Methods and devices for determining the water inflow of undesirable boreholes

Abstract

This application provides a method and apparatus for determining the water inflow of a faulty borehole. The method includes: first, acquiring operational information about the area where the faulty borehole is located, including exploration data of the faulty borehole and engineering geological conditions of the area; then, based on the operational information, determining the endpoint of the crack caused by the faulty borehole damaging the floor of the upper coal seam, obtaining a first position, and determining the endpoint of the height of the water-conducting fracture zone developed by the faulty borehole in the lower coal seam, obtaining a second position; subsequently, based on the operational information, determining the flow data of each aquifer and each impermeable layer between the first and second positions, including flow velocity, flow pressure, and head loss information; finally, determining the target water inflow of the faulty borehole based on the operational information and the flow data. This method ensures high accuracy in determining the target water inflow.

Description

Technical Field

[0001] This application relates to the field of coal mining technology, and more specifically, to a method and apparatus for determining the water inflow of an undesirable borehole. Background Technology

[0002] Mine water hazards induced by poorly sealed boreholes due to coal mining disturbances are one of the important safety hazards in the safe mining of underground coal resources.

[0003] As the mining depth of the coal face increases and the long-term role of coal as the main energy source is realized, the upper coal face is mined and the lower coal face is mined. Considering the poorly sealed boreholes in the working face and the water accumulation in the goaf of the upper coal face, during the mining of the lower coal face, the boreholes will connect with a large amount of water in the goaf of the upper coal face, causing a sudden water inrush accident where water in the goaf of the upper coal face flows into the mining space of the lower coal face through the boreholes.

[0004] Therefore, there is an urgent need for a method to predict the water inflow from poorly sealed boreholes affected by water accumulation in the goaf of the upper coal seam. Summary of the Invention

[0005] The main objective of this application is to provide a method and apparatus for determining the water inflow of undesirable boreholes, so as to at least solve the problem of difficulty in quickly and accurately predicting coal mine water inflow in the prior art.

[0006] To achieve the above objectives, according to one aspect of this application, a method for determining the water inflow of a faulty borehole is provided. The faulty borehole connects an upper coal seam and a lower coal seam, and there are multiple aquifers and multiple impermeable layers between the upper and lower coal seams. The method includes: acquiring working condition information of the area where the faulty borehole is located, the working condition information including exploration data of the faulty borehole and engineering geological conditions of the area; determining, based on the working condition information, the endpoint position of the crack caused by the faulty borehole damaging the floor of the upper coal seam, obtaining a first position, and determining the impact of the faulty borehole on the water inflow of the upper coal seam. The endpoint of the water-conducting fracture zone development height of the lower coal seam is used to obtain the second position. The first position is the position reached by the faulty borehole to damage the bottom of the upper coal seam, and the second position is the position reached by the faulty borehole to damage the top of the lower coal seam. Based on the operating condition information, water flow data of each aquifer and each aquitard between the first and second positions are determined. The water flow data includes water flow velocity information, water flow pressure information, and head loss information. Based on the operating condition information and the water flow data, the target water inflow of the faulty borehole is determined.

[0007] Optionally, based on the operating condition information, determining the water flow data at the locations of each aquifer and each impermeable layer between the first and second locations includes: acquiring initial water flow pressure information and initial water flow velocity information at the first location, wherein the initial water flow pressure information is p = ρgh, where h is the water depth in the upper coal seam, ρ is the water density, and g is the gravitational acceleration; and determining the water flow data at the interface between the impermeable layer and the aquifer between the first and second locations based on the operating condition information, the initial water flow pressure information, and the initial water flow velocity information, and determining the water flow data at the second location.

[0008] Optionally, based on the operating condition information, the initial water flow pressure information, and the initial water flow velocity information, the water flow data at the interface between the impermeable layer and the aquifer between the first and second positions is determined, and the water flow data at the second position is determined, including: obtaining a first relational expression, a second relational expression, a third relational expression, and a fourth relational expression, wherein the first relational expression is... The second relation is The third relation is: The fourth relation is: in, τ is used to characterize the shear stress of the borehole wall on the water flow in the poorly drilled hole. Z0 and Z1 represent the positional water head at the locations of two adjacent interfaces, with Z0 being the positional water head near the interface of the upper coal seam and Z1 being the positional water head near the interface of the lower coal seam. Both Z0 and Z1 can be represented by the distance of the interface from the first position. p0 is the pressure of the aquitard near the interface of the upper coal seam, p1 is the pressure of the aquitard near the interface of the lower coal seam, and p2 is the pressure of the aquifer near the interface of the lower coal seam. γ w For the specific gravity of water, v o v1 and v2 represent the water flow velocities at the locations of two adjacent interfaces, and v3 and v4 represent the water flow velocities at the locations of the interfaces. o v1 is the water flow velocity at the interface of the aquitard near the upper coal seam, v2 is the water flow velocity at the interface of the aquitard near the lower coal seam, and v3 is the water flow velocity at the interface of the aquifer near the lower coal seam. o And the same as v1, h y h is the head loss during the process of water flowing through the impermeable layer. ywThe head loss is the water flow rate during the process of water flowing through the aquifer, f is the drag coefficient, L and L2 are the distance between two adjacent interfaces, d is the diameter of the faulty borehole, v is the water flow velocity in the faulty borehole, A is the cross-sectional area of ​​the faulty borehole, and S is the cross-sectional perimeter of the faulty borehole.

[0009] Optionally, determining the target inflow of the faulty borehole based on the operating condition information and the water flow data includes: acquiring first water flow velocity information at the second location in the water flow data; and determining the target inflow of the faulty borehole based on the operating condition information and the first water flow velocity information. Among them, v 终 This refers to the first water flow velocity information.

[0010] Optionally, based on the first relation, the second relation, the third relation, the fourth relation, the initial water flow pressure information, the initial water flow velocity information, and the operating condition information, the water flow data at the locations of each aquifer and each impermeable layer between the first and second locations is determined, including: based on the first relation, the second relation, the initial water flow pressure information, the initial water flow velocity information, and the operating condition information, determining the first pressure information and the second water flow velocity information at the interface of the impermeable layer near the lower coal seam, and determining the first head loss information of the impermeable layer based on the second relation and the initial water flow velocity information; based on the first relation, the third relation, the second water flow velocity information, and the operating condition information, determining the second pressure information and the third water flow velocity information at the interface of the aquifer near the lower coal seam, and determining the second head loss information of the aquifer based on the second water flow velocity information, the third water flow velocity information, and the fourth relation.

[0011] Optionally, after determining the flow data of each aquifer and each impermeable layer between the first and second positions based on the first, second, third, and fourth relational expressions, the initial flow pressure information, the initial flow velocity information, and the operating condition information, the method further includes: obtaining a preset first head drawdown, the first head drawdown being used to characterize the expected depth of water level drop; and determining a second head drawdown between the first and second positions based on the operating condition information, multiple first head loss information, multiple second head loss information, the first pressure information at the second position, and the second flow velocity information at the second position. Wherein, v5 is the water flow velocity at the outlet of the faulty borehole, p5 is the water flow pressure at the outlet of the faulty borehole, and the second head drawdown is used to characterize the theoretical depth of water level drop; if the difference between the first head drawdown and the second head drawdown is less than a predetermined value, the target inflow rate is determined to meet the predetermined requirements.

[0012] Optionally, based on the operating condition information, determining the endpoint position of the crack caused by the faulty borehole damaging the floor of the upper coal seam to obtain a first position, and determining the endpoint position of the height of the water-conducting fracture zone of the lower coal seam caused by the faulty borehole to obtain a second position, includes: acquiring a predetermined model, wherein the predetermined model is trained by machine learning using multiple sets of predetermined data, each set of predetermined data including historical operating condition information and corresponding first and second historical positions; inputting the operating condition information into the predetermined model to obtain the first and second positions corresponding to the faulty borehole.

[0013] Optionally, the exploration data information of the defective borehole includes columnar section information and borehole diameter information of the defective borehole, and the engineering geological condition information includes at least the spatial location information, thickness information and physical and mechanical parameter information of the defective borehole, the upper coal seam, the aquifer, the aquitard and the lower coal seam.

[0014] Optionally, both the upper coal seam and the lower coal seam are in contact with the aquitard, and the aquifer is located between two adjacent aquitards.

[0015] According to another aspect of this application, a device for determining the water inflow of a faulty borehole is also provided. The faulty borehole connects an upper coal seam and a lower coal seam, and there are multiple aquifers and multiple impermeable layers between the upper and lower coal seams. The device includes a first acquisition unit, a first determination unit, a second determination unit, and a third determination unit. The first acquisition unit is used to acquire working condition information of the area where the faulty borehole is located, including exploration data of the faulty borehole and engineering geological conditions of the area. The first determination unit is used to determine the endpoint of the crack caused by the faulty borehole damaging the floor of the upper coal seam based on the working condition information, thereby obtaining a first... The first determination unit determines the endpoint of the water-conducting fracture zone development height of the poorly drilled borehole in the lower coal seam, thus obtaining a second position. The first position is the position reached by the poorly drilled borehole in causing damage to the bottom of the upper coal seam, and the second position is the position reached by the poorly drilled borehole in causing damage to the top of the lower coal seam. The second determination unit is used to determine the water flow data of each aquifer and each aquitard between the first and second positions based on the operating condition information. The water flow data includes water flow velocity information, water flow pressure information, and head loss information. The third determination unit is used to determine the target water inflow of the poorly drilled borehole based on the operating condition information and the water flow data.

