to stop the detection by the detection module; a second loop step: when the first detection result is no, looping the detection step and the second update step until the first detection results are all yes and stopping, wherein the second update step includes: confirming the updated target edge information according to the target edge information and the preset injection information; obtaining actual injection information according to multiple target edge information, and the actual injection information includes the actual distribution information of the catalytic liquid in the target coal seam after the injection module completes the injection of the first area to be injected.

[0011] Optionally, the control method also includes: determining error information based on the actual injection information and the preset distribution information, wherein the actual injection information includes the actual position of the inhibitor liquid, the preset distribution information includes the preset position of the inhibitor liquid, and the error information includes the average error between the actual position and the preset position; determining second injection information based on the actual injection information and the error information, wherein the second injection information includes distribution information of a second area to be injected; determining an updated initial injection pressure based on the injection pressure and the injection flow rate, so that the injection module injects the updated first area to be injected according to the updated initial injection pressure, wherein the second area to be injected is the updated first area to be injected; repeating the second acquisition step, the control step, the judgment step and the first loop step until the first judgment result is yes and stopping.

[0012] Optionally, the updated initial injection pressure is determined based on the injection pressure and the injection flow rate, including: obtaining a curve of injection pressure-injection flow rate versus injection time based on the injection pressure and the injection flow rate; obtaining an updated initial injection pressure based on the curve of injection pressure-injection flow rate versus injection time, wherein the updated initial injection pressure is the injection pressure when injection stops in the curve of injection pressure-injection flow rate versus injection time.

[0013] According to another aspect of the present application, a control device for injecting inhibitory liquid into a coal seam is provided, comprising: a first acquisition unit, used to acquire at least one sampling data of at least one area to be injected in the target coal seam; a first determination unit, used to determine the initial injection pressure of the first area to be injected based on at least the sampling data, so that the injection module injects liquid into the first area to be injected based on the initial injection pressure; a second acquisition unit, used to acquire a first injection flow rate of the injection module at a first moment; and a control unit, used to control the injection pressure of the injection module at a second moment based on the first injection flow rate and the initial injection pressure, the second moment being a moment after the first moment.

[0014] According to another aspect of the present application, a control system for injecting chemical retarding liquid into a coal seam is provided, comprising: one or more processors, a memory, one or more programs, a scanning device, an injection system, and an ultrasonic detection device, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, the processor is connected to the scanning device to obtain at least one sampling data of at least one area to be injected in the target coal seam; the processor is connected to the injection system to inject liquid into the first area to be injected according to an initial injection pressure, the processor is connected to the ultrasonic detection device to obtain a first injection flow rate at a first moment, and the one or more programs include a control method for executing any one of the above-mentioned methods for injecting chemical retarding liquid into a coal seam.

[0015] The technical solution of the present application includes: obtaining at least one sampling data of at least one area to be injected in the target coal seam; determining the initial injection pressure of the first area to be injected at least based on the sampling data, so that the injection module injects the first area to be injected according to the initial injection pressure; obtaining the first injection flow rate of the injection module at the first moment; regulating the injection pressure of the injection module at the second moment according to the first injection flow rate and the initial injection pressure, the second moment being the moment after the first moment. In this method, the initial injection pressure of the first area to be injected is obtained according to the sampled sample in the coal seam, and the initial injection pressure that meets the conditions of the target coal seam can be obtained, which improves the safety of the injection of the inhibitor liquid, and the pressure is adjusted according to the coal sample to obtain the optimal injection pressure, and the injection is carried out at the optimal injection pressure to avoid fracturing the coal seam and improve the efficiency and safety of the injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 A hardware structure block diagram of a mobile terminal for executing a control method for injecting a retardant liquid into a coal seam provided in an embodiment of the present application is shown;

[0018] Figure 2 A schematic flow chart of a method for controlling the injection of a chemical inhibitor into a coal seam according to an embodiment of the present application is shown;

[0019] Figure 3 A schematic diagram of scanning a sampling sample provided according to an embodiment of the present application is shown;

[0020] Figure 4A schematic diagram showing the arrangement of an ultrasonic detection device provided according to an embodiment of the present application is shown;

[0021] Figure 5 A curve diagram showing the changes of the injection pressure-injection flow rate obtained after the first area to be injected is injected with liquid versus the injection time provided in an embodiment of the present application is shown;

[0022] Figure 6 A structural block diagram of a control device for injecting a chemical retardant liquid into a coal seam according to an embodiment of the present application is shown;

[0023] Figure 7 A schematic structural diagram of an injection system provided according to an embodiment of the present application is shown.

[0024] The above drawings include the following reference numerals:

[0025] 1. Liquid injection pressure control system; 2. Catalytic liquid feed box; 3. Motor; 4. Electric valve; 5. Flow meter; 6. Liquid injection pipe; 102. Processor; 104. Memory; 106. Transmission equipment; 108. Input and output equipment; 21. Coal sample; 22. CT scanner; 30. Coal seam; 31. Liquid injection hole; 32. Transducer. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] As introduced in the background technology, the technology of injecting inhibitory liquid into coal seams in the prior art has low injection efficiency and low safety. To solve the above problems, the embodiments of the present application provide a method for controlling the injection of inhibitory liquid into coal seams, a device for controlling the injection of inhibitory liquid into coal seams, and a control system for the injection of inhibitory liquid into coal seams.

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] The method embodiments provided in the embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 1 is a hardware structure block diagram of a mobile terminal for a method for controlling the injection of a retardant liquid into a coal seam according to an embodiment of the present invention. Figure 1 As shown, the mobile terminal may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input / output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the mobile terminal. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0032] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the control method of injecting retardant liquid into coal seams in the embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, the above method is realized. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories may be connected to the mobile terminal via a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The transmission device 106 is used to receive or send data via a network. The above-mentioned specific examples of the network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0033] In this embodiment, a method for controlling the injection of inhibitory liquid into coal seams that runs on a mobile terminal, a computer terminal or a similar computing device is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0034] Figure 2 1 is a flow chart of a method for controlling the injection of a retardant liquid into a coal seam according to an embodiment of the present application. Figure 2 As shown, the method comprises the following steps:

[0035] Step S201, a first acquisition step: acquiring at least one sampling data of at least one area to be injected in the target coal seam.

[0036] Specifically, samples are obtained in the area to be injected in the target coal seam, and sampling data is obtained based on the samples. That is, the sampling data is tailored based on the characteristics of the actual coal sample of the target coal seam. By using sampling data that conforms to the actual conditions of the target coal seam, an injection pressure that better conforms to the conditions of the target coal seam can be obtained, thereby improving the pertinence and effectiveness of the injection operation and increasing the safety of the injection.

[0037] Step S202, a first determination step: determining an initial injection pressure of the first area to be injected at least according to the sampling data, so that the injection module injects liquid into the first area to be injected according to the initial injection pressure.

[0038] Specifically, the initial injection pressure is based on the target coal seam, which presets the initial conditions for the penetration of the inhibitory liquid in the coal seam. The setting of this pressure value enables the inhibitory liquid to overcome the initial resistance of the coal seam when entering the coal seam and begin to penetrate into the coal seam. The initial injection pressure that meets the actual conditions of the target coal seam avoids excessive pressure directly acting on the coal seam, thereby reducing the risk of coal seam fracturing, achieving effective injection of the inhibitory liquid, and improving safety during the mining process. In addition, the initial injection pressure that meets the actual conditions of the target coal seam also helps to quickly reach the optimal permeability state of the coal seam, avoiding unnecessary pressure adjustments and waiting time, thereby improving the overall efficiency of the injection operation.

[0039] Step S203, a second acquisition step: acquiring a first injection flow rate of the injection module at a first moment.

[0040] Specifically, during the injection of the target coal seam retardant liquid, the ultrasonic detection equipment is used to dynamically monitor the retardant liquid's infiltration process, and the first injection flow rate of the retardant liquid injection can be monitored in real time, so that the diffusion efficiency of the retardant liquid in the coal seam can be understood in real time. The injection flow rate can be used to determine whether the retardant liquid is evenly diffused in the coal seam, ensuring the continuous and effective injection of the retardant liquid. In addition, according to the changes in the injection flow rate, the injection process can be optimized to ensure the retardant effect while improving operating efficiency and reducing unnecessary costs. At the same time, by monitoring the injection flow rate, it can be ensured that the retardant liquid enters the coal seam as planned, thereby achieving the expected retardant effect, preventing the spontaneous combustion of coal left in the goaf, and ensuring mine safety.

[0041] Step S204, a control step: according to the first injection flow rate and the initial injection pressure, the injection pressure of the injection module at the second moment is controlled, and the second moment is a moment after the first moment.

