Method and device for determining the range of coal mining under buildings in a coal mining subsidence area
By dividing the coal mining area into blocks and deleting blocks that exceed the threshold, and combining this with a surface subsidence prediction model, the balance between resource and building protection in coal mining was solved, thereby maximizing mining benefits and improving efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TIANDI SCI & TECH CO LTD
- Filing Date
- 2023-08-08
- Publication Date
- 2026-07-10
Smart Images
Figure CN116892390B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of coal mining technology, and in particular to a method and apparatus for determining the mining range of coal under buildings in a coal mining subsidence area. Background Technology
[0002] After coal mining, goaf areas are formed. When the goaf area is large enough, the overlying rock strata move, causing surface deformation. This process is also known as surface movement. Surface movement can cause varying degrees of damage to structures in the goaf area.
[0003] In order to minimize the losses caused by coal mining subsidence, it is necessary to predict the surface movement and deformation that will occur during the mining process before mining begins, and determine the actual mining area based on the prediction results.
[0004] In recent years, with the continuous improvement and maturation of mathematical models, tasks such as automatic processing of actual data in coal mining areas and automatic mapping of subsidence prediction data have been achieved through mathematical models.
[0005] Although mathematical models can reduce the workload for researchers in predicting surface movement and deformation caused by coal mining, researchers still need to make continuous adjustments when determining coal mining schemes in order to find a relatively balanced scheme between extracting as much coal resources as possible and the impact of surface movement and deformation caused by mining on buildings, so as to meet the need for maximizing production efficiency. Summary of the Invention
[0006] This invention provides a method and apparatus for determining the mining range of coal under buildings in a coal mining subsidence area. It addresses the shortcomings of existing technologies in determining mining schemes, which struggle to balance the impact of extracted coal resources and surface movement and deformation caused by mining on buildings. This invention provides a method for determining the mining range of coal mines that facilitates maximizing production efficiency.
[0007] This invention provides a method for determining the mining area of coal under buildings in a coal mining subsidence zone, including:
[0008] Obtain the buildings within the mining subsidence influence range of the working face, divide the working face into multiple blocks, and determine the surface movement and deformation data of the buildings after coal mining in each block;
[0009] If the sum of the surface movement deformation data corresponding to all the blocks is greater than a preset threshold, the blocks are deleted sequentially until the sum of the surface movement deformation data corresponding to the remaining blocks is less than or equal to the preset threshold.
[0010] According to the present invention, a method for determining the mining area of coal under buildings in a coal mining subsidence zone includes the step of sequentially deleting the blocks until the sum of the surface movement and deformation data corresponding to the remaining blocks is less than or equal to the preset threshold.
[0011] The blocks are sorted and deleted sequentially according to the land movement deformation data corresponding to the blocks in descending order, until the sum of the land movement deformation data corresponding to the remaining blocks is less than or equal to the preset threshold.
[0012] According to the present invention, a method for determining the mining range of coal under buildings in a coal mining subsidence area includes the step of determining the surface movement and deformation data at the building after each mining block, comprising:
[0013] The geological and mining conditions and mining parameters of the segment are input into the surface subsidence prediction model to obtain the surface movement and deformation data output by the surface subsidence prediction model.
[0014] According to the present invention, a method for determining the mining area of coal under buildings in a coal mining subsidence zone includes the following steps: inputting the geological and mining conditions and mining parameters of the subdivided area into a surface subsidence prediction model to obtain the surface movement and deformation data output by the surface subsidence prediction model.
[0015] The coordinates of the working face and the building are converted into a coordinate system with the coal seam strike as the positive x-axis and the coal seam dip as the positive y-axis.
[0016] The coordinates of the working face after transformation, the coordinates of the building after transformation, the geological and mining conditions of the block, and the mining parameters are input into the surface subsidence prediction model to obtain the surface movement and deformation data output by the surface subsidence prediction model.
[0017] According to a method for determining the mining area of coal under buildings in a coal mining subsidence zone provided by the present invention, before the step of sequentially deleting the blocks when the sum of the surface movement and deformation data corresponding to all the blocks is greater than a preset threshold, the method further includes:
[0018] Determine the coal mining damage level corresponding to the protection level of the building, wherein the protection level and the coal mining damage level are pre-associated;
[0019] The preset threshold is obtained based on the preset surface movement and deformation data corresponding to the coal mining damage level, and the coal mining damage level is pre-associated with the preset surface movement and deformation data.
[0020] According to the method for determining the mining range of coal under buildings in a coal mining subsidence area provided by the present invention, before the step of obtaining the buildings within the mining subsidence influence range of the working face, the method further includes:
[0021] Determine the rectangle based on the maximum and minimum values on each coordinate axis of the corner points of all working surfaces;
[0022] Based on the rectangular frame, determine the mining subsidence impact range of all working faces.
[0023] The present invention also provides a device for determining the mining range of coal under buildings in a coal mining subsidence area, comprising:
[0024] The module determines the buildings within the mining subsidence influence range of the working face, divides the working face into multiple blocks, and determines the surface movement and deformation data of the buildings after coal mining in each block.