[0016] According to the technical solution of this application, the method for determining the water inflow of the defective borehole firstly acquires the working condition information of the area where the defective borehole is located, including the exploration data information of the defective borehole and the engineering geological conditions information of the area; then, based on the working condition information, the endpoint position of the crack caused by the defective borehole to the bottom of the upper coal seam is determined to obtain a first position, and the endpoint position of the development height of the water-conducting fracture zone of the lower coal seam caused by the defective borehole is determined to obtain a second position, wherein the first position is the position reached by the defective borehole to the bottom of the upper coal seam, and the second position is the position reached by the defective borehole to the top of the lower coal seam; then, based on the working condition information, the water flow data of each aquifer and each impermeable layer between the first position and the second position is determined, including water flow velocity information, water flow pressure information, and head loss information; finally, based on the working condition information and the water flow data, the target water inflow of the defective borehole is determined. Compared to the difficulty in quickly and accurately predicting coal mine water inflow in existing technologies, the method for determining water inflow from defective boreholes in this application first obtains the working condition information of the defective borehole, then determines the first and second locations using the working condition information. This allows for the determination of the location of cracks in the coal seam caused by the defective borehole, ensuring accurate identification of the water's location. Next, the water flow data at each level between the first and second locations is determined using the working condition information. Specifically, the water flow data at each cross-section of the defective borehole is determined based on the working condition information, ensuring accurate and rapid determination of water flow velocity, pressure, and head loss at each location of the defective borehole. Finally, the target water inflow of the defective borehole is determined using the working condition information and the water flow data, ensuring high accuracy of the target water inflow and solving the problem of difficulty in quickly and accurately predicting coal mine water inflow in existing technologies. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 A hardware block diagram of a mobile terminal for performing a method for determining the inflow of water from a faulty borehole, according to an embodiment of this application, is shown.

[0019] Figure 2 A flowchart illustrating a method for determining the water inflow of an undesirable borehole according to an embodiment of this application is shown.

[0020] Figure 3A schematic diagram of the structure of an upper coal seam, a lower coal seam, an aquifer, and an impermeable layer provided according to an embodiment of this application is shown.

[0021] Figure 4 A structural block diagram of a device for determining the inflow of water from a faulty borehole, according to an embodiment of this application, is shown.

[0022] The above figures include the following reference numerals:

[0023] 100. Poor borehole; 102. Processor; 104. Memory; 106. Transmission equipment; 108. Input / output device; 200. Upper coal seam; 300. First aquifer; 400. Aquifer; 500. Second aquifer; 600. Lower coal seam. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] As described in the background section, the prior art suffers from the problem of difficulty in quickly and accurately predicting coal mine water inflow. To address this issue, embodiments of this application provide a method and apparatus for determining the water inflow of undesirable boreholes.

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] The methods and embodiments provided in this application can be executed on a mobile terminal, computer terminal, or similar computing device. Taking running on a mobile terminal as an example, Figure 1 This is a hardware structure block diagram of a mobile terminal for a method of determining the water inflow of a faulty borehole, according to an embodiment of the present invention. Figure 1 As shown, a mobile terminal may include one or more ( Figure 1 Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data are also shown. The mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the mobile terminal described above. For example, the mobile terminal may also include components that are more... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0030] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the method for determining the water inflow in poor boreholes in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby implementing the above-described method. The memory 104 may include high-speed random access memory and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or send data via a network. Specific examples of the aforementioned networks may include wireless networks provided by the mobile terminal's communication provider. In one example, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station 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.

[0031] This embodiment provides a method for determining the water inflow of a faulty borehole that runs on a mobile terminal, computer terminal, or similar computing device. The faulty borehole connects an upper coal seam and a lower coal seam, and there are multiple aquifers and multiple water-resistant layers between the upper and lower coal seams. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0032] Figure 2 This is a flowchart of a method for determining the water inflow from a faulty borehole according to an embodiment of this application. Figure 2 As shown, the method includes the following steps:

[0033] Step S201: Obtain the working condition information of the area where the aforementioned defective borehole is located. The working condition information includes the exploration data information of the aforementioned defective borehole and the engineering geological conditions information of the aforementioned area.

[0034] Specifically, the aforementioned defective boreholes are closed defective boreholes. The aforementioned working condition information specifically includes a columnar section of the closed defective borehole, the borehole diameter of the closed defective borehole, a comprehensive columnar section of the working face and the mining area (hydrogeology), the spatial relationship between the closed defective borehole in the coal mining face and the water accumulation in the goaf of the upper coal group, the mining thickness of the aforementioned upper coal group and the aforementioned lower coal group, the slope length of the working face of the aforementioned upper coal group and the aforementioned lower coal group, and the physical and mechanical parameters of the roof and floor strata of the working face of the aforementioned upper coal group and the aforementioned lower coal group.

[0035] Step S202: Based on the above working condition information, determine the endpoint position of the crack caused by the failure of the borehole to the bottom plate of the upper coal seam, and obtain the first position; and determine the endpoint position of the development height of the water-conducting fracture zone of the lower coal seam caused by the failure of the borehole, and obtain the second position. The first position is the position reached by the failure of the borehole to the bottom of the upper coal seam, and the second position is the position reached by the failure of the borehole to the top of the lower coal seam.

[0036] Specifically, the first position mentioned above refers to the situation where, due to the poor drilling, cracks appear in the bottom plate of the coal seam, and water accumulates at the cracks. In other words, the actual height of the water in the upper coal seam is not only the height of the water in the upper coal seam, but also includes the water present due to the cracks. That is to say, the first position mentioned above is the actual bottom position of the water in the upper coal seam. Similarly, the second position mentioned above also refers to the situation where, due to the poor drilling, cracks appear at the top of the lower coal seam, causing water to accumulate. In other words, the second position mentioned above is the actual height that the water in the lower coal seam can reach.

[0037] Step S203: Based on the above working condition information, determine the water flow data of each of the above-mentioned aquifers and the above-mentioned impermeable layers between the first position and the second position. The water flow data includes water flow velocity information, water flow pressure information and head loss information.

[0038] Specifically, the aforementioned water flow data includes the water flow data at the first position, the second position, and each cross-sectional position between the first position and the second position. The water flow data of the aquifer and the impermeable layer actually includes the water flow data of the upper and lower surfaces of each layer.

[0039] Step S204: Based on the above operating condition information and the above water flow data, determine the target water inflow of the above-mentioned defective borehole.

[0040] Specifically, the aforementioned water inflow actually refers to the amount of water accumulated in the upper coal seam that flows into the lower coal seam through the aforementioned defective borehole, and water from the aquifer also flows into the aforementioned defective borehole.

[0041] In the method for determining the water inflow of the aforementioned defective borehole, firstly, the working condition information of the area where the defective borehole is located is obtained, including exploration data of the defective borehole and engineering geological conditions of the area; then, based on the working condition information, the endpoint position of the crack caused by the defective borehole damaging the floor of the upper coal seam is determined, resulting in a first position, and the endpoint position of the height of the water-conducting fracture zone of the lower coal seam caused by the defective borehole is determined, resulting in a second position. The first position is the position reached by the defective borehole in damaging the bottom of the upper coal seam, and the second position is the position reached by the defective borehole in damaging the top of the lower coal seam; subsequently, based on the working condition information, the water flow data of each aquifer and each impermeable layer between the first and second positions is determined, including water flow velocity, water flow pressure, and head loss information; finally, based on the working condition information and the water flow data, the target water inflow of the defective borehole is determined. Compared to the problem of difficulty in quickly and accurately predicting coal mine water inflow in existing technologies, the method for determining the water inflow of defective boreholes in this application first obtains the working condition information of the defective borehole, then determines the first and second locations based on the working condition information. This allows for the determination of the location of cracks in the coal seam caused by the defective borehole, ensuring accurate identification of the water location. Furthermore, the method uses the working condition information to determine the water flow data at each level between the first and second locations. That is, based on the working condition information, the method determines the water flow data at each cross-section of the defective borehole, ensuring accurate and rapid determination of water flow velocity, pressure, and head loss at each location of the defective borehole. Finally, using the working condition information and the water flow data, the method determines the target water inflow of the defective borehole, ensuring high accuracy of the target water inflow and solving the problem of difficulty in quickly and accurately predicting coal mine water inflow in existing technologies.

[0042] In existing technologies, studies on the water conductivity of poorly sealed boreholes under coal mining disturbances often employ techniques such as fuzzy comprehensive analysis, artificial neural networks, analytic hierarchy process (AHP), pumping tests, tracer tests, and transient electromagnetic geophysical exploration to clarify the water conductivity of poorly sealed boreholes. These methods provide important evidence for the safe mining of coal resources. However, these methods often cannot directly obtain the water inflow of poorly sealed boreholes under coal mining disturbances, thus making it difficult to provide quantitative evidence for the prevention and control of water hazards in poorly sealed boreholes under the influence of goaf water accumulation, and hindering the provision of safety guarantees for coal mine water hazard prevention and control. The method for determining the water inflow of the aforementioned poorly sealed boreholes in this application can accurately determine the first and second locations based on the operating conditions of the area where the poorly sealed borehole is located, and then determine the water flow data between the first and second locations based on the operating conditions, thereby determining the target water inflow with higher accuracy.