[0042] Specifically, the ultrasonic detection equipment dynamically monitors the infiltration process of the inhibitor liquid, and adjusts the injection pressure according to the monitoring results of the injection flow rate, which can ensure the uniform penetration of the inhibitor liquid in the coal seam, avoid the situation of local excessive injection or insufficient injection, and thus improve the efficiency of the overall operation. At the same time, the regulation of the injection flow rate is directly related to the diffusion range and depth of the inhibitor liquid, which is crucial to achieving the expected inhibitor effect. Intelligent regulation of injection pressure and injection flow can ensure that the inhibitor liquid fully covers the coal seam, achieves the purpose of suppressing the spontaneous combustion of coal in the goaf, and improves the safety of injecting inhibitor liquid into the coal seam. In addition, the intelligent regulation of the inhibitor liquid reduces the excessive and over-injection of the inhibitor liquid, reduces the operating cost, and also helps to find the injection rate that best suits the current coal seam conditions. Combined with the ultrasonic detection equipment and the monitoring means of the monitoring hole, the infiltration process of the inhibitor liquid is dynamically monitored to ensure that the inhibitor liquid fully exerts its inhibitory effect.

[0043] In this embodiment, the pressure is adjusted according to the coal sample conditions to obtain the optimal injection pressure, and injection is performed at the optimal injection pressure to avoid fracturing the coal seam and improve injection efficiency and safety.

[0044] In the specific implementation process, the above-mentioned first acquisition step includes: controlling the sampling module to sample the target coal seam to obtain at least one sample data set of at least one sampling sample of at least one area to be injected, and the sample data set includes multiple sample data; according to at least one sample data set of at least one sampling sample, sampling data is obtained, wherein the sampling data includes the average value of at least one sample data having the same type of data in at least one sample data set.

[0045] In this scheme, the coring machine is controlled to randomly take 1 to 5 sampling samples (coal samples) in the target coal seam, and further 3 to 5 coal samples are taken. The sampling samples are scanned by controlling the CT scanning equipment to obtain a sample data set of the sampling samples. The sample data set of the sampling samples includes multiple sample data, specifically including the open porosity, closed porosity, proportion of micropores, proportion of mesopores and proportion of macropores of the coal sample, and the average value of the open porosity, the average value of the closed porosity, the average value of the proportion of micropores, the average value of the proportion of mesopores and the average value of the proportion of macropores of multiple sample data sets are calculated. By adopting the average value of the sample data, the permeability of the coal seam and the flow path of the inhibitor liquid can be effectively confirmed, so that the initial injection pressure obtained is more scientific and more in line with the actual needs of the coal seam, and the most suitable injection pressure is found to ensure the uniform penetration of the inhibitor liquid, thereby improving the injection efficiency and effect of the inhibitor liquid.

[0046] Specifically, Figure 3As shown, during the scanning process of the coal sample 21 (sampling sample), the CT scanner 22 scans the coal sample 21 along a circular trajectory, and can accurately obtain the open porosity, closed porosity, proportion of micropores, proportion of mesopores and proportion of macropores of the coal sample 21. By taking the coal sample 21 and analyzing the structure, the grouting failure caused by the low open porosity of the coal sample 21 can be avoided, and the initial injection pressure is planned in advance according to the coal sample 21 for injection; the infiltration process and the range of the inhibitory liquid in the coal seam are predicted.

[0047] In some optional embodiments, the sampled samples are scanned by controlling a CT scanning device to obtain a sample data set of the sampled samples, including: reconstructing the scanned pore structure, and counting the open porosity, closed porosity, proportion of micropores, proportion of mesopores and proportion of macropores of each coal sample, and taking the average value of the open porosity, closed porosity, proportion of micropores, proportion of mesopores and proportion of macropores of all coal samples; wherein the pore size range of the micropores is φ<2nm, the pore size range of the mesopores is 2nm<φ<50nm, and the pore size range of the macropores is φ>50nm.

[0048] Among them, the information on pore structure including open porosity, closed porosity, proportion of micropores, proportion of mesopores and proportion of macropores helps to predict the diffusion range of the inhibitory liquid in the coal seam, ensuring that the inhibitory liquid can penetrate to a sufficient depth and breadth, thereby enhancing the inhibitory effect of the coal seam and effectively inhibiting the spontaneous combustion of coal left in the goaf.

[0049] In the specific implementation process, the first determination step includes: using the COMSOL numerical simulation method to process the sampling data to obtain the initial injection pressure.

[0050] In this scheme, the COMSOL numerical simulation method is used to simulate the infiltration process and range of the inhibitory liquid in the coal seam, and the initial injection pressure is formulated. COMSOL is a powerful multi-physics simulation software that can simulate the diffusion and penetration process of fluids in coal seams. Based on the pore structure characteristics obtained from the coal sample analysis (such as the average value of open porosity, closed porosity, micropore ratio, mesopore ratio and macropore ratio), COMSOL can establish a physical model of the coal seam, accurately predict the flow behavior of the inhibitory liquid in the coal seam, and formulate a suitable initial injection pressure to avoid the initial injection pressure being too high, resulting in coal seam rupture, and to prevent the initial injection pressure from being too low, resulting in insufficient penetration of the inhibitory liquid, ensuring that the injection process is both efficient and safe.

[0051] During the specific implementation process, the above-mentioned control steps include: obtaining a first preset threshold corresponding to the initial injection pressure; determining whether the first injection flow rate is greater than the first preset threshold; and controlling the injection module to increase the injection pressure when the first injection flow rate is less than the first preset threshold.

[0052] In this scheme, the injection pressure of the injection module is regulated by judging the size relationship between the first injection flow rate and the first preset threshold value (i.e., the pressure adjustment threshold value) obtained by the detection, which reflects the intelligent regulation capability of the injection system, that is, through the monitoring of the first preset threshold value and the automatic adjustment of the pressure, the system can automatically respond to the change of the permeability of the coal seam, reduce manual intervention, and improve the automation level of the operation. The permeability of the coal seam will change as the injection process proceeds. For example, the pores are gradually filled. By increasing the injection pressure after the flow rate drops and exceeds the preset threshold, the permeability is compensated, and the injection efficiency of the inhibitor can be maintained or improved. When the injection flow rate drops below the preset threshold, it indicates that the current pressure is insufficient to drive the inhibitor to continue to infiltrate the coal seam. Increasing the pressure helps to overcome the resistance of the coal seam and avoid interruption of injection due to insufficient pressure. In the target coal seam, the pore structure of the coal seam may be different at different locations. The monitoring of the injection flow rate and the adjustment of the injection pressure enable the injection process to dynamically adapt to the local changes of the coal seam and ensure the uniform distribution of the inhibitor.

[0053] Among them, the injection pressure increased by the coal seam inhibitory liquid injection system each time is in the range of 0.3Mpa to 0.8Mpa, which is not specifically limited in this application. For example, whenever the inhibitory liquid flow rate is lower than the pressure regulation threshold, that is, lower than 25% of the initial flow value, the coal seam inhibitory liquid injection system will increase the injection pressure by 0.5Mpa. The pressure regulation threshold and the step size of the pressure increase (0.5MPa) are set to avoid excessive pressure increase. Excessive pressure may cause damage to the coal seam structure, such as the formation of cracks, which will not only affect the injection effect, but also may bring safety risks. The coal seam inhibitory liquid injection system monitors the injection flow rate in real time, and adjusts the injection pressure in a step-by-step manner according to the flow rate, so as to determine the optimal injection pressure of the current coal seam, ensure the efficiency of subsequent injection, and at the same time avoid the failure of the inhibitory liquid injection work due to fracturing the coal seam, thereby improving safety.

[0054] In addition, by step-by-step pressurization, the optimal pressure range of the coal seam can be gradually explored to prevent fracturing of the coal seam. By adjusting the pressure in a timely manner, the continuity of the injection operation can be maintained, and the operation stagnation or restart caused by improper pressure can be avoided, thereby shortening the total operation time and improving the efficiency of the entire injection operation.

[0055] In some optional embodiments, the above-mentioned control method also includes: a judgment step: judging whether the first difference is less than a second preset threshold value, and obtaining a first judgment result, wherein the first difference is the difference between the second injection flow rate and the first injection flow rate; a first stop step: when the first judgment result is yes, sending a stop signal to stop the injection module from injecting; a first cycle step: when the first judgment result is no, cyclically executing the first update step, the control step and the judgment step until the first judgment result is yes and stopping, wherein the first update step includes: obtaining the second injection flow rate of the injection module at the second moment, and using the second injection flow rate as the updated first injection flow rate.

[0056] Specifically, during the injection process, the injection flow rate of the injection module is monitored in real time, and the injection flow rate is regulated by the relationship between the injection flow rate and the first preset threshold. When the difference between the injection flow rate at the current moment and the injection flow rate at the previous moment is less than the second preset threshold, it means that the retardant liquid in the coal seam has reached saturation or is close to saturation, and the injection of the coal seam should be stopped at this time; on the contrary, if the difference between the injection flow rate at the current moment and the injection flow rate at the previous moment is greater than or equal to the second preset threshold, it means that the injection of the retardant liquid in the coal seam has not been completed, and it is still necessary to continue the injection, detection and regulation until the retardant liquid in the coal seam reaches saturation or is close to saturation. The above-mentioned control method not only realizes the intelligent control capability of the injection system, but can also automatically adjust the pressure according to real-time flow feedback, realize fine control of the injection process, and ensure the efficiency of the injection operation. At the same time, it helps to prevent excessive injection and avoid continuing to pressurize the coal seam after it has reached the absorption limit of the inhibitor liquid. This can save inhibitor liquid, reduce operating costs, and avoid the risk of coal seam rupture caused by excessive pressure increase, ensuring that the injection operation is carried out within a safe range, protecting the integrity of the coal seam, and improving the safety level of operators and equipment.

