A coal mine mining monitoring method, device and computer equipment

Abstract

The present application provides a coal mine mining monitoring method, device and computer equipment. The method includes: listening for microseismic signals corresponding to a first monitoring area, where the microseismic signals include the occurrence times of each microseismic source in the first monitoring area, and the observed arrival times and calculated arrival times of the microseismic waves corresponding to each microseismic source propagating to each sensor in the first monitoring area; determining the microseismic source corresponding to the minimum time residual value as the target point based on the observed arrival times and calculated arrival times of the microseismic waves corresponding to each microseismic source propagating to each sensor in the first monitoring area; collecting the microseismic frequency and position information of the target point; if the microseismic frequency of the target point is greater than a preset threshold, outputting a first prompt message for over-layer coal mine mining. The present application determines the microseismic frequency of the target point through microseismic technology. If the microseismic frequency of the target point is greater than a preset threshold, a first prompt message for over-layer coal mine mining is output, which is not restricted by the coal seam geological conditions and can achieve real-time and accurate monitoring of coal mine mining.

Description

Technical Field

[0001] The present application relates to the field of computer technology, and particularly to a method and device for monitoring coal mine mining and a computer device. Background Art

[0002] In coal mining, it is necessary to strictly abide by the mining rules and mine the working face according to the plan. If mining beyond the boundary or overburden, it will not only bring many economic disputes, but also pose serious safety hazards. Therefore, the monitoring of coal mine boundary crossing and overburden mining behaviors is crucial.

[0003] Currently, the commonly used means for monitoring boundary crossing and overburden mining include on-site measurement methods such as the drilling method and the hollow inclusion stress gauge, as well as theoretical calculation and numerical simulation methods such as the generalized back-projection coefficient and the limit equilibrium theory.

[0004] The on-site measurement method requires comparing the monitoring points before and after mining. Since the floor deformation has a certain lag relative to the advancement of the working face, it is difficult to obtain the post-mining data, and it is difficult to achieve real-time monitoring of the floor deformation. There are disadvantages such as large engineering quantities and limited monitoring ranges. The numerical simulation method not only requires on-site measurement data as a basis, but also has strong subjective factors, and there are large errors in the calculation results.

[0005] Therefore, due to the soft coal seam geological conditions and complex geological structures, the existing technologies are difficult to be generally applicable to the monitoring of coal mine boundary crossing or overburden. Summary of the Invention

[0006] In order to solve the above technical problems, the present application provides a method and device for monitoring coal mine mining and a computer device. The specific solutions are as follows:

[0007] In a first aspect, an embodiment of the present application provides a method for monitoring coal mine mining, and the method for monitoring coal mine mining includes:

[0008] Listening to microseismic signals corresponding to a first monitoring area, where the microseismic signals include the occurrence times of each microseismic source in the first monitoring area, and the observed arrival times and calculated arrival times of the microseismic waves corresponding to each microseismic source propagating to each sensor in the first monitoring area;

[0009] Based on the observed arrival times and the calculated arrival times of the microseismic waves corresponding to each microseismic source propagating to each sensor in the first monitoring area, determining the microseismic source corresponding to the minimum time residual value as the target point;

[0010] Collecting the microseismic frequency and position information of the target point;

[0011] If the microseismic frequency of the target point is greater than a preset threshold, outputting a first prompt message for coal mine overburden mining, where the first prompt message includes the position information of the target point.

[0012] According to a specific implementation manner disclosed in the present application, the step of determining the calculated arrival time includes:

[0013] Obtain the calculated travel times of the microseismic waves propagating from the microseismic source to each of the sensors;

[0014] Through the formula t ci = t0 + t ti (T i , S) calculate the calculated arrival times corresponding to each sensor, where t ci is the calculated arrival time corresponding to the i-th sensor, i≥1, t0 is the earthquake occurrence time of the microseismic source, and t ti (T i , S) is the calculated travel time corresponding to the i-th sensor, T i is the sensor parameter of the i-th sensor, and S is the source parameter of the microseismic source.

