Ecological environment damage assessment method for coal mining subsidence area, storage medium and electronic equipment

Abstract

The invention discloses a coal mining subsidence area ecological environment damage assessment method, a storage medium and electronic equipment, and the method can accurately assess the damage condition of a mining area ecological environment through calculating the corresponding damage values of multiple assessment indexes of surface vegetation, surface subsidence, surface crack and surface water before mining and after surface subsidence. And comprehensive quantitative evaluation is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mining, in particular to a coal mining subsidence area ecological environment damage assessment method, a storage medium and an electronic device. BACKGROUND

[0002] The coal mining subsidence area refers to the area where the ground surface rock and soil layer moves and deforms due to underground coal resource mining by underground mining method, and the ground production, life and ecological environment are affected. Specifically, when the mining area reaches a certain range, the movement and deformation of the rock layer will affect the ground surface, causing the movement, deformation and subsidence of the ground surface, forming a subsidence area much larger than the underground goaf.

[0003] The main reason for the coal mining subsidence area is that the original mechanical balance state in the rock mass around the mining area is destroyed after the underground coal resource is mined, causing the movement, deformation and damage of the rock layer. When the mining area reaches a certain range, the movement and damage will affect the ground surface, and the houses, railways, rivers and shafts located in the mining influence range will be deformed or damaged. Long-term large-area coal mining subsidence will cause serious damage to the land and vegetation, accumulate coal gangue mountains, cause spontaneous combustion, produce toxic odor, form low-lying water or garbage dump, exist geological disaster hidden danger, and affect the living safety and ecological environment.

[0004] Therefore, it is particularly important to evaluate the ecological environment damage of the coal mining subsidence area, and there is no comprehensive quantitative evaluation of the ecological environment damage of the coal mining subsidence area in the prior art. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art, and provides a coal mining subsidence area ecological environment damage assessment method, a storage medium and an electronic device, which can accurately evaluate the ecological environment damage of the mining area and realize comprehensive quantitative evaluation.

[0006] The technical scheme of the present application provides a coal mining subsidence area ecological environment damage assessment method, comprising:

[0007] Obtaining goaf information and ground surface vegetation growth information of the goaf, wherein the goaf information includes coal seam inclination of the mining working face, coal seam buried depth, working face mining width, working face advancing distance from open-off cut to stop line, strike full mining angle, strike boundary angle, down-dip full mining angle, up-dip full mining angle, down-dip boundary angle, up-dip boundary angle, coal seam thickness in vertical direction, working face area before mining and underground water level before mining;

[0008] Determining a ground surface subsidence prediction area according to the goaf information;

[0009] Laying out a strike observation line and a dip observation line, monitoring surface subsidence, and obtaining a maximum surface subsidence value, a surface subsidence area, and a post-mining underground water level, the strike observation line and the dip observation line being composed of a plurality of surface movement observation stations;

[0010] Obtaining a pre-mining vegetation normal growth area of the goaf and a post-mining vegetation normal growth area of the surface subsidence prediction area;

[0011] Calculating a surface vegetation damage value according to the pre-mining vegetation normal growth area and the post-mining vegetation normal growth area;

[0012] Calculating a surface subsidence damage value according to the maximum surface subsidence value and the coal seam thickness;

[0013] Calculating a surface crack damage value according to the pre-mining working face area and the surface subsidence area;

[0014] Calculating an underground water damage value according to the surface vegetation growth information, the pre-mining underground water level, and the post-mining underground water level;

[0015] Evaluating a coal mining subsidence area ecological environment damage according to the surface vegetation damage value, the surface subsidence damage value, the surface crack damage value, and the underground water damage value.

[0016] In one of the optional technical solutions, the surface subsidence prediction area is determined according to the goaf information, which comprises:

[0017] The strike width and the dip width of the surface subsidence prediction area are determined according to the goaf information;

[0018] The maximum surface subsidence value, the surface subsidence area, and the post-mining underground water level are obtained, which comprises:

[0019] The product of the strike width and the dip width is calculated to obtain the surface subsidence area.

[0020] In one of the optional technical solutions, the pre-mining vegetation normal growth area of the goaf and the post-mining vegetation normal growth area of the surface subsidence prediction area are obtained, which comprises:

[0021] Pre-mining surface reflectance image information and post-mining surface reflectance image information with an area of the surface subsidence area are obtained, and the goaf and the surface subsidence area are respectively divided into a plurality of square areas along a mining advancing direction;

[0022] The pre-mining vegetation pixel area and the post-mining vegetation pixel area of each square area are calculated according to the pre-mining surface reflectance image information and the post-mining surface reflectance image information;

[0023] respectively, to obtain the pre-harvest vegetation normal growth area and the post-harvest vegetation normal growth area.