[0057] Among them, the above-mentioned second preset threshold, that is, the stop boost threshold or the end threshold, is 4% to 9% of the initial injection flow value, wherein the initial injection flow is the injection flow of the injection module under the initial injection pressure, and the present application does not make specific limitations. Exemplarily, the second preset threshold is set to 5% of the initial injection flow. When the increase in the injection flow of the retardant liquid during pressurization is higher than 5% of the stop initial injection flow, the current injection pressure is maintained for injection. When the increase in the injection flow of the retardant liquid during pressurization is lower than 5% of the stop initial injection flow, the injection of the retardant liquid is stopped, and the first injection is completed. By setting the stop boost threshold, the risk of coal seam rupture caused by excessive pressure increase can be avoided, ensuring that the injection operation is carried out within a safe range. This not only protects the integrity of the coal seam, but also improves the safety level of operators and equipment.

[0058] In some optional embodiments, the above-mentioned control method also includes: a third acquisition step: acquiring preset injection information of the first area to be injected and multiple edge information of the preset injection information, wherein the preset injection information includes the preset distribution information of the catalytic liquid in the target coal seam after the injection module completes the injection of the first area to be injected; a detection step: controlling the detection module to detect whether there is catalytic liquid in the target coal seam corresponding to the target edge information, and obtaining a first detection result; a second stop step: when the first detection result is yes, a stop signal is sent to stop the detection module; a second loop step: when the first detection result is no, the detection step and the second update step are looped until the first detection results are all yes and stop, wherein the second update step includes: confirming the updated target edge information according to the target edge information and the preset injection information; obtaining actual injection information according to multiple target information, and the actual injection information includes the actual distribution information of the catalytic liquid in the target coal seam after the injection module completes the injection of the first area to be injected.

[0059] Specifically, the ultrasonic detection equipment is used to monitor the infiltration process of the inhibitory liquid in the coal seam, and can monitor the injection status of the first injection area. The accuracy of its data is directly related to the accuracy of the injection operation. Verifying the reliability of the ultrasonic detection results can ensure that the inhibitory range data provided by the ultrasonic detection is accurate, avoiding improper injection pressure or incorrect injection position due to data errors. At the same time, it can also avoid damage to the coal seam structure caused by the accuracy of the ultrasonic detection results.

[0060] Furthermore, the ultrasonic detection equipment is usually composed of an ultrasonic transmitter and a receiver, wherein the ultrasonic transmitter is a device for generating ultrasonic signals, and the ultrasonic receiver is a device for receiving ultrasonic signals reflected by an object. The ultrasonic transmitter and the receiver are usually transducers made of crystal or ceramic materials. The transducer is the core component of the ultrasonic transmitter and the receiver, which can convert electrical energy into ultrasonic energy and convert the received ultrasonic signal into electrical energy. Exemplarily, the ultrasonic detection equipment is arranged as follows: Figure 4 As shown, a plurality of transducers 32 are arranged around the injection hole 31 on the coal seam 30 so that the ultrasonic detection equipment can dynamically monitor the penetration process of the inhibitor liquid.

[0061] Specifically, an envelope diagram of the ultrasonic detection range of the inhibitory liquid is drawn through ultrasonic detection. The drawn envelope diagram is the inhibitory range detected by the ultrasonic detection equipment, and several monitoring holes are randomly drilled at the edge of the detected inhibitory range; if there is inhibitory liquid in all the monitoring holes, the detection range of the ultrasonic detection equipment is accurate, the error is 0, and the detection inhibitory range of the ultrasonic detection equipment is the actual inhibitory range; if there is no inhibitory liquid in all the monitoring holes, it means that the ultrasonic detection equipment may have errors due to interference from materials in the coal seam and other reasons; re-drill the monitoring holes and move the monitoring holes toward the injection holes. , until all the monitoring holes in the batch have inhibitory liquid, the actual inhibitory range is obtained, and the actual inhibitory range is compared with the inhibitory range detected by the ultrasonic detection equipment, and the error average value of the ultrasonic detection equipment is calculated; if only some of the monitoring holes have no inhibitory liquid, it means that the corresponding ultrasonic detection equipment may have problems; it is necessary to drill and monitor the monitoring holes without inhibitory liquid in the direction close to the injection hole until the new monitoring holes have inhibitory liquid, and the actual inhibitory range is obtained, and the ultrasonic detection equipment that may have problems is replaced, so as to re-verify and determine the error average value of the ultrasonic detection equipment when the next injection hole is injected.

[0062] During the process of re-drilling the monitoring holes for re-verification, if some of the monitoring holes still have no inhibitory liquid, it means that there is a problem with the non-ultrasonic detection equipment. Re-drill the monitoring holes and move them toward the injection holes until all the monitoring holes in the batch contain inhibitory liquid. The actual inhibitory range is obtained, and the actual inhibitory range is compared with the detected inhibitory range to calculate the average error of the ultrasonic detection equipment.

[0063] In some optional embodiments, the above-mentioned control method also includes: determining error information based on actual injection information and preset distribution information, wherein the actual injection information includes the actual position of the inhibitor liquid, the preset distribution information includes the preset position of the inhibitor liquid, and the error information includes the average error between the actual position and the preset position; determining second injection information based on the actual injection information and the error information, wherein the second injection information includes distribution information of the second area to be injected; determining an updated initial injection pressure based on the injection pressure and the injection flow rate, so that the injection module injects the updated first area to be injected according to the updated initial injection pressure, wherein the second area to be injected is the updated first area to be injected; repeating the second acquisition step, the control step, the judgment step and the first loop step until the first judgment result is yes and stopping.

[0064] Specifically, in the prior art, the process of determining the second area to be injected needs to determine whether there is a catalytic converter in the initial monitoring hole. If there is a catalytic converter, it is also necessary to confirm the detection holes in other areas, which increases the number of detection holes to be detected and reduces the injection efficiency. In addition, since there may be an injection area between the catalytic converter injection range of the first area to be injected and the catalytic converter injection range of the second area to be injected, there are hidden dangers to the safety of the target coal seam. In the process of confirming the second area to be injected, the position of the next injection hole is determined by preset injection information and actual injection information, and construction is performed directly according to the predicted position of the next injection hole. This can reduce the number of monitoring holes, increase the accuracy of determining the position of the second area to be tested, simplify the confirmation process of the second area to be injected, and improve the efficiency of catalytic converter injection in the coal seam.

[0065] In the specific implementation process, an updated initial injection pressure is determined according to the injection pressure and the injection flow rate, including: obtaining a curve of injection pressure-injection flow rate changing with injection time according to the injection pressure and the injection flow rate; obtaining an updated initial injection pressure according to the curve of injection pressure-injection flow rate changing with injection time, wherein the updated initial injection pressure is the injection pressure when the injection stops in the curve of injection pressure-injection flow rate changing with injection time.

[0066] In this scheme, the injection pressure and injection flow rate during the injection process of the first area to be injected confirm the injection pressure-injection flow rate versus injection time variation curve, and the initial injection pressure of the second area to be injected is obtained through the changes in the injection flow rate and the injection pressure during the injection process of the first area to be injected, thereby determining the optimal injection pressure of the current coal seam, ensuring the efficiency of subsequent injections, and avoiding the failure of the injection of the inhibitory liquid due to fracturing the coal seam, thereby improving safety; and, simplifying the process of determining the initial injection pressure of the second area to be injected, improving the injection efficiency of the inhibitory liquid in the coal seam, and, at the same time, obtaining a more accurate initial injection pressure for injecting the second area to be injected, thereby avoiding fracturing of the coal seam due to excessively high initial injection pressure during the injection process, thereby increasing safety, and avoiding unnecessary pressure adjustments and waiting time, and avoiding unnecessary waste of resources.

[0067] like Figure 5 As shown, Figure 5A curve diagram of the injection pressure-injection flow rate versus injection time obtained after injecting liquid into the first area to be injected is obtained. The first area to be injected is injected under the initial injection pressure. The injection flow rate is the largest at the beginning of the injection, and the injection flow rate gradually decreases as the injection proceeds. When the injection flow rate is lower than the first preset threshold (i.e., the pressure regulation threshold), the injection pressure is increased, and the injection flow rate also increases at this time, and the injection flow rate will still gradually decrease as the injection proceeds. The above steps are repeated until the increase in the inhibitory liquid flow rate is lower than the first preset threshold (i.e., the stop boost threshold) and the injection is completed. The injection pressure at the end of the injection is the optimal injection pressure, which is used as the initial injection pressure of the second area to be injected.

