Method and device for monitoring surface settlement of coal mine mining field and electronic equipment

Abstract

The invention discloses a monitoring method and device for surface settlement of a coal mine mining field and electronic equipment. The method comprises the following steps: acquiring coal seam trend and terrain information in a coal mine stope area; dividing a coal mine stope area on the basis of coal seam trend and terrain information to obtain a plurality of monitoring control networks; based on the multiple monitoring control networks, sampling monitoring is conducted on the coal mine stope area, at least one interferogram of the coal mine stope area is obtained, and the at least one interferogram is used for representing the earth surface time change condition of the coal mine stope area in time and space; and determining a ground surface settlement monitoring result of the coal mine stope area based on the at least one interferogram. According to the invention, the technical problem that monitoring of ground surface settlement of a coal mine stope is low in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the field of surface subsidence monitoring, and in particular to a method, device and electronic equipment for monitoring surface subsidence in a coal mine. Background Art

[0002] Coal mining can cause ground subsidence, which may lead to safety issues such as ground collapse and building damage. Therefore, it is necessary to monitor ground subsidence to ensure the safety of areas around coal mines. By monitoring the surface subsidence of coal mines, we can timely understand the impact of coal mining on surrounding areas, warn of potential safety hazards in advance, and ensure the safety and stability of areas around coal mines.

[0003] At present, the surface subsidence monitoring method in the relevant technology is usually suitable for application scenarios with small monitoring areas and high monitoring accuracy requirements. However, when monitoring surface subsidence in coal mines, the area of ​​the coal mines that need to be monitored is often large. When using traditional surface subsidence monitoring methods to monitor coal mine areas, the task volume is often large and the coverage rate of coal mine areas is low, which means that the monitoring of surface subsidence in coal mines is low.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiments of the present invention provide a method, device and electronic equipment for monitoring surface subsidence of a coal mine, so as to at least solve the technical problem of low level of monitoring surface subsidence of a coal mine in the related art.

[0006] According to one aspect of an embodiment of the present invention, a method for monitoring surface subsidence of a coal mine is provided, comprising: obtaining coal seam orientation and terrain information within a coal mine area; dividing the coal mine area into regions based on the coal seam orientation and terrain information to obtain a plurality of monitoring control networks; sampling and monitoring the coal mine area based on the plurality of monitoring control networks to obtain at least one interference map of the coal mine area, wherein at least one interference map is used to characterize surface temporal variation conditions of the coal mine area in time and space; and determining surface subsidence monitoring results of the coal mine area based on the at least one interference map.

[0007] Optionally, based on the coal seam direction and terrain information, the coal mine mining area is divided into regions to obtain multiple monitoring and control networks, including: determining multiple monitoring points based on the coal seam direction, wherein the multiple monitoring points are used to characterize the points in the coal mine mining area where surface subsidence monitoring is to be carried out; determining at least one benchmark point based on the terrain information; and determining multiple monitoring and control networks based on the multiple monitoring points and at least one benchmark point.

[0008] Optionally, multiple monitoring points are determined based on the direction of the coal seam, including: determining a first observation line and a second observation line based on the direction of the coal seam, wherein the first observation line is the same as the direction of the coal seam and the second observation line is perpendicular to the first observation line; multiple monitoring points are determined based on the first observation line and the second observation line.

[0009] Optionally, determining at least one benchmark point based on terrain information includes: acquiring points with known surface subsidence information in the coal mining area to obtain multiple initial benchmark points; and screening the multiple initial benchmark points based on the terrain information to obtain at least one benchmark point.

[0010] Optionally, multiple initial benchmark points are screened based on terrain information to obtain at least one benchmark point, including: determining terrain change gradients corresponding to the multiple initial benchmark points based on the terrain information; and screening multiple initial benchmark points based on the terrain change gradient and a preset gradient threshold to obtain at least one benchmark point.

[0011] Optionally, based on multiple monitoring and control networks, sampling monitoring is performed on the coal mine mining area to obtain at least one interference map of the coal mine mining area, including: satellite monitoring of the coal mine mining area to obtain multiple initial interference maps; based on multiple monitoring and control networks, radar monitoring of the coal mine mining area to obtain multiple synthetic aperture radar images of the coal mine mining area; based on multiple initial interference maps and multiple synthetic aperture radar images, at least one interference map is generated.

[0012] According to another aspect of an embodiment of the present invention, a monitoring device for surface subsidence of a coal mine mining area is also provided, including: an acquisition module, used to obtain coal seam direction and terrain information within the coal mine mining area; a division module, used to divide the coal mine mining area into regions based on the coal seam direction and terrain information, and obtain multiple monitoring control networks; a monitoring module, used to sample and monitor the coal mine mining area based on multiple monitoring control networks, and obtain at least one interference map of the coal mine mining area, wherein at least one interference map is used to characterize the surface time change status of the coal mine mining area in time and space; a determination module, used to determine the surface subsidence monitoring result of the coal mine mining area based on at least one interference map.