[0043] To further ensure the accuracy of the target water inflow, based on the aforementioned operating condition information, the water flow data at the locations of each aquifer and each impermeable layer between the first and second locations is determined, including: acquiring initial water flow pressure information and initial water flow velocity information at the first location, wherein the initial water flow pressure information is p = ρgh, where h is the water depth in the upper coal seam, ρ is the water density, and g is the gravitational acceleration; and based on the aforementioned operating condition information, the initial water flow pressure information, and the initial water flow velocity information, determining the water flow data at the interface between the impermeable layer and the aquifer between the first and second locations, and determining the water flow data at the second location. By first confirming the initial water flow pressure information and the initial water flow velocity information at the first location, and since h in the initial water flow pressure information is the water depth in the upper coal seam, i.e., h is the water height at the first location, it is ensured that h not only considers the water height in the upper coal seam, but also the water accumulated in the cracks at the bottom of the upper coal seam caused by the poor drilling, thus ensuring that h is the actual water height in the upper coal seam. This ensures that the accuracy of the initial water flow pressure information determined based on h is high, the accuracy of the water flow data determined based on the initial water flow pressure information is high, and further ensures that the accuracy of the target water inflow is high.

[0044] It should be noted that h is the height of the water at the location of the first position mentioned above, which means that the water in the crack is taken into account.

[0045] In some embodiments, based on the aforementioned operating condition information, the aforementioned initial water flow pressure information, and the aforementioned initial water flow velocity information, the water flow data at the interface between the impermeable layer and the aquifer between the first position and the second position is determined, and the water flow data at the second position is determined, including: obtaining a first relational expression, a second relational expression, a third relational expression, and a fourth relational expression, wherein the first relational expression is... The second relation above is The third relation above is The fourth relation above is in, τ is used to characterize the shear stress of the borehole wall on the water flow in the aforementioned poorly drilled borehole. Z0 and Z1 represent the positional water head at the locations of two adjacent interfaces, with Z0 being the positional water head near the interface of the upper coal seam and Z1 being the positional water head near the interface of the lower coal seam. Both Z0 and Z1 can be represented by the distance between the interfaces and the first position. p0 is the pressure of the aquitard near the interface of the upper coal seam, p1 is the pressure of the aquitard near the interface of the lower coal seam, and p2 is the pressure of the aquifer near the interface of the lower coal seam. γ w For the specific gravity of water, v o v1 and v2 represent the water flow velocities at the locations of two adjacent interfaces described above, and v3 and v4 represent the water flow velocities at those locations. o v1 is the water flow velocity at the interface of the aquifer near the upper coal seam, v2 is the water flow velocity at the interface of the aquifer near the lower coal seam, and v3 is the water flow velocity at the interface of the aquifer near the lower coal seam. o And the same as v1, h y h represents the head loss during the process of water flowing through the aforementioned impermeable layer. yw The head loss during the flow of water through the aquifer is given by f, the drag coefficient is given by L and L2, the distance between two adjacent interfaces is given by d, the diameter of the faulty borehole is given by v, the water velocity in the faulty borehole is given by A, the cross-sectional area of ​​the faulty borehole is given by S, and the cross-sectional perimeter of the faulty borehole is given by S. Based on the first, second, third, and fourth relationships, the initial water pressure information, the initial water velocity information, and the operating condition information, the water flow data at the locations of each aquifer and each impermeable layer between the first and second positions are determined. By first obtaining the first, second, third, and fourth relationships mentioned above, accurate relationships between water flow velocity, water flow pressure, head loss, and the aforementioned operating condition information can be obtained. Then, by using the first, second, third, and fourth relationships, the initial water flow pressure information, the initial water flow velocity information, and the aforementioned operating condition information, the aforementioned water flow data is determined, further ensuring the high accuracy of the aforementioned water flow data and the high accuracy of the aforementioned target inflow.

[0046] In the above implementation process, the drag coefficient f is a parameter related to the Reynolds number Re of the water flow, where, Where η is the viscosity coefficient of water, according to Nikolaiz's experimental results, the relationship between Reynolds number Re and f can be divided into laminar flow region, laminar-turbulent transition region, turbulent smooth pipe region, turbulent transition region, and turbulent rough pipe region, and each region has a different semi-empirical formula for calculating the drag coefficient f. For laminar flow, when Reynolds number Re ≤ 2300, the drag coefficient f is f = Re / 64; when the Reynolds number is between 2300 and 3000, it is the transition region from laminar to turbulent flow, and there is no clear quantitative relationship between the drag coefficient f and the Reynolds number; for the turbulent smooth region, the drag coefficient f is often calculated using the explicit forms of the Blasius formula and the Prandtl-Shrichting formula.

[0047] To further ensure the accuracy of the target water inflow, the target water inflow of the defective borehole is determined based on the aforementioned operating condition information and water flow data. This includes: acquiring the first water flow velocity information at the second position in the aforementioned water flow data; and determining the target water inflow of the defective borehole as follows based on the aforementioned operating condition information and the aforementioned first water flow velocity information. Among them, v 终 The first water flow velocity information is mentioned above. Since the water flow data includes accurate first water flow velocity information at the second location, the target inflow rate is determined using the operating condition information and the first water flow velocity information. This further ensures the high accuracy of the aforementioned target water inflow.

[0048] In some embodiments, the water flow data at the locations of each aquifer and each impermeable layer between the first and second positions is determined based on the first, second, third, and fourth relationships, the initial water flow pressure information, the initial water flow velocity information, and the operating condition information. This includes: determining the first pressure information and the second water flow velocity information at the interface of the impermeable layer near the lower coal seam based on the first, second, initial water flow pressure information, initial water flow velocity information, and operating condition information; and determining the first head loss information of the impermeable layer based on the second relationship and the initial water flow velocity information. Furthermore, the second pressure information and the third water flow velocity information at the interface of the aquifer near the lower coal seam are determined based on the first, third, second water flow velocity information, and operating condition information; and the second head loss information of the aquifer is determined based on the second, third, and fourth relationships. Since the water at the interface of the aforementioned aquitard near the aforementioned lower coal seam is only affected by the water in the aforementioned poor borehole, but the water at the interface of the aforementioned aquifer near the aforementioned lower coal seam is affected not only by the water in the aforementioned poor borehole but also by the water in the aforementioned aquifer, that is, the water in the aforementioned aquifer also affects the water flow data at the interface of the aforementioned aquifer near the aforementioned lower coal seam, different formulas are used to obtain the water flow data under different circumstances. That is, based on the aforementioned first relationship, the aforementioned second relationship, the aforementioned initial water flow pressure information, the aforementioned initial water flow velocity information, and the aforementioned operating condition information, the aforementioned first pressure information and the aforementioned second water flow velocity information at the interface of the aforementioned aquitard near the aforementioned lower coal seam are determined, and the aquitard is determined based on the aforementioned second relationship and the aforementioned initial water flow velocity information. The first head loss information ensures the high accuracy of the aforementioned first pressure information, second flow velocity information, and first head loss information. Similarly, based on the aforementioned first relation, third relation, second flow velocity information, and operating condition information, the second pressure information and third flow velocity information of the interface of the aquifer near the lower coal seam are determined. Furthermore, based on the aforementioned second flow velocity information, third flow velocity information, and fourth relation, the second head loss information of the aquifer is determined, ensuring the high accuracy of the aforementioned second pressure information, third flow velocity information, and second head loss information. This ensures that the flow data between the aforementioned first and second positions can be accurately confirmed, further guaranteeing the high accuracy of the aforementioned flow data.

[0049] In the above implementation process, the water flow data of each cross section corresponding to the first position, the second position, the aquifer, and the water-proof layer are determined by the water flow data of the previous layer cross section. That is, starting from the cross section close to the upper coal seam, the water flow data of each layer is calculated layer by layer.

