Methods, devices, and storage media for determining pressure relief strategies for coal and rock masses.

Abstract

This invention discloses a method, apparatus, and storage medium for determining a stress relief strategy for coal and rock masses. The method includes: acquiring basic data of the coal and rock mass, wherein the basic data is used to simulate the physical and mechanical parameters and / or boundary conditions of the coal and rock mass; simulating the coal and rock mass based on the basic data to obtain simulation results; determining an initial stress relief strategy for the coal and rock mass based on the simulation results; depressurizing the coal and rock mass according to the initial stress relief strategy and acquiring actual stability information and actual energy accumulation information of the coal and rock mass during the stress relief process, wherein the actual stability information indicates the stress distribution of the coal and rock mass during the stress relief process, and the actual energy accumulation information indicates the degree of strain energy accumulation within the coal and rock mass during the stress relief process; and adjusting the initial stress relief strategy based on the actual stability information and the actual energy accumulation information to obtain a target stress relief strategy. This invention solves the technical problem of being unable to reduce the stress concentration degree of coal and rock masses.

Description

Technical Field

[0001] This invention relates to the field of coal mine safety technology, and more specifically, to a method, apparatus, and storage medium for determining a pressure relief strategy for coal and rock masses. Background Technology

[0002] Currently, in the coal mining sector, especially when facing steeply inclined, thick coal seams or complex geological conditions, dynamic disasters such as rock bursts and rockbursts pose significant threats to mine safety. These dynamic disasters are often caused by stress concentration and energy accumulation in the coal and rock mass, seriously threatening the lives of miners and mine facilities. Therefore, how to effectively relieve pressure to reduce the stress concentration in the coal and rock mass has become an urgent problem to be solved in mining operations.

[0003] Traditional pressure relief methods in related technologies mainly include blasting, water injection, and drilling. While blasting can rapidly reduce stress in coal and rock masses, it suffers from drawbacks such as significant vibration and environmental impact. Water injection, by injecting water or other fluids into the coal and rock mass, creates cracks and voids, reducing its strength and stress concentration; however, its effectiveness and range are affected by the permeability of the coal and rock mass. Drilling creates stress release spaces within the coal and rock mass by drilling holes, reducing stress concentration; however, the size and location of the boreholes significantly impact the pressure relief effect, requiring optimization of their location parameters through numerical simulation. Therefore, some methods fail to reduce stress concentration in coal and rock masses.

[0004] There is currently no effective solution to the aforementioned technical problem of failing to reduce the stress concentration in coal and rock masses. Summary of the Invention

[0005] This invention provides a method, apparatus, and storage medium for determining a stress relief strategy for coal and rock masses, in order to at least solve the technical problem of being unable to reduce the stress concentration in coal and rock masses.

[0006] According to one aspect of the present invention, a method for determining a stress relief strategy for a coal and rock mass is provided. The method may include: acquiring basic data of the coal and rock mass, wherein the basic data is used to simulate the physical and mechanical parameters and / or boundary conditions of the coal and rock mass; simulating the coal and rock mass based on the basic data to obtain simulation results, wherein the simulation results include at least predicted stability information and predicted energy accumulation information, the predicted stability information indicating the predicted stress distribution of the coal and rock mass, and the predicted energy accumulation information indicating the predicted degree of strain energy accumulation within the coal and rock mass; determining an initial stress relief strategy for the coal and rock mass based on the simulation results, wherein the initial stress relief strategy indicates the rules for stress relief of the coal and rock mass; depressurizing the coal and rock mass according to the initial stress relief strategy, and acquiring actual stability information and actual energy accumulation information of the coal and rock mass during the stress relief process, wherein the actual stability information indicating the stress distribution of the coal and rock mass during the stress relief process, and the actual energy accumulation information indicating the degree of strain energy accumulation within the coal and rock mass during the stress relief process; and adjusting the initial stress relief strategy based on the actual stability information and the actual energy accumulation information to obtain a target stress relief strategy.

[0007] Optionally, based on the basic data, the coal and rock mass is simulated to obtain simulation results, including: predicting the target area of ​​the coal and rock mass based on the basic data, wherein the target area is used to indicate the potential rockburst and rockburst hazard areas; and simulating the coal and rock mass based on the target area and the basic data to obtain simulation results.

[0008] Optionally, the coal and rock mass is depressurized according to the initial depressurization strategy, and the actual stability information and actual energy accumulation information of the coal and rock mass during the depressurization process are obtained, including: depressurizing the coal and rock mass according to the initial depressurization strategy, determining the water injection information during the depressurization process, wherein the water injection information may include at least: the wetting radius of the coal and rock mass under water injection, the distance between the borehole and the roadway side and / or the depth between the borehole and the floor; based on the water injection information, the actual stability information and actual energy accumulation information of the coal and rock mass during the depressurization process are obtained.

[0009] Optionally, based on actual stability information and actual energy accumulation information, the initial depressurization strategy is adjusted to obtain the target depressurization strategy, including: determining the execution result of the coal and rock mass under the initial depressurization strategy based on actual stability information and actual energy accumulation information, wherein the execution result includes at least the execution effect and the safety level; and adjusting the initial depressurization strategy based on the execution result to obtain the target depressurization strategy.

[0010] Optionally, based on actual stability information and actual energy accumulation information, the execution result of the coal and rock mass under the initial decompression strategy is determined, including: determining the decompression information of the coal and rock mass based on actual stability information and actual energy accumulation information, wherein the decompression information includes at least: on-site microseismic information, ground sound information, electromagnetic radiation information, and stress monitoring information; and integrating the decompression information to determine the execution result.

[0011] Optionally, the method for determining the pressure relief strategy of coal and rock mass may further include: storing target pressure relief strategies.

[0012] According to another aspect of the present invention, an apparatus for determining a pressure relief strategy for a coal and rock mass is also provided. The device may include: a first acquisition unit for acquiring basic data of the coal and rock mass, wherein the basic data is used to simulate the physical and mechanical parameters and / or boundary conditions of the coal and rock mass; a simulation unit for simulating the coal and rock mass based on the basic data to obtain simulation results, wherein the simulation results include at least predicted stability information and predicted energy accumulation information, wherein the predicted stability information is used to indicate the predicted stress distribution of the coal and rock mass, and the predicted energy accumulation information is used to indicate the predicted degree of strain energy accumulation inside the coal and rock mass; a first determination unit for determining an initial decompression strategy for the coal and rock mass based on the simulation results, wherein the initial decompression strategy is used to indicate the rules for decompressing the coal and rock mass; a second acquisition unit for decompressing the coal and rock mass according to the initial decompression strategy and acquiring actual stability information and actual energy accumulation information of the coal and rock mass during the decompression process, wherein the actual stability information is used to indicate the stress distribution of the coal and rock mass during the decompression process, and the actual energy accumulation information is used to indicate the degree of strain energy accumulation inside the coal and rock mass during the decompression process; and an adjustment unit for adjusting the initial decompression strategy based on the actual stability information and actual energy accumulation information to obtain a target decompression strategy.