[0013] According to another aspect of an embodiment of the present invention, there is further provided an electronic device, comprising: a memory storing an executable program; and a processor for running the program, wherein the method in each embodiment of the present invention is executed when the program is running.

[0014] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium includes a stored executable program, wherein when the executable program is running, the device where the computer-readable storage medium is located is controlled to execute the methods in various embodiments of the present invention.

[0015] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0016] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0017] According to another aspect of the embodiments of the present invention, a computer program is further provided. When the computer program is executed by a processor, the methods in the embodiments of the present invention are implemented.

[0018] In an embodiment of the present invention, a method for monitoring surface subsidence of a coal mine is provided, comprising: obtaining coal seam orientation and terrain information in a coal mine area; dividing the coal mine area into regions based on the coal seam orientation and terrain information to obtain multiple monitoring control networks; sampling and monitoring the coal mine area based on multiple monitoring control networks to obtain at least one interference map of the coal mine area, wherein at least one interference map is used to characterize the surface time change condition of the coal mine area in time and space; and determining the surface subsidence monitoring result of the coal mine area based on at least one interference map. It is easy to notice that the present application can effectively improve the coverage and density of monitoring points by obtaining the coal seam orientation and terrain information in the coal mine area, dividing the coal mine area into regions, and establishing multiple monitoring control networks, thereby improving the monitoring efficiency. By establishing multiple monitoring control networks, sampling and monitoring the coal mine area, and obtaining at least one interference map, the surface time change condition of the coal mine area can be more comprehensively characterized, and the monitoring precision and accuracy can be improved. Coal seam direction and terrain information can be used to establish multiple monitoring and control networks to achieve comprehensive monitoring of coal mining areas, improve monitoring coverage and efficiency, and thus solve the technical problem of low monitoring of surface subsidence in coal mining areas in related technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 is a flow chart of a method for monitoring surface subsidence in a coal mine according to an embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of an optional layout of the first observation line and the second observation line according to an embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of a monitoring device for surface subsidence in a coal mine according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only 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 should fall within the scope of protection of the present invention.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] According to one aspect of an embodiment of the present invention, a method for monitoring surface subsidence in a coal mine is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in an order different from that shown here.

[0026] Figure 1 FIG. 1 is a flow chart of a method for monitoring surface subsidence in a coal mine according to an embodiment of the present invention. Figure 1 As shown, the method comprises the following steps:

[0027] Step S102, obtaining coal seam trend and topographic information in the coal mine area.

[0028] The above-mentioned coal mining area may refer to the regional scope of coal mining, or may refer to the area above the ground surface corresponding to coal mining. The coal mining area may be determined according to actual needs and is not limited here.

[0029] The above-mentioned coal seam trend may refer to the occurrence of the coal seam, that is, the direction and dip of the coal seam.

[0030] The above-mentioned terrain information may refer to the topography, landform, topography and other conditions of the coal mining area. The terrain information may include the ups and downs of the ground, the flatness or steepness of the terrain and other features.

[0031] In an optional embodiment, in the process of monitoring the surface settlement of the coal mine, different monitoring technologies and instruments can be used to monitor and analyze the surface settlement of the mining area in real time, so as to timely discover and control the surface settlement. The coal seam trend and terrain information in the coal mine area can be obtained first. Specifically, the direction and geological structure information of the underground coal seam in the coal mine can be obtained through geological exploration means, including geological drilling, groundwater exploration, etc. The surface of the coal mine is measured by ground measurement technology, such as total station, positioning equipment, etc., to obtain the surface topography and terrain information. In the process of underground coal mining, the underground coal seam is mined, and the surface monitoring is continuously carried out to understand the surface settlement. Through the above steps, the accuracy and timeliness of the surface settlement monitoring work of the coal mine can be ensured, the underground coal seam trend and terrain information of the coal mine can be effectively mastered, and data reference basis can be provided for coal mine production.

[0032] Step S104, based on the coal seam trend and terrain information, the coal mine area is divided into regions to obtain multiple monitoring and control networks.