[0015] According to a specific implementation manner disclosed in the present application, the step of determining the time residual value includes:

[0016] Subtract the observed arrival times corresponding to each sensor from the calculated arrival times corresponding to each sensor to obtain the time residual value.

[0017] According to a specific implementation manner disclosed in the present application, the coal mine mining monitoring method further includes:

[0018] Obtain the cumulative deformation amount image corresponding to the second monitoring area through the synthetic aperture radar image pair corresponding to the second monitoring area, where the cumulative deformation amount image includes multiple deformation areas;

[0019] Perform superposition analysis on the mining right map corresponding to the second monitoring area and the cumulative deformation amount image, where the mining right map includes multiple authorized areas;

[0020] If any of the deformation areas is not completely within the authorized area, determine the corresponding deformation area as the first target area and output a second prompt message for coal mine mining exceeding the boundary, where the second prompt message includes the position information of the first target area.

[0021] According to a specific implementation manner disclosed in the present application, after the step of determining the corresponding deformation area as the first target area, the coal mine mining monitoring method further includes:

[0022] Determine each deformation area in the cumulative deformation amount image except the first target area as the second target area;

[0023] Overlay and analyze the mining face corresponding to the second monitoring area with all the second target areas;

[0024] If any of the second target areas is not completely within the mining face, output a third prompt message indicating that coal mine mining exceeds the boundary.

[0025] Second, an embodiment of the present application provides a coal mine mining monitoring device, and the coal mine mining monitoring device includes:

[0026] A signal monitoring module for monitoring microseismic signals corresponding to the first monitoring area, where the microseismic signals include the occurrence times of microseismic sources in the first monitoring area, and the observed arrival times and calculated arrival times of the microseismic waves corresponding to each microseismic source propagating to each sensor in the first monitoring area;

[0027] A time residual module for determining, based on the observed arrival times and the calculated arrival times of the microseismic waves corresponding to each microseismic source propagating to each sensor in the first monitoring area, that the microseismic source corresponding to the minimum time residual value is the target point;

[0028] A frequency acquisition module for acquiring the microseismic frequency and position information of the target point;

[0029] A first output module for outputting a first prompt message indicating that coal mine mining exceeds the layer if the microseismic frequency of the target point is greater than a preset threshold, where the first prompt message includes the position information of the target point.

[0030] According to a specific implementation manner disclosed in the present application, the time residual module is specifically applied to:

[0031] Obtain the calculated travel times of the microseismic waves from the microseismic source to each sensor;

[0032] Through the formula t ci =t0 + t ti (T i , S) calculate the calculated arrival times corresponding to each sensor, where t ci is the calculated arrival time corresponding to the i-th sensor, i≥1, t0 is the occurrence time of the microseismic source, and t ti (T i , S) is the calculated travel time corresponding to the i-th sensor, T i is the sensor parameter of the i-th sensor, and S is the source parameter of the microseismic source.

[0033] According to a specific implementation manner disclosed in the present application, the coal mine mining monitoring device further includes:

[0034] The deformation accumulation module is used to obtain the accumulated deformation amount image corresponding to the second monitoring area through the synthetic aperture radar image pair corresponding to the second monitoring area, where the accumulated deformation amount image includes multiple deformation areas;

[0035] The overlay analysis module is used to perform overlay analysis on the mining right map corresponding to the second monitoring area and the accumulated deformation amount image, where the mining right map includes multiple authorized areas;

[0036] The second output module is used to, if any of the deformation areas is not completely within the authorized area, determine the corresponding deformation area as the first target area and output the second prompt information for coal mine over-exploitation, where the second prompt information includes the location information of the first target area.