[0013] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein, when the program is run by a processor, the device where the storage medium is located executes the method for determining the decompression strategy of coal and rock mass according to the embodiments of the present invention.

[0014] According to another aspect of the present invention, a processor is also provided. The processor is used to run a program, wherein the program, when running, executes the method for determining the pressure relief strategy for coal and rock masses according to the embodiments of the present invention.

[0015] According to another aspect of the present invention, a computer program product is also provided. The program product includes computer instructions that, when executed by a processor, implement the method for determining the pressure relief strategy for coal and rock masses according to the embodiments of the present invention.

[0016] In this embodiment of the invention, basic data of the coal-rock mass is acquired, wherein the basic data is used to simulate the physical and mechanical parameters and / or boundary conditions of the coal-rock mass; based on the basic data, the coal-rock mass is simulated to obtain simulation results, wherein the simulation results include at least predicted stability information and predicted energy accumulation information; based on the simulation results, an initial decompression strategy for the coal-rock mass is determined; the coal-rock mass is decompressed according to the initial decompression strategy, and the actual stability information and actual energy accumulation information of the coal-rock mass during the decompression process are acquired, wherein the actual stability information is used to indicate the stress distribution of the coal-rock mass during the decompression process, and the actual energy accumulation information is used to indicate the degree of strain energy accumulation inside the coal-rock mass during the decompression process; based on the actual stability information and the actual energy accumulation information, the initial decompression strategy is adjusted to obtain the target decompression strategy. In other words, this invention simulates the coal and rock mass using basic data to obtain simulation results. Based on these simulation results and the actual stability and energy accumulation information of the coal and rock mass during the decompression process, the initial decompression strategy is adjusted to obtain the target decompression strategy. This solves the technical problem of not being able to reduce the stress concentration of the coal and rock mass and achieves the technical effect of reducing the stress concentration of the coal and rock mass. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a flowchart of a method for determining a pressure relief strategy for coal and rock masses according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of a pressure relief and anti-scour mode in the advanced high-pressure water injection area of ​​a tunneling face according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of a planar radial seepage flow according to an embodiment of the present invention;

[0021] Figure 4 This is a flowchart of a method for combined regional and local pressure relief and anti-scour techniques in steeply inclined, thick coal seam roadways based on numerical simulation, according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram illustrating the determination of roadway side pressure relief parameters according to an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram illustrating the determination of roadway floor pressure relief parameters according to an embodiment of the present invention;

[0024] Figure 7This is a schematic diagram of a depressurization scheme for the area before ultra-high pressure water injection around a tunnel according to an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of a large-diameter borehole pressure relief principle according to an embodiment of the present invention;

[0026] Figure 9(a) is a schematic diagram of pressure relief in a large-diameter borehole at the roadway side and face according to an embodiment of the present invention;

[0027] Figure 9(b) is a schematic diagram of pressure relief in a large-diameter borehole at the roadway side and face according to an embodiment of the present invention;

[0028] Figure 10 This is a schematic diagram of a device for determining a pressure relief strategy for a coal and rock mass according to an embodiment of the present invention. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention 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 so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, functional component, or device 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, functional components, or devices.

[0031] According to an embodiment of the present invention, an embodiment of a method for determining a pressure relief strategy for a coal and rock mass is provided. 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. Furthermore, 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 1 This is a flowchart illustrating a method for determining a pressure relief strategy for coal and rock masses according to an embodiment of the present invention, as shown below. Figure 1 As shown, the method may include the following steps:

[0033] Step S101: Obtain basic data of the coal and rock mass.

[0034] In the technical solution provided by step S101 of the present invention, the basic data is used to simulate the physical and mechanical parameters and / or boundary conditions of coal and rock masses.

[0035] In this embodiment, basic data of the coal and rock mass is obtained. For example, a three-dimensional geological model of the coal and rock mass is built using FLAC3D software, and the physical and mechanical parameters and boundary conditions of the model are obtained. This is only an example and does not limit the specific method for obtaining basic data of the coal and rock mass.

[0036] Step S102: Based on the basic data, simulate the coal and rock mass to obtain simulation results.

[0037] In the technical solution provided by step S102 of the present invention, the simulation results include at least predicted stability information and predicted energy accumulation information. The predicted stability information is used to indicate the predicted stress distribution of the coal and rock mass, and the predicted energy accumulation information is used to indicate the predicted degree of strain energy accumulation inside the coal and rock mass.

[0038] In this embodiment, after obtaining the basic data of the coal and rock mass in step S101, the coal and rock mass is simulated based on the basic data to obtain simulation results. For example, the coal and rock mass is simulated using FLAC3D software to obtain simulation results. This is only an exemplary example and does not limit the specific method for simulating the coal and rock mass.

[0039] For example, based on the specific geological conditions of steeply inclined coal seams and basic data, a simulation was conducted using a combination of long-distance directional drilling, high-pressure water injection, and large-diameter boreholes to relieve pressure, thereby determining the simulation results.

[0040] Optionally, by using FLAC3D software to simulate regional water injection and local large-diameter borehole decompression technology, precise decompression can be achieved for different regions based on stress distribution and coal characteristics, effectively reducing the probability of rockbursts.

[0041] Step S103: Based on the simulation results, determine the initial decompression strategy for the coal and rock mass.

[0042] In the technical solution provided in step S103 of the present invention, the initial decompression strategy is used to indicate the rules for decompressing the coal and rock mass. The initial decompression strategy can also be called a decompression scheme.

[0043] In this embodiment, after determining the simulation results in step S102, the initial pressure relief strategy for the coal and rock mass is determined based on the simulation results. For example, by comparing and analyzing the simulation results of different schemes, the optimal pressure relief scheme, i.e., the initial pressure relief strategy, is selected.

[0044] Optionally, the initial depressurization strategy may include at least the following: long-distance directional drilling and high-pressure water injection, large-diameter drilling and other depressurization schemes, and determine the location, diameter, length and other parameters of the borehole.

