Device and method for monitoring deformation of surrounding rock in coal seam reaming and slotting cavity

Abstract

The invention provides a surrounding rock deformation monitoring device and method for a coal seam reaming and slotting cavity. The device comprises an elastic air bag, a liquid pumping assembly and a monitoring assembly, the liquid pumping assembly comprises a pump body, a liquid inlet pipeline and a liquid storage container; the monitoring assembly comprises a liquid outlet pipeline and a monitor; the elastic air bag is positioned in a reaming slotting hole in the coal seam; the pump body is used for pumping the liquid in the liquid storage container to the elastic air bag through the liquid inlet pipeline, so that the elastic air bag is expanded to the size of a hole for reaming and slotting; when the pressure of the liquid outlet pipeline in the elastic air bag is increased, liquid flows out; and the monitor is used for monitoring the liquid pressure and flow of the liquid outlet pipeline and determining the deformation information of the surrounding rock of the cut cavity based on the liquid pressure and flow. Therefore, according to the scheme, by monitoring the deformation condition of the surrounding rock of the slotting cavity in real time, the pressure relief timeliness of the reaming slotting cavity and the advanced mining influence range of the working face can be researched and analyzed.

Description

Technical Field

[0001] The present application relates to the technical field of coal mining and coal mine safety production, and in particular to a device and method for monitoring deformation of surrounding rock of coal seam hole expansion and grooving. Background Art

[0002] Hydraulic rotary cutting, hole enlargement and slotting to relieve pressure in coal seams is a more effective way to relieve pressure compared to large-diameter drilling. Hydraulic rotary cutting, hole enlargement and slotting to relieve pressure in coal seams mainly uses water jet technology to enlarge and slot large-diameter boreholes in coal seams, so that giant artificial cavities with a size of tens or even hundreds of times larger are formed in the high-stress area of ​​the coal seams. The collapse and deformation of the cavities release the mine pressure, so that the surrounding rock near the tunnel is in a low-stress area, significantly reducing the risk of tunnel impact disasters and the degree of deformation of the tunnel surrounding rock.

[0003] The pressure relief effect of coal seams is positively correlated with the size of the coal seam expansion and slotting cavities. Currently, there is a lack of effective and direct methods to detect the size of the expansion and slotting cavities. On the other hand, with the recovery of the working face, when the working face is close to the coal seam expansion and slotting cavities, the slotting cavities will deform and collapse under the action of the mining field stress. The current geophysical exploration methods cannot dynamically monitor this process. Summary of the invention

[0004] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0005] To this end, the first purpose of the present application is to provide a coal seam hole expansion and slotting cavity surrounding rock deformation monitoring device.

[0006] The second purpose of the present application is to provide a method for monitoring deformation of surrounding rock of coal seam hole expansion and slotting.

[0007] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a coal seam expansion and groove cavity surrounding rock deformation monitoring device, comprising: an elastic airbag, a liquid pumping assembly and a monitoring assembly; the liquid pumping assembly comprises a pump body, a liquid inlet pipeline and a liquid storage container, the pump body is connected to the liquid storage container and the liquid inlet pipeline, and the liquid inlet pipeline is also connected to the interface of the elastic airbag; the monitoring assembly comprises a liquid outlet pipeline and a monitor, the liquid outlet pipeline is connected to the interface of the elastic airbag and the monitor; the elastic airbag is located in the expansion and groove cavity in the coal seam; the pump body is used to pump the liquid in the liquid storage container to the elastic airbag through the liquid inlet pipeline, so that the elastic airbag expands to the size of the expansion and groove cavity; the liquid outlet pipeline flows out the liquid when the pressure in the elastic airbag increases; the monitor is used to monitor the liquid pressure and flow of the liquid outlet pipeline, and determine the deformation information of the surrounding rock of the expansion and groove cavity based on the liquid pressure and flow.