[0025] The selection module, when the sum of the surface movement deformation data corresponding to all the blocks is greater than a preset threshold, sequentially deletes the blocks until the sum of the surface movement deformation data corresponding to the remaining blocks is less than or equal to the preset threshold.
[0026] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for determining the mining range of coal under buildings in a coal mining subsidence area as described above.
[0027] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for determining the mining range of coal under buildings in a coal mining subsidence area as described above.
[0028] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the method for determining the mining range of coal under buildings in a coal mining subsidence area as described above.
[0029] This invention provides a method and apparatus for determining the mining area of buildings under coal mining subsidence zones. The method involves dividing a pre-defined working face into multiple blocks during coal mining, calculating the surface movement and deformation data of buildings within the mining subsidence impact range of each block, and sequentially deleting blocks if the surface movement and deformation data corresponding to the working face exceeds a preset threshold for the buildings. This process continues until the sum of the surface movement and deformation data corresponding to the remaining blocks is less than or equal to the preset threshold. In other words, this method preserves as many coal mining working faces as possible while protecting buildings within the mining subsidence impact range from damage caused by coal mining, thereby maximizing mining profits. Attached Figure Description
[0030] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0031] Figure 1 This is one of the flowcharts illustrating the method for determining the mining area of coal under buildings in a coal mining subsidence area provided by the present invention.
[0032] Figure 2 This is a schematic diagram mainly used to show the working face and blocks in the method for determining the mining range of coal under buildings in the coal mining subsidence area provided by the present invention;
[0033] Figure 3 This is the second flowchart illustrating the method for determining the mining area of coal under buildings in a coal mining subsidence area provided by the present invention.
[0034] Figure 4 This is a schematic diagram used to illustrate the determination of the mining range of coal under buildings in the coal mining subsidence area provided by the present invention, mainly used to show the working face after deleting blocks.
[0035] Figure 5 This is a schematic diagram of the device for determining the mining range of coal under buildings in a coal mining subsidence area provided by the present invention.
[0036] Figure 6 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation
[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.
[0038] First, let's introduce the following:
[0039] Coal, as a primary energy source, has played a significant role in the development of the national economy. However, at the same time, the surface subsidence caused by coal mining has become a problem that needs to be addressed. When the area of the goaf caused by coal mining is large enough, it will lead to surface movement and deformation, resulting in various environmental and resource problems, and may even trigger corresponding geological disasters.
[0040] In order to minimize the losses caused by mining subsidence, it is necessary to make an accurate prediction of the surface movement and deformation that will occur during the mining process before coal mining begins. The prediction results will serve as an important basis for judging whether surface buildings need to be reinforced, repaired, or relocated and rebuilt. Different treatment measures correspond to different costs.
[0041] In the design of mining faces involving coal-bearing structures, in order to extract enough coal resources while protecting surface structures as much as possible, it is necessary to continuously adjust the mining plan or propose corresponding surface structure reinforcement methods to meet the above two conditions. This work involves the replanning of the mining area, adjustment of the working face, modification of expected parameters, and deformation resistance design, etc. The whole process is quite complicated, time-consuming and labor-intensive.
[0042] Previous research in this area has primarily focused on accurately acquiring surface movement and deformation data. The main difference between various calculation methods lies in the mathematical models used. For irregular working faces, there are equivalent transformation line integral algorithms, trapezoidal segmentation algorithms, triangular partitioning methods, rectangular segmentation algorithms, and so on, each with its own emphasis on applicable conditions. In recent years, with the continuous improvement and maturation of mathematical models, optimizing data pre- and post-processing has become a major task. Functions such as automatic processing of measured data and automatic mapping of subsidence prediction data have saved considerable workload and improved work efficiency. However, there is currently limited research on automatically designing working faces. When seeking a reasonable mining scheme, researchers always need to continuously try and fail, seeking a relative balance between resource extraction and meeting the requirements of surface movement and deformation to maximize production efficiency.
[0043] The following is combined with Figures 1-4 The present invention describes a method for determining the mining area of coal under buildings in a coal mining subsidence zone, such as... Figure 1 As shown, the methods for determining the mining area of coal under buildings in coal mining subsidence zones include:
[0044] Step 101: Obtain the buildings within the mining subsidence influence range of the working face, divide the working face into multiple blocks, and determine the surface movement and deformation data of the buildings after coal mining in each block;
[0045] The working face is the operational area during coal mining, where workers extract and transport coal. The working face is pre-determined based on the layout of the coal mine to be mined.
[0046] After coal mining, the surface around the mining area will move and deform, while the surface outside this area will be less affected.
[0047] Therefore, the area where coal mining causes surface movement and deformation is called the mining subsidence impact area, and buildings located within the mining subsidence area are buildings affected by coal mining.
[0048] Optionally, the mining subsidence impact range after coal mining can be determined using the working face as the calculation benchmark, and this can be used to determine the buildings located within the mining subsidence impact range.
[0049] Optionally, there can be one or more working faces.
