Top plate pressure relief determination method and device and storage medium

Abstract

The invention provides a roof pressure relief determination method, a roof pressure relief determination device and a storage medium. Determining a first effective micro-seismic event activity interval of a coal seam roof plane interval and a second effective micro-seismic event activity interval of a coal seam roof vertical interval in the coal seam roof three-dimensional space of the adjacent working face; and based on the first effective micro-seismic event activity interval and the second effective micro-seismic event activity interval of the adjacent working face, the roof pressure relief space position of the working face is determined. By analyzing the energy and the frequency of each micro-seismic event in the three-dimensional space of the coal seam roof of the adjacent working faces, the effective micro-seismic event activity intervals in the plane direction and the vertical direction of the adjacent working faces are accurately defined; and the spatial position of roof pressure relief of the working face is determined based on the effective micro-seismic event activity intervals of the adjacent working faces, so that the accuracy of determining the roof pressure relief position is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mining, and in particular to a method, device and storage medium for determining roof pressure relief. Background Art

[0002] With the increasing intensity of coal mining, the mining depth of coal resources has extended from shallow to deep, and the mining environment has become more complex and changeable. Under the combined influence of high ground stress and strong mining stress, the overlying hard and thick roof is prone to cause significant mine pressure in the working face area.

[0003] In order to alleviate this problem, downhole short-hole fracturing, long horizontal hole fracturing and ground fracturing are currently widely used to pre-break the coal seam roof. Therefore, it is very important to accurately determine the spatial location of the fracturing, which can not only improve the accuracy of the fracturing, but also effectively reduce the workload of the fracturing project.

[0004] Although the existing technology can use geological drilling columns, lithology monitoring in different areas of the roof and other means to determine the roof unloading layer, these methods still have limitations in accurately locating the specific spatial position of the roof unloading and cannot meet high-precision requirements. Summary of the invention

[0005] The present invention provides a method, device and storage medium for determining roof pressure relief, which are used to solve the technical defect in the prior art that the specific spatial position of roof pressure relief cannot be accurately located.

[0006] The present invention provides a method for determining roof pressure relief, comprising the following steps.

[0007] Based on the energy and frequency of each microseismic event in the three-dimensional space of the coal seam roof adjacent to the working face, determine the first effective microseismic event activity interval of the coal seam roof plane interval and the second effective microseismic event activity interval of the coal seam roof vertical interval in the three-dimensional space of the coal seam roof adjacent to the working face; Based on the first effective microseismic event activity interval and the second effective microseismic event activity interval of the adjacent working face, the roof decompression space position of the current working face is determined.

[0008] According to a method for determining roof pressure relief provided by the present invention, the method determines a first effective microseismic event activity interval of a coal seam roof plane interval in the three-dimensional space of a coal seam roof adjacent to a working face based on the energy and frequency of each microseismic event in the three-dimensional space of a coal seam roof adjacent to a working face, comprising: Determine the first total energy and the first total frequency of the microseismic events in each plane sub-interval divided in the plane interval of the coal seam roof in the three-dimensional space of the coal seam roof adjacent to the working face; Determine a plane sub-interval energy threshold based on the first total energy of the microseismic events in each plane sub-interval in the coal seam roof plane interval; Determine a plane sub-interval frequency threshold based on the first total frequency of microseismic events in each plane sub-interval in the coal seam roof plane interval; Determine a first target plane subinterval whose first total energy is greater than the plane subinterval energy threshold and a second target plane subinterval whose first total frequency is greater than the plane subinterval energy threshold; The first target plane sub-interval and the second target plane sub-interval are determined as the first effective microseismic event activity interval in the coal seam roof plane interval in the three-dimensional space of the coal seam roof adjacent to the working face.