[0008] To achieve the above-mentioned purpose, the second aspect embodiment of the present application proposes a method for monitoring the deformation of the surrounding rock of the borehole and groove cavity in the coal seam, comprising: pumping the liquid in the liquid storage container to the elastic airbag, so that the elastic airbag expands to the size of the borehole and groove cavity in the coal seam, wherein the elastic airbag is within the borehole and groove cavity; when the working face is mined close to the borehole and groove cavity, the liquid pressure in the elastic airbag increases; monitoring the liquid pressure and flow of the liquid flowing out of the elastic airbag; and determining the deformation information of the surrounding rock of the borehole and groove cavity based on the liquid pressure and flow.

[0009] The present application provides a device and method for monitoring deformation of surrounding rock of coal seam expansion and grooving holes. The elastic airbag is placed in the expansion and grooving holes in the coal seam, and the liquid in the liquid storage container is pumped into the elastic airbag to expand the elastic airbag to the size of the expansion and grooving holes. Furthermore, the pressure of the elastic airbag is monitored, and the liquid pressure and flow in the liquid outlet pipeline are obtained to monitor the deformation of the surrounding rock of the expansion and grooving holes according to the liquid pressure and flow. By real-time monitoring of the deformation of the surrounding rock, the timeliness of the pressure relief of the coal seam expansion and grooving holes can be studied and analyzed. When all the liquid in the elastic airbag is discharged, it indicates that the expansion and grooving holes have collapsed, compacted and closed, and the pressure relief effect has been lost.

[0010] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0012] Figure 1 A schematic diagram of the structure of a coal seam hole expansion and slotting cavity surrounding rock deformation monitoring device provided in an embodiment of the present application;

[0013] Figure 2a A schematic plan view of a hole enlargement and cutting in a coal seam provided in an embodiment of the present application;

[0014] Figure 2b A schematic cross-sectional view of a hole enlargement and cutting in a coal seam provided in an embodiment of the present application;

[0015] Figure 3 A schematic diagram of the structure of another coal seam hole expansion and slotting cavity surrounding rock deformation monitoring device provided in an embodiment of the present application;

[0016] Figure 4 A schematic diagram of a coal seam hole expansion and slotting cavity surrounding rock deformation monitoring device provided in an embodiment of the present application;

[0017] Figure 5A schematic flow chart of a method for monitoring deformation of surrounding rock during hole expansion and slotting in a coal seam provided in an embodiment of the present application. DETAILED DESCRIPTION

[0018] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0019] The surrounding rock deformation monitoring device and method according to the embodiments of the present application are described below with reference to the accompanying drawings.

[0020] Figure 1 FIG. 1 is a schematic structural diagram of a coal seam hole expansion and slotting cavity surrounding rock deformation monitoring device according to an exemplary embodiment. Figure 1 As shown, the coal seam hole expansion and slotting cavity surrounding rock deformation monitoring device 100 includes:

[0021] Elastic bladder 101 , liquid pumping component 102 and monitoring component 103 .

[0022] In some implementations, the liquid pumping assembly 102 includes a pump body 121 , a liquid inlet pipeline 122 , and a liquid storage container 123 . The pump body 121 is connected to the liquid storage container 123 and to the liquid inlet pipeline 122 . The liquid inlet pipeline 122 is also connected to the interface of the elastic airbag 101 .

[0023] In some implementations, the monitoring component 103 includes a liquid outlet pipeline 131 and a monitor 132 . The liquid outlet pipeline 131 is communicated with an interface of the elastic airbag 101 and is also connected to the monitor 132 .

[0024] The elastic airbag 101 is located in the hollow of the expanded hole in the coal seam.

[0025] Figure 2a The diagram shows a plan view of a hole-expanding and slotting cavity in a coal seam. Figure 2b Shown is a schematic cross-sectional view of a hole enlarged and cut in a coal seam.

[0026] The pump body 121 is used to pump the liquid in the liquid storage container 123 to the elastic airbag 101 through the liquid inlet pipeline 122, so that the elastic airbag 101 expands to the size of the expanded hole.

[0027] Liquid flows out of the liquid outlet pipe 131 when the pressure in the elastic airbag 101 increases.

[0028] The monitor 132 is used to monitor the liquid pressure and flow rate of the liquid outlet pipeline 131, and determine the deformation information of the surrounding rock of the hole expansion and cutting cavity based on the liquid pressure and flow rate.