[0050] When there is only one working face, the mining subsidence impact range is determined based on that working face.
[0051] When there are multiple working faces, a mining influence range can be determined for each working face, and the mining influence ranges corresponding to all working faces can be summarized as the total mining influence range; alternatively, a preset area can be determined first, in which all working faces are located, and then the total mining influence range corresponding to all working faces can be determined based on the preset area, so as to avoid missing buildings affected by coal mining as much as possible.
[0052] After determining the scope of mining subsidence impact of the working face, the working face is divided into multiple blocks, and the impact data of each block on the surface movement and deformation of buildings within the mining subsidence impact range are determined.
[0053] Optionally, the shape of the blocks can be the same as or different from the working surface.
[0054] For example, when the working surface is rectangular, the shape of the blocks can be a rectangle with the same aspect ratio as the working surface, or it can be a square.
[0055] Optionally, the shapes of the blocks can be the same or different.
[0056] Preferably, such as Figure 2 As shown, in order to facilitate the calculation of the impact of each block on the ground surface movement and deformation at the building, the working surface in this application is rectangular, and the blocks have the same shape, which is square.
[0057] It should be noted that the buildings within the mining subsidence area include one or more structures.
[0058] When there are multiple buildings, calculate and record the impact data of each block on the surface movement and deformation at each building location.
[0059] Optionally, the surface movement and deformation data include surface subsidence data, surface tilt deformation data, and surface horizontal deformation data. The impact of coal mining on surface movement and deformation at the building location is described by the surface subsidence value, surface tilt deformation value, and surface horizontal deformation value at the building location.
[0060] Step 102: If the sum of the surface movement deformation data corresponding to all the blocks is greater than a preset threshold, delete the blocks sequentially until the sum of the surface movement deformation data corresponding to the remaining blocks is less than or equal to the preset threshold.
[0061] The sum of surface movement and deformation data corresponding to all blocks, that is, the surface movement and deformation data of a certain building within the mining subsidence area after the mining of the coal mine.
[0062] If the sum of these surface movement and deformation data exceeds a preset threshold, it is assumed that the building will be damaged by surface movement and deformation caused by coal mining, and therefore the coal mine within the working face cannot be fully mined.
[0063] Based on this, select certain blocks within the working face for mining. Specifically, delete blocks sequentially according to a preset order until the sum of the surface movement and deformation data corresponding to the remaining blocks is less than or equal to a preset threshold.
[0064] In other words, while ensuring that the building is not damaged by ground movement and deformation, as many blocks as possible are preserved, thereby preserving the largest possible mining area, in order to achieve a balance between building protection and maximizing economic benefits.
[0065] Optionally, if the surface movement deformation data is less than or equal to a preset threshold, it means that the surface subsidence data, surface tilt deformation data, and surface horizontal deformation data at the building are all less than or equal to the corresponding preset thresholds.
[0066] Optionally, the preset order can be either the size order of the surface movement deformation data corresponding to the blocks or the positional order of the blocks.
[0067] In one feasible implementation, blocks are deleted sequentially according to the surface movement and deformation data corresponding to the blocks in descending order, and the blocks with the largest number are retained to maximize mining benefits without damaging the buildings.
[0068] In another feasible implementation, blocks are deleted sequentially according to their position relative to the building. For example, blocks closer to the building have a greater impact on the subsidence value in the surface movement deformation data at the building location, while blocks closer to the building have a greater impact on the tilt deformation data in the surface movement deformation data at the building location. Therefore, a set of blocks farthest and closest to the building are deleted sequentially until the sum of the surface movement deformation data corresponding to the remaining blocks is less than or equal to a preset threshold. Deleting blocks in this way can concentrate the location of the remaining blocks as much as possible, facilitating subsequent mining operations, reducing mining costs, and maximizing mining profits.
[0069] Optionally, the preset threshold is determined based on the building structure and / or building type.
[0070] In one feasible implementation, a preset threshold is determined based on the type of building. For example, when a building is a nationally protected cultural relic or a super high-rise building, its protection level is higher and the preset threshold is lower; when a building is an ordinary wooden load-bearing house, its protection level is lower and the preset threshold is higher.
[0071] In another feasible implementation, a preset threshold is determined based on the building's structure. For example, when the building is a reinforced concrete structure, it can withstand a higher degree of ground deformation, and the corresponding preset threshold is higher; when the building is a regular wood structure, it can withstand a lower degree of ground deformation, and the corresponding preset threshold is lower.
[0072] In addition, the building's own support structure also affects the degree of surface deformation that the building can withstand. Based on the actual type and structure of the building, a corresponding preset threshold can be determined for each building within the mining subsidence area.
[0073] Optionally, the number of working faces may be determined based on the actual distribution of coal mines.
[0074] Based on this, this application does not limit the number of blocks. The more blocks there are, the smaller the surface movement and deformation data corresponding to each block, and the larger the working surface area retained after deleting blocks. The fewer blocks there are, the smaller the surface movement and deformation data corresponding to each block, and the simpler the calculation process for the surface movement and deformation data of each block.