[0033] In an optional embodiment, the surface settlement of the coal mine can be monitored and recorded in real time by monitoring equipment, such as positioning equipment, inclinometers, displacement sensors, etc., to ensure that the surface settlement changes of the coal mine will not affect the coal mining operation and the surrounding environment. For the surface settlement monitoring of the coal mine, the coal mine area can be divided into regions according to the coal seam trend and terrain information, and then multiple monitoring control networks are obtained. Specifically, the trend information of the underground coal seam in the coal mine can be obtained through geological exploration and measurement, including the inclination of the coal seam, the distribution of the coal seam, etc. The topography and topography of the surface of the coal mine can be measured and analyzed, including surface undulations, topographic features, etc. Then, according to the coal seam trend and topographic information, the coal mine area can be divided into multiple monitoring areas, each of which contains one or more monitoring points. A monitoring control network can be set in each monitoring area to determine the location and layout of the monitoring point, and select appropriate monitoring equipment for monitoring. According to the coal seam trend and terrain information, the regional division can more accurately determine the location of the monitoring point and improve the monitoring accuracy. Dividing the coal mining area into multiple monitoring areas and setting up monitoring control networks can effectively improve monitoring efficiency and reduce monitoring costs. Dividing the coal mining area based on the coal seam trend and terrain information and setting up multiple monitoring control networks can effectively improve monitoring accuracy, efficiency and real-time performance, and ensure the accuracy and timeliness of surface subsidence monitoring in coal mining areas.

[0034] Step S106: Based on multiple monitoring and control networks, sampling and monitoring are performed on the coal mine area to obtain at least one interference map of the coal mine area.

[0035] Among them, at least one interference pattern is used to characterize the surface time change status of the coal mine stope area in time and space.

[0036] The at least one interferogram mentioned above may refer to a technology for monitoring surface subsidence, and surface deformation information obtained through satellite remote sensing and radar interferometry technology. Specifically, the interferogram can be an image obtained by interferometry processing two or more images obtained by satellite sensors, which is used to show the deformation of the surface in time and space. In the interferogram, different colors represent different surface deformation conditions. When subsidence occurs on the surface, the interferogram will show color changes within a certain range, and the subsidence of the surface can be quantified by this change. By analyzing the interferogram, information such as the subsidence rate, range and trend of the surface can be understood.

[0037] In an optional embodiment, during the monitoring process of surface settlement of a coal mine, multiple monitoring control networks can be used to monitor the coal mine area, and the monitoring control networks can be distributed at different locations around the coal mine to ensure that the surface settlement of the entire mine area is fully monitored. Specifically, monitoring points can be arranged at different locations around the coal mine, and these monitoring points can be fixed points on the ground or underground measuring points. These monitoring points can accurately record the settlement of the surface. After the monitoring points are arranged, monitoring data can be collected regularly to record the settlement of the surface, and these data can be obtained by measuring instruments or remote sensing technology. The collected monitoring data can be processed to obtain the surface settlement of the coal mine area. Then, the processed monitoring data can be used to draw an interference map of the coal mine area, that is, an image reflecting the surface settlement. The interference map can help intuitively understand the surface changes in the coal mine area, and at least one interference map of the coal mine area can be obtained to characterize the surface time changes in the coal mine area in time and space. Through the deployment of multiple monitoring and control networks, the surface changes in the coal mine area can be fully monitored, including the settlement of different locations, providing a reference for coal mine production. By processing monitoring data and drawing interference maps, the surface changes in the coal mine area can be more intuitively understood, providing support for coal mine management and safe production. By monitoring the coal mine area and drawing interference maps based on multiple monitoring and control networks, the surface settlement of the coal mine area can be more comprehensively understood, providing scientific basis and technical support for coal mine production.

[0038] Step S108, determining the surface subsidence monitoring result of the coal mine area based on at least one interference pattern.

[0039] The above-mentioned surface subsidence monitoring results may refer to the data and analysis results obtained after real-time or regular monitoring of surface subsidence in coal mines. Surface subsidence monitoring can be carried out through fixed-point observation, remote sensing technology, ground measurement and other means, which can timely understand the situation of surface subsidence, predict possible problems and take corresponding measures to ensure safe production in coal mines.

[0040] In an optional embodiment, in the process of monitoring the surface settlement of the coal mine, interferometric measurement technology can be used for monitoring. Interferometric measurement is a measurement method based on the principle of coherence, which measures the displacement or deformation of the target surface by comparing the phase difference of two or more waves. Specifically, first, an interference pattern of the coal mine area can be obtained by using a suitable radar or satellite interferometric measurement instrument, and the interference pattern can reflect the surface deformation information collected at different time points. These interference patterns are processed, and the displacement information of the surface is obtained by calculating the phase difference. Finally, at least one interference pattern can be used to determine the surface settlement monitoring results of the coal mine area. By comparing the interference patterns at different time points, the settlement of the surface can be obtained, including information such as the settlement rate and the settlement range. Interferometric measurement technology can be used to realize real-time monitoring of the surface settlement of the coal mine, and timely discover potential geological disaster risks. Interferometric measurement technology has high precision and high resolution, can accurately measure the surface settlement, and provide reliable data support for the safe production of coal mines, and can provide data technology support for the safe production of coal mines.