[0037] Compared with the prior art, the present application has the following beneficial effects:

[0038] The present application provides a coal mine mining monitoring method, device and computer equipment. The method includes: listening to the microseismic signals corresponding to the first monitoring area, where the microseismic signals include the occurrence times of each microseismic source in the first monitoring area, and the observed arrival times and calculated arrival times of the microseismic waves corresponding to each microseismic source propagating to each sensor in the first monitoring area; based on the observed arrival times and calculated arrival times of the microseismic waves corresponding to each microseismic source propagating to each sensor in the first monitoring area, determining the microseismic source corresponding to the minimum time residual value as the target point; collecting the microseismic frequency and location information of the target point; if the microseismic frequency of the target point is greater than a preset threshold, outputting the first prompt information for coal mine over-strata mining. The target point refers to the point with a relatively large vibration frequency in the first monitoring area, indicating that the current coal mine mining work may exceed the original coal seam and affect the coal seam corresponding to the first monitoring area. The present application judges the microseismic frequency of the target point through microseismic technology. If the microseismic frequency of the target point is greater than the preset threshold, the first prompt information for coal mine over-strata mining is output. Through the acquisition and calculation of the relevant data of the microseismic waves by the sensor, the limitation of coal mine mining by the coal seam geological conditions can be avoided, and the effect of real-time and accurate monitoring of coal mine mining can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the protection scope of the present invention. In each drawing, similar components are numbered similarly.

[0040] Figure 1 It is a schematic flowchart of a coal mine mining monitoring method provided by an embodiment of the present application;

[0041] Figure 2Schematic diagram of sensor layout involved in a coal mining monitoring method provided by an embodiment of the present application;

[0042] Figure 3 Schematic diagram of calculating the propagation speed of microseismic waves involved in a coal mining monitoring method provided by an embodiment of the present application;

[0043] Figure 4 Schematic diagram of superimposed analysis of a mining right map and an accumulated deformation amount image involved in a coal mining monitoring method provided by an embodiment of the present application;

[0044] Figure 5 One of the module block diagrams of a coal mining monitoring method device provided by an embodiment of the present application;

[0045] Figure 6 Another module block diagram of a coal mining monitoring method device provided by an embodiment of the present application. Detailed implementation manners

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0047] Generally, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0048] Hereinafter, the terms "including", "having" and their cognates that can be used in various embodiments of the present invention are only intended to represent specific features, numbers, steps, operations, elements, components or combinations of the foregoing items, and should not be construed as first excluding the existence of one or more other features, numbers, steps, operations, elements, components or combinations of the foregoing items or increasing the possibility of one or more features, numbers, steps, operations, elements, components or combinations of the foregoing items.

[0049] In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0050] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention pertain. Terms such as those defined in commonly used dictionaries will be interpreted to have the same meaning as the contextual meaning in the relevant technical field and will not be interpreted to have an idealized or overly formal meaning unless clearly defined in various embodiments of the present invention.

[0051] The following will, with reference to the accompanying drawings, elaborate on some embodiments of the present application. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0052] See Figure 1 , Figure 1 which is a schematic flowchart of a coal mine mining monitoring method provided by an embodiment of the present application. As Figure 1 shown, the coal mine mining monitoring method mainly includes:

[0053] Step S101, listening for microseismic signals corresponding to a first monitoring area, where the microseismic signals include the occurrence times of microseismic sources in the first monitoring area, and the observed arrival times and calculated arrival times of microseismic waves corresponding to each microseismic source propagating to each sensor in the first monitoring area.

[0054] The first monitoring area can be any area that needs to be monitored during the coal mine mining process. For example, during the coal mine mining process, the mining face will cover different coal seams. If a certain mining face covers three coal seams, namely seam No. 4, seam No. 5, and seam No. 6. Among them, the distance between seam No. 4 and seam No. 5 is 18 m, and the distance between seam No. 5 and seam No. 6 is 8 m. Currently, the planned coal seam to be mined is seam No. 6. At this time, other areas outside seam No. 6 can be set as the first monitoring area, such as seam No. 5. Sensors, such as microseismic instruments, can be installed on seam No. 5 to monitor the coal mine mining work in real time. If stratum fracture and fragmentation are detected, it proves the occurrence of coal mine overburden mining behavior.

[0055] See Figure 2 , Figure 2 which is a schematic diagram of sensor layout involved in a coal mine mining monitoring method provided by an embodiment of the present application. Corresponding to the above example, microseismic instruments can be arranged in the planned mining face of seam No. 5, and one sensor is installed at a preset distance from one end along the two long sides of the mining face. The microseismic signals monitored by this coal seam are transmitted back to the ground monitoring equipment through data transmission equipment. Specifically, during implementation, the preset distance can be 100 meters. Generally, at least four microseismic instruments are required to calculate the position of one seismic source. In order to have redundant observations, that is, observation margin, to achieve the purpose of inspection, at least 5 microseismic instruments can be arranged.