[0075] This invention divides a pre-defined working face in coal mining into multiple blocks, calculates the surface movement and deformation data of buildings within the mining subsidence impact range of each block, and deletes blocks sequentially when the surface movement and deformation data of the working face exceeds a preset threshold for the buildings, until the sum of the surface movement and deformation data of the remaining blocks is less than or equal to the preset threshold. In other words, while protecting buildings within the mining subsidence impact range from damage due to coal mining, this invention preserves as many coal mining working faces as possible, thereby maximizing mining profits.
[0076] In the method for determining the mining area of coal under buildings in a coal mining subsidence zone of the present invention, the step of sequentially deleting the blocks until the sum of the surface movement and deformation data corresponding to the remaining blocks is less than or equal to the preset threshold includes:
[0077] The blocks are sorted and deleted sequentially according to the land movement deformation data corresponding to the blocks in descending order, until the sum of the land movement deformation data corresponding to the remaining blocks is less than or equal to the preset threshold.
[0078] Specifically, the blocks are deleted sequentially according to the surface movement and deformation data corresponding to the blocks in descending order, so as to retain as many blocks as possible and thus maximize the area of the retained working surface.
[0079] It should be noted that since the surface movement and deformation data includes surface subsidence data, surface tilt deformation data, and surface horizontal deformation data, the surface movement and deformation data need to be preprocessed during sorting.
[0080] In one feasible implementation, the preprocessing includes sorting the surface subsidence data, surface tilt deformation data, and surface horizontal deformation data corresponding to each block to generate three arrays. In each data item, data is deleted in descending order until the sum of the surface subsidence data, the sum of the surface tilt deformation data, and the sum of the surface horizontal deformation data corresponding to the remaining blocks does not exceed the corresponding preset threshold.
[0081] In another feasible implementation, the preprocessing includes performing a weighted average of the surface subsidence data, surface tilt deformation data, and surface horizontal deformation data of each block and summing the results to obtain the comprehensive surface horizontal deformation data of each block. Blocks are then deleted in descending order of the comprehensive surface horizontal deformation data until the comprehensive surface horizontal deformation data of the remaining blocks is less than the corresponding preset threshold.
[0082] This invention deletes blocks sequentially according to the surface movement and deformation data from largest to smallest, thereby maximizing the working face range corresponding to the retained blocks, which in turn enables the extraction of more coal resources and maximizes mining profits.
[0083] In the method for determining the mining range of coal under buildings in a coal mining subsidence area according to the present invention, the step of determining the surface movement and deformation data at the building after each of the mining blocks includes:
[0084] The geological and mining conditions and mining parameters of the segment are input into the surface subsidence prediction model to obtain the surface movement and deformation data output by the surface subsidence prediction model.
[0085] Geological and mining conditions include the mining height corresponding to the block, the maximum mining depth of the working face, the coal seam dip angle, and the coal seam dip direction; mining parameters include the subsidence coefficient corresponding to the working face, the tangent of the main influence angle, the horizontal movement coefficient, the mining influence propagation angle, and the inflection point offset.
[0086] Optionally, the site mining conditions are obtained in advance through geological exploration.
[0087] Optionally, the mining parameters are determined according to the predetermined coal mining plan.
[0088] After inputting the geological and mining conditions and mining parameters of each block into the surface subsidence prediction model, the model outputs the surface movement and deformation data generated at the building location for each block based on the equivalent transformation line integral algorithm.
[0089] Optionally, each parameter in the geological mining conditions and mining parameters can be stored as an array for later retrieval and analysis.
[0090] Optionally, each block is numbered, and the surface movement and deformation data output by the model are associated with each block through the number.
[0091] Furthermore, if the minable surface range corresponding to the retained blocks is not continuous or the minable range is too small, the mining method can be modified, such as changing longwall mining to thickness-limited mining or strip mining, and the mining parameters can be re-determined. These parameters can then be input into the surface subsidence prediction model to determine the retained blocks and the corresponding minable range, until the minable surface range corresponding to the retained blocks achieves a balance between the economic benefits of coal mining and the costs and difficulties of coal mining.
[0092] In the method for determining the mining range of coal under buildings in a coal mining subsidence area according to the present invention, the step of inputting the geological mining conditions and mining parameters of the segmented area into a surface subsidence prediction model to obtain the surface movement and deformation data output by the surface subsidence prediction model includes:
[0093] The coordinates of the working face and the building are converted into a coordinate system with the coal seam strike as the positive x-axis and the coal seam dip as the positive y-axis.
[0094] The strike of a coal seam refers to the direction in which the coal seam extends on the earth's surface, while the dip of a coal seam refers to the angle between the coal seam and the horizontal plane. The strike and dip of a coal seam are perpendicular to each other.
[0095] When exploring and obtaining geological and mining conditions, relevant data are recorded using a coordinate system established with the strike of the coal seam as the positive x-axis and the dip direction of the coal seam as the positive y-axis.