[0041] In an embodiment of the present invention, a method for monitoring surface subsidence of a coal mine is provided, comprising: obtaining coal seam orientation and terrain information in a coal mine area; dividing the coal mine area into regions based on the coal seam orientation and terrain information to obtain multiple monitoring control networks; sampling and monitoring the coal mine area based on multiple monitoring control networks to obtain at least one interference map of the coal mine area, wherein at least one interference map is used to characterize the surface time change condition of the coal mine area in time and space; and determining the surface subsidence monitoring result of the coal mine area based on at least one interference map. It is easy to notice that the present application can effectively improve the coverage and density of monitoring points by obtaining the coal seam orientation and terrain information in the coal mine area, dividing the coal mine area into regions, and establishing multiple monitoring control networks, thereby improving the monitoring efficiency. By establishing multiple monitoring control networks, sampling and monitoring the coal mine area, and obtaining at least one interference map, the surface time change condition of the coal mine area can be more comprehensively characterized, and the monitoring precision and accuracy can be improved. Coal seam direction and terrain information can be used to establish multiple monitoring and control networks to achieve comprehensive monitoring of coal mining areas, improve monitoring coverage and efficiency, and thus solve the technical problem of low monitoring of surface subsidence in coal mining areas in related technologies.

[0042] Optionally, based on the coal seam direction and terrain information, the coal mine mining area is divided into regions to obtain multiple monitoring and control networks, including: determining multiple monitoring points based on the coal seam direction, wherein the multiple monitoring points are used to characterize the points in the coal mine mining area where surface subsidence monitoring is to be carried out; determining at least one benchmark point based on the terrain information; and determining multiple monitoring and control networks based on the multiple monitoring points and at least one benchmark point.

[0043] In an optional embodiment, the coal mine stope area can be divided into regions to determine the layout of the monitoring control network. According to the coal seam trend and terrain information, the coal mine stope area can be divided into different monitoring areas, and the location of the monitoring points can be determined. Specifically, multiple monitoring points can be determined according to the coal seam trend and the stope layout, and these monitoring points are used to characterize the points to be monitored for surface subsidence in the coal mine stope area. The selection of monitoring points can take into account factors such as coal seam mining conditions, geological structures and surface characteristics to ensure the accuracy and reliability of monitoring data. At least one reference point can be determined in the monitoring area to refer to the changes in the monitoring points. The reference point can be selected in a geologically stable area to ensure the stability of the monitoring data. Then, multiple monitoring control networks can be determined based on multiple monitoring points and at least one reference point. The layout of the monitoring control network can take into account factors such as the distribution of monitoring points, geological characteristics and monitoring requirements to ensure the comprehensiveness and representativeness of the monitoring data. By reasonably setting monitoring points and reference points, the surface subsidence of the coal mine stope can be accurately monitored, providing reliable data support for the monitoring of surface deformation during mining. Through regional division and multi-point monitoring, the surface subsidence of coal mining sites can be comprehensively monitored, helping mine managers understand the surface subsidence and providing support and protection for coal mining operations and safe production.

[0044] Optionally, multiple monitoring points are determined based on the direction of the coal seam, including: determining a first observation line and a second observation line based on the direction of the coal seam, wherein the first observation line is the same as the direction of the coal seam and the second observation line is perpendicular to the first observation line; multiple monitoring points are determined based on the first observation line and the second observation line.

[0045] In an optional embodiment, the first observation line and the second observation line can first be determined based on the direction of the coal seam. The first observation line is the same as the direction of the coal seam, so that the main direction of the coal seam mining area can be covered; the second observation line is perpendicular to the first observation line, so that monitoring can be carried out in different directions to more comprehensively grasp the surface subsidence. Then, multiple monitoring points can be determined based on the first observation line and the second observation line. When determining the monitoring points, monitoring points can be set at different locations according to the specific conditions and geological characteristics of coal seam mining. Through the above steps, comprehensive monitoring of surface subsidence in coal mines can be achieved, surface subsidence can be discovered in time, and monitoring data support can be provided for safe production in coal mines. Through monitoring in different directions, the surface subsidence can be more comprehensively understood, and corresponding measures can be taken in time to ensure the safety and stability of coal mining.

[0046] Optionally, determining at least one benchmark point based on terrain information includes: acquiring points with known surface subsidence information in the coal mining area to obtain multiple initial benchmark points; and screening the multiple initial benchmark points based on the terrain information to obtain at least one benchmark point.