[0068] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the implementation process of the method for controlling the injection of inhibitory liquid into coal seams of the present application will be described in detail below in conjunction with specific embodiments.

[0069] This embodiment relates to a specific method for controlling the injection of a retardant liquid into a coal seam, comprising the following steps:

[0070] Step S1: Sampling: randomly taking 3 to 5 coal samples from the coal seam to be injected by a coring machine, and sending the coal samples to a CT scanning device on the well for scanning;

[0071] Step S2: coal sample analysis; reconstruct the scanned pore structure, and count the open porosity, closed porosity, proportion of micropores, proportion of mesopores and proportion of macropores of each coal sample, and take the average of the open porosity, closed porosity, proportion of micropores, proportion of mesopores and proportion of macropores of all coal samples; wherein the pore size range of micropores is φ<2nm, the pore size range of mesopores is 2nm<φ<50nm, and the pore size range of macropores is φ>50nm;

[0072] Step S3: Drafting the injection pressure; according to the average value calculated in step S2, the infiltration process and the retardation range of the retardant liquid in the coal seam are simulated by the COMSOL numerical simulation method, and the initial injection pressure is drafted;

[0073] Step S4: injecting liquid and testing the injection pressure; randomly selecting a point on the coal seam as the first injection hole, and arranging ultrasonic detection equipment in a dot matrix around the injection hole, injecting the inhibitor liquid into the injection hole through the coal seam inhibitor liquid injection system, and dynamically monitoring the penetration process of the inhibitor liquid through the ultrasonic detection equipment;

[0074] When injecting the inhibitory liquid, the inhibitory liquid is injected according to the initial injection pressure, and the initial flow value is obtained; whenever the inhibitory liquid flow is lower than the pressure adjustment threshold, that is, lower than 25% of the initial flow value, the coal seam inhibitory liquid injection system will increase the injection pressure by 0.5MPa; when the increase in the inhibitory liquid flow during pressurization is lower than the stop pressure increase threshold, that is, lower than 5% of the initial flow value, the current injection pressure is maintained for injection until the inhibitory liquid flow is lower than 5% of the initial flow value, then the inhibitory liquid injection is stopped, and the first injection is completed;

[0075] Step S5: fitting the pressure-injection volume curve to determine the optimal injection pressure;

[0076] Step S6: verify the reliability of the ultrasonic detection result; draw an envelope diagram of the ultrasonic detection range of the inhibitor liquid, the drawn envelope diagram is the inhibitor range detected by the ultrasonic detection equipment, and randomly drill a number of monitoring holes at the edge of the detected inhibitor range;

[0077] If there is inhibitory liquid in all monitoring holes, the detection range of the ultrasonic detection equipment is accurate, the error is 0, and the detection range of the inhibitory liquid by the ultrasonic detection equipment is the actual range of the inhibitory liquid;

[0078] If there is no inhibitory liquid in all monitoring holes, it means that the ultrasonic detection equipment may have errors due to interference from materials in the coal seam. Re-drill the monitoring holes and move them toward the injection holes until all monitoring holes in the batch have inhibitory liquid. The actual inhibitory range is obtained and compared with the inhibitory range detected by the ultrasonic detection equipment. The average error of the ultrasonic detection equipment is calculated.

[0079] If only some of the monitoring holes have no inhibitory liquid, it means that the corresponding ultrasonic detection equipment may have problems. The monitoring holes without inhibitory liquid need to be drilled again in the direction close to the injection hole for monitoring until inhibitory liquid is found in the new monitoring holes. The actual inhibitory range is obtained and the ultrasonic detection equipment with possible problems is replaced so that the next injection hole can be injected with liquid for re-verification and determination of the error average value of the ultrasonic detection equipment.

[0080] Step S7: determining the position of the second injection hole according to the actual resistance range and the error average value calculated in step S6;

[0081] Step S8: injecting the inhibitor liquid into the second injection hole according to the optimal injection pressure determined in step S5, and dynamically monitoring the penetration process of the inhibitor liquid by ultrasonic detection equipment until the flow rate of the inhibitor liquid is lower than the end threshold;

[0082] When re-verification is required, if there is still no inhibitory liquid in some monitoring holes, it means that there is a problem with the non-ultrasonic detection equipment; re-drill the monitoring holes and move them towards the injection hole until all the monitoring holes in the batch have inhibitory liquid, obtain the actual inhibitory range, and compare the actual inhibitory range with the detected inhibitory range, and calculate the average error of the ultrasonic detection equipment;

[0083] Step S9: draw an envelope diagram of the ultrasonic detection of the infiltration range of the inhibitor liquid, and combine the calculated error average value to predict the inhibitor range and the position of the next injection hole; randomly drill a number of verification holes at the edge of the predicted inhibitor range. If there is inhibitor liquid in all the verification holes, it proves that the predicted inhibitor range matches the actual inhibitor range, and the construction is directly carried out according to the predicted position of the next injection hole;

[0084] When the subsequent injection holes are injected, the number of monitoring holes can be reduced; if there is no inhibitory liquid in a monitoring hole, a monitoring hole is added within the predicted inhibitory range for monitoring to obtain the actual inhibitory range and re-determine the position of the next injection hole;

[0085] Step S10: Repeat the operation until the entire coal seam is injected with the inhibitory liquid.

[0086] In the above method, coal samples are taken and the structure of the coal samples is analyzed to avoid grouting failure caused by low open porosity of the coal samples, and the initial injection pressure is planned in advance according to the coal samples for injection; the infiltration process and the range of the inhibitory liquid in the coal seam are predicted, and the infiltration process of the inhibitory liquid is dynamically monitored in combination with ultrasonic detection equipment and monitoring hole monitoring methods to ensure that the inhibitory liquid fully exerts its inhibitory effect.

[0087] The embodiment of the present application also provides a control device for injecting a chemical retarding liquid into a coal seam. It should be noted that the control device for injecting a chemical retarding liquid into a coal seam in the embodiment of the present application can be used to execute the control method for injecting a chemical retarding liquid into a coal seam provided in the embodiment of the present application. The device is used to implement the above-mentioned embodiments and preferred implementation modes, and those that have been described will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware for a predetermined function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0088] The following is an introduction to the control device for injecting inhibitory liquid into a coal seam provided in an embodiment of the present application.

[0089] Figure 6 Schematic diagram of a control device for injecting a retardant liquid into a coal seam according to an embodiment of the present application. Figure 6 As shown, the device includes: a first acquisition unit 41, a first determination unit 42, a second acquisition unit 43 and a control unit 44.

[0090] The first acquisition unit 41 is used to acquire at least one sampling data of at least one area to be injected in the target coal seam.

[0091] The first determination unit 42 is used to determine the initial injection pressure of the first area to be injected at least according to the sampling data, so that the injection module injects liquid into the first area to be injected according to the initial injection pressure.

[0092] The second acquisition unit 42 is used to acquire a first injection flow rate of the injection module at a first moment.

[0093] The regulating unit 44 is used to regulate the injection pressure of the injection module at a second moment according to the first injection flow rate and the initial injection flow rate, where the second moment is a moment after the first moment.

[0094] In this embodiment, the first acquisition unit is used to acquire at least one sampling data of at least one area to be injected in the target coal seam; the first determination unit is used to determine the initial injection pressure of the first area to be injected based on at least the sampling data, so that the injection module injects liquid into the first area to be injected based on the initial injection pressure; the second acquisition unit is used to acquire the first injection flow rate of the injection module at the first moment; the control unit is used to control the injection pressure of the injection module at the second moment based on the first injection flow rate and the initial injection pressure, the second moment being the moment after the first moment, and the control unit adjusts the pressure according to the coal sample through the above-mentioned device, so as to obtain the optimal injection pressure, and inject liquid at the optimal injection pressure to avoid fracturing the coal seam and improve the injection efficiency and safety.

[0095] During the specific implementation process, the first acquisition unit includes a first acquisition subunit and a calculation unit, wherein the first acquisition subunit is used to control the sampling module to sample the target coal seam to obtain at least one sample data set of at least one sampling sample in at least one area to be injected, and the sample data set includes multiple sample data; the calculation unit is used to obtain sampling data based on at least one sample data set of at least one sampling sample, wherein the sampling data includes the average value of at least one sample data having the same type of data in at least one sample data set.

[0096] In this scheme, the coring machine is controlled to randomly take 1 to 5 sampling samples in the target coal seam, and further 3 to 5 coal samples are taken. The sampling samples are scanned by controlling the CT scanning equipment to obtain a sample data set of the sampling samples. The sample data set of the sampling samples includes multiple sample data, specifically including the open porosity, closed porosity, proportion of micropores, proportion of mesopores and proportion of macropores of the coal sample, and the average value of the open porosity, the average value of the closed porosity, the average value of the proportion of micropores, the average value of the proportion of mesopores and the average value of the proportion of macropores of multiple sample data sets are calculated. By adopting the average value of the sample data, the permeability of the coal seam and the flow path of the inhibitor liquid can be effectively confirmed, so that the initial injection pressure obtained is more scientific and more in line with the actual needs of the coal seam, and the most suitable injection pressure is found to ensure the uniform infiltration of the inhibitor liquid, thereby improving the injection efficiency and effect of the inhibitor liquid.