[0096] Therefore, to facilitate calculation, the coordinates of the working face and the building are transformed from the planar coordinate system to a coordinate system with the coal seam strike as the positive x-axis and the coal seam dip as the positive y-axis. This ensures that all data input into the model use the same coordinate system, thereby eliminating the complex calculation process caused by the dip value parameter.
[0097] The coordinates of the working surface include the coordinates of the corner points of the working surface, as well as the coordinates of the corner points of each block.
[0098] The coordinates of the working face after transformation, the coordinates of the building after transformation, the geological and mining conditions of the block, and the mining parameters are input into the surface subsidence prediction model to obtain the surface movement and deformation data output by the surface subsidence prediction model.
[0099] The coordinates of the working face after transformation, the coordinates of the building after transformation, the geological and mining conditions of the block, and the mining parameters are input into the surface subsidence prediction model to obtain the surface movement and deformation data output by the surface subsidence prediction model, which is the surface movement and deformation data of each block at the building.
[0100] It should be noted that, when calculating the surface movement and deformation data, this application calculates the surface movement and deformation data of the building location for each 1-meter-thick coal seam for each block, and uses this data as the surface movement and deformation data corresponding to that block.
[0101] Optionally, such as Figure 3 As shown, the calculation of surface movement and deformation data for each block and the deletion of blocks are achieved based on a GIS (Geographic Information System). Specifically, by integrating GIS with a subsidence prediction mathematical model, and based on relevant analysis and prediction data, the calculation results are displayed spatially and intuitively using GIS; GIS components are used to analyze the patterns of surface movement and deformation.
[0102] Specifically, the preparation module is used for data entry, including the number of working faces, the coordinates of each corner of the working face, mining parameters, and geological and mining conditions data, which are stored in the form of arrays.
[0103] The surface impact range calculation module is used to determine the mining subsidence impact range corresponding to the working face, and then to determine the buildings within the mining subsidence and the coordinates of the buildings.
[0104] The working surface segmentation module is used to divide the working surface into multiple blocks and determine the angular coordinates of each block.
[0105] The coordinate transformation module is used to transform the coordinates of the working surface and the building.
[0106] In the deformation calculation module, the input data and the converted coordinates are calculated. The surface subsidence prediction model in the deformation calculation module outputs the surface movement deformation data caused by each 1m thick layer at the building in each block, and establishes a correspondence between the output data and each block.
[0107] The sorting module is used to sort the blocks according to the size of the surface movement and deformation data. If the sum of the surface movement and deformation data corresponding to a block is greater than a preset threshold, the blocks are deleted in descending order until the sum of the surface movement and deformation data corresponding to the remaining blocks is no greater than the preset threshold. All remaining blocks are then retained as the actual mineable range of the coal mine.
[0108] It should be noted that since this application uses a coordinate system corresponding to the dip and strike of the coal seam for calculation, after the calculation is completed, it is necessary to convert the corner coordinates of all working faces, the corner coordinates of blocks, and the corner coordinates of buildings back to the plane coordinate system.
[0109] The output module generates tables of surface movement and deformation data for each building and plots contour maps, as shown in the example below. Figure 4 As shown.
[0110] Specifically, Figure 4 The large positive direction in the diagram represents two working faces, the circles represent buildings within the mining subsidence influence range, and each small square represents a block. The positions in the working face that do not contain small squares are the deleted blocks, and the remaining positions are the actual mineable range.
[0111] If coal mining is completed within the actual mineable area, it will not cause damage to the corresponding buildings.
[0112] Optionally, such as Figure 4 As shown, after deleting the blocks, the remaining working faces are mostly irregular polygons, while the actual working faces are usually rectangular. Therefore, based on the retained blocks, the corresponding working faces for actual mining can be determined again to facilitate the commencement of coal mining operations.
[0113] Optionally, the actual working face area during mining may be smaller than the reserved block, so as to avoid accidentally mining coal in locations outside the reserved block, which could lead to damage to buildings.
[0114] In the method for determining the mining area of coal under buildings in a coal mining subsidence zone of the present invention, before the step of sequentially deleting the blocks when the sum of the surface movement and deformation data corresponding to all the blocks is greater than a preset threshold, the method further includes:
[0115] Determine the coal mining damage level corresponding to the protection level of the building, wherein the protection level and the coal mining damage level are pre-associated;
[0116] Specifically, the protection level of the building shall refer to Article 21 of the "Specifications for the Retention of Coal Pillars and Coal Mining under Pressure in Buildings, Water Bodies, Railways and Main Shafts", as shown in Table 1 below:
[0117] Table 1
[0118]
[0119] Furthermore, referring to Article 20 of the "Specifications for the Retention of Coal Pillars and Coal Mining under Pressure in Buildings, Water Bodies, Railways and Main Shafts", the degree of mining damage is divided into four levels. The four levels of inclined deformation are: Level I 0~3mm / m, Level II 3~6mm / m, Level III 6~10mm / m, and Level V greater than 10mm / m; the four levels of horizontal deformation are: Level I 0~2mm / m, Level II 2~4mm / m, Level III 4~6mm / m, and Level V greater than 6mm / m.