[0047] In an optional embodiment, in the process of determining the reference point, firstly, the point position where the surface subsidence information in the coal mine mining area is known can be obtained, which can be obtained through field measurement or remote sensing technology. Then, these initial reference points are screened by terrain information, and at least one representative reference point is selected. The terrain information includes factors such as topography, landform, and geological structure. Through the comprehensive analysis of this information, an area with relatively flat and stable terrain can be found as a reference point. The selection of the reference point is more important for the accuracy of the monitoring data. By screening based on the terrain information, a relatively stable point can be found to better reflect the surface subsidence. By screening out at least one reference point, the monitoring data can be collected and analyzed more quickly, abnormal surface subsidence can be discovered in time, and production safety can be guaranteed.

[0048] Optionally, multiple initial benchmark points are screened based on terrain information to obtain at least one benchmark point, including: determining terrain change gradients corresponding to the multiple initial benchmark points based on the terrain information; and screening multiple initial benchmark points based on the terrain change gradient and a preset gradient threshold to obtain at least one benchmark point.

[0049] In an optional embodiment, in the process of screening multiple initial benchmark points, the terrain change gradient corresponding to the multiple initial benchmark points can be determined based on the terrain information. The terrain change between different points can be determined by high-precision measurement and terrain analysis of the surface, and the terrain change gradient of each point can be obtained. Then, multiple initial benchmark points can be screened based on the terrain change gradient and the preset gradient threshold. By setting a gradient threshold, qualified benchmark points can be screened out to obtain at least one benchmark point. This gradient threshold can be adjusted according to actual conditions to ensure that the selected benchmark point has a relatively stable terrain change. In the above process, qualified benchmark points can be screened out more accurately through the analysis of terrain information and terrain change gradient, thereby improving the accuracy of monitoring data. By setting the gradient threshold for screening, multiple initial benchmark points can be automatically screened, which can save manpower and time costs, improve monitoring efficiency, timely discover surface subsidence, and ensure the safety of mine production.

[0050] Optionally, based on multiple monitoring and control networks, sampling monitoring is performed on the coal mine mining area to obtain at least one interference map of the coal mine mining area, including: satellite monitoring of the coal mine mining area to obtain multiple initial interference maps; based on multiple monitoring and control networks, radar monitoring of the coal mine mining area to obtain multiple synthetic aperture radar images of the coal mine mining area; based on multiple initial interference maps and multiple synthetic aperture radar images, at least one interference map is generated.

[0051] In an optional embodiment, the coal mine stope area can be sampled and monitored based on multiple monitoring and control networks. Specifically, first, through satellite monitoring technology, high-resolution image data of the coal mine stope area can be obtained to obtain multiple initial interference graphs, which can be used to identify and monitor the surface subsidence and serve as the basic data for subsequent analysis. Then, radar monitoring technology can be used to monitor the coal mine stope area, and high-resolution synthetic aperture radar images can be obtained. The radar image can provide more detailed surface subsidence information, including parameters such as surface deformation and subsidence rate. Finally, based on multiple initial interference graphs and multiple synthetic aperture radar images, data fusion and processing can be performed to generate at least one more accurate interference graph, and the obtained interference graph can more comprehensively reflect the surface subsidence of the coal mine stope area, providing more reliable data support for subsequent analysis and decision-making. Through the above steps, comprehensive monitoring and analysis of surface subsidence in the coal mine stope can be achieved, the accuracy and reliability of monitoring can be improved, and more effective technical support can be provided for coal mine production safety and environmental protection.

[0052] The technical solution proposed in this application is described below in combination with an optional embodiment. This application proposes a method for monitoring surface subsidence in a coal mine, which belongs to the field of mining engineering technology. The method for monitoring surface subsidence in a coal mine includes the following steps: setting monitoring points, determining the location of the monitoring line according to the direction of the coal seam in the coal mine area, and selecting the layout form of the monitoring station; setting multiple groups of monitoring points. Benchmark point layout, setting benchmark points in large gradient subsidence areas and places that are not conducive to electromagnetic wave propagation, in a relatively stable position that is convenient for subsidence monitoring; using the benchmark points as the starting point, the coal mine subsidence monitoring zone is divided into several areas; with the advancement of construction progress and the visibility of the construction site, temporarily adding benchmark points. Control network construction, connecting the monitoring points with the benchmark points to form a closed or attached route; setting appropriate time baseline and space baseline thresholds; monitoring once every 12 days according to the satellite revisit cycle, and can also be determined according to actual needs. Generate an interference map. Use two scenes to obtain interference pairs before and after deformation to generate an interference map. Generate an interference map and then simulate the fringe map of terrain phase based on the external digital elevation model of the study area without deformation phase. Remove the terrain phase information inverted by the known digital elevation model from the interference map to calculate the surface deformation information. Finally, you can also check and review. After each monitoring of the elevation benchmark network, check and review the monitoring results, verify the various tolerances, and after confirming that all meet the specified requirements, perform adjustment calculations on the monitoring data to obtain the current elevation value. Calculate the stage settlement through the elevation value, compare it with the monitoring results, and compile the settlement monitoring report for each measuring point.