[0050] Among them, such as Figure 3 As shown, the upper coal seam 200, the first water-proof layer 300, the aquifer 400, the second water-proof layer 500, and the lower coal seam 600 are stacked sequentially. The defective borehole 100 connects the upper coal seam 200 and the lower coal seam 600, and the defective borehole 100 penetrates the first water-proof layer 300, the aquifer 400, and the second water-proof layer 500. L1 is the bottom surface of the upper coal seam, L2 is the first position, L3 and L4 are the upper and lower interfaces of the aquifer 400, L5 is the second position, and L6 is the top surface of the lower coal seam. The determination of the water flow data for each fault includes the following steps: First, calculate the initial water flow velocity v0 at the first location L2 and the drawdown corresponding to the expected water accumulation in the goaf, obtaining the first head drawdown s1. Simultaneously, determine the initial water flow pressure at the second location L2 as p0 = ρgh. Based on Bernoulli's equation, i.e., the first relationship, determine the pressure p1 at L3. Then, based on the second relationship, determine the head loss of the first aquitard 300. Based on the first and second relationships, since the borehole diameter remains constant along the borehole, v1 = First, the flow velocity v1 and pressure p1 at L3 are obtained, along with the head loss of water passing through the first aquifer 300. Second, the flow velocity v2 and pressure p2 at L4 are calculated, and the head loss of water passing through the aquifer 400 is determined. Using the flow velocity v1 and pressure p1 at L3, and substituting them into the third equation, combined with the first equation, the two unknowns and two equations, the flow velocity v2 and pressure p2 at L4 are obtained. Based on the fundamental equations of uniform flow and the Darcy-Weisbach equation, the expression for the shear stress can be obtained, where the velocity can be expressed as the average velocity. Based on the fourth relationship and v1 and v2, the head loss of water passing through the aquifer 400 is obtained. Thirdly, similarly, the water flow velocity v2 and pressure p2 at L4 can be substituted into the first relationship to obtain the pressure p3 at L5. Since the borehole diameter remains constant along the drilling path, the water flow velocity v3 = v2 at L5. Based on the second relationship, the head loss of the second aquifer 500 is obtained. The velocity, pressure and head loss data of all faults between the first position L2 and the second position L5 are calculated sequentially until the data position of the second position is obtained.

[0051] To verify the accuracy, validity, and reasonableness of the aforementioned flow data—that is, to verify the accuracy of the results of the aforementioned flow data—after determining the flow data for the locations of each aquifer and each impermeable layer between the first and second positions based on the aforementioned first, second, third, and fourth relationships, the aforementioned initial flow pressure information, the aforementioned initial flow velocity information, and the aforementioned operating condition information, the method further includes: obtaining a preset first head drawdown, the first head drawdown being used to characterize the expected depth of water level drop; and determining the second head drawdown between the first and second positions as follows based on the aforementioned operating condition information, multiple instances of first head loss information, multiple instances of second head loss information, the aforementioned first pressure information at the second position, and the aforementioned second flow velocity information at the second position. Wherein, v5 is the water flow velocity at the outlet of the aforementioned defective borehole, p5 is the water flow pressure at the outlet of the aforementioned defective borehole, and the aforementioned second head drawdown is used to characterize the theoretical depth of water level drop; when the difference between the aforementioned first head drawdown and the aforementioned second head drawdown is less than a predetermined value, it is determined that the aforementioned target inflow meets the predetermined requirements. Based on the aforementioned operating condition information, multiple instances of the aforementioned first head loss information, multiple instances of the aforementioned second head loss information, the aforementioned first pressure information at the aforementioned second position, and the aforementioned second water flow velocity information at the aforementioned second position, the aforementioned second head drawdown between the aforementioned first position and the aforementioned second position is determined, and when the difference between the aforementioned second head drawdown and the preset aforementioned first head drawdown is less than the aforementioned predetermined value, the accuracy of the aforementioned second head drawdown is ensured to be relatively high. Since the aforementioned second head drawdown is determined based on the aforementioned water flow data, the accuracy of the aforementioned water flow data is further ensured to be relatively high.

[0052] It should be noted that v5 and p5 represent the water flow velocity and pressure at the second position mentioned above.

[0053] In the above implementation process, if the accuracy of the first and second water head drawdowns is less than 5%, it indicates that the assumed water flow velocity at the first location (i.e., the initial water flow velocity information) and the first water head drawdown are accurate. This further demonstrates that the determined water flow velocity at the second location is effective and reasonable. This provides a solid foundation for grouting treatment of poorly sealed boreholes, ensuring the safe mining of coal resources.

[0054] In some embodiments, based on the aforementioned working condition information, determining the endpoint position of the crack caused by the defective borehole damaging the floor of the upper coal seam, thus obtaining a first position, and determining the endpoint position of the development height of the water-conducting fracture zone of the lower coal seam caused by the defective borehole, thus obtaining a second position, includes: acquiring a predetermined model, which is trained using multiple sets of predetermined data through machine learning, each set of predetermined data including historical working condition information and corresponding first and second historical positions; inputting the aforementioned working condition information into the predetermined model to obtain the first and second positions corresponding to the defective borehole. By first acquiring the predetermined model, since the predetermined model is trained using multiple sets of predetermined data through machine learning, the accuracy of the predetermined model is ensured to be high. Inputting the aforementioned working condition information into the predetermined model ensures the high accuracy of the obtained first and second positions. Furthermore, since the target water inflow is determined based on the water flow data of each fault corresponding to the first and second positions, the accuracy of the target water inflow is further ensured to be high.

[0055] In the above implementation process, determining the first and second locations specifically includes the following steps: First, dividing the rock strata into groups. Based on the working face and the comprehensive geological columnar section of the mining area (hydrogeology), as well as exploration data from poorly sealed boreholes, and according to the principle of rock strata similarity, delineating the roof and floor rock strata groups for each working face of the upper and lower coal seams, including the poorly sealed borehole groups; Second, constructing a numerical model, i.e., the aforementioned predetermined model. Based on finite difference numerical simulation software or discrete element numerical simulation software, and combining the rock strata groups and the physical and mechanical parameters of each group, constructing a numerical model of the mining conduction height and floor failure depth of the upper and lower coal seams under the influence of poorly sealed boreholes; Third... The upper and lower coal seams are mined separately. Based on the length and width of the mining face and the actual mining conditions, the upper coal seam is mined first, followed by the lower coal seam. Considering the model boundary effect, a distance of 50-80m is generally left between the working face boundary of the upper and lower coal seams and the corresponding model boundary. Fourth, the guide height and floor failure depth are determined. After the upper and lower coal seams are mined, the guide height and floor failure depth under the influence of boreholes are obtained along the strike and dip of the working face, respectively. The average value of the strike and dip values ​​of the working face is taken as the guide height and floor failure depth after the mining of the coal seam, thus obtaining the location of the first and second positions mentioned above.

[0056] In addition, after determining the first location and the second location, the following process is also included: combining the columnar section of the poorly sealed borehole and the hydrogeological columnar section of the working face, the location of the upper and lower rock strata interface of the aquifer and the impermeable layer involved in the poorly sealed borehole profile section between the first location and the second location is determined, which is the location and number of borehole loss sections along the borehole profile section.

[0057] In the specific implementation process, the exploration data information of the aforementioned defective boreholes includes the columnar section information and borehole diameter information of the defective boreholes. The engineering geological condition information includes at least the spatial location, thickness, and physical and mechanical parameters of the defective boreholes, the upper coal seam, the aquifer, the aquitard, and the lower coal seam. Because the exploration data information of the defective boreholes includes the columnar section information and borehole diameter, and the engineering geological condition information includes various geological information between the defective boreholes, the upper coal seam, the aquifer, the aquitard, and the lower coal seam, the accuracy of the first location, the second location, and the water flow data determined based on the aforementioned working condition information is relatively high, further ensuring the high accuracy of the target water inflow.

[0058] In some embodiments, both the upper coal seam and the lower coal seam are in contact with the aquifer, and the aquifer is located between two adjacent aquifers.

[0059] To enable those skilled in the art to better understand the technical solution of this application, the implementation process of the method for determining the water inflow of poor boreholes in this application will be described in detail below with reference to specific embodiments.

[0060] This embodiment relates to a specific method for determining the water inflow of an undesirable borehole, including the following steps:

[0061] Step S1: Obtain the working condition information of the area where the aforementioned defective borehole is located. The working condition information includes the exploration data information of the aforementioned defective borehole and the engineering geological conditions information of the aforementioned area.

[0062] Step S2: Based on the above working condition information, determine the endpoint position of the crack caused by the failure of the borehole to the bottom plate of the upper coal seam, and obtain the first position; and determine the endpoint position of the development height of the water-conducting fracture zone of the lower coal seam caused by the failure of the borehole, and obtain the second position. The first position is the position reached by the failure of the borehole to the bottom of the upper coal seam, and the second position is the position reached by the failure of the borehole to the top of the lower coal seam.

[0063] Step S3: Combining the columnar section of the poorly sealed borehole and the hydrogeological columnar section of the working face, determine the position of the upper and lower rock strata interface of the aquifer and the impermeable layer involved in the poorly sealed borehole profile section between the first position and the second position. This is the position and number of borehole loss sections along the borehole profile section.

[0064] Step S4: Based on the above working condition information, determine the water flow data of each of the above-mentioned aquifers and the above-mentioned impermeable layers between the first position and the second position. The water flow data includes water flow velocity information, water flow pressure information and head loss information.

[0065] Step S5: Obtain a preset first head drawdown, which is used to characterize the expected depth of water level drop;

[0066] Step S6: Based on the aforementioned operating condition information, multiple sets of first head loss information, multiple sets of second head loss information, the first pressure information at the second location, and the second flow velocity information at the second location, determine the second head drawdown between the first location and the second location as follows: Where v5 is the water flow velocity at the outlet of the aforementioned defective borehole, p5 is the water flow pressure at the outlet of the aforementioned defective borehole, and the aforementioned second head drawdown is used to characterize the theoretical depth of water level drop.

[0067] Step S7: If the difference between the first head drawdown and the second head drawdown is less than a predetermined value, it is determined that the target inflow meets the predetermined requirements.