[0120] Optionally, the sinking value data is divided into four levels based on experience.
[0121] Optionally, protection levels can be pre-associated with coal mining damage levels based on experience.
[0122] Based on this, each type of building in the category of mining subsidence impact range has its corresponding coal mining damage level.
[0123] The preset threshold is obtained based on the preset surface movement and deformation data corresponding to the coal mining damage level, and the coal mining damage level is pre-associated with the preset surface movement and deformation data.
[0124] Furthermore, based on the preset surface movement and deformation data corresponding to the coal mine mining damage level, namely the tilt deformation value, horizontal deformation value and subsidence value corresponding to each level in the above specifications, the preset threshold is obtained.
[0125] Optionally, since the surface movement and deformation data corresponding to each level is a data range, in one feasible implementation, the middle value in the data range is selected as the preset threshold corresponding to that level; in another feasible implementation, the minimum value in the data range is selected as the preset threshold corresponding to that level to ensure the safety of the building.
[0126] In the method for determining the mining range of coal under buildings in a coal mining subsidence area of the present invention, before the step of obtaining the buildings within the mining subsidence influence range of the working face, the method further includes:
[0127] Determine the rectangle based on the maximum and minimum values on each coordinate axis of the corner points of all working surfaces;
[0128] The working face may include one or more.
[0129] When there are multiple working surfaces, obtain the maximum and minimum values on each coordinate axis of the corner points of all working surfaces, i.e., xmin, xmax, ymin, and ymax, to determine the bounding box. The coordinate system at this time is a planar coordinate system.
[0130] The coordinates of the four corner points of the rectangle are (xmin, ymin), (xmin, ymax), (xmax, ymin), and (xmax, ymax).
[0131] The rectangular frame determined in this way can cover all working faces, thereby maximizing the impact range of mining subsidence determined by the rectangular frame and ensuring that no potentially damaged buildings are overlooked.
[0132] Based on the rectangular frame, determine the mining subsidence impact range of all working faces.
[0133] Optionally, the range within a preset mining influence radius from the boundary of the rectangular frame can be used as the mining subsidence influence range.
[0134] The preset mining impact radius is determined based on experience.
[0135] The following describes the device for determining the mining range of coal under buildings in a coal mining subsidence area provided by the present invention. The device for determining the mining range of coal under buildings in a coal mining subsidence area described below can be referred to in correspondence with the method for determining the mining range of coal under buildings in a coal mining subsidence area described above.
[0136] like Figure 5 As shown, the device for determining the mining range of coal under buildings in a coal mining subsidence area according to the present invention includes a determining module 501 and a selecting module 502:
[0137] The determination module 501 is used to acquire buildings within the mining subsidence influence range of the working face, divide the working face into multiple blocks, and determine the surface movement and deformation data of the buildings after coal mining in each block.
[0138] The working face is the operational area during coal mining, where workers extract and transport coal. The working face is pre-determined based on the layout of the coal mine to be mined.
[0139] After coal mining, the surface around the mining area will move and deform, while the surface outside this area will be less affected.
[0140] Therefore, the area where coal mining causes surface movement and deformation is called the mining subsidence impact area, and buildings located within the mining subsidence area are buildings affected by coal mining.
[0141] Optionally, the mining subsidence impact range after coal mining can be determined using the working face as the calculation benchmark, and this can be used to determine the buildings located within the mining subsidence impact range.
[0142] Optionally, there can be one or more working faces.
[0143] When there is only one working face, the mining subsidence impact range is determined based on that working face.
[0144] When there are multiple working faces, a mining influence range can be determined for each working face, and the mining influence ranges corresponding to all working faces can be summarized as the total mining influence range; alternatively, a preset area can be determined first, in which all working faces are located, and then the total mining influence range corresponding to all working faces can be determined based on the preset area, so as to avoid missing buildings affected by coal mining as much as possible.
[0145] After determining the scope of mining subsidence impact of the working face, the working face is divided into multiple blocks, and the impact data of each block on the surface movement and deformation of buildings within the mining subsidence impact range are determined.
[0146] Optionally, the shape of the blocks can be the same as or different from the working surface.
[0147] For example, when the working surface is rectangular, the shape of the blocks can be a rectangle with the same aspect ratio as the working surface, or it can be a square.
[0148] Optionally, the shapes of the blocks can be the same or different.
[0149] Preferably, such as Figure 2 As shown, in order to facilitate the calculation of the impact of each block on the ground surface movement and deformation at the building, the working surface in this application is rectangular, and the blocks have the same shape, which is square.
[0150] It should be noted that the buildings within the mining subsidence area include one or more structures.
[0151] When there are multiple buildings, calculate and record the impact data of each block on the surface movement and deformation at each building location.
[0152] Optionally, the surface movement and deformation data include surface subsidence data, surface tilt deformation data, and surface horizontal deformation data. The impact of coal mining on surface movement and deformation at the building location is described by the surface subsidence value, surface tilt deformation value, and surface horizontal deformation value at the building location.