[0009] According to a method for determining roof pressure relief provided by the present invention, the method further includes: Based on the width of the transport lane of the adjacent working face, the width of the adjacent working face, the width of the return air lane of the adjacent working face and the width of the coal pillar on the side of the return air lane of the adjacent working face, the plane interval of the coal seam roof in the three-dimensional space of the coal seam roof of the adjacent working face is determined; The coal seam roof plane interval is divided into a plurality of plane sub-intervals according to a first preset interval length.

[0010] According to a roof pressure relief determination method provided by the present invention, the second effective microseismic event activity interval of the vertical interval of the coal seam roof in the three-dimensional space of the coal seam roof adjacent to the working face is determined based on the energy and frequency of each microseismic event in the three-dimensional space of the coal seam roof adjacent to the working face, including: Determine the second total energy and the second total frequency of the microseismic events in each vertical sub-interval divided in the vertical interval of the coal seam roof in the three-dimensional space of the coal seam roof adjacent to the working face; Determining a vertical sub-interval energy threshold based on the second total energy of the microseismic events in each vertical sub-interval in the vertical interval of the coal seam roof; Determining a vertical sub-interval frequency threshold based on the second total frequency of microseismic events in each vertical sub-interval in the vertical interval of the coal seam roof; Determine a first target vertical subinterval in which the second total energy is greater than the vertical subinterval energy threshold and a second target vertical subinterval in which the second total frequency is greater than the vertical subinterval energy threshold; The first target vertical sub-interval and the second target vertical sub-interval are determined as second effective microseismic event activity intervals in the vertical interval of the coal seam roof in the three-dimensional space of the coal seam roof of the adjacent working face.

[0011] According to a method for determining roof pressure relief provided by the present invention, the method further includes: Based on the height of the fracture zone of the coal seam roof, determine the vertical interval of the coal seam roof in the three-dimensional space of the coal seam roof of the adjacent working face; The coal seam roof vertical interval is divided into a plurality of vertical sub-intervals according to a second preset interval length.

[0012] According to a method for determining roof decompression provided by the present invention, the method for determining the roof decompression spatial position of the current working face based on the first effective microseismic event activity interval and the second effective microseismic event activity interval of the adjacent working face comprises: Determine a second interval in a plane interval of a coal seam roof in a three-dimensional space of a coal seam roof adjacent to a working face, excluding the first effective microseismic event activity interval; Based on the second interval of the adjacent working surface, determining the top plate pressure relief area in the plane direction of the working surface; Based on the second effective microseismic event activity interval of the adjacent working face, the vertical roof decompression area of ​​the working face is determined.

[0013] The present invention also provides a device for determining roof pressure relief, comprising: A first roof pressure relief determination module is used to determine a first effective microseismic event activity interval of a coal seam roof plane interval and a second effective microseismic event activity interval of a coal seam roof vertical interval in the three-dimensional space of the coal seam roof of the adjacent working face based on the energy and frequency of each microseismic event in the three-dimensional space of the coal seam roof of the adjacent working face; The second roof pressure relief determination module is used to determine the roof pressure relief spatial position of the current working face based on the first effective microseismic event activity interval and the second effective microseismic event activity interval of the adjacent working face.

[0014] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, any of the above-mentioned methods for determining top plate decompression is implemented.

[0015] The method for determining roof pressure relief provided by the present invention includes determining a first effective microseismic event activity interval in a plane section of the coal seam roof in the three-dimensional space of the coal seam roof of the adjacent working face and a second effective microseismic event activity interval in a vertical section of the coal seam roof in the three-dimensional space of the coal seam roof of the adjacent working face based on the energy and frequency of each microseismic event in the three-dimensional space of the coal seam roof of the adjacent working face; determining the spatial position of roof pressure relief of the current working face based on the first effective microseismic event activity interval and the second effective microseismic event activity interval of the adjacent working face. The present invention accurately defines the effective microseismic event activity intervals in the plane direction and the vertical direction of the adjacent working face by analyzing the energy and frequency of each microseismic event in the three-dimensional space of the coal seam roof of the adjacent working face, and then determines the spatial position of roof pressure relief of the current working face based on these effective microseismic event activity intervals of the adjacent working face, thereby improving the accuracy of determining the roof pressure relief position. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic flow chart of the method for determining top plate pressure relief provided by the present invention.