[0024] In one of the optional technical solutions, the surface vegetation damage value is calculated according to the pre-harvest vegetation normal growth area and the post-harvest vegetation normal growth area, including:

[0025] The quotient of the pre-harvest vegetation normal growth area and the pre-harvest working face area is calculated to obtain a pre-harvest vegetation proportion;

[0026] The quotient of the post-harvest vegetation normal growth area and the surface subsidence area is calculated to obtain a post-harvest vegetation proportion;

[0027] The difference between the pre-harvest vegetation proportion and the post-harvest vegetation proportion is calculated to obtain a proportion difference value;

[0028] The quotient of the proportion difference value and the pre-harvest vegetation proportion is calculated to obtain the surface vegetation damage value.

[0029] In one of the optional technical solutions, the pre-harvest surface reflectivity image information and the post-harvest surface reflectivity image information are both surface reflectivity image information of a 660nm-690nm wave band.

[0030] In one of the optional technical solutions, the surface subsidence damage value is calculated according to the maximum surface subsidence value and the coal seam thickness, including:

[0031] The quotient of the maximum surface subsidence value and the coal seam thickness is calculated to obtain the surface subsidence damage value.

[0032] In one of the optional technical solutions, the surface crack damage value is calculated according to the pre-harvest working face area and the surface subsidence area, including:

[0033] The area difference between the surface subsidence area and the pre-harvest working face area is calculated;

[0034] The quotient of the area difference and the pre-harvest working face area is calculated to obtain the surface crack damage value.

[0035] In one of the optional technical solutions, the surface vegetation growth information includes the root length and the capillary rise height of the surface vegetation, and the underground water damage value is calculated according to the surface vegetation growth information, the pre-harvest underground water level and the post-harvest underground water level, including:

[0036] The sum of the root length and the capillary rise height is calculated to obtain an underground water level threshold value.

[0037] Calculate the first water level difference between the pre-mining groundwater level and the post-mining groundwater level, and the second water level difference between the post-mining groundwater level and the groundwater level threshold.

[0038] The groundwater damage value is obtained by calculating the quotient of the first water level difference and the second water level difference.

[0039] The present invention also provides a computer-readable storage medium that stores computer instructions, which, when executed by a computer, are used to perform all the steps of the aforementioned method for assessing ecological and environmental damage in coal mining subsidence areas.

[0040] The present invention also provides an electronic device, comprising:

[0041] At least one processor; and,

[0042] A memory communicatively connected to the at least one processor; wherein,

[0043] The memory stores instructions that can be executed by the at least one processor, which enables the at least one processor to perform the aforementioned method for assessing ecological and environmental damage in coal mining subsidence areas.

[0044] The above technical solution has the following beneficial effects: by calculating the damage values ​​of multiple assessment indicators such as surface vegetation, surface subsidence, surface cracks and surface water before and after mining, the damage to the ecological environment of the mining area can be accurately assessed, and a comprehensive quantitative evaluation can be achieved. Attached Figure Description

[0045] The disclosure of this invention will become more readily understood by referring to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings:

[0046] Figure 1 A flowchart illustrating a method for assessing ecological and environmental damage in coal mining subsidence areas, provided as an embodiment of the present invention;

[0047] Figure 2 A schematic diagram of groundwater level changes in a mined-out area;

[0048] Figure 3 A schematic diagram of the predicted surface subsidence area after mining in the goaf.

[0049] Figure 4 This is a map showing the observation of surface subsidence.

[0050] Figure 5This is a schematic diagram of the hardware structure of an electronic device for assessing ecological damage in coal mining subsidence areas, provided in an embodiment of the present invention.

[0051] Appendix Label Reference Table:

[0052] 1-Vegetation; 2-Root system; 3-Pre-mining groundwater level; 4-Soil; 5-Post-mining groundwater level; 6-Groundwater level threshold; 7-Root length; 8-Capillary rise height; 9-Ground goaf; 10-Surface subsidence boundary; 11-Coal seam; 12-Dip control point; 13-Strike control point; 14-Opening cut; 15-Stop mining line; 16-Strike observation line; 17-Dip observation line; 18-Measuring point. Detailed Implementation

[0053] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0054] It is readily understood that, based on the technical solution of this invention, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of the invention.