[0153] The selection module 502 is used to sequentially delete the blocks when the sum of the surface movement deformation data corresponding to all the blocks is greater than a preset threshold, until the sum of the surface movement deformation data corresponding to the remaining blocks is less than or equal to the preset threshold.
[0154] The sum of surface movement and deformation data corresponding to all blocks, that is, the surface movement and deformation data of a certain building within the mining subsidence area after the mining of the coal mine.
[0155] If the sum of these surface movement and deformation data exceeds a preset threshold, it is assumed that the building will be damaged by surface movement and deformation caused by coal mining, and therefore the coal mine within the working face cannot be fully mined.
[0156] Based on this, select certain blocks within the working face for mining. Specifically, delete blocks sequentially according to a preset order until the sum of the surface movement and deformation data corresponding to the remaining blocks is less than or equal to a preset threshold.
[0157] In other words, while ensuring that the building is not damaged by ground movement and deformation, as many blocks as possible are preserved, thereby preserving the largest possible mining area, in order to achieve a balance between building protection and maximizing economic benefits.
[0158] Optionally, if the surface movement deformation data is less than or equal to a preset threshold, it means that the surface subsidence data, surface tilt deformation data, and surface horizontal deformation data at the building are all less than or equal to the corresponding preset thresholds.
[0159] Optionally, the preset order can be either the size order of the surface movement deformation data corresponding to the blocks or the positional order of the blocks.
[0160] In one feasible implementation, blocks are deleted sequentially according to the surface movement and deformation data corresponding to the blocks in descending order, and the blocks with the largest number are retained to maximize mining benefits without damaging the buildings.
[0161] In another feasible implementation, blocks are deleted sequentially according to their position relative to the building. For example, blocks closer to the building have a greater impact on the subsidence value in the surface movement deformation data at the building location, while blocks closer to the building have a greater impact on the tilt deformation data in the surface movement deformation data at the building location. Therefore, a set of blocks farthest and closest to the building are deleted sequentially until the surface movement deformation data corresponding to the remaining blocks is less than a preset threshold. Deleting blocks in this way can concentrate the location of the remaining blocks as much as possible, facilitating subsequent mining operations, reducing mining costs, and maximizing mining profits.
[0162] Optionally, the preset threshold is determined based on the building structure and / or building type.
[0163] In one feasible implementation, a preset threshold is determined based on the type of building. For example, when a building is a nationally protected cultural relic or a super high-rise building, its protection level is higher and the preset threshold is lower; when a building is an ordinary wooden load-bearing house, its protection level is lower and the preset threshold is higher.
[0164] In another feasible implementation, a preset threshold is determined based on the building's structure. For example, when the building is a reinforced concrete structure, it can withstand a higher degree of ground deformation, and the corresponding preset threshold is higher; when the building is a regular wood structure, it can withstand a lower degree of ground deformation, and the corresponding preset threshold is lower.
[0165] In addition, the building's own support structure also affects the degree of surface deformation that the building can withstand. Based on the actual type and structure of the building, a corresponding preset threshold can be determined for each building within the mining subsidence area.
[0166] Optionally, the number of working faces may be determined based on the actual distribution of coal mines.
[0167] Based on this, this application does not limit the number of blocks. The more blocks there are, the smaller the surface movement and deformation data corresponding to each block, and the larger the working surface area retained after deleting blocks. The fewer blocks there are, the smaller the surface movement and deformation data corresponding to each block, and the simpler the calculation process for the surface movement and deformation data of each block.
[0168] This invention divides a pre-defined working face in coal mining into multiple blocks, calculates the surface movement and deformation data of buildings within the mining subsidence impact range of each block, and deletes blocks sequentially when the surface movement and deformation data of the working face exceeds a preset threshold for the buildings, until the sum of the surface movement and deformation data of the remaining blocks is less than or equal to the preset threshold. In other words, while protecting buildings within the mining subsidence impact range from damage due to coal mining, this invention preserves as many coal mining working faces as possible, thereby maximizing mining profits.
[0169] Figure 6 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 6As shown, the electronic device may include a processor 610, a communication interface 620, a memory 630, and a communication bus 640, wherein the processor 610, the communication interface 620, and the memory 630 communicate with each other through the communication bus 640. The processor 610 can call logical instructions in the memory 630 to execute a method for determining the mining range of coal under buildings in a coal mining subsidence area. The method includes: acquiring buildings within the subsidence influence range of the working face; dividing the working face into multiple blocks; and determining the surface movement and deformation data at the building location after mining in each block; if the sum of the surface movement and deformation data corresponding to all blocks is greater than a preset threshold, sequentially deleting the blocks until the sum of the surface movement and deformation data corresponding to the remaining blocks is less than or equal to the preset threshold.
[0170] Furthermore, the logical instructions in the aforementioned memory 630 can be implemented as software functional units and, when sold or used as independent products, 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 a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.