[0056] The observed arrival time refers to the time when the microseismic wave recorded by a certain sensor reaches the sensor. The calculated arrival time refers to the earthquake occurrence time of the microseismic source plus the time for the microseismic wave to propagate from the microseismic source to the sensor. And the calculated travel time refers to the time for the microseismic wave to propagate from the microseismic source to the sensor.

[0057] The steps for determining the calculated arrival time include:

[0058] Obtain the calculated travel time of the microseismic wave propagating from the microseismic source to each of the sensors;

[0059] Through the formula t ci = t0 + t ti (T i , S) calculate the calculated arrival time corresponding to each sensor, where t ci is the calculated arrival time corresponding to the i-th sensor, i≥1, t0 is the earthquake occurrence time of the microseismic source, t ti (T i , S) is the calculated travel time corresponding to the i-th sensor, T i is the sensor parameter of the i-th sensor, and S is the source parameter of the microseismic source.

[0060] In order to calculate the position of the microseismic source subsequently, the propagation speed of the microseismic wave in the coal seam can be obtained first. Refer to Figure 3 , Figure 3 which is a schematic diagram of the propagation speed calculation of the microseismic wave involved in a coal mine mining monitoring method provided by an embodiment of the present application. S(x0, y0, z0, t0) and T i (x i , y i , z i , t i ) respectively represent the microseismic source and the i-th sensor, where x0, y0, z0 and x i , y i , z i respectively represent the spatial coordinates of the microseismic source and the sensor, and t0 and t i respectively represent the earthquake occurrence time of the microseismic source and the waveform first arrival observed arrival time of the i-th sensor. S(x0, y0, z0, t0) is an artificially created microseismic source in advance, and i sensors are arranged around this microseismic source. Therefore, the spatial position of this artificially created microseismic source and the spatial positions of the surrounding sensors are known. By recording the earthquake occurrence time of the artificially created microseismic source and the observed arrival times reaching each sensor, the propagation speed of the microseismic wave in the coal seam can be solved, which is used to determine the spatial position of the microseismic source caused by coal mine mining in the subsequent coal seam.

[0061] Let the calculated arrival time of the i-th sensor be t ci , then tci It can be described by the following formula: t ci = t0 + t ti (T i , S) In this formula, S is the source parameter, denoted as S = (x0, y0, z0, t0)T; T i is the parameter of the i-th sensor, denoted as T i = (x i , y i , z i , t i )T, i = 1, 2,... n; t ti (T i , S) is the calculated travel time of the i-th sensor.

[0062] Step S102: Based on the observed arrival times and the calculated arrival times of the microseismic waves corresponding to each microseismic source propagating to each sensor in the first monitoring area, determine the microseismic source corresponding to the smallest time residual value as the target point.

[0063] The determination step of the time residual value includes:

[0064] Subtract the observed arrival time corresponding to each sensor from the calculated arrival time corresponding to each sensor to obtain the time residual value.

[0065] In specific implementation, the difference between the observed arrival time and the calculated arrival time recorded by the sensor can be denoted as the station residual or the time residual γ i , and of course it can also be called the station residual γ i , and it can be expressed by the following formula: γ i = t i - t ci = t i - (t0 + t ti (T i , S)). The degree of non - coincidence between the observed arrival time and the calculated arrival time of the sensors participating in the positioning can be represented by the time residual. The essence of microseismic source positioning is to take the microseismic source corresponding to the smallest time residual value in the first monitoring area as the target point. First, the time residual values corresponding to each sensor can be calculated, and then the minimum value can be selected from all the time residual values corresponding to all the sensors in the first monitoring area as the minimum time residual value. The smaller the time residual value, the higher the degree of coincidence between the observed arrival time and the calculated arrival time. The microseismic point corresponding to the smallest time residual value can be determined as a point in the first monitoring area that is more affected by vibration or representative.

[0066] Step S103: Collect the microseismic frequency and position information of the target point.