[0045] Step S104: Depressurize the coal and rock mass according to the initial depressurization strategy, and obtain the actual stability information and actual energy accumulation information of the coal and rock mass during the depressurization process.

[0046] In the technical solution provided by step S104 of the present invention, the actual stability information is used to indicate the stress distribution of the coal and rock mass during the decompression process, and the actual energy accumulation information is used to indicate the degree of strain energy accumulation inside the coal and rock mass during the decompression process.

[0047] In this embodiment, after determining the initial decompression strategy for the coal and rock mass in step S103, the coal and rock mass is decompressed according to the initial decompression strategy, and the actual stability information and actual energy accumulation information of the coal and rock mass during the decompression process are obtained. The actual stability information can also be referred to as the actual stress change, and the actual energy accumulation information can also be referred to as the energy status.

[0048] For example, an initial decompression scheme is implemented, using engineering techniques such as directional drilling, high-pressure water injection, and large-diameter drilling to monitor the stress changes and energy status of the coal and rock mass in real time during the decompression process.

[0049] Step S105: Based on the actual stability information and the actual energy accumulation information, adjust the initial depressurization strategy to obtain the target depressurization strategy.

[0050] In the technical solution provided by step S105 of the present invention, the initial depressurization strategy is optimized based on the actual stability information and the actual energy accumulation information to obtain the target depressurization strategy.

[0051] In this embodiment, after obtaining the actual stability information and actual energy accumulation information in step S104, the evaluation data is used to evaluate the actual stability information and actual energy accumulation information of the initial depressurization strategy, and the initial depressurization strategy is optimized to obtain the target depressurization strategy.

[0052] For example, transient electromagnetic detection and borehole inspection combined with on-site microseismic and ground acoustic data are used to evaluate the decompression effect, and the combined regional and local decompression effects are evaluated, so as to optimize and adjust the plan in a timely manner.

[0053] It should be noted that the above embodiments can be executed by a coal crushing and feeding control system.

[0054] In steps S101 to S105 of this invention, basic data of the coal and rock mass are obtained, wherein the basic data is used to simulate the physical and mechanical parameters and / or boundary conditions of the coal and rock mass; based on the basic data, the coal and rock mass is simulated to obtain simulation results, wherein the simulation results include at least predicted stability information and predicted energy accumulation information; based on the simulation results, an initial decompression strategy for the coal and rock mass is determined; the coal and rock mass is decompressed according to the initial decompression strategy, and the actual stability information and actual energy accumulation information of the coal and rock mass during the decompression process are obtained, wherein the actual stability information is used to indicate the stress distribution of the coal and rock mass during the decompression process, and the actual energy accumulation information is used to indicate the degree of strain energy accumulation inside the coal and rock mass during the decompression process; based on the actual stability information and the actual energy accumulation information, the initial decompression strategy is adjusted to obtain the target decompression strategy. In other words, this invention simulates the coal and rock mass using basic data to obtain simulation results. Based on these simulation results and the actual stability and energy accumulation information of the coal and rock mass during the decompression process, the initial decompression strategy is adjusted to obtain the target decompression strategy. This solves the technical problem of not being able to reduce the stress concentration of the coal and rock mass and achieves the technical effect of reducing the stress concentration of the coal and rock mass.

[0055] The method described in this embodiment will be further described below.

[0056] As an optional implementation method, the coal and rock mass is simulated based on the basic data to obtain simulation results, including: predicting the target area of ​​the coal and rock mass based on the basic data, wherein the target area is used to indicate the potential rockburst and rockburst hazard area; and simulating the coal and rock mass based on the target area and the basic data to obtain simulation results.

[0057] In this embodiment, the target area of ​​the coal and rock mass is predicted based on basic data. For example, through numerical simulation analysis, the stress distribution and energy accumulation of the coal and rock mass are predicted, and potential rockburst and rockburst hazard areas are identified.

[0058] Optionally, the coal and rock mass can be simulated based on the target area and basic data to obtain simulation results. That is, the target area can be simulated using a three-dimensional geological model of the coal and rock mass established using FLAC3D software to obtain simulation results.

[0059] As an optional embodiment, the coal and rock mass is depressurized according to an initial depressurization strategy, and the actual stability information and actual energy accumulation information of the coal and rock mass during the depressurization process are obtained. This includes: depressurizing the coal and rock mass according to the initial depressurization strategy, determining water injection information during the depressurization process, wherein the water injection information may include at least: the wetting radius of the coal and rock mass under water injection, the distance between the borehole and the roadway side and / or the depth between the borehole and the floor; and obtaining the actual stability information and actual energy accumulation information of the coal and rock mass during the depressurization process based on the water injection information.

[0060] In this embodiment, the coal and rock mass is depressurized according to the initial depressurization strategy, and water injection information is determined during the depressurization process. For example, water injection is carried out on both sides and the floor of the roadway ahead of the tunneling head to depressurize.

[0061] For example, in a roadway where water injection for pressure relief is implemented on both sides and the floor ahead of the excavation face, this technical solution involves setting up a drilling site behind the excavation face and drilling long-distance directional boreholes along the sides, top, and bottom of the roadway. After the drilling is completed, water injection is carried out, achieving dual pressure relief through drilling and high-pressure water injection. Figure 2 This is a schematic diagram of a pressure relief and anti-scour mode in the advanced high-pressure water injection area of ​​a tunneling face according to an embodiment of the present invention, as shown below. Figure 2 As shown, a pressure relief protection zone is created within a certain range around the roadway to ensure that the roadway is always excavated within the pressure relief zone, thus guaranteeing the safety of roadway excavation and subsequent operations. The effectiveness of pressure relief and weakening of the surrounding rock in roadway depends mainly on the wetting radius of the coal seam under water injection and the depth of the borehole from the roadway walls and floor. Figure 3 This is a schematic diagram of planar radial seepage according to an embodiment of the present invention, as shown below. Figure 3 As shown, coal seam water injection studies the movement of water in complex porous media, which refers to media containing a large number of pores of varying shapes and sizes, connected or disconnected. Since the wetting radius of the water injection borehole is very small, water injection in coal seams can be simplified to planar radial seepage. Darcy's law can then be expressed using the following formula (1):

[0062]

[0063] Integrating the above formula (1) yields the following formula (2):

[0064]

[0065] Where v is the seepage velocity (cm / s) and O is the injection flow rate (cm³). 3 / s; k is the permeability of the coal seam, D; μ is the fluid viscosity, cp; h is the borehole length, m; S is the cross-sectional area, m 2 r is the outer boundary radius, in meters; r w Let p be the inner boundary radius, m;r The pressure at a distance r from the borehole, in Pa; p w Let be the internal boundary pressure, Pa. The average velocity of seepage can be expressed by the following formula (3):

[0066]

[0067] The seepage area can then be expressed using the following formula (4):

[0068] S=2πrh (4)

[0069] In practice, to minimize the impact of coal seam water injection on production, the water injection time t is relatively fixed. Therefore, the wetting range per unit time is... It can be expressed using the following formula (5).