[0053] The stability standard of the benchmark point can be that the difference in elevation after each measurement adjustment is less than 1mm. There can be two monitoring lines, namely monitoring line A, which can be along the strike direction of the coal seam, and monitoring line B can be along the dip direction, and they are perpendicular to each other and intersect. The monitoring results can be measured by real-time relative positioning technology of the navigation satellite system or trigonometric height measurement.

[0054] The interference pattern phase in this application It can be determined according to the following calculation formula:

[0055]

[0056] in, This is the flat earth effect phase, which can be removed by accurately calculating the baseline length; It is the terrain phase, which can be removed by external digital elevation model simulation; The phase formed by the orbit error can be eliminated by using the precise orbit data of the two monitoring images; They are the atmospheric delay phase and the phase caused by noise, which can be removed to a certain extent by filtering methods to separate the required deformed phase Then the deformation is obtained through phase unwrapping, phase-elevation conversion, geocoding and other processes;

[0057] The number of interference patterns M is calculated as follows:

[0058]

[0059] Where: M is the number of interference patterns; N is the number of synthetic aperture radar (SAR) images.

[0060] This application can select the corresponding satellite access time according to the subsidence area, and set up corresponding monitoring stations in the part where large gradient subsidence may occur. However, monitoring is seriously affected by multipath effects near water pools and densely built areas. Try to perform leveling during satellite access and perform trigonometric height measurement in places with large surface undulations. In order to timely understand the surface subsidence caused by underground operations, ensure the safety of the land above the working surface, surrounding roads and buildings, and guide underground construction, effective monitoring must be carried out. The results of on-site monitoring are used for information feedback to optimize the design, so that the design can achieve the goals of high quality, safety, economic rationality, and fast construction. The monitoring data can be used to determine whether the underground operations that have been carried out meet the expected requirements, so as to determine and optimize the later operation plans, and achieve dynamic design and information construction. By monitoring and collecting data, experience is accumulated for similar engineering design, construction and the formulation of related regulations.

[0061] In this application, the horizontal movement value and settlement value of the surface above the underground operation are used to grasp the surface deformation in real time. Monitoring points are set in areas with large settlement values ​​or severe obstruction; it is very important to reasonably select the layout form of the monitoring station according to the purpose of setting up the station. At present, most mining areas in my country use profile line monitoring stations. The specific layout form of the monitoring station; the monitoring station generally consists of two monitoring lines. One is along the strike direction of the coal seam, and the other is along the dip direction. They are perpendicular to each other and intersect; under the condition that the surface is fully mined, the monitoring line can be set through the flat bottom part of the mobile basin. Under the condition that the surface has not been fully mined, the monitoring line must be set on the main section of the mobile basin.

[0062] The images used in this application try to maintain a certain overlapping area to reduce the impact of the spatial baseline. And select experienced operators to process in order to obtain more reliable results. Benchmark point layout: large gradient subsidence areas or places that are not conducive to electromagnetic wave propagation. The layout of benchmark points is convenient for subsidence monitoring and relatively stable. They can be temporarily added as the construction progresses and the visibility of the construction site is improved; the control network tries to form a closed or attached route to verify the leveling or trigonometric height measurement results. Monitoring is carried out every 12 days according to the satellite revisit cycle. The benchmark point stability standard is that the elevation difference after each measurement adjustment is less than 1mm. When the data is abnormal, re-measure immediately. The elevation benchmark network is monitored to meet the accuracy of third-class leveling.

[0063] After each monitoring of the elevation reference network in this application, the monitoring results are checked and reviewed, and various limit errors are verified. After confirming that all meet the specified requirements, the monitoring data is adjusted to obtain the current elevation value. The settlement amount during the elevation calculation stage is compared with the Interferometric Synthetic Aperture Radar (InSAR) monitoring results, and a settlement monitoring report for each measuring point is compiled based on the working conditions.

[0064] According to another aspect of an embodiment of the present invention, a device for monitoring surface subsidence of a coal mine is also provided. The device can execute the method for monitoring surface subsidence of a coal mine of the above embodiment. The specific implementation method and preferred application scenario are the same as those of the above embodiment and will not be described in detail here.