[0067] Corresponding to the example in step S101, the target point refers to a qualified microseismic source that appears within the range of the No. 5 coal seam during coal mining in the No. 6 coal seam. At this time, the target point only indicates that the current coal mining work has an impact on other coal seams. However, in specific implementation, if the vibration frequency of the target point is relatively small, the impact of the target point on the No. 5 coal seam can be ignored. Therefore, at this time, the microseismic frequency and position information of the target point can be collected, and further judgment can be made based on the microseismic frequency of the target point.

[0068] Step S104, if the microseismic frequency of the target point is greater than a preset threshold, output a first prompt message for over-layer coal mining, where the first prompt message includes the position information of the target point.

[0069] In specific implementation, the microseismic frequency of the No. 5 coal seam can be recorded before coal mining. After the No. 6 coal seam is mined, continue to record the microseismic frequency of the No. 5 coal seam. If the microseismic frequency of the No. 5 coal seam is monitored to exceed the preset threshold after the No. 6 coal seam is mined, it is considered that over-layer mining behavior has occurred during the mining of the No. 6 coal seam, resulting in frequent microseismic events and coal seam fractures in the No. 5 coal seam. In specific implementation, the preset threshold can be 130% of the microseismic frequency corresponding to the No. 5 coal seam when the No. 6 coal seam is not mined. The specific value can be customized according to the actual usage requirements and application scenarios of the user, and no specific limitation is made here.

[0070] If the microseismic frequency of the target point is greater than the preset threshold, output a first prompt message for over-layer coal mining. The first prompt message can be sent to the upper computer or the terminal device belonging to the user in the form of a short message, a broadcast, or a combination of multiple data, for prompting the illegal behavior of over-layer in the current coal mining work. Among them, the first prompt message includes the position information of the target point. In specific implementation, the acquisition of the position information can be before coal mining, after the target point is determined, or after the judgment step of "the microseismic frequency of the target point is greater than the preset threshold", and no further limitation is made here.

[0071] On the basis of the above embodiments, according to a specific implementation manner of the present application, an improved solution is further provided, which adds monitoring for overstepping the boundary during the coal mining process compared with the above implementation manner. Specifically, the coal mining monitoring method may further include:

[0072] Obtain a cumulative deformation amount image corresponding to the second monitoring area through the synthetic aperture radar image pair corresponding to the second monitoring area, where the cumulative deformation amount image includes multiple deformation areas;

[0073] Perform superposition analysis on the mining right map corresponding to the second monitoring area and the cumulative deformation amount image, where the mining right map includes multiple authorized areas;

[0074] If any of the deformation regions is not completely within the authorized region, determine the corresponding deformation region as the first target region and output a second prompt message indicating that coal mine exploitation exceeds the boundary.

[0075] In specific implementation, during the process of coal mine exploitation, in addition to possible over-layer exploitation, over-boundary exploitation may also occur. Over-boundary exploitation can cause disturbance to the coal seam strata, damaging the original stable stress structure and causing bending and settlement of the strata. The cumulative deformation amount of each second monitoring region can be obtained by using the Interferometric Synthetic Aperture Radar (InSAR) technology. By overlaying the cumulative deformation amount with the corresponding coal mine exploitation working face in the second monitoring region, it is analyzed whether there is over-boundary exploitation behavior. The InSAR technology has the advantages of all-weather, high resolution, high precision, low cost, and moderate data interval.

[0076] Preferably, since most coal mines are located in the wild and there are not a large number of evenly distributed high-coherence points, the SBAS-InSAR technology more suitable for less high-coherence points in the wild can be adopted. In specific implementation, free Sentinel data and the required external DEM data with a resolution of 30 meters can be downloaded, and the cumulative deformation amount of the second monitoring region can be obtained through the SBAS-InSAR technology.