[0018] Figure 2 This is one of the scenario schematic diagrams of the method for determining roof pressure relief provided by the present invention.

[0019] Figure 3 This is the second scenario schematic diagram of the method for determining roof pressure relief provided by the present invention.

[0020] Figure 4 This is the third scenario schematic diagram of the method for determining roof pressure relief provided by the present invention.

[0021] Figure 5 It is a structural schematic diagram of a top plate pressure relief determination method device provided by the present invention.

[0022] Figure 6 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Figure 1 : is a schematic diagram of the process of determining the roof pressure relief method provided by the present invention, such as Figure 1 As shown, the method includes step 210 and step 220.

[0025] Step 210: based on the energy and frequency of each microseismic event in the three-dimensional space of the coal seam roof adjacent to the working face, determine a first effective microseismic event activity interval in the plane interval of the coal seam roof and a second effective microseismic event activity interval in the vertical interval of the coal seam roof in the three-dimensional space of the coal seam roof adjacent to the working face; In the three-dimensional space of the coal seam roof of the adjacent working face (the mined section), the first effective microseismic event activity interval of the adjacent working face can be determined by statistically analyzing the distribution of the energy and frequency of microseismic events in the plane interval of the coal seam roof of the adjacent working face. The first effective microseismic event activity interval of the adjacent working face refers to the interval on the plane interval of the coal seam roof of the adjacent working face where microseismic events are more concentrated and have greater energy.

[0026] Similarly, in the three-dimensional space of the coal seam roof of the adjacent working face, the second effective microseismic event activity interval of the adjacent working face can be determined by counting and analyzing the distribution of the energy and frequency of microseismic events in the vertical interval of the coal seam roof of the adjacent working face.

[0027] Step 220: Determine the roof decompression space position of the current working face based on the first effective microseismic event activity interval and the second effective microseismic event activity interval of the adjacent working face.

[0028] Finally, the roof decompression space position of the current working face (the section being mined) is determined by combining the first effective microseismic event activity interval in the plane direction of the adjacent working face and the second effective microseismic event activity interval in the vertical direction.

[0029] Specifically, determine a second interval in the plane interval of the coal seam roof within the three-dimensional space of the coal seam roof of the adjacent working face, excluding the first effective microseismic event activity interval; based on the second interval of the adjacent working face, determine the roof decompression area in the plane direction of the working face; based on the second effective microseismic event activity interval of the adjacent working face, determine the roof decompression area in the vertical direction of the working face.

[0030] It should be understood that the microseismic activity in the area outside the first effective microseismic event activity interval in the plane direction of the coal seam roof is not obvious, so in this embodiment, the second interval in the plane interval of the coal seam roof of the adjacent working face, except for the first effective microseismic event activity interval, is used to determine the plane direction roof pressure relief area of ​​the working face. As for the vertical direction, in this embodiment, the vertical direction roof pressure relief area of ​​the working face is determined based on the second effective microseismic event activity interval of the adjacent working face.

[0031] Specifically, refer to Figure 3 As shown in the figure, the first effective microseismic event activity interval (i.e. Figure 3 After determining the blue dense interval range in the horizontal direction shown in the figure, determine the second interval in the plane interval of the coal seam roof of the adjacent working face, and then use this second interval as a reference to find the corresponding area in the plane interval of the coal seam roof of this working face, and define it as the plane direction roof pressure relief area.

[0032] It should be understood that the coal seam roof plane intervals of this working face and the adjacent working face follow the same division principles. In addition, the horizontal position of the plane direction roof pressure relief zone in this working face within the coal seam roof plane interval must be consistent with the horizontal position of the second interval in the adjacent working face within its coal seam roof plane interval, ensuring the relative consistency of the two in the horizontal dimension.