[0068] Step S8: Based on the above operating condition information and the above first water flow velocity information, determine the target water inflow of the above-mentioned defective borehole as follows: Among them, v 终 This refers to the first water flow velocity information mentioned above.

[0069] This application also provides a device for determining the water inflow of a faulty borehole. The faulty borehole connects an upper coal seam and a lower coal seam, and there are multiple aquifers and multiple water-resistant layers between the upper coal seam and the lower coal seam. It should be noted that the device for determining the water inflow of a faulty borehole in this application can be used to execute the method for determining the water inflow of a faulty borehole provided in this application.

[0070] This device is used to implement the above embodiments and preferred embodiments, and details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0071] The following describes the apparatus for determining the water inflow of undesirable boreholes provided in the embodiments of this application.

[0072] Figure 4 This is a schematic diagram of a device for determining the amount of water flowing into a faulty borehole according to an embodiment of this application. Figure 4As shown, the device includes a first acquisition unit 10, a first determination unit 20, a second determination unit 30, and a third determination unit 40, wherein,

[0073] The first acquisition unit 10 is used to acquire working condition information of the area where the defective borehole is located. The working condition information includes exploration data information of the defective borehole and engineering geological condition information of the area.

[0074] Specifically, the aforementioned defective boreholes are closed defective boreholes. The aforementioned working condition information specifically includes a columnar section of the closed defective borehole, the borehole diameter of the closed defective borehole, a comprehensive columnar section of the working face and the mining area (hydrogeology), the spatial relationship between the closed defective borehole in the coal mining face and the water accumulation in the goaf of the upper coal group, the mining thickness of the aforementioned upper coal group and the aforementioned lower coal group, the slope length of the working face of the aforementioned upper coal group and the aforementioned lower coal group, and the physical and mechanical parameters of the roof and floor strata of the working face of the aforementioned upper coal group and the aforementioned lower coal group.

[0075] The first determining unit 20 is used to determine, based on the above working condition information, the endpoint position of the crack caused by the failure of the borehole to the bottom plate of the upper coal seam, to obtain a first position, and to determine the endpoint position of the development height of the water-conducting fracture zone of the lower coal seam caused by the failure of the borehole, to obtain a second position. The first position is the position reached by the failure of the borehole to the bottom of the upper coal seam, and the second position is the position reached by the failure of the borehole to the top of the lower coal seam.

[0076] Specifically, the first position mentioned above refers to the situation where, due to the poor drilling, cracks appear in the bottom plate of the coal seam, and water accumulates at the cracks. In other words, the actual height of the water in the upper coal seam is not only the height of the water in the upper coal seam, but also includes the water present due to the cracks. That is to say, the first position mentioned above is the actual bottom position of the water in the upper coal seam. Similarly, the second position mentioned above also refers to the situation where, due to the poor drilling, cracks appear at the top of the lower coal seam, causing water to accumulate. In other words, the second position mentioned above is the actual height that the water in the lower coal seam can reach.

[0077] The second determining unit 30 is used to determine the water flow data of each of the aquifers and each of the impermeable layers between the first position and the second position based on the above working condition information. The water flow data includes water flow velocity information, water flow pressure information and head loss information.

[0078] Specifically, the aforementioned water flow data includes the water flow data at the first position, the second position, and each cross-sectional position between the first position and the second position. The water flow data of the aquifer and the impermeable layer actually includes the water flow data of the upper and lower surfaces of each layer.

[0079] The third determining unit 40 is used to determine the target water inflow of the defective borehole based on the above-mentioned working condition information and water flow data.

[0080] Specifically, the aforementioned water inflow actually refers to the amount of water accumulated in the upper coal seam that flows into the lower coal seam through the aforementioned defective borehole, and water from the aquifer also flows into the aforementioned defective borehole.

[0081] In the aforementioned device for determining the water inflow of a faulty borehole, the first acquisition unit acquires the working condition information of the area where the faulty borehole is located, including exploration data of the faulty borehole and engineering geological conditions of the area. Based on the working condition information, the first determination unit determines the endpoint of the faulty borehole causing cracks in the floor of the upper coal seam, obtaining a first position, and determines the endpoint of the water-conducting fracture zone development height of the lower coal seam, obtaining a second position. The first position is the location where the faulty borehole reaches the bottom of the upper coal seam after causing damage, and the second position is the location where the faulty borehole reaches the top of the lower coal seam after causing damage. Based on the working condition information, the second determination unit determines the water flow data of each aquifer and each impermeable layer between the first and second positions, including water flow velocity, water flow pressure, and head loss. Based on the working condition information and the water flow data, the third determination unit determines the target water inflow of the faulty borehole. Compared to the problem of difficulty in quickly and accurately predicting coal mine water inflow in existing technologies, the device for determining the water inflow of defective boreholes in this application first acquires the operating condition information of the defective borehole, then determines the first and second locations based on the operating condition information. This allows for the determination of the location of cracks in the coal seam caused by the defective borehole, ensuring accurate identification of the water's location. Furthermore, the device determines the water flow data at each level between the first and second locations based on the operating condition information. That is, it determines the water flow data at each cross-section of the defective borehole based on the operating condition information, ensuring accurate and rapid determination of water flow velocity, pressure, and head loss at each location of the defective borehole. Finally, using the operating condition information and the water flow data, the device determines the target water inflow of the defective borehole, ensuring high accuracy of the target water inflow and solving the problem of difficulty in quickly and accurately predicting coal mine water inflow in existing technologies.

[0082] In existing technologies, studies on the water conductivity of poorly sealed boreholes under coal mining disturbances often employ techniques such as fuzzy comprehensive analysis, artificial neural networks, analytic hierarchy process (AHP), pumping tests, tracer tests, and transient electromagnetic geophysical exploration to clarify the water conductivity of poorly sealed boreholes. These methods provide important evidence for the safe mining of coal resources. However, these methods often cannot directly obtain the water inflow of poorly sealed boreholes under coal mining disturbances, thus making it difficult to provide quantitative evidence for the prevention and control of water hazards in poorly sealed boreholes under the influence of goaf water accumulation, and hindering the provision of safety guarantees for coal mine water hazard prevention and control. The method for determining the water inflow of the aforementioned poorly sealed boreholes in this application can accurately determine the first and second locations based on the operating conditions of the area where the poorly sealed borehole is located, and then determine the water flow data between the first and second locations based on the operating conditions, thereby determining the target water inflow with higher accuracy.

[0083] To further ensure the accuracy of the target water inflow, the second determining unit includes a first acquisition module and a first determining module. The first acquisition module is used to acquire the initial water flow pressure information and the initial water flow velocity information at the first location. The initial water flow pressure information is p = ρgh, where h is the water depth in the upper coal seam, ρ is the water density, and g is the gravitational acceleration. The first determining module is used to determine the water flow data at the interface between the aquifer and the aquifer between the first and second locations based on the operating condition information, the initial water flow pressure information, and the initial water flow velocity information, and to determine the water flow data at the second location. By first confirming the initial water flow pressure information and the initial water flow velocity information at the first location, and since h in the initial water flow pressure information is the water depth in the upper coal seam, i.e., h is the water height at the first location, it is ensured that h not only considers the water height in the upper coal seam, but also the water accumulated in the cracks at the bottom of the upper coal seam caused by the poor drilling, thus ensuring that h is the actual water height in the upper coal seam. This ensures that the accuracy of the initial water flow pressure information determined based on h is high, the accuracy of the water flow data determined based on the initial water flow pressure information is high, and further ensures that the accuracy of the target water inflow is high.

[0084] It should be noted that h is the height of the water at the location of the first position mentioned above, which means that the water in the crack is taken into account.

[0085] In some embodiments, the first determining module includes an acquisition submodule and a determining submodule, wherein the acquisition submodule is used to acquire a first relation, a second relation, a third relation, and a fourth relation, and the first relation is... The second relation above is The third relation above is The fourth relation above is in, τ is used to characterize the shear stress of the borehole wall on the water flow in the aforementioned poorly drilled borehole. Z0 and Z1 represent the positional water head at the locations of two adjacent interfaces, with Z0 being the positional water head near the interface of the upper coal seam and Z1 being the positional water head near the interface of the lower coal seam. Both Z0 and Z1 can be represented by the distance between the interfaces and the first position. p0 is the pressure of the aquitard near the interface of the upper coal seam, p1 is the pressure of the aquitard near the interface of the lower coal seam, and p2 is the pressure of the aquifer near the interface of the lower coal seam. γ w For the specific gravity of water, v o v1 and v2 represent the water flow velocities at the locations of two adjacent interfaces described above, and v3 and v4 represent the water flow velocities at those locations. o v1 is the water flow velocity at the interface of the aquifer near the upper coal seam, v2 is the water flow velocity at the interface of the aquifer near the lower coal seam, and v3 is the water flow velocity at the interface of the aquifer near the lower coal seam. o And the same as v1, h y h represents the head loss during the process of water flowing through the aforementioned impermeable layer. yw The above-mentioned head loss during the process of water flowing through the above-mentioned aquifer, f is the drag coefficient, L and L2 are the distance between two adjacent interfaces, d is the diameter of the above-mentioned faulty borehole, v is the water flow velocity in the above-mentioned faulty borehole, A is the cross-sectional area of ​​the above-mentioned faulty borehole, and S is the cross-sectional perimeter of the above-mentioned faulty borehole; the above-mentioned determining submodule is used to determine the water flow data of the locations of each of the above-mentioned aquifers and each of the above-mentioned impermeable layers between the above-mentioned first position and the above-mentioned second position based on the above-mentioned first relationship, the above-mentioned second relationship, the above-mentioned third relationship, the above-mentioned fourth relationship, the above-mentioned initial water flow pressure information, the above-mentioned initial water flow velocity information, and the above-mentioned operating condition information. By first obtaining the first, second, third, and fourth relationships mentioned above, accurate relationships between water flow velocity, water flow pressure, head loss, and the aforementioned operating condition information can be obtained. Then, by using the first, second, third, and fourth relationships, the initial water flow pressure information, the initial water flow velocity information, and the aforementioned operating condition information, the aforementioned water flow data is determined, further ensuring the high accuracy of the aforementioned water flow data and the high accuracy of the aforementioned target inflow.