[0029] In some implementations, the elastic airbag 101 is sent into a borehole-expanding cavity in a coal seam, and the liquid in a liquid storage container 123 is sent into the elastic airbag 101 by a pump body 121 based on a liquid inlet pipeline 122 connected to an interface of the elastic airbag 101, so that the elastic airbag 101 expands to the size of the borehole-expanding cavity.

[0030] In some implementations, when the elastic airbag 101 expands to the size of the reaming and grooving cavity, the volume of the reaming and grooving cavity can be calculated based on the volume of the liquid pumped into the elastic airbag 101. Alternatively, by determining the change in the liquid in the liquid storage container 123, the volume of the liquid pumped into the elastic airbag 101 can be determined, and then converted into the volume of the reaming and grooving cavity.

[0031] In some implementations, whether the elastic airbag 101 has expanded to the size of the hole for enlarging the hole or not can be determined based on whether liquid flows out of the liquid outlet pipeline 131. That is, if liquid flows out of the liquid outlet pipeline 131 and it is determined that the elastic airbag 101 has expanded to the size of the hole for enlarging the hole or not, the pump body 121 and the liquid outlet pipeline 131 can be turned off to prevent the liquid from being continuously pumped into the elastic airbag 101.

[0032] It is understandable that as the working face is continuously mined and approaches the slot cavity, the slot cavity will undergo varying degrees of deformation or even collapse under the action of the mining field stress. During this process, the elastic airbag 101 filled with liquid will be compressed due to the deformation of the cavity, and the liquid pressure in the elastic airbag 101 will increase.

[0033] In some implementations, when the pressure of the liquid in the elastic airbag 101 increases, the switch of the liquid outlet pipeline 131 can be opened to allow the liquid in the elastic airbag 101 to flow out.

[0034] In some implementations, the monitor 132 may monitor the liquid pressure and flow rate of the liquid outlet pipeline 131 to determine the deformation information of the surrounding rock of the hole expansion and cutting cavity based on the liquid pressure and flow rate.

[0035] Optionally, the variation curve between time and liquid pressure and the variation curve between time and flow rate may be plotted, and the deformation information of the surrounding rock of the hole enlargement and cutting may be determined according to the variation curves.

[0036] The coal seam expansion and groove cavity surrounding rock deformation monitoring device provided in the embodiment of the present application is implemented by placing an elastic airbag in the expansion and groove cavity in the coal seam, and pumping the liquid in the liquid storage container into the elastic airbag, so that the elastic airbag expands to the size of the expansion and groove cavity. Furthermore, the pressure of the elastic airbag is monitored, and the liquid pressure and flow in the liquid outlet pipeline are obtained to monitor the deformation of the surrounding rock of the expansion and groove cavity according to the liquid pressure and flow. By real-time monitoring of the deformation of the surrounding rock, the timeliness of the pressure relief of the coal seam expansion and groove cavity can be studied and analyzed. When the liquid in the elastic airbag is completely discharged, the expansion and groove cavity collapses, compacts and closes, and the pressure relief effect is lost.

[0037] Figure 3 FIG. 1 is a schematic structural diagram of a coal seam hole expansion and slotting cavity surrounding rock deformation monitoring device according to an exemplary embodiment. Figure 3 As shown, the coal seam expansion and grooving cavity surrounding rock deformation monitoring device 200 includes: an elastic airbag 201, a liquid pumping component 202 and a monitoring component 203, a pump body 221, a liquid inlet pipeline 222 and a liquid storage container 223, and a liquid outlet pipeline 231 and a monitor 232.

[0038] In some implementations, the coal seam expansion and slotting cavity surrounding rock deformation monitoring device 200 further includes a telescopic tube 104, wherein the telescopic tube 104 is used to deliver an elastic air bag into the expansion and slotting cavity.

[0039] In some implementations, the coal seam hole expansion and slotting cavity surrounding rock deformation monitoring device 200 further includes a one-way valve 205, and the one-way valve 205 is connected to the pump body 221 and the liquid inlet pipeline 222 respectively.