[0097] In a specific implementation process, the first determining unit includes a processing unit, and the processing unit is used to process the sampling data using a COMSOL numerical simulation method to obtain an initial injection pressure.

[0098] In this scheme, the COMSOL numerical simulation method is used to simulate the infiltration process and range of the inhibitory liquid in the coal seam, and the initial injection pressure is formulated. COMSOL is a powerful multi-physics simulation software that can simulate the diffusion and penetration process of fluids in coal seams. Based on the pore structure characteristics obtained from the coal sample analysis (such as the average value of open porosity, closed porosity, micropore ratio, mesopore ratio and macropore ratio), COMSOL can establish a physical model of the coal seam, accurately predict the flow behavior of the inhibitory liquid in the coal seam, and formulate a suitable initial injection pressure to avoid the initial injection pressure being too high, resulting in coal seam rupture, and to prevent the initial injection pressure from being too low, resulting in insufficient penetration of the inhibitory liquid, ensuring that the injection process is both efficient and safe.

[0099] During the specific implementation process, the regulation module includes a second acquisition subunit, a first judgment subunit and a first control subunit, wherein the second acquisition subunit is used to obtain a first preset threshold corresponding to the initial injection pressure; the first judgment subunit is used to judge whether the first injection flow rate is greater than the first preset threshold; the first control subunit is used to control the injection module to increase the injection pressure when the first injection flow rate is less than the first preset threshold.

[0100] In this scheme, the injection pressure of the injection module is regulated by judging the relationship between the first injection flow rate and the first preset threshold value, which reflects the intelligent regulation capability of the injection system, that is, through the monitoring of the flow threshold and the automatic adjustment of the pressure, the system can automatically respond to the change of the permeability of the coal seam, reduce manual intervention, and improve the automation level of the operation. The permeability of the coal seam will change with the progress of the injection process. For example, the pores are gradually filled. By increasing the injection pressure after the flow rate drops and exceeds the preset threshold, the permeability is compensated, and the injection efficiency of the inhibitor can be maintained or improved. When the injection flow rate drops below the preset threshold, it indicates that the current pressure is insufficient to drive the inhibitor to continue to infiltrate the coal seam. Increasing the pressure helps to overcome the resistance of the coal seam and avoid interruption of injection due to insufficient pressure. In the target coal seam, the pore structure of the coal seam may be different at different locations. The monitoring of the injection flow rate and the adjustment of the injection pressure enable the injection process to dynamically adapt to the local changes of the coal seam and ensure the uniform distribution of the inhibitor.

[0101] In some optional embodiments, the control device also includes a judgment unit, a first stop unit and a first circulation unit, wherein the judgment unit is used for a judgment step: judging whether the first difference is less than a second preset threshold value to obtain a first judgment result, wherein the first difference is the difference between the second injection flow rate and the first injection flow rate, and the second injection flow rate is the injection flow rate of the injection module at the second moment; the first stop unit is used to send a stop signal to stop the injection module from injecting when the first judgment result is yes; the first circulation unit is used for a first circulation step: when the first judgment result is no, cyclically executing the first update step, the control step and the judgment step until the first judgment result is yes and stopping, wherein the first update step includes: obtaining the second injection flow rate of the injection module at the second moment, and using the second injection flow rate as the updated first injection flow rate.

[0102] Specifically, during the injection process, the injection flow rate of the injection module is monitored in real time, and the injection flow rate is regulated by the relationship between the injection flow rate and the first preset threshold. When the difference between the injection flow rate at the current moment and the injection flow rate at the previous moment is less than the second preset threshold, it means that the retardant liquid in the coal seam has reached saturation or is close to saturation, and the injection of the coal seam should be stopped at this time; on the contrary, if the difference between the injection flow rate at the current moment and the injection flow rate at the previous moment is greater than or equal to the second preset threshold, it means that the injection of the retardant liquid in the coal seam has not been completed, and it is still necessary to continue the injection, detection and regulation until the retardant liquid in the coal seam reaches saturation or is close to saturation. The above-mentioned control method not only realizes the intelligent control capability of the injection system, but can also automatically adjust the pressure according to real-time flow feedback, realize fine control of the injection process, and ensure the efficiency of the injection operation. At the same time, it helps to prevent excessive injection and avoid continuing to pressurize the coal seam after it has reached the absorption limit of the inhibitor liquid. This can save inhibitor liquid, reduce operating costs, and avoid the risk of coal seam rupture caused by excessive pressure increase, ensuring that the injection operation is carried out within a safe range, protecting the integrity of the coal seam, and improving the safety level of operators and equipment.

[0103] In some optional embodiments, the control device also includes a third acquisition unit, a detection unit, a second stop unit, a second circulation unit and a first determination subunit, wherein the third acquisition unit is used to obtain preset injection information of the first area to be injected and multiple edge information of the preset injection information, wherein the preset injection information includes preset distribution information of the catalytic liquid in the target coal seam after the injection module completes the injection of the first area to be injected; the detection unit is used for the detection step: controlling the detection module to detect whether there is catalytic liquid in the target coal seam corresponding to the target edge information, and obtaining a first detection result; the second stop unit is used to, when the first detection result is yes, send a stop signal to stop the detection module; the second circulation unit is used for the second circulation step: when the first detection result is no, cyclically execute the detection step and the second update step until the first detection results are all yes and stop, wherein the second update step includes: confirming the updated target edge information according to the target edge information and the preset injection information; the first determination subunit is used to obtain actual injection information according to multiple target information, and the actual injection information includes the actual distribution information of the catalytic liquid in the target coal seam after the injection module completes the injection of the first area to be injected.

[0104] Specifically, the ultrasonic detection equipment is used to monitor the infiltration process of the inhibitory liquid in the coal seam, and can monitor the injection situation of the first area to be injected. The accuracy of its data is directly related to the accuracy of the injection operation. Verifying the reliability of the ultrasonic detection results can ensure that the inhibitory range data provided by the ultrasonic detection is accurate, avoiding improper injection pressure or injection position errors caused by data errors, and at the same time, it can also avoid damage to the coal seam structure caused by the accuracy of the ultrasonic detection results.

[0105] In some optional embodiments, the control device also includes a second confirmation unit, a third confirmation unit, a fourth confirmation unit and a repetition unit, wherein the second confirmation unit is used to determine error information based on actual injection information and preset distribution information, wherein the actual injection information includes the actual position of the inhibitor liquid, the preset distribution information includes the preset position of the inhibitor liquid, and the error information includes the average error between the actual position and the preset position; the third confirmation unit is used to determine second injection information based on the actual injection information and the error information, wherein the second injection information includes distribution information of the second area to be injected; the fourth confirmation unit is used to determine an updated initial injection pressure based on the injection pressure and the injection flow rate, so that the injection module injects the updated first area to be injected according to the updated initial injection pressure, wherein the second area to be injected is the updated first area to be injected; the repetition unit is used to repeatedly execute the second acquisition step, the control step, the judgment step and the first cycle step until the first judgment result is yes and stops.

[0106] Specifically, in the prior art, the process of determining the second area to be injected needs to determine whether there is a catalytic converter in the initial monitoring hole. If there is a catalytic converter, it is also necessary to confirm the detection holes in other areas, which increases the number of detection holes to be detected and reduces the injection efficiency. In addition, since there may be an injection area between the catalytic converter injection range of the first area to be injected and the catalytic converter injection range of the second area to be injected, there are hidden dangers to the safety of the target coal seam. In the process of confirming the second area to be injected, the position of the next injection hole is determined by preset injection information and actual injection information, and construction is performed directly according to the predicted position of the next injection hole. This can reduce the number of monitoring holes, increase the accuracy of determining the position of the second area to be tested, simplify the confirmation process of the second area to be injected, and improve the efficiency of catalytic converter injection in the coal seam.

[0107] During the specific implementation process, the fourth confirmation unit includes a second confirmation subunit of the first determination subunit, wherein the first determination subunit is used to obtain a curve of injection pressure-injection flow rate changing with injection time based on the injection pressure and the injection flow rate; the second confirmation subunit is used to obtain an updated initial injection pressure based on the curve of injection pressure-injection flow rate changing with injection time, wherein the updated initial injection pressure is the injection pressure corresponding to the injection pressure at which the slope of the curve of injection pressure-injection flow rate changing with injection time begins to decrease.