[0033] Similarly, the second effective microseismic event activity interval in the vertical interval of the coal seam roof adjacent to the working face is determined (e.g. Figure 4 After taking the second effective microseismic event activity interval as a benchmark, a corresponding interval is found and determined within the vertical interval of the coal seam roof of this working face, and it is marked as the vertical roof decompression area.

[0034] It should be noted that the division of the vertical interval of the coal seam roof in both the current working face and the adjacent working face is consistent. Furthermore, the vertical position of the vertical roof pressure relief area determined in the current working face in the vertical interval of its coal seam roof matches the vertical position of the second effective microseismic event activity interval in the adjacent working face in the corresponding coal seam roof vertical interval, ensuring the relative consistency of the two in the vertical dimension.

[0035] The method for determining roof pressure relief provided in an embodiment of the present invention analyzes the energy and frequency of each microseismic event in the three-dimensional space of the coal seam roof of the adjacent working face, accurately defines the effective microseismic event activity intervals in the plane direction and the vertical direction of the adjacent working face, and then determines the spatial position of the roof pressure relief of the current working face based on these effective microseismic event activity intervals of the adjacent working face, thereby improving the accuracy of determining the roof pressure relief position.

[0036] In some embodiments, the determining of a first effective microseismic event activity interval of a coal seam roof plane interval in the three-dimensional space of the coal seam roof adjacent to the working face based on the energy and frequency of each microseismic event in the three-dimensional space of the coal seam roof adjacent to the working face comprises: Determine the first total energy and the first total frequency of the microseismic events in each plane sub-interval divided in the plane interval of the coal seam roof in the three-dimensional space of the coal seam roof adjacent to the working face; Determine a plane sub-interval energy threshold based on the first total energy of the microseismic events in each plane sub-interval in the coal seam roof plane interval; Determine a plane sub-interval frequency threshold based on the first total frequency of microseismic events in each plane sub-interval in the coal seam roof plane interval; Determine a first target plane subinterval whose first total energy is greater than the plane subinterval energy threshold and a second target plane subinterval whose first total frequency is greater than the plane subinterval energy threshold; The first target plane sub-interval and the second target plane sub-interval are determined as the first effective microseismic event activity interval in the coal seam roof plane interval in the three-dimensional space of the coal seam roof adjacent to the working face.

[0037] In the three-dimensional space of the coal seam roof of the adjacent working face, the plane interval of the coal seam roof of the adjacent working face is first divided into a plurality of plane subintervals. For each plane subinterval, the first total energy and the first total frequency of all microseismic events occurring in the plane subinterval are calculated.

[0038] Afterwards, the plane sub-interval energy threshold of the coal seam roof plane interval is determined based on the first total energy of the microseismic events in each plane sub-interval of the coal seam roof plane interval; and the plane sub-interval frequency threshold of the coal seam roof plane interval is determined based on the first total frequency of the microseismic events in each plane sub-interval of the coal seam roof plane interval.

[0039] In one example, the plane subinterval energy threshold , where the average energy value of the plane subinterval is , the mean square error of the energy of the plane subinterval , is the first total energy of the microseismic event in the i-th plane subinterval.

[0040] In one example, the plane subinterval frequency threshold , where the plane subinterval frequency average , the mean square error of the energy of the plane subinterval , is the first total frequency of microseismic events in the i-th plane subinterval.

[0041] Compare the first total energy of the microseismic events in each plane subinterval with the plane subinterval energy threshold, find out the plane subintervals whose first total energy is greater than the plane subinterval energy threshold, and these plane subintervals are marked as first target plane subintervals. Similarly, compare the first total frequency of the microseismic events in each plane subinterval with the plane subinterval frequency threshold, find out the plane subintervals whose first total frequency is greater than the plane subinterval frequency threshold, and these plane subintervals are marked as second target plane subintervals.