[0086] In the above implementation process, the drag coefficient f is a parameter related to the Reynolds number Re of the water flow, where, Where η is the viscosity coefficient of water, according to Nikolaiz's experimental results, the relationship between Reynolds number Re and f can be divided into laminar flow region, laminar-turbulent transition region, turbulent smooth pipe region, turbulent transition region, and turbulent rough pipe region, and each region has a different semi-empirical formula for calculating the drag coefficient f. For laminar flow, when Reynolds number Re ≤ 2300, the drag coefficient f is f = Re / 64; when the Reynolds number is between 2300 and 3000, it is the transition region from laminar to turbulent flow, and there is no clear quantitative relationship between the drag coefficient f and the Reynolds number; for the turbulent smooth region, the drag coefficient f is often calculated using the explicit forms of the Blasius formula and the Prandtl-Shrichting formula.

[0087] To further ensure the accuracy of the target water inflow, the third determining unit includes a second acquisition module and a second determining module. The second acquisition module acquires the first water flow velocity information at the second location in the water flow data. The second determining module determines the target water inflow of the defective borehole based on the operating condition information and the first water flow velocity information. Among them, v 终 The first water flow velocity information is mentioned above. Since the water flow data includes accurate first water flow velocity information at the second location, the target inflow rate is determined using the operating condition information and the first water flow velocity information. This further ensures the high accuracy of the aforementioned target water inflow.

[0088] In some embodiments, the aforementioned determining submodule includes: determining, based on the first relation, the second relation, the initial water flow pressure information, the initial water flow velocity information, and the operating condition information, a first pressure information and a second water flow velocity information at the interface of the aquitard near the lower coal seam; and determining, based on the second relation and the initial water flow velocity information, a first head loss information of the aquitard; and determining, based on the first relation, the third relation, the second water flow velocity information, and the operating condition information, a second pressure information and a third water flow velocity information at the interface of the aquifer near the lower coal seam; and determining, based on the second water flow velocity information, the third water flow velocity information, and the fourth relation, a second head loss information of the aquifer. Since the water at the interface of the aforementioned aquitard near the aforementioned lower coal seam is only affected by the water in the aforementioned poor borehole, but the water at the interface of the aforementioned aquifer near the aforementioned lower coal seam is affected not only by the water in the aforementioned poor borehole but also by the water in the aforementioned aquifer, that is, the water in the aforementioned aquifer also affects the water flow data at the interface of the aforementioned aquifer near the aforementioned lower coal seam, different formulas are used to obtain the water flow data under different circumstances. That is, based on the aforementioned first relationship, the aforementioned second relationship, the aforementioned initial water flow pressure information, the aforementioned initial water flow velocity information, and the aforementioned operating condition information, the aforementioned first pressure information and the aforementioned second water flow velocity information at the interface of the aforementioned aquitard near the aforementioned lower coal seam are determined, and the aquitard is determined based on the aforementioned second relationship and the aforementioned initial water flow velocity information. The first head loss information ensures the high accuracy of the aforementioned first pressure information, second flow velocity information, and first head loss information. Similarly, based on the aforementioned first relation, third relation, second flow velocity information, and operating condition information, the second pressure information and third flow velocity information of the interface of the aquifer near the lower coal seam are determined. Furthermore, based on the aforementioned second flow velocity information, third flow velocity information, and fourth relation, the second head loss information of the aquifer is determined, ensuring the high accuracy of the aforementioned second pressure information, third flow velocity information, and second head loss information. This ensures that the flow data between the aforementioned first and second positions can be accurately confirmed, further guaranteeing the high accuracy of the aforementioned flow data.

[0089] In the above implementation process, the water flow data of each cross section corresponding to the first position, the second position, the aquifer, and the water-proof layer are determined by the water flow data of the previous layer cross section. That is, starting from the cross section close to the upper coal seam, the water flow data of each layer is calculated layer by layer.

[0090] Among them, such as Figure 3 As shown, the upper coal seam 200, the first water-proof layer 300, the aquifer 400, the second water-proof layer 500, and the lower coal seam 600 are stacked sequentially. The defective borehole 100 connects the upper coal seam 200 and the lower coal seam 600, and the defective borehole 100 penetrates the first water-proof layer 300, the aquifer 400, and the second water-proof layer 500. L1 is the bottom surface of the upper coal seam, L2 is the first position, L3 and L4 are the upper and lower interfaces of the aquifer 400, L5 is the second position, and L6 is the top surface of the lower coal seam. The determination of the water flow data for each fault includes the following steps: First, calculate the initial water flow velocity v0 at the first location L2 and the drawdown corresponding to the expected water accumulation in the goaf, obtaining the first head drawdown s1. Simultaneously, determine the initial water flow pressure at the second location L2 as p0 = ρgh. Based on Bernoulli's equation, i.e., the first relationship, determine the pressure p1 at L3. Then, based on the second relationship, determine the head loss of the first aquitard 300. Based on the first and second relationships, since the borehole diameter remains constant along the borehole, v1 = First, the flow velocity v1 and pressure p1 at L3 are obtained, along with the head loss of water passing through the first aquifer 300. Second, the flow velocity v2 and pressure p2 at L4 are calculated, and the head loss of water passing through the aquifer 400 is determined. Using the flow velocity v1 and pressure p1 at L3, and substituting them into the third equation, combined with the first equation, the two unknowns and two equations, the flow velocity v2 and pressure p2 at L4 are obtained. Based on the fundamental equations of uniform flow and the Darcy-Weisbach equation, the expression for the shear stress can be obtained, where the velocity can be expressed as the average velocity. Based on the fourth relationship and v1 and v2, the head loss of water passing through the aquifer 400 is obtained. Thirdly, similarly, the water flow velocity v2 and pressure p2 at L4 can be substituted into the first relationship to obtain the pressure p3 at L5. Since the borehole diameter remains constant along the drilling path, the water flow velocity v3 = v2 at L5. Based on the second relationship, the head loss of the second aquifer 500 is obtained. The velocity, pressure and head loss data of all faults between the first position L2 and the second position L5 are calculated sequentially until the data position of the second position is obtained.

[0091] To verify the accuracy and validity of the aforementioned water flow data, i.e., to confirm the accuracy of the results of the aforementioned water flow data, the device further includes a second acquisition unit, a fourth determination unit, and a fifth determination unit. The second acquisition unit, after determining the water flow data for the locations of each aquifer and each impermeable layer between the first and second positions based on the first, second, third, and fourth relational expressions, the initial water flow pressure information, the initial water flow velocity information, and the operating condition information, acquires a preset first head drawdown, which characterizes the expected depth of water level drop. The fourth determination unit, based on the operating condition information, multiple sets of first head loss information, multiple sets of second head loss information, the first pressure information at the second position, and the second water flow velocity information at the second position, determines the second head drawdown between the first and second positions as follows: Wherein, v5 is the water flow velocity at the outlet of the aforementioned defective borehole, p5 is the water flow pressure at the outlet of the aforementioned defective borehole, and the aforementioned second head drawdown is used to characterize the theoretical depth of water level drop; the aforementioned fifth determining unit is used to determine that the aforementioned target inflow meets the predetermined requirements when the difference between the aforementioned first head drawdown and the aforementioned second head drawdown is less than a predetermined value. Based on the aforementioned operating condition information, multiple instances of the aforementioned first head loss information, multiple instances of the aforementioned second head loss information, the aforementioned first pressure information at the aforementioned second position, and the aforementioned second water flow velocity information at the aforementioned second position, the aforementioned second head drawdown between the aforementioned first position and the aforementioned second position is determined, and when the difference between the aforementioned second head drawdown and the preset aforementioned first head drawdown is less than the aforementioned predetermined value, the accuracy of the aforementioned second head drawdown is ensured to be high. Since the aforementioned second head drawdown is determined based on the aforementioned water flow data, the accuracy of the aforementioned water flow data is further ensured to be high.

[0092] It should be noted that v5 and p5 represent the water flow velocity and pressure at the second position mentioned above.