[0070]

[0071] Wherein, obtain r w p w The specific values ​​of k and μ are determined, and the water injection time is set to calculate the coal body wetting range R.

[0072] As an optional implementation method, the initial depressurization strategy is adjusted based on the actual stability information and the actual energy accumulation information to obtain the target depressurization strategy. This includes: determining the execution result of the coal and rock mass under the initial depressurization strategy based on the actual stability information and the actual energy accumulation information, wherein the execution result includes at least the execution effect and the safety level; and adjusting the initial depressurization strategy based on the execution result to obtain the target depressurization strategy.

[0073] In this embodiment, the execution result of the coal and rock mass under the initial decompression strategy is determined by comparing the actual stability information and the actual energy accumulation information with the predicted stability information and the predicted energy accumulation information.

[0074] Optionally, after determining the execution results of the coal and rock mass under the initial pressure relief strategy, optimization parameters are determined, and the initial pressure relief strategy is adjusted to obtain the target pressure relief strategy. The optimization parameters can be used to optimize pressure relief schemes such as long-distance directional drilling, high-pressure water injection, and large-diameter drilling, determining parameters such as the location, diameter, and length of the borehole.

[0075] For example, implementing a pressure relief scheme involves using engineering techniques such as directional drilling, high-pressure water injection, and large-diameter drilling to reduce the stress concentration in the coal and rock mass. During the pressure relief process, the stress changes and energy levels of the coal and rock mass are monitored in real time to assess the effectiveness of the pressure relief and make adjustments and optimizations as needed.

[0076] As an optional implementation method, the execution result of the coal and rock mass under the initial decompression strategy is determined based on the actual stability information and the actual energy accumulation information. This includes: determining the decompression information of the coal and rock mass based on the actual stability information and the actual energy accumulation information, wherein the decompression information includes at least: on-site microseismic information, ground sound information, electromagnetic radiation information, and stress monitoring information; and integrating the decompression information to determine the execution result.

[0077] In this embodiment, the decompression information of the coal and rock mass is determined based on actual stability information and actual energy accumulation information. For example, during the decompression process, the stress changes and energy status of the coal and rock mass are monitored in real time, i.e., the actual stability information and actual energy accumulation information, to evaluate the decompression effect and make adjustments and optimizations as needed.

[0078] Optionally, after determining the depressurization information, the depressurization information is integrated to determine the execution result of depressurizing the coal and rock mass according to the initial depressurization strategy.

[0079] As an optional embodiment, the method for determining the control strategy of coalbed methane further includes: a storage target depressurization strategy.

[0080] In this embodiment, the target decompression strategy is stored. For example, the target decompression strategy is stored in a server.

[0081] Optionally, by storing the target depressurization strategy, it is convenient for managers to monitor and view the depressurization strategy in the future.

[0082] It should be noted that the above embodiments can be executed by a coal crushing and feeding control system.

[0083] In this embodiment, basic data of the coal-rock mass is acquired, wherein the basic data is used to simulate the physical and mechanical parameters and / or boundary conditions of the coal-rock mass; based on the basic data, the coal-rock mass is simulated to obtain simulation results, wherein the simulation results include at least predicted stability information and predicted energy accumulation information; based on the simulation results, an initial decompression strategy for the coal-rock mass is determined; the coal-rock mass is decompressed according to the initial decompression strategy, and the actual stability information and actual energy accumulation information of the coal-rock mass during the decompression process are acquired, wherein the actual stability information is used to indicate the stress distribution of the coal-rock mass during the decompression process, and the actual energy accumulation information is used to indicate the degree of strain energy accumulation inside the coal-rock mass during the decompression process; based on the actual stability information and the actual energy accumulation information, the initial decompression strategy is adjusted to obtain the target decompression strategy. In other words, this invention simulates the coal and rock mass using basic data to obtain simulation results. Based on these simulation results and the actual stability and energy accumulation information of the coal and rock mass during the decompression process, the initial decompression strategy is adjusted to obtain the target decompression strategy. This solves the technical problem of not being able to reduce the stress concentration of the coal and rock mass and achieves the technical effect of reducing the stress concentration of the coal and rock mass.

[0084] The technical solutions of the embodiments of the present invention will be illustrated below with reference to preferred embodiments.

[0085] Currently, in the coal mining sector, especially when facing steeply inclined, thick coal seams or complex geological conditions, dynamic disasters such as rock bursts and rockbursts pose significant threats to mine safety. These dynamic disasters are often caused by stress concentration and energy accumulation in the coal and rock mass, seriously threatening the lives of miners and mine facilities. Therefore, how to effectively relieve pressure to reduce the stress concentration in the coal and rock mass has become an urgent problem to be solved in mining operations.

[0086] Traditional pressure relief methods in related technologies mainly include blasting, water injection, and drilling. While blasting can rapidly reduce stress in coal and rock masses, it suffers from drawbacks such as significant vibration and environmental impact. Water injection, by injecting water or other fluids into the coal and rock mass, creates cracks and voids, reducing its strength and stress concentration; however, its effectiveness and range are affected by the permeability of the coal and rock mass. Drilling creates stress release spaces within the coal and rock mass through boreholes, reducing stress concentration; however, the size and location of the boreholes significantly impact the pressure relief effect, requiring optimization of their location parameters through numerical simulation. Therefore, there remains a technical problem of failing to reduce stress concentration in coal and rock masses. Currently, no effective solution has been proposed to address this problem.