[0040] In some implementations, the one-way valve 205 is used to control the flow of liquid from the liquid storage container 223 to the liquid inlet pipeline 222 .

[0041] In some implementations, the liquid pressure in the elastic airbag 201 gradually increases as the working face gradually approaches the reaming and slotting cavity. The monitor 232 can monitor the pressure in the elastic airbag 201 and monitor the liquid pressure and flow of the liquid outlet pipeline 231 when the pressure is greater than a set threshold.

[0042] Optionally, the monitor 232 includes: a relief valve 21 , a flow meter 22 , a monitoring pipeline 23 and a pressure gauge 24 .

[0043] In some implementations, one end of the monitoring line 23 is connected to the liquid outlet line 231 , and the other end is connected to the liquid storage container 223 . That is, the liquid in the liquid outlet line 231 flows into the monitoring line 232 , thereby monitoring the liquid pressure and flow of the liquid line 231 .

[0044] In some implementations, the overflow valve 21, the flow meter 22 and the pressure gauge 24 are respectively arranged on the monitoring pipeline 23, wherein the overflow valve 21 is used to open when the liquid pressure in the airbag is greater than the overflow valve value to allow the liquid in the liquid outlet pipeline 231 to flow into the monitoring pipeline 23; the flow meter 22 is used to monitor the flow of the monitoring pipeline 23; the pressure gauge 24 is used to monitor the liquid pressure of the monitoring pipeline.

[0045] In some implementations, before monitoring the pressure in the elastic airbag 201, the monitor 232 can also monitor whether there is liquid flowing out of the liquid outlet pipeline 231 to determine whether the elastic airbag 201 has expanded to the size of the hole for enlarging the hole. That is, if the pressure in the elastic airbag 201 is greater than the overflow threshold value, liquid flows out of the liquid outlet pipeline 231, and it is determined that the elastic airbag 201 has expanded to the size of the hole for enlarging the hole for enlarging the hole, the pump body 221 and the liquid outlet pipeline 231 can be turned off at this time to prevent the liquid from being continuously pumped into the elastic airbag 101. That is, the monitor 232 is also used to control the closure of the pump body 221 and the liquid outlet pipeline 231 after the overflow valve is opened.

[0046] In some implementations, when the elastic airbag 201 expands to the size of the reaming cavity, the volume of the reaming cavity can be calculated based on the volume of liquid pumped into the elastic airbag 201. Alternatively, the volume of liquid pumped into the elastic airbag 101 can be determined by determining the change in the liquid in the liquid storage container 123.

[0047] In some implementations, a meter 24 is provided in the liquid storage container 223, and the meter 24 is used to measure the real-time liquid volume of the liquid storage container 223. In other words, the monitoring component 203 is also used to: determine the volume of the liquid pumped to the elastic airbag 201 according to the real-time liquid volume of the meter 24 as the volume of the groove cavity.

[0048] The coal seam expansion and groove cavity surrounding rock deformation monitoring device provided in the embodiment of the present application is configured by placing an elastic airbag in the expansion and groove cavity in the coal seam, and pumping the liquid in the liquid storage container into the elastic airbag, so that the elastic airbag expands to the size of the expansion and groove cavity. Furthermore, the pressure of the elastic airbag is monitored, and the overflow valve is opened when the pressure is greater than the overflow valve value, so that the liquid in the liquid outlet pipeline flows into the monitoring pipeline, the liquid pressure and flow are monitored, and the deformation of the surrounding rock of the expansion and groove cavity is monitored based on the liquid pressure and flow. By real-time monitoring of the deformation of the surrounding rock, the timeliness of the pressure relief of the coal seam expansion and groove cavity can be studied and analyzed. When the liquid in the elastic airbag is completely discharged, the expansion and groove cavity collapses, compacts and closes, and the pressure relief effect is lost.

[0049] Figure 4 Shown is a schematic diagram of a coal seam hole expansion and slotting cavity surrounding rock deformation monitoring device. Figure 4The coal seam expansion and slotting cavity surrounding rock deformation monitoring device consists of 5 parts: 1. retractable steel pipe, 2. water pump and liquid inlet pipeline, 3. elastic air bag, 4. liquid outlet pipeline and monitoring console, 5. water tank and buoy.