[0042] Finally, the first target plane sub-interval and the second target plane sub-interval are merged to determine these sub-intervals as the first effective microseismic event activity interval in the coal seam roof plane interval in the three-dimensional space of the coal seam roof of the adjacent working face.

[0043] In some embodiments, it also includes: Based on the width of the transport lane of the adjacent working face, the width of the adjacent working face, the width of the return air lane of the adjacent working face and the width of the coal pillar on the side of the return air lane of the adjacent working face, the plane interval of the coal seam roof in the three-dimensional space of the coal seam roof of the adjacent working face is determined; The coal seam roof plane interval is divided into a plurality of plane sub-intervals according to a first preset interval length.

[0044] In this embodiment, before performing microseismic monitoring and analysis, the plane interval of the coal seam roof of the adjacent working face in the plane direction is first determined. Figure 2 As shown, the plane interval of the coal seam roof is determined based on the following parameters: the width of the coal pillar on the return air lane side of the adjacent working face L1 (the width of the coal pillar on the return air lane side of the adjacent working face), the width of the return air lane of the adjacent working face L2 (the width of the return air lane of the adjacent working face), the width of the adjacent working face L3 (the width of the adjacent working face) and the width of the transport lane of the adjacent working face L4 (the width of the transport lane of the adjacent working face).

[0045] Through these parameters, the plane interval L=L1+L2+L3+L4 of the coal seam roof of the adjacent working face can be determined. Then the coal seam roof plane interval L is further divided into multiple smaller plane sub-intervals to facilitate a more detailed analysis of microseismic events. Specifically, it is further divided into multiple smaller plane sub-intervals according to a preset interval length (such as 10m). For example, the first plane sub-interval starts from the coal pillar on the return air lane side of the adjacent working face, extends horizontally for 10 meters in the direction of the transport lane of the adjacent working face, and then begins to divide the second plane sub-interval... and so on. Before dividing to the end of the transport lane of the adjacent working face, if the remaining plane width is less than 10 meters, then the area less than 10 meters will be discarded and will not be regarded as an independent plane sub-interval.

[0046] The method for determining roof pressure relief provided in an embodiment of the present invention divides the plane interval of the coal seam roof in the three-dimensional space of the coal seam roof adjacent to the working face into multiple plane sub-intervals, and then accurately identifies the first effective microseismic event activity interval in the plane direction in the three-dimensional space of the coal seam roof adjacent to the working face based on the first total energy and the first total frequency of the microseismic events in each plane sub-interval.

[0047] In some embodiments, determining a second effective microseismic event activity interval of a vertical interval of a coal seam roof in the three-dimensional space of a coal seam roof adjacent to a working face based on the energy and frequency of each microseismic event in the three-dimensional space of a coal seam roof adjacent to a working face comprises: Determine the second total energy and the second total frequency of the microseismic events in each vertical sub-interval divided in the vertical interval of the coal seam roof in the three-dimensional space of the coal seam roof adjacent to the working face; Determining a vertical sub-interval energy threshold based on the second total energy of the microseismic events in each vertical sub-interval in the vertical interval of the coal seam roof; Determining a vertical sub-interval frequency threshold based on the second total frequency of microseismic events in each vertical sub-interval in the vertical interval of the coal seam roof; Determine a first target vertical subinterval in which the second total energy is greater than the vertical subinterval energy threshold and a second target vertical subinterval in which the second total frequency is greater than the vertical subinterval energy threshold; The first target vertical sub-interval and the second target vertical sub-interval are determined as second effective microseismic event activity intervals in the vertical interval of the coal seam roof in the three-dimensional space of the coal seam roof of the adjacent working face.

[0048] In the three-dimensional space of the coal seam roof adjacent to the working face, the vertical interval of the coal seam roof is first divided into a number of vertical sub-intervals. For each vertical sub-interval, the second total energy and the second total frequency of all microseismic events occurring in the vertical sub-interval are calculated.