[0087] However, this invention proposes a method for combined regional and local pressure relief and rockburst prevention in steeply inclined, thick coal seam roadways based on numerical simulation. A three-dimensional geological model of the coal and rock mass is established using FLAC3D software, and the model's physical and mechanical parameters and boundary conditions are set. Through numerical simulation analysis, the stress distribution and energy accumulation of the coal and rock mass are predicted, and potential rockburst and rockburst hazard areas are identified. Based on the simulation results, pressure relief schemes such as long-distance directional drilling, high-pressure water injection, and large-diameter drilling are designed and optimized, and parameters such as the location, diameter, and length of the boreholes are determined. The pressure relief schemes are implemented, and the stress concentration of the coal and rock mass is reduced through engineering techniques such as directional drilling, high-pressure water injection, and large-diameter drilling. During the pressure relief process, the stress changes and energy conditions of the coal and rock mass are monitored in real time, the pressure relief effect is evaluated, and adjustments and optimizations are made as needed. Finally, the combined regional and local pressure relief effect is evaluated using on-site microseismic and ground acoustic monitoring data, thereby allowing for timely optimization and adjustment of the scheme. This solves the technical problem of not being able to reduce the stress concentration of the coal and rock mass and achieves the technical effect of reducing the stress concentration of the coal and rock mass.

[0088] The embodiments of the present invention will be further described below.

[0089] Figure 4 This is a flowchart of a method for combined regional and local pressure relief and anti-shocking in steeply inclined, thick coal seam roadways based on numerical simulation, according to an embodiment of the present invention. The method includes the following steps:

[0090] Step S401: Use FLAC3D software to establish a three-dimensional geological model of the coal and rock mass, and set the physical and mechanical parameters and boundary conditions of the model.

[0091] In this embodiment, such as Figure 2 As shown, water injection for pressure relief is carried out on both sides and the floor of the roadway ahead of the excavation head. This technical solution involves setting up a drilling site behind the excavation head and drilling long-distance directional holes along the direction of the excavation face on both sides and the top and bottom plates. After the drilling is completed, water injection is carried out to achieve dual pressure relief through drilling and high-pressure water injection. This creates a pressure relief protection zone around the roadway within a certain range, ensuring that the roadway is always excavated in the pressure relief zone and guaranteeing the safety of roadway excavation and subsequent operations.

[0092] Optionally, the effectiveness of pressure relief and weakening of the surrounding rock in the roadway mainly depends on the wetting radius of the coal seam under water injection and the depth of the borehole from the roadway walls and floor. Coal seam water injection studies the movement of water in complex porous media, which refers to media containing a large number of pores of various shapes and sizes, connected or disconnected. Since the wetting radius of the water injection borehole is very small, drilling water injection in the coal seam can be simplified as planar radial seepage, such as... Figure 3 As shown.

[0093] Optionally, the medium wetting range R can be calculated using the aforementioned formulas (1) to (5), which will not be elaborated here.

[0094] Optionally, long-distance directional boreholes are arranged in the sidewalls of the roadway, and the support conditions of the surrounding rock of the roadway, i.e., the length of the anchor bolts, need to be considered; in order to ensure the anchoring effect of the anchor bolts, a certain range of protective layer is reserved outside the anchor bolt area; considering the wetting radius when water is injected into the coal seam, it can be expressed by the following formula (6):

[0095] D = R1 + B g +L g (6)

[0096] Where D is the depth of the borehole from the sidewall, in meters (m); L g B is the length of the anchor bolt, in meters. g R1 represents the protective layer for the anchor bolts, in meters (m); R1 represents the radius of influence of water injection in the coal seam, in meters (m).

[0097] Using the above formula (6), considering the influence of factors such as coal seam bedding, the values ​​of wetting radius R1, Bg, and Lg are obtained, and the borehole depth D from the sidewall is calculated. Later, the borehole depth from the sidewall is continuously optimized based on the pressure relief effect, achieving a good pressure relief effect without damaging the roadway sidewall anchorage area.

[0098] Optionally, Figure 5 This is a schematic diagram illustrating the determination of roadway side pressure relief parameters according to an embodiment of the present invention, as shown below. Figure 5 As shown, the layout of the bottom plate of a steeply inclined, thick coal seam roadway must simultaneously consider the impact on the lower layers, namely the thickness of the lower layer roadway, the height of the lower layer roadway, the length of the anchor cables used in the lower layer, the protective layer reserved on the outside of the anchor cables, and the wetting radius when water is injected into the coal seam. It can be expressed by the following formula (7):

[0099] D1 = H - H1 - L s -B s -R2 (7)

[0100] Wherein, D1 represents the depth of the directional boreholes in the floor, in meters; H represents the thickness of the lower coal seam, in meters; H1 represents the height of the lower roadway, in meters; L... s Anchor cable length, in meters; B s The unit is the anchor cable protection layer (m); the radius of influence of water injection in the R2 coal seam (m).

[0101] Optionally, Figure 6 This is a schematic diagram illustrating the determination of roadway floor pressure relief parameters according to an embodiment of the present invention, as shown below. Figure 6As shown, the height of the lower section is designed to obtain H. The values ​​of H1, Ls, and Bs are taken (the thickness of the protective layer is appropriately increased considering the factor that water flows to lower places). The wetting radius R2 is obtained considering the influence of factors such as interbedded coal seams. The borehole depth D1 from the floor is calculated according to the aforementioned formula (7). In the later stage, the borehole depth from the floor is continuously optimized according to the pressure relief effect, and a good pressure relief effect is achieved without damaging the anchoring area of ​​the roof of the lower roadway.

[0102] Optionally, based on the above analysis, a specific design scheme for advanced high-pressure water injection around the tunnel was determined. The initial length of the high-pressure water injection borehole was determined to be 600m, and the final length will be determined based on factors such as whether borehole collapse occurs during the later stages of construction.

[0103] Step S402: Through numerical simulation analysis, predict the stress distribution and energy accumulation of the coal and rock mass, and identify potential rockburst and rock burst hazard areas.

[0104] In this embodiment, the stress distribution and energy accumulation of the coal and rock mass are predicted by numerical simulation analysis determined in step S401, and potential rockburst and rockburst hazard areas are identified.

[0105] In step S403, the tunneling face adopts a coordinated "regional + local" pressure relief measure. The regional pressure relief is achieved through advanced high-pressure water injection, while the local pressure relief is achieved through large-diameter borehole drilling.

[0106] In this embodiment, the tunneling face adopts a coordinated "regional + local" pressure relief measure. The regional pressure relief is achieved through advanced high-pressure water injection, while the local pressure relief is achieved through large-diameter borehole drilling.