[0093] In the above implementation process, if the accuracy of the first and second water head drawdowns is less than 5%, it indicates that the assumed water flow velocity at the first location (i.e., the initial water flow velocity information) and the first water head drawdown are accurate. This further demonstrates that the determined water flow velocity at the second location is effective and reasonable. This provides a solid foundation for grouting treatment of poorly sealed boreholes, ensuring the safe mining of coal resources.

[0094] In some embodiments, the first determining unit includes a third acquisition module and an input module. The third acquisition module is used to acquire a predetermined model, which is trained using multiple sets of predetermined data through machine learning. Each set of predetermined data includes historical working condition information and corresponding first and second historical positions. The input module is used to input the working condition information into the predetermined model to obtain the first and second positions corresponding to the defective borehole. By first acquiring the predetermined model, which is trained using multiple sets of predetermined data through machine learning, the accuracy of the predetermined model is ensured. Inputting the working condition information into the predetermined model ensures the accuracy of the obtained first and second positions. Since the target water inflow is determined based on the water flow data of each fault corresponding to the first and second positions, the accuracy of the target water inflow is further ensured.

[0095] In the above implementation process, determining the first and second locations specifically includes the following steps: First, dividing the rock strata into groups. Based on the working face and the comprehensive geological columnar section of the mining area (hydrogeology), as well as exploration data from poorly sealed boreholes, and according to the principle of rock strata similarity, delineating the roof and floor rock strata groups for each working face of the upper and lower coal seams, including the poorly sealed borehole groups; Second, constructing a numerical model, i.e., the aforementioned predetermined model. Based on finite difference numerical simulation software or discrete element numerical simulation software, and combining the rock strata groups and the physical and mechanical parameters of each group, constructing a numerical model of the mining conduction height and floor failure depth of the upper and lower coal seams under the influence of poorly sealed boreholes; Third... The upper and lower coal seams are mined separately. Based on the length and width of the mining face and the actual mining conditions, the upper coal seam is mined first, followed by the lower coal seam. Considering the model boundary effect, a distance of 50-80m is generally left between the working face boundary of the upper and lower coal seams and the corresponding model boundary. Fourth, the guide height and floor failure depth are determined. After the upper and lower coal seams are mined, the guide height and floor failure depth under the influence of boreholes are obtained along the strike and dip of the working face, respectively. The average value of the strike and dip values ​​of the working face is taken as the guide height and floor failure depth after the mining of the coal seam, thus obtaining the location of the first and second positions mentioned above.

[0096] In addition, after determining the first location and the second location, the following process is also included: combining the columnar section of the poorly sealed borehole and the hydrogeological columnar section of the working face, the location of the upper and lower rock strata interface of the aquifer and the impermeable layer involved in the poorly sealed borehole profile section between the first location and the second location is determined, which is the location and number of borehole loss sections along the borehole profile section.

[0097] In the specific implementation process, the exploration data information of the aforementioned defective boreholes includes the columnar section information and borehole diameter information of the defective boreholes. The engineering geological condition information includes at least the spatial location, thickness, and physical and mechanical parameters of the defective boreholes, the upper coal seam, the aquifer, the aquitard, and the lower coal seam. Because the exploration data information of the defective boreholes includes the columnar section information and borehole diameter, and the engineering geological condition information includes various geological information between the defective boreholes, the upper coal seam, the aquifer, the aquitard, and the lower coal seam, the accuracy of the first location, the second location, and the water flow data determined based on the aforementioned working condition information is relatively high, further ensuring the high accuracy of the target water inflow.

[0098] In some embodiments, both the upper coal seam and the lower coal seam are in contact with the aquifer, and the aquifer is located between two adjacent aquifers.

[0099] The aforementioned device for determining the water inflow from defective boreholes includes a processor and a memory. The first acquisition unit, the first determination unit, the second determination unit, and the third determination unit are all stored as program units in the memory. The processor executes these program units stored in the memory to achieve their respective functions. All of the aforementioned modules are located in the same processor; alternatively, the modules may be located in different processors in any combination.

[0100] The processor contains a kernel, which retrieves the corresponding program units from memory. One or more kernels can be configured, and adjusting kernel parameters can address the problem of the difficulty in quickly and accurately predicting coal mine water inflow in existing technologies.

[0101] The memory may include non-permanent memory in computer-readable media, such as 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.

[0102] This invention provides a computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device containing the computer-readable storage medium to perform the method for determining the amount of water flowing in a faulty borehole.

[0103] Specifically, the methods for determining the aforementioned undesirable borehole water inflow include:

[0104] Step S201: Obtain the working condition information of the area where the aforementioned defective borehole is located. The working condition information includes the exploration data information of the aforementioned defective borehole and the engineering geological conditions information of the aforementioned area.

[0105] Step S202: Based on the above working condition information, determine the endpoint position of the crack caused by the failure of the borehole to the bottom plate of the upper coal seam, and obtain the first position; and determine the endpoint position of the development height of the water-conducting fracture zone of the lower coal seam caused by the failure of the borehole, and obtain the second position. The first position is the position reached by the failure of the borehole to the bottom of the upper coal seam, and the second position is the position reached by the failure of the borehole to the top of the lower coal seam.

[0106] Step S203: Based on the above working condition information, determine the water flow data of each of the above-mentioned aquifers and the above-mentioned impermeable layers between the first position and the second position. The water flow data includes water flow velocity information, water flow pressure information and head loss information.

[0107] Step S204: Based on the above operating condition information and the above water flow data, determine the target water inflow of the above-mentioned defective borehole.

[0108] This invention provides a processor for running a program, wherein the program executes the method for determining the water inflow of undesirable boreholes.

[0109] Specifically, the methods for determining the aforementioned undesirable borehole water inflow include:

[0110] Step S201: Obtain the working condition information of the area where the aforementioned defective borehole is located. The working condition information includes the exploration data information of the aforementioned defective borehole and the engineering geological conditions information of the aforementioned area.

[0111] Step S202: Based on the above working condition information, determine the endpoint position of the crack caused by the failure of the borehole to the bottom plate of the upper coal seam, and obtain the first position; and determine the endpoint position of the development height of the water-conducting fracture zone of the lower coal seam caused by the failure of the borehole, and obtain the second position. The first position is the position reached by the failure of the borehole to the bottom of the upper coal seam, and the second position is the position reached by the failure of the borehole to the top of the lower coal seam.

[0112] Step S203: Based on the above working condition information, determine the water flow data of each of the above-mentioned aquifers and the above-mentioned impermeable layers between the first position and the second position. The water flow data includes water flow velocity information, water flow pressure information and head loss information.

[0113] Step S204: Based on the above operating condition information and the above water flow data, determine the target water inflow of the above-mentioned defective borehole.

[0114] This invention provides a device including a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs at least the following steps:

[0115] Step S201: Obtain the working condition information of the area where the aforementioned defective borehole is located. The working condition information includes the exploration data information of the aforementioned defective borehole and the engineering geological conditions information of the aforementioned area.

[0116] Step S202: Based on the above working condition information, determine the endpoint position of the crack caused by the failure of the borehole to the bottom plate of the upper coal seam, and obtain the first position; and determine the endpoint position of the development height of the water-conducting fracture zone of the lower coal seam caused by the failure of the borehole, and obtain the second position. The first position is the position reached by the failure of the borehole to the bottom of the upper coal seam, and the second position is the position reached by the failure of the borehole to the top of the lower coal seam.

[0117] Step S203: Based on the above working condition information, determine the water flow data of each of the above-mentioned aquifers and the above-mentioned impermeable layers between the first position and the second position. The water flow data includes water flow velocity information, water flow pressure information and head loss information.

[0118] Step S204: Based on the above operating condition information and the above water flow data, determine the target water inflow of the above-mentioned defective borehole.

[0119] The devices mentioned in this article can be servers, PCs, tablets, mobile phones, etc.

[0120] This application also provides a computer program product, which, when executed on a data processing device, is suitable for executing an initialization program having at least the following method steps:

[0121] Step S201: Obtain the working condition information of the area where the aforementioned defective borehole is located. The working condition information includes the exploration data information of the aforementioned defective borehole and the engineering geological conditions information of the aforementioned area.

[0122] Step S202: Based on the above working condition information, determine the endpoint position of the crack caused by the failure of the borehole to the bottom plate of the upper coal seam, and obtain the first position; and determine the endpoint position of the development height of the water-conducting fracture zone of the lower coal seam caused by the failure of the borehole, and obtain the second position. The first position is the position reached by the failure of the borehole to the bottom of the upper coal seam, and the second position is the position reached by the failure of the borehole to the top of the lower coal seam.

[0123] Step S203: Based on the above working condition information, determine the water flow data of each of the above-mentioned aquifers and the above-mentioned impermeable layers between the first position and the second position. The water flow data includes water flow velocity information, water flow pressure information and head loss information.

[0124] Step S204: Based on the above operating condition information and the above water flow data, determine the target water inflow of the above-mentioned defective borehole.