[0049] Afterwards, the vertical sub-interval energy threshold is determined based on the second total energy of the microseismic events in each vertical sub-interval of the vertical interval of the coal seam roof; the vertical sub-interval frequency threshold is determined based on the second total frequency of the microseismic events in each vertical sub-interval of the vertical interval of the coal seam roof.

[0050] In one example, the vertical sub-interval energy threshold , where the average energy value of the vertical sub-interval is , vertical sub-interval energy mean square error , is the second total energy of the microseismic event in the i-th vertical subinterval.

[0051] In one example, the vertical sub-interval frequency threshold , where the vertical sub-interval frequency average , vertical sub-interval energy mean square error , is the second total frequency of microseismic events in the i-th vertical subinterval.

[0052] Compare the first total energy of the microseismic events in each vertical subinterval with the vertical subinterval energy threshold, find the vertical subintervals whose second total energy is greater than the vertical subinterval energy threshold, and these vertical subintervals are marked as first target vertical subintervals. Similarly, compare the second total frequency of the microseismic events in each vertical subinterval with the vertical subinterval frequency threshold, find the vertical subintervals whose second total frequency is greater than the vertical subinterval frequency threshold, and these vertical subintervals are marked as second target vertical subintervals.

[0053] Finally, the first target vertical sub-interval and the second target vertical sub-interval are merged to determine these sub-intervals as the second effective microseismic event activity interval in the vertical interval of the coal seam roof in the three-dimensional space of the coal seam roof of the adjacent working face.

[0054] In some embodiments, it also includes: Based on the height of the coal seam roof fracture zone, determine the vertical interval of the coal seam roof in the three-dimensional space of the coal seam roof of the adjacent working face; The coal seam roof vertical interval is divided into a plurality of vertical sub-intervals according to a second preset interval length.

[0055] Similarly, before conducting microseismic monitoring and analysis, the analysis interval of the coal seam roof in the vertical direction is determined first.

[0056] In this embodiment, the height of the fracture zone of the coal seam roof is first determined, and this height is used as the basis for determining the vertical analysis interval of the adjacent working face. The fracture zone of the coal seam roof refers to the area where cracks and fractures appear in the roof rock layer due to mining activities. Therefore, the height of the fracture zone of the coal seam roof has an important influence on the stability of the roof. Specifically, the determined vertical interval usually starts from the coal seam roof and extends to the height of the fracture zone. This interval is the main range for analyzing microseismic events in the vertical direction of the roof.

[0057] After determining the vertical interval of the coal seam roof of the adjacent working face, it is further divided into multiple smaller vertical sub-intervals to facilitate a more detailed analysis of microseismic events. Specifically, it is further divided into multiple smaller vertical sub-intervals according to a preset interval length (such as 5m). For example, the first vertical sub-interval starts from the coal seam roof and extends upward for 5 meters before the second vertical sub-interval is divided... and so on. Before dividing to the top of the fracture zone, if the remaining rock layer height is less than 5 meters, then this area less than 5 meters will be discarded and not treated as an independent vertical sub-interval.

[0058] The method for determining roof pressure relief provided in an embodiment of the present invention divides the vertical area in the three-dimensional space of the coal seam roof into multiple vertical sub-intervals, and then accurately identifies the second effective microseismic event activity interval in the vertical direction in the three-dimensional space of the coal seam roof based on the second total energy and the second total frequency of the microseismic events in each vertical sub-interval.

[0059] The following is a description of a method and device for determining top plate pressure relief provided by the present invention. The method and device for determining top plate pressure relief described below and the method for determining top plate pressure relief described above can be referenced to each other.

[0060] refer to Figure 5 In this embodiment, the top plate pressure relief determination device includes: The first roof pressure relief determination module 510 is used to determine a first effective microseismic event activity interval of a coal seam roof plane interval and a second effective microseismic event activity interval of a coal seam roof vertical interval in the three-dimensional space of the coal seam roof adjacent to the working face based on the energy and frequency of each microseismic event in the three-dimensional space of the coal seam roof adjacent to the working face; The second roof pressure relief determination module 520 is used to determine the roof pressure relief spatial position of the current working face based on the first effective microseismic event activity interval and the second effective microseismic event activity interval of the adjacent working face.