[0107] Optionally, Figure 7 This is a schematic diagram of a depressurization scheme for the area surrounding an ultra-high pressure water injection tunnel according to an embodiment of the present invention, as shown below. Figure 7 As shown, after large-diameter boreholes are arranged in the coal seam, the boreholes deform and break under the action of surrounding rock stress, spreading outward from the borehole to the coal and rock mass. According to the degree of damage to the coal and rock mass, they can be divided into surrounding rock fracture zone, plastic deformation zone, and elastic deformation zone. The larger the range of the coal fracture zone and plastic deformation zone, the larger the range of coal body stress and compaction, and the lower the strength of the coal body. After drilling into the coal body, the borehole will shrink under the action of internal stress of the coal body. After exceeding the friction force of the coal body on the borehole wall, the borehole will collapse. The free space generated by the borehole will be filled by the collapsed coal body. Finally, the stress relief zone centered on the borehole is not the same as the borehole diameter. The properties and occurrence conditions of the coal body will affect the range of the coal fracture zone and plastic deformation zone. The ratio of the deformation modulus of the coal body to the deformation modulus of the original coal body can be called the softening coefficient. The softening coefficient is calculated according to the following formula (8):

[0108]

[0109] Where A is the distance between the borehole boundaries, in millimeters (mm); E is the diameter of the large-diameter hole, in mm; L = A + E, the borehole spacing (hole distance), in mm.

[0110] Optionally, Figure 8 This is a schematic diagram of a large-diameter borehole pressure relief principle according to an embodiment of the present invention, as shown below. Figure 8 As shown, after drilling to relieve pressure in a high-stress coal body, the borehole failure forms a pressure relief ring much larger than the borehole diameter, which is formed by the coal body's fractured zone and plastic deformation zone. After multiple boreholes form pressure relief rings that are interconnected, they form a larger pressure relief zone, creating a large-scale weak surface inside the coal body. This reduces the peak stress inside the coal body and transfers it to the deeper parts of the coal body, releasing a large amount of harmful elastic energy accumulated in the coal body due to high stress and eliminating the impact hazard.

[0111] Optionally, Figure 9(a) is a schematic diagram of large-diameter borehole pressure relief in the roadway sidewall and face according to an embodiment of the present invention; Figure 9(b) is a schematic diagram of another large-diameter borehole pressure relief in the roadway sidewall and face according to an embodiment of the present invention. As shown in Figure 9(a), the reason for rockburst in high-stress roadways is that under high stress, the surrounding rock mass of the roadway is relatively hard and can accumulate a large amount of elastic energy, which will cause impact when the bearing limit of the rock mass is reached. In this case, large-diameter borehole pressure relief is mostly used to control rockburst. As shown in Figure 9(b), generally, hollow hole / blasting pressure relief is implemented in hard rock rockburst roadways. The principle is mainly to transfer the high stress in the roadway sidewall and face to the depth by implementing large-diameter hollow hole and borehole blasting pressure relief, while reducing the stress peak value in the roadway sidewall and face area, thereby realizing the transfer and control of high stress in the roadway sidewall and face.

[0112] Step S404: Evaluate the effectiveness of the combined regional and local pressure relief, and optimize and adjust the plan in a timely manner.

[0113] In this embodiment, based on simulation results, a pressure relief scheme involving long-distance directional drilling, high-pressure water injection, and large-diameter drilling was designed and optimized, determining parameters such as the location, diameter, and length of the boreholes. The pressure relief scheme was implemented, using engineering techniques such as directional drilling, high-pressure water injection, and large-diameter drilling to reduce the stress concentration in the coal and rock mass. During the pressure relief process, stress changes and energy levels in the coal and rock mass were monitored in real time to evaluate the pressure relief effect, and adjustments and optimizations were made as needed. Finally, the combined regional and local pressure relief effects were evaluated using transient electromagnetic detection and borehole inspection combined with data from on-site microseismic activity, ground acoustics, electromagnetic radiation, and stress monitoring, allowing for timely optimization and adjustment of the scheme.

[0114] Optionally, the resistivity of the coal body changes before and after high-pressure water injection. The diffusion radius of the water injection and its pressure relief effect can be analyzed by examining the changes in the resistivity of the coal body before and after water injection. Transient electromagnetics, as a non-destructive resistivity testing method, is used to evaluate the pressure relief effect of high-pressure water injection in long-distance directional drilling. Before implementing long-distance directional drilling and high-pressure water injection, transient electromagnetics is used to probe the sides and floor of the roadway once using the above scheme to understand the distribution characteristics of the apparent resistivity in the surrounding rock of the roadway before pressure relief. After implementing long-distance directional drilling and high-pressure water injection, transient electromagnetics is used to probe the sides and floor of the roadway once using the above scheme to understand the pressure relief effect of long-distance directional drilling and high-pressure water injection within 100m ahead of the roadway. The changes in the apparent resistivity of the surrounding rock of the roadway during the two probes are compared and analyzed, and the pressure relief effect of long-distance drilling and high-pressure water injection is summarized and analyzed. After the first detection of the decompression effect of directional long-distance drilling + high-pressure water injection, the tunnel is probed every 100m of excavation. The decompression effect in front of the tunnel is analyzed continuously. Once the decompression law and effect of directional long-distance drilling + high-pressure water injection are fully understood, no further probes are needed. The parameters such as the range of influence and effect are used as the design basis for decompression under other similar conditions.

[0115] The borehole inspection instrument was used to detect the development of fractures inside long-distance directional boreholes before and after high-pressure water injection, and to evaluate the pressure relief effect of high-pressure water injection in long-distance directional boreholes. Borehole inspection and analysis: The mining borehole imaging instrument uses borehole television digital imaging technology to observe and measure the borehole and generate a three-dimensional digital core map and borehole trajectory map. It can be used for coal mine observation and quantitative analysis of the strike, thickness, dip, and dip angle of coal seams and other ore bodies, as well as the degree of interbedded rock and delamination fractures with the roof strata. It is suitable for vertical holes, horizontal holes, and inclined holes (plunge and elevation angles), and anchor cable (rod) holes. This equipment can not only observe various structural features inside the borehole in real time and intuitively, but also perform video imaging of the entire borehole, and can generate borehole unfolding diagrams and subsequent three-dimensional columnar diagrams on-site. It can vividly and intuitively reproduce the internal structure of the borehole and perform quantitative analysis. Through inspection and detection of hydraulic fracturing boreholes and comparison holes, the extension morphology and range of fracturing fractures can be comprehensively analyzed. Based on the structural changes of the coal and rock mass, field data can be provided for subsequent drilling and high-pressure water injection fracturing schemes, which is conducive to timely and effective adjustment of the layout and related parameters of water injection boreholes.