[0108] In this scheme, the injection pressure and injection flow rate during the injection process of the first area to be injected confirm the injection pressure-injection flow rate versus injection time variation curve, and the initial injection pressure of the second area to be injected is obtained through the changes in the injection flow rate and the injection pressure during the injection process of the first area to be injected, thereby determining the optimal injection pressure of the current coal seam, ensuring the efficiency of subsequent injections, and avoiding the failure of the injection of the inhibitory liquid due to fracturing the coal seam, thereby improving safety; and, simplifying the process of determining the initial injection pressure of the second area to be injected, improving the injection efficiency of the inhibitory liquid in the coal seam, and, at the same time, obtaining a more accurate initial injection pressure for injecting the second area to be injected, thereby avoiding fracturing of the coal seam due to excessively high initial injection pressure during the injection process, thereby increasing safety, and avoiding unnecessary pressure adjustments and waiting time, and avoiding unnecessary waste of resources.

[0109] An embodiment of the present invention provides a control system for injecting chemical retarding liquid into a coal seam, comprising: one or more processors, a memory, one or more programs, a scanning device, an injection system, and an ultrasonic detection device, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, the processor is connected to the scanning device to obtain at least one sampling data of at least one area to be injected in the target coal seam; the processor is connected to the injection system to inject liquid into the first area to be injected according to the initial injection pressure, the processor is connected to the ultrasonic detection device to obtain a first injection flow rate at a first moment, and the one or more programs include a method for executing any one of the control methods for injecting chemical retarding liquid into a coal seam.

[0110] Specifically, the scanning equipment includes a CT scanning equipment to obtain at least one sampling data of at least one area to be injected in the target coal seam; the ultrasonic detection equipment can obtain dynamic monitoring of the infiltration process of the inhibitor liquid, and the ultrasonic detection equipment can obtain the preset injection information of the first area to be injected. Figure 7As shown, the injection system includes an injection pressure control system 1 and a motor 3. The feed end of the motor 3 is connected to a catalytic liquid feed box 2, and the discharge end of the motor 3 is connected to an injection pipe 6. An electric valve 4 and a flow meter 5 are sequentially arranged on the injection pipe 6 along the injection direction. The pressure regulating end of the motor 3 is connected to the pressure regulating output end of the injection pressure control system 1, the flow signal output end of the flow meter 5 is connected to the flow signal input end of the injection pressure control system 1, and the drive input end of the electric valve 4 is connected to the valve drive output end of the injection pressure control system 1.

[0111] After the above system is put into operation, the coal seam injection system can monitor the injection flow in real time, and adjust the injection pressure in a step-by-step manner according to the flow rate, so as to determine the optimal injection pressure of the current coal seam and ensure the efficiency of subsequent injection. At the same time, it can avoid the failure of injection of the chemical due to fracturing of the coal seam and improve safety.

[0112] Among them, the control method of injecting inhibitory liquid into coal seam includes:

[0113] Step S201, a first acquisition step: acquiring at least one sampling data of at least one area to be injected in the target coal seam.

[0114] Specifically, samples are obtained in the area to be injected in the target coal seam, and sampling data is obtained based on the samples. That is, the sampling data is tailored based on the characteristics of the actual coal sample of the target coal seam. By using sampling data that conforms to the actual conditions of the target coal seam, an injection pressure that better conforms to the conditions of the target coal seam can be formulated, thereby improving the pertinence and effectiveness of the injection operation and increasing the safety of the injection.

[0115] Step S202, a first determination step: determining an initial injection pressure of the first area to be injected at least according to the sampling data, so that the injection module injects liquid into the first area to be injected according to the initial injection pressure.

[0116] Specifically, the initial injection pressure is based on the target coal seam, which presets the initial conditions for the penetration of the inhibitory liquid in the coal seam. The setting of this pressure value enables the inhibitory liquid to overcome the initial resistance of the coal seam when entering the coal seam and begin to penetrate into the coal seam. The initial injection pressure that meets the actual conditions of the target coal seam avoids excessive pressure directly acting on the coal seam, thereby reducing the risk of coal seam fracturing, achieving effective injection of the inhibitory liquid, and improving safety during the mining process. In addition, the initial injection pressure that meets the actual conditions of the target coal seam also helps to quickly reach the optimal permeability state of the coal seam, avoiding unnecessary pressure adjustments and waiting time, thereby improving the overall efficiency of the injection operation.

[0117] Step S203, a second acquisition step: acquiring a first injection flow rate of the injection module at a first moment.

[0118] Specifically, during the injection of the target coal seam retardant liquid, the ultrasonic detection equipment is used to dynamically monitor the retardant liquid's infiltration process, and the first injection flow rate of the retardant liquid injection can be monitored in real time, so that the diffusion efficiency of the retardant liquid in the coal seam can be understood in real time. The injection flow rate can be used to determine whether the retardant liquid is evenly diffused in the coal seam, ensuring the continuous and effective injection of the retardant liquid. In addition, according to the changes in the injection flow rate, the injection process can be optimized to ensure the retardant effect while improving operating efficiency and reducing unnecessary costs. At the same time, by monitoring the injection flow rate, it can be ensured that the retardant liquid enters the coal seam as planned, thereby achieving the expected retardant effect, preventing the spontaneous combustion of coal left in the goaf, and ensuring mine safety.

[0119] Step S204, a control step: according to the first injection flow rate and the initial injection pressure, the injection pressure of the injection module at the second moment is controlled, and the second moment is a moment after the first moment.

[0120] Specifically, the ultrasonic detection equipment dynamically monitors the infiltration process of the inhibitor liquid, and adjusts the injection pressure according to the monitoring results of the injection flow rate, which can ensure the uniform penetration of the inhibitor liquid in the coal seam, avoid local excessive injection or insufficient injection, and thus improve the overall operation efficiency. At the same time, the regulation of the injection flow rate is directly related to the diffusion range and depth of the inhibitor liquid, which is crucial to achieving the expected inhibitor effect. Intelligent regulation of the injection pressure and injection flow rate can ensure that the inhibitor liquid fully covers the coal seam, achieves the purpose of suppressing the spontaneous combustion of coal in the goaf, and improves the safety of injecting inhibitor liquid into the coal seam. In addition, the intelligent regulation of the inhibitor liquid reduces the excessive and over-injection of the inhibitor liquid, reduces the operating cost, and also helps to find the injection rate that best suits the current coal seam conditions to ensure the efficient use of the inhibitor liquid.

[0121] Optionally, the first acquisition step includes: controlling the sampling module to sample the target coal seam to obtain at least one sample data set of at least one sampling sample in at least one area to be injected, the sample data set including multiple sample data; obtaining sampling data based on at least one sample data set of at least one sampling sample, wherein the sampling data includes the average value of at least one sample data having the same type of data in at least one sample data set.

[0122] Optionally, the first determination step includes: processing the sampling data using a COMSOL numerical simulation method to obtain an initial injection pressure.

[0123] Optionally, the control step includes: obtaining a first preset threshold value corresponding to the initial injection pressure; determining whether the first injection flow rate is greater than the first preset threshold value; and controlling the injection module to increase the injection pressure when the first injection flow rate is less than the first preset threshold value.

[0124] Optionally, the control method also includes: a judgment step: judging whether the first difference is less than a second preset threshold value, and obtaining a first judgment result, wherein the first difference is the difference between the second injection flow rate and the first injection flow rate, and the second injection flow rate is the injection flow rate of the injection module at the second moment; a first stop step: when the first judgment result is yes, sending a stop signal to stop the injection module from injecting; a first loop step: when the first judgment result is no, cyclically executing the first update step, the control step and the judgment step until the first judgment result is yes and stopping, wherein the first update step includes: obtaining the second injection flow rate of the injection module at the second moment, and using the second injection flow rate as the updated first injection flow rate.

[0125] Optionally, the control method also includes: a third acquisition step: acquiring preset injection information of the first area to be injected and multiple edge information of the preset injection information, wherein the preset injection information includes the preset distribution information of the catalytic liquid in the target coal seam after the injection module completes the injection of the first area to be injected; a detection step: controlling the detection module to detect whether there is catalytic liquid in the target coal seam corresponding to the target edge information, and obtaining a first detection result; a second stop step: when the first detection result is yes, sending a stop signal to stop the detection module; a second loop step: when the first detection result is no, looping the detection step and the second update step until the first detection results are all yes and stopping, wherein the second update step includes: confirming the updated target edge information according to the target edge information and the preset injection information; obtaining actual injection information according to multiple target edge information, and the actual injection information includes the actual distribution information of the catalytic liquid in the target coal seam after the injection module completes the injection of the first area to be injected.

[0126] Optionally, the control method also includes: determining error information based on actual injection information and preset distribution information, wherein the actual injection information includes the actual position of the inhibitor liquid, the preset distribution information includes the preset position of the inhibitor liquid, and the error information includes the average error between the actual position and the preset position; determining second injection information based on the actual injection information and the error information, wherein the second injection information includes distribution information of the second area to be injected; determining an updated initial injection pressure based on the injection pressure and the injection flow rate, so that the injection module injects the updated first area to be injected according to the updated initial injection pressure, wherein the second area to be injected is the updated first area to be injected; repeating the second acquisition step, the control step, the judgment step and the first loop step until the first judgment result is yes and stopping.