[0077] See Figure 4 , Figure 4 FIG. is a schematic diagram of the superposition analysis of the mining right map and the cumulative deformation amount image involved in a coal mine exploitation monitoring method provided by an embodiment of the present application. After determining the cumulative deformation amount of the second monitoring region, the mining right map corresponding to the second monitoring region can be superimposed and analyzed with the cumulative deformation amount image. Figure 4 In, the area corresponding to the thick black line is the authorized region in the mining right map corresponding to the second monitoring region, as Figure 4 shown by A1 in; the shaded part is the deformation region in the cumulative deformation amount image corresponding to the second monitoring region, as Figure 4 shown by B1 in. If the cumulative deformation amount image corresponding to the second monitoring region is completely within the mining right map, it is determined that there is no non-compliant behavior of over-boundary exploitation in the coal mine exploitation work; if any deformation region is not completely within the corresponding authorized region, determine the corresponding deformation region as the first target region and output a second prompt message indicating that coal mine exploitation exceeds the boundary.

[0078] The above method of superimposing and analyzing the mining right map corresponding to the second monitoring region with the cumulative deformation amount image determines whether there is a large-scale over-boundary situation in coal mine exploitation. For small-scale over-boundary situations, it may not be accurately displayed. Therefore, after the step of determining the corresponding deformation region as the first target region, the coal mine exploitation monitoring method further includes:

[0079] Determine each deformation area except the first target area in the cumulative deformation amount image as the second target area;

[0080] Perform superposition analysis on the mining face corresponding to the second monitoring area and all the second target areas;

[0081] If any of the second target areas is not completely within the mining face, output a third prompt message indicating that coal mine mining exceeds the boundary.

[0082] In specific implementation, if the coal mining subsidence areas caused by coal mine mining are basically within the mining rights scope and there is no situation where the subsidence area appears outside the mining rights scope. In order to determine the mining face and the coal mine mining subsidence situation, it is possible to further analyze whether coal mining beyond the mining face occurs in each implementation stage. Determine each deformation area except the first target area in the cumulative deformation amount image as the second target area. If any of the second target areas is not completely within the mining face, output a third prompt message indicating that coal mine mining exceeds the boundary.

[0083] The coal mine mining monitoring method provided by this application can monitor the frequency of events such as minute cracks and fractures in the strata and the positions of microseismic sources. Compare the microseismic frequencies of coal seams that are not in the mining plan when there is no mining. If the microseismic frequency after mining is greater than the preset threshold, it can be determined that the current coal seam has the behavior of over-layer mining and the position of its seismic source can be located. Through the InSAR time series observation method, the surface settlement situation of the area to be monitored can be observed in a large range for a long time, and the surface deformation rate and cumulative deformation amount of this area can be obtained. Combining the corresponding coal mine mining rights map and the mining face, it is possible to identify whether the surface settlement caused by coal mine mining conforms to the planned mining process and scope from a large range to a refined level. This application is not restricted by the coal seam geological conditions and can realize real-time and accurate monitoring of coal mine mining.

[0084] Corresponding to the above method embodiment, refer to Figure 5 and the present invention also provides a coal mine mining monitoring device 500, the coal mine mining monitoring device 500 includes:

[0085] A signal listening module 501, configured to listen to the microseismic signals corresponding to the first monitoring area, where the microseismic signals include the earthquake occurrence times of each microseismic source in the monitoring area, and the observed arrival times and calculated arrival times of the microseismic waves corresponding to each microseismic source propagating to each sensor in the monitoring area;

[0086] A time residual module 502, configured to determine the microseismic source corresponding to the minimum time residual value as the target point based on the observed arrival times and the calculated arrival times of the microseismic waves corresponding to each microseismic source propagating to each sensor in the monitoring area;

[0087] A frequency acquisition module 503 is configured to acquire the microseismic frequency and position information of the target point;

[0088] A first output module 504 is configured to output a first prompt message indicating over-layer coal mining if the microseismic frequency of the target point is greater than a preset threshold, where the first prompt message includes the position information of the target point.

[0089] Specifically, when implemented, the time residual module is specifically applied to:

[0090] Obtain the calculated travel time of the microseismic wave from the microseismic source to each of the sensors;

[0091] Through the formula t ci = t0 + t ti (T i , S) calculate the calculated arrival time corresponding to each sensor, where t ci is the calculated arrival time corresponding to the i-th sensor, i≥1, t0 is the earthquake occurrence time of the microseismic source, t ti (T i , S) is the calculated travel time corresponding to the i-th sensor, T i is the sensor parameter of the i-th sensor, and S is the source parameter of the microseismic source.