[0065] Figure 2 is a schematic diagram of an optional layout of the first observation line and the second observation line according to an embodiment of the present invention, such as Figure 2 As shown, optional layout methods of the first observation line and the second observation line in various scenarios are demonstrated, including the first observation line 1 and the second observation line 2. The second observation line can be perpendicular to the first observation line, and then based on different areas determined by the first observation line and the second observation line, which can be different quadrants determined by the first observation line and the second observation line, multiple monitoring points can be further determined. The settings of the first observation line and the second observation line can also be determined according to actual needs, which is not limited here.

[0066] Figure 3 is a schematic diagram of a monitoring device for surface subsidence in a coal mine according to an embodiment of the present application, such as Figure 3 As shown, the device includes the following: an acquisition module 302 , a division module 304 , a monitoring module 306 and a determination module 308 .

[0067] Among them, the acquisition module is used to obtain the coal seam direction and terrain information in the coal mine mining area; the division module is used to divide the coal mine mining area into regions based on the coal seam direction and terrain information, and obtain multiple monitoring and control networks; the monitoring module is used to sample and monitor the coal mine mining area based on multiple monitoring and control networks, and obtain at least one interference map of the coal mine mining area, wherein at least one interference map is used to characterize the surface time change conditions of the coal mine mining area in time and space; the determination module is used to determine the surface subsidence monitoring results of the coal mine mining area based on at least one interference map.

[0068] Among them, the division module is also used to determine multiple monitoring points based on the direction of the coal seam, wherein the multiple monitoring points are used to characterize the points in the coal mine mining area where surface subsidence monitoring is to be carried out; determine at least one benchmark point based on terrain information; and determine multiple monitoring control networks based on multiple monitoring points and at least one benchmark point.

[0069] Among them, the division module is also used to determine the first observation line and the second observation line based on the coal seam trend, wherein the first observation line is the same as the coal seam trend, and the second observation line is perpendicular to the first observation line; based on the first observation line and the second observation line, multiple monitoring points are determined.

[0070] Among them, the division module is also used to obtain points with known surface subsidence information in the coal mine mining area to obtain multiple initial benchmark points; and screen the multiple initial benchmark points based on terrain information to obtain at least one benchmark point.

[0071] Among them, the division module is also used to determine the terrain change gradient corresponding to multiple initial benchmark points based on terrain information; based on the terrain change gradient and the preset gradient threshold, multiple initial benchmark points are screened to obtain at least one benchmark point.

[0072] Among them, the monitoring module is also used to perform satellite monitoring of the coal mine mining area to obtain multiple initial interference patterns; based on multiple monitoring and control networks, radar monitoring of the coal mine mining area is performed to obtain multiple synthetic aperture radar images of the coal mine mining area; based on multiple initial interference patterns and multiple synthetic aperture radar images, at least one interference pattern is generated.

[0073] An embodiment of the present application further provides an electronic device, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods in various embodiments of the present invention when running.

[0074] The above-mentioned memory may refer to a device inside a computer for storing data and programs, and may include memory, hard disk, etc., wherein the memory may be used to temporarily store running programs and data, the hard disk may be used to store programs and data for a long time, and the memory may be used to enable the computer to read and write data, and execute programs; the above-mentioned processor may be responsible for executing instructions in computer programs and performing data processing, and may be responsible for controlling and executing various operations, including arithmetic operations, logical operations, data transmission, etc.

[0075] An embodiment of the present application further provides a computer-readable storage medium, which includes a stored executable program, wherein when the executable program is running, the device where the computer-readable storage medium is located is controlled to execute the methods in various embodiments of the present invention.

[0076] The above-mentioned computer storage medium may refer to a medium in a computer memory used to store certain discontinuous physical quantities. Computer storage media mainly include semiconductors, magnetic cores, magnetic drums, magnetic tapes, laser disks, etc.; the stored program included in the computer-readable storage medium may be a set of instructions that can be recognized and executed by a computer, running on an electronic computer, and is an information tool that meets certain needs of people.

[0077] An embodiment of the present application further provides a computer program product, including a computer program, which implements the methods in various embodiments of the present invention when executed by a processor.

[0078] The above-mentioned computer program product may refer to a software program that has been written, tested and released and can be run on a computer or other device. The computer program product may include an application, an operating system, tool software, etc., which is used to implement specific functions or solve specific problems.