[0127] Optionally, an updated initial injection pressure is determined based on the injection pressure and the injection flow rate, including: obtaining a curve of injection pressure-injection flow rate versus injection time based on the injection pressure and the injection flow rate; obtaining an updated initial injection pressure based on the curve of injection pressure-injection flow rate versus injection time, wherein the updated initial injection pressure is the injection pressure when the injection stops in the curve of injection pressure-injection flow rate versus injection time.

[0128] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0129] An embodiment of the present invention provides a computer-readable storage medium, which includes a stored program, wherein when the program is run, a device where the computer-readable storage medium is located is controlled to execute a method for controlling the injection of a chemical retardant liquid into a coal seam.

[0130] Specifically, the control method of injecting the inhibitory liquid into the coal seam includes:

[0131] Step S201, a first acquisition step: acquiring at least one sampling data of at least one area to be injected in the target coal seam.

[0132] Specifically, samples are obtained in the area to be injected in the target coal seam, and sampling data is obtained based on the samples. That is, the sampling data is tailored based on the characteristics of the actual coal sample of the target coal seam. By using sampling data that conforms to the actual conditions of the target coal seam, an injection pressure that better conforms to the conditions of the target coal seam can be formulated, thereby improving the pertinence and effectiveness of the injection operation and increasing the safety of the injection.

[0133] Step S202, a first determination step: determining an initial injection pressure of the first area to be injected at least according to the sampling data, so that the injection module injects liquid into the first area to be injected according to the initial injection pressure.

[0134] Specifically, the initial injection pressure is based on the target coal seam, which presets the initial conditions for the penetration of the inhibitory liquid in the coal seam. The setting of this pressure value enables the inhibitory liquid to overcome the initial resistance of the coal seam when entering the coal seam and begin to penetrate into the coal seam. The initial injection pressure that meets the actual conditions of the target coal seam avoids excessive pressure directly acting on the coal seam, thereby reducing the risk of coal seam fracturing, achieving effective injection of the inhibitory liquid, and improving safety during the mining process. In addition, the initial injection pressure that meets the actual conditions of the target coal seam also helps to quickly reach the optimal permeability state of the coal seam, avoiding unnecessary pressure adjustments and waiting time, thereby improving the overall efficiency of the injection operation.

[0135] Step S203, a second acquisition step: acquiring a first injection flow rate of the injection module at a first moment.

[0136] Specifically, during the injection of the target coal seam retardant liquid, the ultrasonic detection equipment is used to dynamically monitor the retardant liquid's infiltration process, and the first injection flow rate of the retardant liquid injection can be monitored in real time, so that the diffusion efficiency of the retardant liquid in the coal seam can be understood in real time. The injection flow rate can be used to determine whether the retardant liquid is evenly diffused in the coal seam, ensuring the continuous and effective injection of the retardant liquid. In addition, according to the changes in the injection flow rate, the injection process can be optimized to ensure the retardant effect while improving operating efficiency and reducing unnecessary costs. At the same time, by monitoring the injection flow rate, it can be ensured that the retardant liquid enters the coal seam as planned, thereby achieving the expected retardant effect, preventing the spontaneous combustion of coal left in the goaf, and ensuring mine safety.

[0137] Step S204, a control step: according to the first injection flow rate and the initial injection pressure, the injection pressure of the injection module at the second moment is controlled, and the second moment is a moment after the first moment.

[0138] Specifically, the ultrasonic detection equipment dynamically monitors the infiltration process of the inhibitor liquid, and adjusts the injection pressure according to the monitoring results of the injection flow rate, which can ensure the uniform penetration of the inhibitor liquid in the coal seam, avoid local excessive injection or insufficient injection, and thus improve the overall operation efficiency. At the same time, the regulation of the injection flow rate is directly related to the diffusion range and depth of the inhibitor liquid, which is crucial to achieving the expected inhibitor effect. Intelligent regulation of the injection pressure and injection flow rate can ensure that the inhibitor liquid fully covers the coal seam, achieves the purpose of suppressing the spontaneous combustion of coal in the goaf, and improves the safety of injecting inhibitor liquid into the coal seam. In addition, the intelligent regulation of the inhibitor liquid reduces the excessive and over-injection of the inhibitor liquid, reduces the operating cost, and also helps to find the injection rate that best suits the current coal seam conditions to ensure the efficient use of the inhibitor liquid.

[0139] Optionally, the first acquisition step includes: controlling the sampling module to sample the target coal seam to obtain at least one sample data set of at least one sampling sample in at least one area to be injected, the sample data set including multiple sample data; obtaining sampling data based on at least one sample data set of at least one sampling sample, wherein the sampling data includes the average value of at least one sample data having the same type of data in at least one sample data set.

[0140] Optionally, the first determination step includes: processing the sampling data using a COMSOL numerical simulation method to obtain an initial injection pressure.

[0141] Optionally, the control step includes: obtaining a first preset threshold value corresponding to the initial injection pressure; determining whether the first injection flow rate is greater than the first preset threshold value; and controlling the injection module to increase the injection pressure when the first injection flow rate is less than the first preset threshold value.

[0142] Optionally, the control method also includes: a judgment step: judging whether the first difference is less than a second preset threshold value, and obtaining a first judgment result, wherein the first difference is the difference between the second injection flow rate and the first injection flow rate, and the second injection flow rate is the injection flow rate of the injection module at the second moment; a first stop step: when the first judgment result is yes, sending a stop signal to stop the injection module from injecting; a first loop step: when the first judgment result is no, cyclically executing the first update step, the control step and the judgment step until the first judgment result is yes and stopping, wherein the first update step includes: obtaining the second injection flow rate of the injection module at the second moment, and using the second injection flow rate as the updated first injection flow rate.

[0143] Optionally, the control method also includes: a third acquisition step: acquiring preset injection information of the first area to be injected and multiple edge information of the preset injection information, wherein the preset injection information includes the preset distribution information of the catalytic liquid in the target coal seam after the injection module completes the injection of the first area to be injected; a detection step: controlling the detection module to detect whether there is catalytic liquid in the target coal seam corresponding to the target edge information, and obtaining a first detection result; when the first detection result is yes, sending a stop signal to stop the detection module; a second loop step: a second stop step: when the first detection result is no, looping the detection step and the second update step until the first detection results are all yes and stopping, wherein the second update step includes: confirming the updated target edge information according to the target edge information and the preset injection information; obtaining actual injection information according to multiple target edge information, the actual injection information includes the actual distribution information of the catalytic liquid in the target coal seam after the injection module completes the injection of the first area to be injected.

[0144] Optionally, the control method also includes: determining error information based on actual injection information and preset distribution information, wherein the actual injection information includes the actual position of the inhibitor liquid, the preset distribution information includes the preset position of the inhibitor liquid, and the error information includes the average error between the actual position and the preset position; determining second injection information based on the actual injection information and the error information, wherein the second injection information includes distribution information of the second area to be injected; determining an updated initial injection pressure based on the injection pressure and the injection flow rate, so that the injection module injects the updated first area to be injected according to the updated initial injection pressure, wherein the second area to be injected is the updated first area to be injected; repeating the second acquisition step, the control step, the judgment step and the first loop step until the first judgment result is yes and stopping.

[0145] Optionally, an updated initial injection pressure is determined based on the injection pressure and the injection flow rate, including: obtaining a curve of injection pressure-injection flow rate versus injection time based on the injection pressure and the injection flow rate; obtaining an updated initial injection pressure based on the curve of injection pressure-injection flow rate versus injection time, wherein the updated initial injection pressure is the injection pressure when the injection stops in the curve of injection pressure-injection flow rate versus injection time.

[0146] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing a program for initializing at least the following method steps:

[0147] Optionally, the first acquisition step includes: controlling the sampling module to sample the target coal seam to obtain at least one sample data set of at least one sampling sample in at least one area to be injected, the sample data set including multiple sample data; obtaining sampling data based on at least one sample data set of at least one sampling sample, wherein the sampling data includes the average value of at least one sample data having the same type of data in at least one sample data set.

[0148] Optionally, the first determination step includes: processing the sampling data using a COMSOL numerical simulation method to obtain an initial injection pressure.

[0149] Optionally, the control step includes: obtaining a first preset threshold value corresponding to the initial injection pressure; determining whether the first injection flow rate is greater than the first preset threshold value; and controlling the injection module to increase the injection pressure when the first injection flow rate is less than the first preset threshold value.

[0150] Optionally, the control method also includes: a judgment step: judging whether the first difference is less than a second preset threshold value, and obtaining a first judgment result, wherein the first difference is the difference between the second injection flow rate and the first injection flow rate, and the second injection flow rate is the injection flow rate of the injection module at the second moment; a first stop step: when the first judgment result is yes, sending a stop signal to stop the injection module from injecting; a first loop step: when the first judgment result is no, cyclically executing the first update step, the control step and the judgment step until the first judgment result is yes and stopping, wherein the first update step includes: obtaining the second injection flow rate of the injection module at the second moment, and using the second injection flow rate as the updated first injection flow rate.