[0092] Refer to Figure 6 , Figure 6 which is the second block diagram of the modules of a coal mining monitoring method device provided by an embodiment of the present application. Specifically, when implemented, the coal mining monitoring device 500 further includes:

[0093] A deformation accumulation module 505 is configured to obtain an accumulated deformation amount image corresponding to the second monitoring area through a pair of synthetic aperture radar images corresponding to the second monitoring area, where the accumulated deformation amount image includes a plurality of deformation areas;

[0094] An overlay analysis module 506 is configured to perform an overlay analysis on the mining right map corresponding to the second monitoring area and the accumulated deformation amount image, where the mining right map includes a plurality of authorized areas;

[0095] A second output module 507 is configured to, if any of the deformation areas is not completely within the authorized area, determine the corresponding deformation area as a first target area and output a second prompt message indicating overstepping the boundary in coal mining.

[0096] The coal mine mining monitoring device, computer equipment, and computer-readable storage medium provided by this application can monitor the frequencies of minor formation cracking, faulting, and other events and the locations of microseismic sources. By comparing the microseismic frequencies of coal seams not in the mining plan before and after mining, if the microseismic frequency after mining is greater than the preset threshold, it can be determined that out-of-seam mining behavior has occurred in the current coal seam and the location of its seismic source can be located. Through InSAR technology, the surface subsidence of the area to be monitored can be observed over a large range for a long time, and the surface deformation rate and cumulative deformation amount of this area can be obtained. Combining with the corresponding coal mine property map and mining working face, it is possible to identify in detail from a large range whether the surface subsidence caused by coal mine mining conforms to the planned mining process and scope. This application is not restricted by the geological conditions of the coal seam and can achieve real-time and accurate monitoring of coal mine mining.

[0097] For the specific implementation process of the coal mine mining monitoring device, computer equipment, and computer-readable storage medium provided by this application, reference can be made to the specific implementation process of the coal mine mining monitoring method provided in the above embodiments, which will not be elaborated here one by one.

[0098] In several embodiments provided by this application, it should be understood that the disclosed device and method can also be implemented in other ways. The device embodiments described above are merely illustrative. For example, the flowcharts and structure diagrams in the drawings show the possible architectures, functions, and operations of the device, method, and computer program product according to multiple embodiments of the present invention. In this regard, each block in the flowchart or block diagram can represent a module, program segment, or part of the code, and the module, program segment, or part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in alternative implementations, the functions marked in the blocks can occur in a different order than marked in the drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and sometimes they can also be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the structure diagram and / or flowchart, as well as the combination of blocks in the structure diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0099] In addition, each functional module or unit in various embodiments of the present invention can be integrated together to form an independent part, or each module can exist separately, or two or more modules can be integrated to form an independent part.

[0100] When the above-mentioned functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or a part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a smart phone, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs.

[0101] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A coal mine mining monitoring method, characterized in that, The coal mining monitoring method includes: Listening to the microseismic signals corresponding to the first monitoring area, where the microseismic signals include the seismic occurrence times of each microseismic source in the first monitoring area, and the observed arrival times and calculated arrival times of the microseismic waves corresponding to each microseismic source propagating to each sensor in the first monitoring area; the first monitoring area is an area other than the coal seam planned for mining; Based on the observed arrival times and the calculated arrival times of the microseismic waves corresponding to each microseismic source propagating to each sensor in the first monitoring area, determining the microseismic source corresponding to the minimum time residual value as the target point; Collecting the microseismic frequency and position information of the target point; If the microseismic frequency of the target point is greater than a preset threshold, outputting a first prompt message for coal mining exceeding the layer, where the first prompt message includes the position information of the target point.