[0116] The above-mentioned technical solutions enable accurate prediction and analysis of stress distribution and energy accumulation in coal and rock masses, providing a scientific basis for the design and optimization of stress relief schemes. Simultaneously, the use of engineering techniques such as directional drilling, high-pressure water injection, and large-diameter boreholes can efficiently and accurately reduce stress concentration in coal and rock masses, preventing and reducing dynamic disasters such as rockbursts and rock bursts, thereby improving the safety and efficiency of coal mining.

[0117] In this embodiment, a three-dimensional geological model of the coal and rock mass is established using FLAC3D software, and the physical and mechanical parameters and boundary conditions of the model are set. Through numerical simulation analysis, the stress distribution and energy accumulation of the coal and rock mass are predicted, and potential rockburst and rockburst hazard areas are identified. Based on the simulation results, decompression schemes such as long-distance directional drilling, high-pressure water injection, and large-diameter drilling are designed and optimized, and parameters such as the location, diameter, and length of the boreholes are determined. The decompression scheme is implemented, and the stress concentration of the coal and rock mass is reduced through engineering techniques such as directional drilling, high-pressure water injection, and large-diameter drilling. During the decompression process, the stress changes and energy conditions of the coal and rock mass are monitored in real time, the decompression effect is evaluated, and adjustments and optimizations are made as needed. Finally, the effect of regional and local joint decompression is evaluated through on-site microseismic and ground acoustic monitoring data, thereby allowing for timely optimization and adjustment of the scheme. This solves the technical problem of not being able to reduce the stress concentration of the coal and rock mass and achieves the technical effect of reducing the stress concentration of the coal and rock mass.

[0118] According to embodiments of the present invention, an apparatus for determining a pressure relief strategy for a coal and rock mass is also provided. It should be noted that this apparatus for determining a pressure relief strategy for a coal and rock mass can be used to execute the method for determining a pressure relief strategy for a coal and rock mass in the method embodiments.

[0119] Figure 10 This is a schematic diagram of a device for determining a pressure relief strategy for coal and rock masses according to an embodiment of the present invention. Figure 10 As shown, the device 1000 for determining the decompression strategy of the coal and rock mass may include: a first acquisition unit 1001, a simulation unit 1002, a first determination unit 1003, a second acquisition unit 1004, and an adjustment unit 1005.

[0120] The first acquisition unit 1001 is used to acquire basic data of the coal and rock mass, wherein the basic data is used to simulate the physical and mechanical parameters and / or boundary conditions of the coal and rock mass.

[0121] The simulation unit 1002 is used to simulate the coal and rock mass based on the basic data and obtain simulation results. The simulation results include at least predicted stability information and predicted energy accumulation information. The predicted stability information is used to indicate the predicted stress distribution of the coal and rock mass, and the predicted energy accumulation information is used to indicate the predicted degree of strain energy accumulation inside the coal and rock mass.

[0122] The first determining unit 1003 is used to determine the initial decompression strategy of the coal and rock mass based on the simulation results, wherein the initial decompression strategy is used to indicate the rules for decompressing the coal and rock mass.

[0123] The second acquisition unit 1004 is used to depressurize the coal and rock mass according to the initial depressurization strategy and acquire the actual stability information and actual energy accumulation information of the coal and rock mass during the depressurization process. The actual stability information is used to indicate the stress distribution of the coal and rock mass during the depressurization process, and the actual energy accumulation information is used to indicate the degree of strain energy accumulation inside the coal and rock mass during the depressurization process.

[0124] The adjustment unit 1005 is used to adjust the initial depressurization strategy based on the actual stability information and the actual energy accumulation information to obtain the target depressurization strategy.

[0125] Optionally, the simulation unit 1002 may include: a prediction module for predicting the target area of ​​the coal and rock mass based on basic data, wherein the target area is used to indicate potential rockburst and rockburst hazard areas; and a simulation module for simulating the coal and rock mass based on the target area and basic data to obtain simulation results.

[0126] Optionally, the second acquisition unit 1004 may include: a first determining module, used to depressurize the coal and rock mass according to the initial depressurization strategy and determine the water injection information during the depressurization process, wherein the water injection information may include at least: the wetting radius of the coal and rock mass under water injection, the distance between the borehole and the roadway side and / or the depth between the borehole and the floor; and a first acquisition module, used to acquire the actual stability information and actual energy accumulation information of the coal and rock mass during the depressurization process based on the water injection information.

[0127] Optionally, the adjustment unit 1005 may include: a second determining module, used to determine the execution result of the coal and rock mass under the initial decompression strategy based on actual stability information and actual energy accumulation information, wherein the execution result includes at least the execution effect and the safety level; and an adjustment module, used to adjust the initial decompression strategy based on the execution result to obtain the target decompression strategy.

[0128] Optionally, the second determining module may include: a first determining submodule, used to determine the pressure relief information of the coal and rock mass based on actual stability information and actual energy accumulation information, wherein the pressure relief information includes at least: on-site microseismic information, ground sound information, electromagnetic radiation information, and stress monitoring information; and a second determining submodule, used to integrate the pressure relief information and determine the execution result.

[0129] Optionally, the apparatus 1000 for determining the pressure relief strategy of the coal and rock mass may further include: a storage unit for storing the target pressure relief strategy.

[0130] In this embodiment, basic data of the coal-rock mass is acquired, wherein the basic data is used to simulate the physical and mechanical parameters and / or boundary conditions of the coal-rock mass; based on the basic data, the coal-rock mass is simulated to obtain simulation results, wherein the simulation results include at least predicted stability information and predicted energy accumulation information; based on the simulation results, an initial decompression strategy for the coal-rock mass is determined; the coal-rock mass is decompressed according to the initial decompression strategy, and the actual stability information and actual energy accumulation information of the coal-rock mass during the decompression process are acquired, wherein the actual stability information is used to indicate the stress distribution of the coal-rock mass during the decompression process, and the actual energy accumulation information is used to indicate the degree of strain energy accumulation inside the coal-rock mass during the decompression process; based on the actual stability information and the actual energy accumulation information, the initial decompression strategy is adjusted to obtain the target decompression strategy. In other words, this invention simulates the coal and rock mass using basic data to obtain simulation results. Based on these simulation results and the actual stability and energy accumulation information of the coal and rock mass during the decompression process, the initial decompression strategy is adjusted to obtain the target decompression strategy. This solves the technical problem of not being able to reduce the stress concentration of the coal and rock mass and achieves the technical effect of reducing the stress concentration of the coal and rock mass.