[0151] Optionally, the control method also includes: a third acquisition step: acquiring preset injection information of the first area to be injected and multiple edge information of the preset injection information, wherein the preset injection information includes the preset distribution information of the catalytic liquid in the target coal seam after the injection module completes the injection of the first area to be injected; a detection step: controlling the detection module to detect whether there is catalytic liquid in the target coal seam corresponding to the target edge information, and obtaining a first detection result; a second stop step: when the first detection result is yes, sending a stop signal to stop the detection module; a second loop step: when the first detection result is no, looping the detection step and the second update step until the first detection results are all yes and stopping, wherein the second update step includes: confirming the updated target edge information according to the target edge information and the preset injection information; obtaining actual injection information according to multiple target edge information, and the actual injection information includes the actual distribution information of the catalytic liquid in the target coal seam after the injection module completes the injection of the first area to be injected.

[0152] Optionally, the control method also includes: determining error information based on actual injection information and preset distribution information, wherein the actual injection information includes the actual position of the inhibitor liquid, the preset distribution information includes the preset position of the inhibitor liquid, and the error information includes the average error between the actual position and the preset position; determining second injection information based on the actual injection information and the error information, wherein the second injection information includes distribution information of the second area to be injected; determining an updated initial injection pressure based on the injection pressure and the injection flow rate, so that the injection module injects the updated first area to be injected according to the updated initial injection pressure, wherein the second area to be injected is the updated first area to be injected; repeating the second acquisition step, the control step, the judgment step and the first loop step until the first judgment result is yes and stopping.

[0153] Optionally, an updated initial injection pressure is determined based on the injection pressure and the injection flow rate, including: obtaining a curve of injection pressure-injection flow rate versus injection time based on the injection pressure and the injection flow rate; obtaining an updated initial injection pressure based on the curve of injection pressure-injection flow rate versus injection time, wherein the updated initial injection pressure is the injection pressure when the injection stops in the curve of injection pressure-injection flow rate versus injection time.

[0154] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order than here, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0155] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0156] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0157] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0158] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0159] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0160] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0161] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0162] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0163] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0164] 1) The control method of injecting chemical inhibitor into coal seam of the present application includes: obtaining at least one sampling data of at least one area to be injected in the target coal seam; determining the initial injection pressure of the first area to be injected at least based on the sampling data, so that the injection module injects the first area to be injected according to the initial injection pressure; obtaining the first injection flow rate of the injection module at the first moment; regulating the injection pressure of the injection module at the second moment according to the first injection flow rate and the initial injection pressure, the second moment being the moment after the first moment. In this method, the initial injection pressure of the first area to be injected is obtained according to the sampled sample in the coal seam, and the initial injection pressure that meets the conditions of the target coal seam can be obtained, which improves the safety of chemical inhibitor injection, and the pressure is adjusted according to the coal sample to obtain the optimal injection pressure, and the injection is carried out at the optimal injection pressure to avoid fracturing the coal seam and improve the efficiency and safety of injection.

[0165] 2) In the control device for injecting inhibitory liquid into coal seams of the present application, the first acquisition unit is used to acquire at least one sampling data of at least one area to be injected in the target coal seam; the first determination unit is used to determine the initial injection pressure of the first area to be injected based on at least the sampling data, so that the injection module injects liquid into the first area to be injected based on the initial injection pressure; the second acquisition unit is used to acquire the first injection flow rate of the injection module at the first moment; the control unit is used to control the injection pressure of the injection module at the second moment based on the first injection flow rate and the initial injection pressure, the second moment being the moment after the first moment, and the control unit adjusts the pressure according to the coal sample through the above-mentioned device to obtain the optimal injection pressure, and injects liquid at the optimal injection pressure to avoid fracturing the coal seam and improve the injection efficiency and safety.

[0166] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for controlling the injection of a retardant liquid into a coal seam, characterized in that: include: The first acquisition step: acquiring at least one sampling data of at least one area to be injected in the target coal seam; A first determination step: determining an initial injection pressure of a first area to be injected at least according to the sampling data, so that an injection module injects liquid into the first area to be injected according to the initial injection pressure; The second acquisition step: acquiring a first injection flow rate of the injection module at a first moment; Control step: According to the first injection flow rate and the initial injection pressure, control the injection pressure of the injection module at a second moment, the second moment being a moment after the first moment.

2. The control method according to claim 1, characterized in that: The first acquisition step comprises: Controlling a sampling module to sample the target coal seam to obtain at least one sample data set of at least one sampled sample of at least one area to be injected, wherein the sample data set includes a plurality of sample data; The sampling data is obtained according to at least one of the sample data sets of at least one of the sampled samples, wherein the sampling data includes an average value of at least one of the sample data having the same type of data in at least one of the sample data sets.

3. The control method according to claim 1, characterized in that: The first determination step includes: using a COMSOL numerical simulation method to process the sampled data to obtain the initial injection pressure.

4. The control method according to claim 1, characterized in that: The control step comprises: Acquire a first preset threshold value corresponding to the initial injection pressure; Determining whether the first injection flow rate is greater than the first preset threshold; When the first injection flow rate is less than the first preset threshold, the injection module is controlled to increase the injection pressure.

5. The control method according to claim 4, characterized in that: Also includes: Determining step: determining whether the first difference is less than a second preset threshold value, and obtaining a first determination result, wherein the first difference is the difference between a second injection flow rate and the first injection flow rate, and the second injection flow rate is the injection flow rate of the injection module at the second moment; The first stopping step: when the first judgment result is yes, sending a stop signal to stop the injection module from injecting liquid; The first loop step: when the first judgment result is no, the first update step, the control step and the judgment step are executed in a loop until the first judgment result is yes and then stop, wherein the first update step includes: obtaining the second injection flow rate of the injection module at the second moment, and using the second injection flow rate as the updated first injection flow rate.

6. The control method according to claim 5, characterized in that: Also includes: The third acquisition step: acquiring preset injection information of the first area to be injected and multiple edge information of the preset injection information, wherein the preset injection information includes preset distribution information of the inhibitory liquid in the target coal seam after the injection module completes the injection of the first area to be injected; Detection step: controlling the detection module to detect whether the target coal seam corresponding to the target edge information has the retardant liquid, and obtaining a first detection result; A second stopping step: when the first detection result is yes, sending a stop signal to stop the detection module; A second loop step: when the first detection result is no, looping the detection step and the second update step until the first detection result is both yes, and then stopping, wherein the second update step includes: confirming the updated target edge information according to the target edge information and the preset injection information; The actual injection information is obtained according to the plurality of target edge information, wherein the actual injection information includes the actual distribution information of the inhibitory liquid in the target coal seam after the injection module completes the injection of the first to-be-injected area.

7. The control method according to claim 6, characterized in that: Also includes: Determine error information according to the actual injection information and the preset distribution information, wherein the actual injection information includes the actual position of the inhibitor liquid, the preset distribution information includes the preset position of the inhibitor liquid, and the error information includes an average error between the actual position and the preset position; Determine second injection information according to the actual injection information and the error information, wherein the second injection information includes distribution information of a second area to be injected; Determining the updated initial injection pressure according to the injection pressure and the injection flow rate, so that the injection module injects the updated first area to be injected according to the updated initial injection pressure, wherein the second area to be injected is the updated first area to be injected; The second acquisition step, the regulating step, the judging step and the first loop step are repeatedly performed until the first judging result is yes and then the process stops.

8. The control method according to claim 7, characterized in that: Determining the updated initial injection pressure according to the injection pressure and the injection flow rate includes: According to the injection pressure and the injection flow rate, a curve of injection pressure-injection flow rate versus injection time is obtained; The updated initial injection pressure is obtained according to the injection pressure-injection flow rate versus injection time variation curve, wherein the updated initial injection pressure is the injection pressure when the injection stops in the injection pressure-injection flow rate versus injection time variation curve.

9. A control device for injecting a retardant liquid into a coal seam, characterized in that: include: A first acquisition step is used to acquire at least one sampling data of at least one area to be injected in the target coal seam; A first determining unit, configured to determine an initial injection pressure of a first area to be injected at least according to the sampling data, so that an injection module injects liquid into the first area to be injected according to the initial injection pressure; A second acquisition unit, used for acquiring a first injection flow rate of the injection module at a first moment; A regulating unit is used to regulate the injection pressure of the injection module at a second moment according to the first injection flow rate and the initial injection pressure, where the second moment is a moment after the first moment.

10. A control system for injecting a retardant liquid into a coal seam, characterized in that: include: One or more processors, a memory, one or more programs, a scanning device, an injection system, and an ultrasonic detection device, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the processors are connected to the scanning device to obtain at least one sampling data of at least one area to be injected in the target coal seam; The processor is connected to the injection system to inject liquid into the first area to be injected according to the initial injection pressure. The processor is connected to the ultrasonic detection equipment to obtain the first injection flow rate at the first moment. The one or more programs include a control method for executing the coal seam injection of inhibitory liquid as described in any one of claims 1 to 8.

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