2. The coal mine mining monitoring method according to claim 1, wherein The step of determining the calculated arrival time includes: Obtaining the calculated travel time of the microseismic wave propagating from the microseismic source to each sensor; Through the formula t ci = t0 + t ti (T i , S) to calculate the calculated time corresponding to each sensor, where t ci is the calculated time corresponding to the i-th said sensor, i≥1, t0 is the earthquake occurrence time of the microseismic source, t ti (T i , S) is the calculated travel time corresponding to the i-th said sensor, T i is the sensor parameter of the i-th said sensor, and S is the source parameter of the microseismic source.

3. The coal mine mining monitoring method according to claim 2, characterized in that, The step of determining the time residual value includes: Subtracting the observed arrival time corresponding to each sensor from the calculated arrival time corresponding to each sensor to obtain the time residual value.

4. The coal mining monitoring method according to claim 1, characterized in that, The coal mining monitoring method further includes: Obtaining a cumulative deformation amount image corresponding to the second monitoring area through a synthetic aperture radar image pair corresponding to the second monitoring area, where the cumulative deformation amount image includes multiple deformation areas; Performing superposition analysis on the mining right map corresponding to the second monitoring area and the cumulative deformation amount image, where the mining right map includes multiple authorized areas; If any of the deformation areas is not completely within the authorized area, determining the corresponding deformation area as the first target area and outputting a second prompt message for coal mining exceeding the boundary, where the second prompt message includes the position information of the first target area.

5. The coal mine mining monitoring method according to claim 4, characterized in that, After the step of determining the corresponding deformation area as the first target area, the coal mining monitoring method further includes: Determining each deformation area other than the first target area in the cumulative deformation amount image as the second target area; Performing superposition analysis on the mining face corresponding to the second monitoring area and all the second target areas; If any of the second target areas is not completely within the mining face, outputting a third prompt message for coal mining exceeding the boundary.

6. A coal mine mining monitoring device, characterized in that, The coal mining monitoring device includes: A signal listening module for listening to the microseismic signals corresponding to the first monitoring area, where the microseismic signals include the seismic occurrence times of each microseismic source in the first monitoring area, and the observed arrival times and calculated arrival times of the microseismic waves corresponding to each microseismic source propagating to each sensor in the first monitoring area; the first monitoring area is an area other than the coal seam planned for mining; A time residual module for determining the microseismic source corresponding to the minimum time residual value as the target point based on the observed arrival times and the calculated arrival times of the microseismic waves corresponding to each microseismic source propagating to each sensor in the first monitoring area; A frequency acquisition module for collecting the microseismic frequency and position information of the target point; A first output module, configured to output a first prompt message indicating over-layer coal mining if the microseismic frequency of the target point is greater than a preset threshold, where the first prompt message includes the position information of the target point.

7. The coal mine mining monitoring device according to claim 6, characterized in that, The time residual module is specifically configured to: Obtain the calculated travel times of microseismic waves propagating from the microseismic source to each of the sensors; Through the formula t ci = t0 + t ti (T i , S) to calculate the calculated time corresponding to each sensor, where t ci is the calculated time corresponding to the i-th said sensor, i≥1, t0 is the earthquake occurrence time of the microseismic source, t ti (T i , S) is the calculated travel time corresponding to the i-th said sensor, T i is the sensor parameter of the i-th said sensor, and S is the source parameter of the microseismic source.

8. The coal mine mining monitoring device according to claim 6, characterized in that, The coal mining monitoring device further includes: A deformation accumulation module, configured to obtain an accumulated deformation amount image corresponding to the second monitoring area through a pair of synthetic aperture radar images corresponding to the second monitoring area, where the accumulated deformation amount image includes a plurality of deformation areas; An overlay analysis module, configured to perform an overlay analysis on the mining right map corresponding to the second monitoring area and the accumulated deformation amount image, where the mining right map includes a plurality of authorized areas; A second output module, configured to, if any of the deformation areas is not completely within the authorized area, determine the corresponding deformation area as a first target area and output a second prompt message indicating over-boundary coal mining, where the second prompt message includes the position information of the first target area.

9. A computer device, characterized in that, The computer device includes a processor and a memory, and the memory stores a computer program, and when the computer program is executed on the processor, it implements the coal mining monitoring method according to any one of claims 1 to 5.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, and when the computer program is executed on a processor, it implements the coal mining monitoring method according to any one of claims 1 to 5.

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