[0131] According to an embodiment of the present invention, a computer-readable storage medium is also provided, the storage medium including a stored program, wherein the program executes a method for determining a pressure relief strategy for coal and rock masses in an embodiment of the method.

[0132] According to an embodiment of the present invention, a processor is also provided for running a program, wherein the program executes the method for determining the pressure relief strategy of coal and rock mass in the method embodiment.

[0133] According to an embodiment of the present invention, a computer program product is also provided, the computer program product including computer instructions, which, when executed by a processor, implement the method for determining the pressure relief strategy of coal and rock mass in the method embodiment.

[0134] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0135] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0136] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.

[0137] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0138] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0139] If the integrated unit is implemented as a software functional unit and sold or used as an independent functional component, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software functional component. This computer software functional component is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0140] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for determining a pressure relief strategy for coal and rock masses, characterized in that, include: Using a three-dimensional geological model of the coal and rock mass established with FLAC3D software, basic data of the coal and rock mass are obtained, wherein the basic data is used to simulate the physical and mechanical parameters and / or boundary conditions of the coal and rock mass; Based on the aforementioned basic data, the coal and rock mass is simulated to obtain simulation results. The simulation results include at least predicted stability information and predicted energy accumulation information. The predicted stability information is used to indicate the predicted stress distribution of the coal and rock mass, and the predicted energy accumulation information is used to indicate the predicted degree of strain energy accumulation inside the coal and rock mass. Based on the simulation results, an initial decompression strategy for the coal and rock mass is determined, wherein the initial decompression strategy is used to indicate the rules for decompressing the coal and rock mass; The coal and rock mass is depressurized according to the initial depressurization strategy, and the actual stability information and actual energy accumulation information of the coal and rock mass during the depressurization process are obtained. The actual stability information is used to indicate the stress distribution of the coal and rock mass during the depressurization process, and the actual energy accumulation information is used to indicate the degree of strain energy accumulation inside the coal and rock mass during the depressurization process. Based on the actual stability information and the actual energy accumulation information, the initial depressurization strategy is adjusted to obtain the target depressurization strategy. The process of depressurizing the coal and rock mass according to the initial depressurization strategy and obtaining the actual stability information and actual energy accumulation information of the coal and rock mass during the depressurization process includes: depressurizing the coal and rock mass according to the initial depressurization strategy, determining the water injection information during the depressurization process, wherein the water injection information includes at least: the wetting radius of the coal and rock mass under water injection, the distance between the borehole and the roadway sidewall and / or the depth of the borehole to the floor, wherein the initial depressurization strategy is a strategy for drilling operations on the two sidewalls, the floor and the roof, and then performing water injection operations after the drilling operations; and obtaining the actual stability information and actual energy accumulation information of the coal and rock mass during the depressurization process based on the water injection information.

2. The method according to claim 1, characterized in that, Based on the aforementioned basic data, a simulation of the coal and rock mass was performed, yielding simulation results, including: Based on the aforementioned basic data, the target area of ​​the coal and rock mass is predicted, wherein the target area is used to indicate potential rockburst and rockburst hazard areas; Based on the target area and the basic data, the coal and rock mass is simulated to obtain the simulation results.

3. The method according to claim 1, characterized in that, Based on the actual stability information and the actual energy accumulation information, the initial depressurization strategy is adjusted to obtain the target depressurization strategy, including: Based on the actual stability information and the actual energy accumulation information, the execution result of the coal and rock mass under the initial decompression strategy is determined, wherein the execution result includes at least the execution effect and the safety level; Based on the execution results, the initial depressurization strategy is adjusted to obtain the target depressurization strategy.

4. The method according to claim 3, characterized in that, Based on the actual stability information and the actual energy accumulation information, the execution result of the coal and rock mass under the initial decompression strategy is determined, including: Based on the actual stability information and the actual energy accumulation information, the stress relief information of the coal and rock mass is determined, wherein the stress relief information includes at least: on-site microseismic information, ground sound information, electromagnetic radiation information, and stress monitoring information; The pressure relief information is integrated to determine the execution result.

5. The method according to claim 1, characterized in that, The method further includes: Store the target decompression strategy.

6. A device for determining a coalbed methane control strategy, characterized in that, include: The first acquisition unit is used to acquire basic data of the coal and rock mass using a three-dimensional geological model of the coal and rock mass established by FLAC3D software, wherein the basic data is used to simulate the physical and mechanical parameters and / or boundary conditions of the coal and rock mass. The simulation unit is used to simulate the coal and rock mass based on the basic data and obtain simulation results. The simulation results include at least predicted stability information and predicted energy accumulation information. The predicted stability information is used to indicate the predicted stress distribution of the coal and rock mass, and the predicted energy accumulation information is used to indicate the predicted degree of strain energy accumulation inside the coal and rock mass. The first determining unit is used to determine the initial decompression strategy of the coal and rock mass based on the simulation results, wherein the initial decompression strategy is used to indicate the rules for decompressing the coal and rock mass; The second acquisition unit is used to depressurize the coal and rock mass according to the initial depressurization strategy, and acquire the actual stability information and actual energy accumulation information of the coal and rock mass during the depressurization process. The actual stability information is used to indicate the stress distribution of the coal and rock mass during the depressurization process, and the actual energy accumulation information is used to indicate the degree of strain energy accumulation inside the coal and rock mass during the depressurization process. The adjustment unit is used to adjust the initial depressurization strategy based on the actual stability information and the actual energy accumulation information to obtain the target depressurization strategy; The second acquisition unit is further configured to depressurize the coal and rock mass according to the initial depressurization strategy, and determine the water injection information during the depressurization process. The water injection information includes at least: the wetting radius of the coal and rock mass under water injection, the distance between the borehole and the roadway side and / or the depth of the borehole to the floor. The initial depressurization strategy is a strategy for drilling operations on the two sides, the floor and the roof, and then performing water injection operations after the drilling operations. Based on the water injection information, the unit acquires the actual stability information and actual energy accumulation information of the coal and rock mass during the depressurization process.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein when the program is run by a processor, it controls the device in which the storage medium is located to perform the method according to any one of claims 1 to 5.

8. A processor, characterized in that, The processor is used to run a program, wherein the program executes the method according to any one of claims 1 to 5 when it runs.

9. A computer program product, characterized in that, The computer program product includes computer instructions that, when executed by a processor, implement the method described in any one of claims 1 to 5.

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