[0050] Among them, there is a one-way valve between the water pump and the liquid inlet pipeline, which is used to control the liquid in the water tank to only flow from the water tank into the liquid inlet pipeline to avoid liquid backflow.

[0051] Among them, the retractable steel pipe is the retractable pipe in the embodiment of the present application, the water pump is the pump body in the embodiment of the present application, the monitoring console is the monitor in the embodiment of the present application, including: an overflow valve, a flow meter, a pressure gauge and a water pipe, the water pipe is the monitoring pipeline in the embodiment of the present application, the water tank is the liquid storage container in the embodiment of the present application, and the float ruler is the measuring instrument in the embodiment of the present application.

[0052] First, connect the liquid inlet and outlet pipelines to the elastic airbag interface. After the connection is completed, connect the liquid inlet and outlet pipelines to the water pump and the monitoring console, and send the elastic airbag to the expansion hole and grooving cavity position through a retractable steel pipe.

[0053] Turn on the water pump to pump the liquid in the water tank into the elastic airbag through the liquid inlet pipeline until the elastic airbag expands to the size of the hole. Further, when the pressure in the elastic airbag is greater than the overflow threshold and liquid flows out of the liquid outlet pipeline, turn off the water pump and the liquid outlet pipeline switch, where the switch of the liquid outlet pipeline is located at the water pipe connected to the water tank, that is, at the monitoring console.

[0054] At this time, the changes in the water tank float can be observed to measure and calculate the volume of the liquid pumped into the elastic airbag, thereby obtaining the volume of the groove cavity.

[0055] Furthermore, as the working face is continuously mined and approaches the slot cavity, the slot cavity will be deformed to varying degrees or even collapse under the action of the mining field stress. In this process, the elastic airbag filled with liquid will be compressed and deformed due to the deformation of the cavity, and the liquid pressure in the elastic airbag will increase. When the pressure is greater than the overflow valve threshold, the overflow valve opens, and the liquid in the elastic airbag will flow out from the liquid outlet pipeline. The overflow valve opening situation, the liquid pressure and flow rate of the liquid outlet pipeline can be monitored and recorded to generate a change curve between time and liquid pressure, and a change curve between time and flow rate according to the liquid pressure and flow rate, and determine the deformation information of the surrounding rock of the hole expansion slot cavity according to the change curve. Among them, the pressure gauge can monitor the liquid pressure in the water pipe, and the flow meter can monitor the flow rate in the water pipe.

[0056] Figure 5 FIG. 1 is a flow chart showing a method for monitoring deformation of surrounding rock of coal seam hole expansion and slotting according to an exemplary embodiment. Figure 5As shown, the method for monitoring deformation of surrounding rock of coal seam hole expansion and slotting provided in the embodiment of the present application includes but is not limited to the following steps:

[0057] S501, pumping the liquid in the liquid storage container to the elastic airbag, so that the elastic airbag expands to the size of the hole expansion and groove cutting cavity in the coal seam, wherein the elastic airbag is in the hole expansion and groove cutting cavity.

[0058] In some implementations, an elastic airbag is sent into a hollow cavity of a borehole cut in a coal seam, and liquid in a liquid storage container is pumped into the elastic airbag, so that the elastic airbag continues to expand until it expands to the size of the borehole cut cavity.

[0059] Optionally, the liquid in the liquid storage container can be pumped to the elastic airbag by a water pump, and the water pump can be turned off when the elastic airbag expands to expand the size of the hole.

[0060] In some implementations, the elastic airbag is connected to a liquid inlet pipeline and a liquid outlet pipeline, wherein the liquid inlet pipeline is used to transfer liquid to the elastic airbag, and the liquid outlet pipeline is used to flow out the liquid in the elastic airbag. That is, when the liquid flows out of the liquid outlet pipeline, the size of the hole formed by the expansion and grooving of the elastic airbag is determined, and at this time, the water pump and the liquid outlet pipeline switch can be turned off.

[0061] S502, when the working face is mined close to the hole expansion and grooving cavity, the liquid pressure in the elastic airbag increases.