[0061] The device for determining roof pressure relief provided in an embodiment of the present invention analyzes the energy and frequency of each microseismic event in the three-dimensional space of the coal seam roof of the adjacent working face, accurately defines the effective microseismic event activity intervals in the plane direction and the vertical direction of the adjacent working face, and then determines the spatial position of the roof pressure relief of the current working face based on these effective microseismic event activity intervals of the adjacent working face, thereby improving the accuracy of determining the roof pressure relief position.

[0062] Figure 6 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 6 As shown, the electronic device may include: a processor 610, a communications interface 620, a memory 630 and a communication bus 640, wherein the processor 610, the communications interface 620 and the memory 630 communicate with each other through the communication bus 640. The processor 610 may call the logic instructions in the memory 630 to execute the roof depressurization determination method, which includes: Based on the energy and frequency of each microseismic event in the three-dimensional space of the coal seam roof adjacent to the working face, determine the first effective microseismic event activity interval of the coal seam roof plane interval and the second effective microseismic event activity interval of the coal seam roof vertical interval in the three-dimensional space of the coal seam roof adjacent to the working face; Based on the first effective microseismic event activity interval and the second effective microseismic event activity interval of the adjacent working face, the roof decompression space position of the current working face is determined.

[0063] In addition, the logic instructions in the above-mentioned memory 630 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0064] On the other hand, the present invention further provides a computer program product, the computer program product comprising a computer program, the computer program can be stored in a non-transitory computer-readable storage medium, when the computer program is executed by a processor, the computer can execute the roof decompression determination method provided by the above methods, the method comprising: Based on the energy and frequency of each microseismic event in the three-dimensional space of the coal seam roof adjacent to the working face, determine the first effective microseismic event activity interval of the coal seam roof plane interval and the second effective microseismic event activity interval of the coal seam roof vertical interval in the three-dimensional space of the coal seam roof adjacent to the working face; Based on the first effective microseismic event activity interval and the second effective microseismic event activity interval of the adjacent working face, the roof decompression space position of the current working face is determined.

[0065] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the computer program is executed by a processor to perform the roof depressurization determination method provided by the above methods, the method comprising: Based on the energy and frequency of each microseismic event in the three-dimensional space of the coal seam roof adjacent to the working face, determine the first effective microseismic event activity interval of the coal seam roof plane interval and the second effective microseismic event activity interval of the coal seam roof vertical interval in the three-dimensional space of the coal seam roof adjacent to the working face; Based on the first effective microseismic event activity interval and the second effective microseismic event activity interval of the adjacent working face, the roof decompression space position of the current working face is determined.

[0066] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0067] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for determining roof pressure relief, characterized in that: include: Based on the energy and frequency of each microseismic event in the three-dimensional space of the coal seam roof adjacent to the working face, determine the first effective microseismic event activity interval of the coal seam roof plane interval and the second effective microseismic event activity interval of the coal seam roof vertical interval in the three-dimensional space of the coal seam roof adjacent to the working face; Based on the first effective microseismic event activity interval and the second effective microseismic event activity interval of the adjacent working face, the roof decompression space position of the current working face is determined.