[0125] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those described herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0126] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0127] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0128] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0129] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0130] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0131] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0132] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, 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 technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0133] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0134] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0135] In the method for determining the water inflow of the aforementioned defective borehole in this application, firstly, the working condition information of the area where the defective borehole is located is obtained, including exploration data of the defective borehole and engineering geological conditions of the area; then, based on the working condition information, the endpoint position of the crack caused by the defective borehole damaging the floor of the upper coal seam is determined, resulting in a first position, and the endpoint position of the height of the water-conducting fracture zone of the lower coal seam caused by the defective borehole is determined, resulting in a second position. The first position is the position reached by the defective borehole in damaging the bottom of the upper coal seam, and the second position is the position reached by the defective borehole in damaging the top of the lower coal seam; subsequently, based on the working condition information, the water flow data of each aquifer and each impermeable layer between the first and second positions is determined, including water flow velocity information, water flow pressure information, and head loss information; finally, based on the working condition information and the water flow data, the target water inflow of the defective borehole is determined. Compared to the problem of difficulty in quickly and accurately predicting coal mine water inflow in existing technologies, the method for determining the water inflow of defective boreholes in this application first obtains the working condition information of the defective borehole, then determines the first and second locations based on the working condition information. This allows for the determination of the location of cracks in the coal seam caused by the defective borehole, ensuring accurate identification of the water location. Furthermore, the method uses the working condition information to determine the water flow data at each level between the first and second locations. That is, based on the working condition information, the method determines the water flow data at each cross-section of the defective borehole, ensuring accurate and rapid determination of water flow velocity, pressure, and head loss at each location of the defective borehole. Finally, using the working condition information and the water flow data, the method determines the target water inflow of the defective borehole, ensuring high accuracy of the target water inflow and solving the problem of difficulty in quickly and accurately predicting coal mine water inflow in existing technologies.

[0136] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method of determining a bad hole flow rate, characterized by, The method comprises the following steps: obtaining the working condition information of the area where the poor drilling is located, the working condition information including the exploration data information of the poor drilling and the engineering geological condition information of the area; determining the endpoint position of the crack caused by the damage of the poor drilling to the floor of the upper group of coal seams according to the working condition information, obtaining the first position, and determining the endpoint position of the development height of the water flowing fractured zone of the lower group of coal seams caused by the poor drilling, obtaining the second position, the first position being the position reached by the damage of the poor drilling to the bottom of the upper group of coal seams, and the second position being the position reached by the damage of the poor drilling to the top of the lower group of coal seams; determining the water flow data of the positions of each aquifer and each aquifuge between the first position and the second position according to the working condition information, the water flow data including water flow velocity information, water flow pressure information and water head loss information; determining the target water inflow of the poor drilling according to the working condition information and the water flow data; determining the water flow data of the positions of each aquifer and each aquifuge between the first position and the second position, including: obtaining the initial water flow pressure information and the initial water flow velocity information of the first position, the initial water flow pressure information being p = ρgh, wherein h is the depth of water in the upper group of coal seams, ρ is the density of water, and g is the acceleration of gravity; determining the water flow data of the interface between the aquifuge and the aquifer between the first position and the second position according to the working condition information, the initial water flow pressure information and the initial water flow velocity information, and determining the water flow data of the second position; According to the working condition information, the initial water flow pressure information and the initial water flow velocity information, the water flow data of the interface between the aquifuge and the aquifer between the first position and the second position is determined, and the water flow data of the second position is determined, comprising: obtaining a first relationship, a second relationship, a third relationship and a fourth relationship, the first relationship is , the second relationship is , the third relationship is , and the fourth relationship is , wherein , τ is used to represent the shear stress of the borehole wall of the poor borehole to the water flow, Z0 and Z1 represent the position water heads of two adjacent positions of the interface, Z0 is the position water head of the interface close to the upper group of coal seams, Z1 is the position water head of the interface close to the lower group of coal seams, Z0 and Z1 are represented by the distance of the interface from the first position, p0 is the pressure of the aquifuge close to the interface of the upper group of coal seams, p1 is the pressure of the aquifuge close to the interface of the lower group of coal seams, p2 is the pressure of the aquifer close to the interface of the lower group of coal seams, γ w is the specific weight of water, v o and v1 represent the water flow velocities of two adjacent positions of the interface, v o is the water flow velocity of the aquifuge close to the interface of the upper group of coal seams, v1 is the water flow velocity of the aquifuge close to the interface of the lower group of coal seams, v2 is the water flow velocity of the aquifer close to the interface of the lower group of coal seams, and v o and v1 are the same, h y is the water head loss in the process of water flow through the aquifuge, h yw is the water head loss in the process of water flow through the aquifer, f is the resistance coefficient, L and L2 are the distances of two adjacent interfaces, d is the diameter of the poor borehole, v is the water flow velocity in the poor borehole, A is the cross-sectional area of the poor borehole, and S is the cross-sectional perimeter of the poor borehole; according to the first relationship, the second relationship, the third relationship, the fourth relationship, the initial water flow pressure information, the initial water flow velocity information and the working condition information, the water flow data of each aquifer and each aquifuge between the first position and the second position is determined. According to the working condition information and the water flow data, a target water inflow of the poor drilling hole is determined, including: obtaining first water flow velocity information of the second position in the water flow data; according to the working condition information and the first water flow velocity information, the target water inflow of the poor drilling hole is determined as wherein, v 终 is the first water flow velocity information.

2. The method of claim 1, wherein, determining the water flow data of the positions of each aquifer and each aquifuge between the first position and the second position according to the first relationship, the second relationship, the third relationship, the fourth relationship, the initial water flow pressure information, the initial water flow velocity information and the working condition information, including: determining the first pressure information and the second water flow velocity information of the interface of the aquifuge close to the lower group of coal seams according to the first relationship, the second relationship, the initial water flow pressure information, the initial water flow velocity information and the working condition information, and determining the first water head loss information of the aquifuge according to the second relationship and the initial water flow velocity information; determining the second pressure information and the third water flow velocity information of the interface of the aquifer close to the lower group of coal seams according to the first relationship, the third relationship, the second water flow velocity information and the working condition information, and determining the second water head loss information of the aquifer according to the second water flow velocity information, the third water flow velocity information and the fourth relationship.

3. The method of claim 2, wherein, After the water flow data of each aquifer and each aquifuge between the first position and the second position are determined according to the first relationship, the second relationship, the third relationship, the fourth relationship, the initial water flow pressure information, the initial water flow velocity information, and the working condition information, the method further comprises: obtaining a preset first drawdown, the first drawdown being used to represent a predicted depth of water level drop; According to the working condition information, the plurality of first water head loss information, the plurality of second water head loss information, the first pressure information of the second position and the second water flow velocity information of the second position, a second water head drawdown between the first position and the second position is determined as wherein v5 is a water flow velocity at an outlet of the poor borehole, p5 is a water flow pressure at the outlet of the poor borehole, and the second water head drawdown is used to represent a theoretical depth of water level drop; in a case where a difference between the first drawdown and the second drawdown is less than a predetermined value, determining that the target water inflow meets a predetermined requirement.

4. The method of claim 1, wherein, According to the working condition information, the endpoint position of the crack caused by the damage of the bottom of the upper group of coal seams by the poor drilling hole is determined to obtain a first position, and the endpoint position of the development height of the water flowing fractured zone of the lower group of coal seams by the poor drilling hole is determined to obtain a second position, comprising: obtaining a predetermined model, the predetermined model being trained by machine learning using a plurality of sets of predetermined data, each set of the predetermined data including historical working condition information and corresponding first historical position and second historical position; inputting the working condition information into the predetermined model to obtain the first position and the second position corresponding to the poor drilling hole.

5. The method according to any one of claims 1 to 4, characterized in that, The exploration data information of the poor drilling hole includes columnar chart information and aperture information of the poor drilling hole, and the engineering geological condition information at least includes spatial position information, thickness information and physical and mechanical parameter information of the poor drilling hole, the upper group of coal seams, the aquifer, the aquifuge and the lower group of coal seams.

6. The method according to any one of claims 1 to 4, characterized in that, The upper group of coal seams and the lower group of coal seams are in contact with the aquifuge, and the aquifer is located between two adjacent aquifers.

7. An apparatus for determining a bad hole flow rate, characterized by The poor drilling hole water inflow determination device is used to execute the poor drilling hole water inflow determination method in any one of claims 1 to 6, the poor drilling hole is connected with the upper group of coal seams and the lower group of coal seams, and the upper group of coal seams and the lower group of coal seams have a plurality of aquifers and a plurality of aquifers therebetween, and the device comprises: a first obtaining unit configured to obtain working condition information of a region where the poor drilling hole is located, the working condition information including exploration data information of the poor drilling hole and engineering geological condition information of the region; a first determining unit configured to determine, according to the working condition information, an endpoint position of a crack caused by damage of a bottom of the upper group of coal seams by the poor drilling hole to obtain a first position, and determine an endpoint position of a development height of a water flowing fractured zone of the lower group of coal seams by the poor drilling hole to obtain a second position, the first position being a position reached by the damage of the bottom of the upper group of coal seams by the poor drilling hole, and the second position being a position reached by the damage of the top of the lower group of coal seams by the poor drilling hole; a second determining unit configured to determine, according to the working condition information, water flow data of each aquifer and each aquifuge between the first position and the second position, the water flow data including water flow velocity information, water flow pressure information and water head loss information; a third determining unit configured to determine, according to the working condition information and the water flow data, a target water inflow of the poor drilling hole.

Images