[0062] It is understandable that as the working face continues to be mined and approaches the slot cavity, the slot cavity will undergo varying degrees of deformation or even collapse under the action of the mining field stress. During this process, the elastic airbag filled with liquid will be deformed due to the cavity, and the liquid pressure in the elastic airbag will increase, thereby causing compression deformation.

[0063] S503, monitoring the liquid pressure and flow rate of the liquid flowing out of the elastic airbag.

[0064] In some implementations, the liquid pressure in the elastic airbag can be monitored, and the overflow valve can be opened when the liquid pressure is greater than the overflow valve threshold, so that the liquid in the elastic airbag can flow out. In other words, in response to the liquid pressure in the elastic airbag being greater than or equal to the overflow valve threshold, the overflow valve is activated to allow the liquid in the elastic airbag to flow out.

[0065] Furthermore, the liquid flowing out of the elastic airbag is monitored to determine the liquid pressure and flow rate.

[0066] Optionally, the flow rate of the liquid can be monitored based on a flow meter, and the liquid pressure of the liquid can be monitored using a pressure gauge.

[0067] S504, based on the liquid pressure and flow rate, determine the deformation information of the surrounding rock of the hole expansion and cutting.

[0068] In some implementations, different time points for monitoring liquid pressure and flow can be determined, and a time-pressure variation curve can be generated based on the liquid pressure monitored at different time points, and a time-flow variation curve can be generated based on the flow monitored at different time points.

[0069] Optionally, visualization software may be used to generate corresponding change curves according to time points, liquid pressures, and flow rates.

[0070] Further, the deformation information of the surrounding rock of the hole and the slot can be determined according to the time-pressure change curve and the time-flow change curve. Optionally, the time-pressure change curve and the time-flow change curve can be analyzed to determine the pressure change trend and the flow change trend, and to determine the mutation point in the curve, so as to determine the deformation information of the surrounding rock of the hole and the slot according to the change trend and the mutation point.

[0071] Alternatively, if both change curves show obvious change trends or mutation points, and the changes correspond to each other in time, it may indicate that significant deformation has occurred in the surrounding rock.

[0072] The method for monitoring deformation of surrounding rock of coal seam expansion and groove cavity provided in the embodiment of the present application is to place an elastic airbag in the expansion and groove cavity in the coal seam, and pump the liquid in the liquid storage container into the elastic airbag, so that the elastic airbag expands to the size of the expansion and groove cavity. Furthermore, by increasing the pressure in the elastic airbag, and opening the overflow valve when the pressure is greater than the overflow valve value, so that the liquid in the liquid outlet pipeline flows into the monitoring pipeline, the liquid pressure and flow are monitored, and the deformation of the surrounding rock of the expansion and groove cavity is monitored according to the liquid pressure and flow. By real-time monitoring of the deformation of the surrounding rock, the timeliness of the pressure relief of the coal seam expansion and groove cavity can be studied and analyzed. When the liquid in the elastic airbag is completely discharged, the expansion and groove cavity collapses, compacts and closes, and the pressure relief effect is lost.

[0073] The collection, storage, use, processing, transmission, provision and application of user personal information involved in this application are in compliance with relevant laws and regulations and do not violate public order and good morals.

[0074] It should be noted that personal information from users should be collected for legitimate and reasonable purposes and should not be shared or sold outside of these legitimate uses. In addition, such collection / sharing should be carried out after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign the agreement / authorization including authorization of relevant user information before the user uses the function. In addition, any necessary steps should be taken to protect and safeguard access to such personal information data and ensure that others who have access to personal information data comply with its privacy policy and procedures.

[0075] This application is expected to provide an implementation scheme for users to selectively block the use or access of personal information data. That is, this application is expected to provide hardware and / or software to prevent or block access to such personal information data. Once the personal information data is no longer needed, risks can be minimized by limiting data collection and deleting data. In addition, when applicable, personal identifiers are removed from such personal information to protect the privacy of users.