2. The method for determining roof pressure relief according to claim 1, characterized in that: The method of determining a first effective microseismic event activity interval of a coal seam roof plane interval in the three-dimensional space of a coal seam roof adjacent to a working face based on the energy and frequency of each microseismic event in the three-dimensional space of a coal seam roof adjacent to a working face comprises: Determine the first total energy and the first total frequency of the microseismic events in each plane sub-interval divided in the plane interval of the coal seam roof in the three-dimensional space of the coal seam roof adjacent to the working face; Determine a plane sub-interval energy threshold based on the first total energy of the microseismic events in each plane sub-interval in the coal seam roof plane interval; Determine a plane sub-interval frequency threshold based on the first total frequency of microseismic events in each plane sub-interval in the coal seam roof plane interval; Determine a first target plane subinterval whose first total energy is greater than the plane subinterval energy threshold and a second target plane subinterval whose first total frequency is greater than the plane subinterval energy threshold; The first target plane sub-interval and the second target plane sub-interval are determined as the first effective microseismic event activity interval in the coal seam roof plane interval in the three-dimensional space of the coal seam roof adjacent to the working face.

3. The method for determining roof pressure relief according to claim 2, characterized in that: The method further comprises: Based on the width of the transport lane of the adjacent working face, the width of the adjacent working face, the width of the return air lane of the adjacent working face and the width of the coal pillar on the side of the return air lane of the adjacent working face, the plane interval of the coal seam roof in the three-dimensional space of the coal seam roof of the adjacent working face is determined; The coal seam roof plane interval is divided into a plurality of plane sub-intervals according to a first preset interval length.

4. The method for determining roof pressure relief according to claim 1, characterized in that: The method of determining a second effective microseismic event activity interval of a vertical interval of a coal seam roof in the three-dimensional space of a coal seam roof adjacent to a working face based on the energy and frequency of each microseismic event in the three-dimensional space of a coal seam roof adjacent to a working face comprises: Determine the second total energy and the second total frequency of the microseismic events in each vertical sub-interval divided in the vertical interval of the coal seam roof in the three-dimensional space of the coal seam roof adjacent to the working face; Determining a vertical sub-interval energy threshold based on the second total energy of the microseismic events in each vertical sub-interval in the vertical interval of the coal seam roof; Determining a vertical sub-interval frequency threshold based on the second total frequency of microseismic events in each vertical sub-interval in the vertical interval of the coal seam roof; Determine a first target vertical subinterval in which the second total energy is greater than the vertical subinterval energy threshold and a second target vertical subinterval in which the second total frequency is greater than the vertical subinterval energy threshold; The first target vertical sub-interval and the second target vertical sub-interval are determined as second effective microseismic event activity intervals in the vertical interval of the coal seam roof in the three-dimensional space of the coal seam roof of the adjacent working face.

5. The method for determining roof pressure relief according to claim 4, characterized in that: The method further comprises: Based on the height of the fracture zone of the coal seam roof, determine the vertical interval of the coal seam roof in the three-dimensional space of the coal seam roof of the adjacent working face; The coal seam roof vertical interval is divided into a plurality of vertical sub-intervals according to a second preset interval length.

6. The method for determining roof pressure relief according to claim 1, characterized in that: The determining of the roof decompression space position of the current working face based on the first effective microseismic event activity interval and the second effective microseismic event activity interval of the adjacent working face comprises: Determine a second interval in a plane interval of a coal seam roof in a three-dimensional space of a coal seam roof adjacent to a working face, excluding the first effective microseismic event activity interval; Based on the second interval of the adjacent working surface, determining the top plate pressure relief area in the plane direction of the working surface; Based on the second effective microseismic event activity interval of the adjacent working face, the vertical roof decompression area of ​​the working face is determined.

7. A device for determining roof pressure relief, characterized in that: include: A first roof pressure relief determination module is used to determine a first effective microseismic event activity interval of a coal seam roof plane interval and a second effective microseismic event activity interval of a coal seam roof vertical interval in the three-dimensional space of the coal seam roof of the adjacent working face based on the energy and frequency of each microseismic event in the three-dimensional space of the coal seam roof of the adjacent working face; The second roof pressure relief determination module is used to determine the roof pressure relief spatial position of the current working face based on the first effective microseismic event activity interval and the second effective microseismic event activity interval of the adjacent working face.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for determining roof depressurization according to any one of claims 1 to 6 is implemented.

Images