[0171] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the method for determining the mining range of coal under buildings in a coal mining subsidence area provided by the above methods. The method includes: obtaining buildings within the mining subsidence influence range of the working face; dividing the working face into multiple blocks; and determining the surface movement and deformation data at the building location after mining in each block; and, if the sum of the surface movement and deformation data corresponding to all blocks is greater than a preset threshold, sequentially deleting the blocks until the sum of the surface movement and deformation data corresponding to the remaining blocks is less than or equal to the preset threshold.
[0172] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon. When executed by a processor, the computer program implements a method for determining the mining range of coal under buildings in a coal mining subsidence area, as provided by the methods described above. The method includes: obtaining buildings within the subsidence influence range of a working face; dividing the working face into multiple blocks; and determining the surface movement and deformation data at the building location after mining in each block; and, if the sum of the surface movement and deformation data corresponding to all blocks is greater than a preset threshold, sequentially deleting the blocks until the sum of the surface movement and deformation data corresponding to the remaining blocks is less than or equal to the preset threshold.
[0173] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.
[0174] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.
[0175] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A method for determining the mining area of coal under buildings in a coal mining subsidence zone, characterized in that, include: Obtain the buildings within the mining subsidence influence range of the working face, divide the working face into multiple blocks, and determine the surface movement and deformation data of the buildings after coal mining in each block; If the sum of the surface movement and deformation data corresponding to all the aforementioned blocks is greater than a preset threshold, the blocks are deleted sequentially until the sum of the surface movement and deformation data corresponding to the remaining blocks is less than or equal to the preset threshold, including: The blocks are sorted and deleted sequentially according to the land movement deformation data corresponding to the blocks in descending order, until the sum of the land movement deformation data corresponding to the remaining blocks is less than or equal to the preset threshold. or, Based on the location of the blocks relative to the buildings, delete a group of blocks that are farthest from and closest to the buildings in sequence until the sum of the surface movement deformation data corresponding to the remaining blocks is less than or equal to the preset threshold.
2. The method for determining the mining area of coal under buildings in a coal mining subsidence area according to claim 1, characterized in that, The step of determining the surface movement and deformation data at the building site after each of the coal mining blocks includes: The geological and mining conditions and mining parameters of the segment are input into the surface subsidence prediction model to obtain the surface movement and deformation data output by the surface subsidence prediction model.
3. The method for determining the mining area of coal under buildings in a coal mining subsidence zone according to claim 2, characterized in that, The step of inputting the geological and mining conditions and mining parameters of the segment into the surface subsidence prediction model to obtain the surface movement and deformation data output by the surface subsidence prediction model includes: The coordinates of the working face and the building are converted into a coordinate system with the coal seam strike as the positive x-axis and the coal seam dip as the positive y-axis. The coordinates of the working face after transformation, the coordinates of the building after transformation, the geological and mining conditions of the block, and the mining parameters are input into the surface subsidence prediction model to obtain the surface movement and deformation data output by the surface subsidence prediction model.
4. The method for determining the mining area of coal under buildings in a coal mining subsidence area according to any one of claims 1-3, characterized in that, Before the step of sequentially deleting the blocks when the sum of the surface movement and deformation data corresponding to all the blocks is greater than a preset threshold, the method further includes: Determine the coal mining damage level corresponding to the protection level of the building, wherein the protection level and the coal mining damage level are pre-associated; The preset threshold is obtained based on the preset surface movement and deformation data corresponding to the coal mining damage level, and the coal mining damage level is pre-associated with the preset surface movement and deformation data.
5. The method for determining the mining area of coal under buildings in a coal mining subsidence zone according to any one of claims 1-3, characterized in that, Prior to the step of obtaining the buildings within the mining subsidence influence range of the working face, the method further includes: Determine the rectangle based on the maximum and minimum values on each coordinate axis of the corner points of all working surfaces; Based on the rectangular frame, determine the mining subsidence impact range of all working faces.
6. A device for determining the mining range of coal under buildings in a coal mining subsidence area, characterized in that, include: The determination module is used to acquire buildings within the mining subsidence influence range of the working face, divide the working face into multiple blocks, and determine the surface movement and deformation data of the buildings after coal mining in each block; The selection module is used to sequentially delete the blocks when the sum of the surface movement deformation data corresponding to all the blocks is greater than a preset threshold, until the sum of the surface movement deformation data corresponding to the remaining blocks is less than or equal to the preset threshold, including: The blocks are sorted and deleted sequentially according to the land movement deformation data corresponding to the blocks in descending order, until the sum of the land movement deformation data corresponding to the remaining blocks is less than or equal to the preset threshold. or, Based on the location of the blocks relative to the buildings, delete a group of blocks that are farthest from and closest to the buildings in sequence until the sum of the surface movement deformation data corresponding to the remaining blocks is less than or equal to the preset threshold.
7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the method for determining the mining range of coal under buildings in a coal mining subsidence area as described in any one of claims 1 to 5.
8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method for determining the mining range of coal under buildings in a coal mining subsidence area as described in any one of claims 1 to 5.
9. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the method for determining the mining range of coal under buildings in a coal mining subsidence area as described in any one of claims 1 to 5.