[0079] An embodiment of the present application further provides a computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium is used to store a computer program, and when the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0080] The above-mentioned non-volatile computer-readable storage medium may refer to a medium for storing data. The non-volatile computer-readable storage medium can keep the data from being lost when the power is off, and can be used to store long-term data, such as operating systems, applications, and user files. The non-volatile storage medium may include hard disk drives, solid-state drives, optical disks, and flash memory storage devices, etc.

[0081] The embodiments of the present application further provide a computer program, which implements the methods in the above-mentioned embodiments of the present invention when executed by a processor.

[0082] The above-mentioned computer program may refer to a collection of instructions used to tell a computer to perform a specific task or operation. A computer program may be written by a programmer using a specific programming language and may include algorithms, data structures, logic, and control flows. A computer program may be used for a variety of purposes, including application software, operating systems, and the like.

[0083] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0084] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0085] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0086] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0087] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software 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, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0088] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for monitoring surface subsidence in a coal mine, characterized in that: include: Obtain coal seam trend and topographic information within the coal mining area; Based on the coal seam trend and the topographic information, the coal mine area is divided into regions to obtain multiple monitoring and control networks; Based on the multiple monitoring and control networks, sampling and monitoring are performed on the coal mine stope area to obtain at least one interference map of the coal mine stope area, wherein the at least one interference map is used to characterize the surface time change status of the coal mine stope area in time and space; The surface subsidence monitoring result of the coal mine stope area is determined based on the at least one interference pattern.

2. The method for monitoring surface subsidence of a coal mine according to claim 1, characterized in that: Based on the coal seam trend and the topographic information, the coal mine area is divided into regions to obtain multiple monitoring and control networks, including: Determine a plurality of monitoring points based on the coal seam trend, wherein the plurality of monitoring points are used to characterize the points in the coal mine stope area where surface subsidence monitoring is to be performed; Determine at least one reference point based on the terrain information; Based on the multiple monitoring points and the at least one reference point, the multiple monitoring control networks are determined.

3. The method for monitoring surface subsidence of a coal mine according to claim 2, characterized in that: Based on the coal seam trend, multiple monitoring points are determined, including: Determine a first observation line and a second observation line based on the coal seam trend, wherein the first observation line is in the same direction as the coal seam, and the second observation line is perpendicular to the first observation line; The plurality of monitoring points are determined based on the first observation line and the second observation line.

4. The method for monitoring surface subsidence of a coal mine according to claim 3, characterized in that: Determining at least one reference point based on the terrain information includes: Acquire points where surface subsidence information is known in the coal mine stope area to obtain multiple initial reference points; The multiple initial reference points are screened based on the terrain information to obtain the at least one reference point.

5. The method for monitoring surface subsidence of a coal mine according to claim 4, characterized in that: The method further comprises: screening the plurality of initial reference points based on the terrain information to obtain the at least one reference point, comprising: Based on the terrain information, determining the terrain change gradients corresponding to the multiple initial reference points; Based on the terrain change gradient and a preset gradient threshold, the multiple initial reference points are screened to obtain the at least one reference point.

6. The method for monitoring surface subsidence of a coal mine according to claim 1, characterized in that: Based on the multiple monitoring and control networks, sampling and monitoring are performed on the coal mine stope area to obtain at least one interference map of the coal mine stope area, including: Conduct satellite monitoring of the coal mine stope area to obtain a plurality of initial interference maps; Based on the multiple monitoring and control networks, radar monitoring is performed on the coal mine stope area to obtain multiple synthetic aperture radar images of the coal mine stope area; The at least one interferogram is generated based on the plurality of initial interferograms and the plurality of synthetic aperture radar images.

7. A monitoring device for surface subsidence in a coal mine, characterized in that: include: An acquisition module is used to obtain the coal seam trend and topographic information in the coal mine area; A division module, used for dividing the coal mine area based on the coal seam trend and the terrain information to obtain multiple monitoring and control networks; A monitoring module, configured to perform sampling monitoring on the coal mine stope area based on the multiple monitoring and control networks, and obtain at least one interference graph of the coal mine stope area, wherein the at least one interference graph is used to characterize the surface time variation of the coal mine stope area in time and space; A determination module is used to determine the surface subsidence monitoring result of the coal mine stope area based on the at least one interference pattern.

8. An electronic device, characterized in that: include: A memory storing an executable program; A processor is used to run the program, wherein when the program is run, the method for monitoring surface subsidence of a coal mine site as described in any one of claims 1 to 6 is executed.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored executable program, wherein when the executable program is run, the device where the storage medium is located is controlled to execute the method for monitoring surface subsidence of a coal mine site as described in any one of claims 1 to 6.

10. A computer program product, characterized in that It comprises a computer program, which, when executed by a processor, implements the method for monitoring surface subsidence of a coal mine according to any one of claims 1 to 6.

Images