[0076] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0077] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0078] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0079] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0080] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0081] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0082] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0083] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A coal seam hole expansion and slotting cavity surrounding rock deformation monitoring device, characterized in that: The device comprises: Elastic bladders, fluid pumping components, and monitoring components; The liquid pumping assembly comprises a pump body, a liquid inlet pipeline and a liquid storage container, wherein the pump body is in communication with the liquid storage container and is also connected to the liquid inlet pipeline, and the liquid inlet pipeline is also in communication with the interface of the elastic airbag; The monitoring assembly includes a liquid outlet pipeline and a monitor, wherein the liquid outlet pipeline is communicated with the interface of the elastic airbag and is also connected to the monitor; The elastic airbag is located in the hollow of the expanded hole and cutout in the coal seam; The pump body is used to pump the liquid in the liquid storage container to the elastic airbag through the liquid inlet pipeline, so that the elastic airbag expands to the size of the expanded hole; The liquid outlet pipeline flows out liquid when the pressure in the elastic airbag increases; The monitor is used to monitor the liquid pressure and flow rate of the liquid outlet pipeline, and determine the deformation information of the surrounding rock of the hole expansion and cutting cavity based on the liquid pressure and flow rate.

2. The device according to claim 1, characterized in that The device also includes: A telescopic tube, used to deliver the elastic airbag into the hollow cavity of the reaming and grooving; A one-way valve, the one-way valve is connected to the pump body and the liquid inlet pipeline respectively; The one-way valve is used to control the flow of liquid from the liquid storage container to the liquid inlet pipeline.

3. The device according to claim 1, characterized in that The monitor comprises: a relief valve, a flow meter, a monitoring pipeline and a pressure gauge; One end of the monitoring pipeline is connected to the liquid outlet pipeline, and the other end is connected to the liquid storage container; The overflow valve, the flow meter and the pressure gauge are respectively arranged on the monitoring pipeline; The overflow valve is used to open when the liquid pressure in the airbag is greater than the overflow valve value, so that the liquid in the liquid outlet pipeline flows into the monitoring pipeline; The flow meter is used to monitor the flow of the monitoring pipeline; The pressure gauge is used to monitor the liquid pressure in the monitoring pipeline.

4. The device according to claim 3, characterized in that The monitor is also used to control the closing of the pump body and the liquid outlet pipeline after the overflow valve is opened.

5. The device according to any one of claims 1 to 4, characterized in that The liquid pressure in the elastic airbag gradually increases as the working face approaches the expanded hole and groove cavity.

6. The device according to any one of claims 1 to 4, characterized in that The liquid storage container is provided with a meter, and the meter is used to measure the real-time liquid amount in the liquid storage container.

7. The device according to claim 6, characterized in that The monitoring component is also used for: According to the real-time liquid quantity of the meter, the volume of the liquid pumped to the elastic airbag is determined as the volume of the cutout cavity.

8. A method for monitoring deformation of surrounding rock of coal seam hole expansion and slotting, characterized in that: Applicable to the device according to any one of claims 1 to 7, the method comprising: Pumping the liquid in the liquid storage container to the elastic airbag so that the elastic airbag expands to the size of the hole in the coal seam, wherein the elastic airbag is in the hole in the coal seam; When the working face is mined close to the reaming and slotting cavity, the liquid pressure in the elastic airbag increases; monitoring the liquid pressure and flow rate of the liquid flowing out of the elastic airbag; Based on the liquid pressure and flow rate, the deformation information of the surrounding rock of the hole expansion and cutting cavity is determined.

9. The method according to claim 8, characterized in that Before monitoring the liquid pressure and flow rate of the liquid flowing out of the elastic airbag, the method further includes: In response to the liquid pressure in the elastic airbag being greater than or equal to a relief valve threshold, the relief valve is activated to allow the liquid in the elastic airbag to flow out.

10. The method according to claim 8, characterized in that Determining the deformation information of the surrounding rock of the hole enlargement and cutting based on the liquid pressure and flow rate includes: Generating a time-pressure variation curve according to the liquid pressure monitored at different time points; Generate a time-flow change curve based on the flow monitored at different time points; The deformation information of the surrounding rock of the hole expansion and cutting is determined according to the time-pressure variation curve and the time-flow variation curve.

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