[0055] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0056] like Figure 1 As shown, an embodiment of the present invention provides a method for assessing ecological and environmental damage in coal mining subsidence areas, comprising:

[0057] Step S101: Obtain information on the goaf area and surface vegetation growth in the goaf area;

[0058] Step S102: Determine the predicted area of ​​surface subsidence based on the information of the goaf area;

[0059] Step S103: Deploy strike observation lines and dip observation lines to monitor surface subsidence and obtain the maximum surface subsidence value, the area of ​​the surface subsidence area, and the post-mining groundwater level;

[0060] Step S104: Obtain the area of ​​normal vegetation growth zone before mining in the goaf and the area of ​​normal vegetation growth zone after mining in the predicted surface subsidence area.

[0061] Step S105: Calculate the surface vegetation damage value based on the area of ​​the normal vegetation growth zone before harvesting and the area of ​​the normal vegetation growth zone after harvesting.

[0062] Step S106: Calculate the surface subsidence damage value based on the maximum surface subsidence value and the coal seam thickness;

[0063] Step S107: Calculate the surface crack damage value based on the area of ​​the pre-mining working face and the area of ​​the surface subsidence area;

[0064] Step S108: Calculate the groundwater damage value based on surface vegetation growth information, pre-mining groundwater level, and post-mining groundwater level;

[0065] Step S109: Assess the ecological environment damage in the coal mining subsidence area based on the damage values ​​of surface vegetation, surface subsidence, surface cracks, and groundwater.

[0066] Specifically, when an ecological damage assessment of a mined-out area is required, the controller executes step S101 to obtain information about the mined-out area and surface vegetation growth, such as... Figure 2 As shown, the surface vegetation growth information includes the dominant vegetation in the mining area (1), root system (2), root length (7), and capillary rise height (8), such as... Figure 3 As shown, the goaf information includes the coal seam dip angle α, coal seam burial depth H, working face width l, the advance distance d from the opening cut 14 to the stop line 15, and the strike fully mined angle. Boundary angle δ0, downhill fully exploited angle Fully utilize the angle of the mountain Downhill boundary angle β0, uphill boundary angle γ0, coal seam thickness M in the vertical direction, pre-mining working face area, and pre-mining groundwater level.

[0067] Next, step S102 is executed, using existing geometric function relationships to determine the predicted area of ​​surface subsidence based on the information of the goaf.

[0068] Then proceed to step S103 as follows: Figure 4 As shown, strike observation line 16 and dip observation line 17 are set up. Strike observation line 16 and dip observation line 18 are composed of multiple surface mobile observation stations, and strike control point 13, dip control point 12 and measuring point 18 are set up to monitor surface subsidence. After the surface subsidence stabilizes, the maximum surface subsidence value, the area of ​​the surface subsidence area and the post-mining groundwater level are obtained.

[0069] Then, step S104 is executed to use camera technology to obtain the area of ​​normal vegetation growth zone before mining in the goaf and the area of ​​normal vegetation growth zone after mining in the predicted surface subsidence area.

[0070] Then, steps S105-S109 are executed to calculate the surface vegetation damage value, surface subsidence damage value, surface crack damage value, and groundwater damage value, respectively. Based on these values, the ecological environment damage to the coal mining subsidence area is assessed. For example, if the surface vegetation damage value is 0.3, the surface vegetation damage caused by mining is assessed as 30%; if the surface subsidence damage value is 1, meaning the coal seam mining height is the same as the surface subsidence height, the surface subsidence damage caused by mining is assessed as 100%; if the surface crack damage value is 0.5, the surface crack damage caused by mining is assessed as 50%; and if the groundwater damage value is 0.2, the groundwater damage caused by mining is considered to be 20%.

[0071] In this embodiment, by calculating the damage values ​​of multiple assessment indicators such as surface vegetation, surface subsidence, surface cracks, and surface water before and after mining, the damage to the ecological environment of the mining area can be accurately assessed, and a comprehensive quantitative evaluation can be achieved.

[0072] In one embodiment, to facilitate the calculation of the area of ​​the surface subsidence region, step S102 includes:

[0073] Based on the information of the mined-out area, the strike width L and dip width D of the predicted surface subsidence area are determined.

[0074] The acquisition of the maximum surface subsidence value, the area of ​​the surface subsidence zone, and the post-mining groundwater level includes:

[0075] The area of ​​the surface subsidence region is obtained by multiplying the strike width L and the dip width D.

[0076] In one embodiment, step S104 includes:

[0077] Obtain pre-mining and post-mining surface reflectance image information with an area equal to the area of ​​the surface subsidence zone, and divide the goaf and surface subsidence zone into several square areas along the mining advance direction.

[0078] The pre-harvest vegetation pixel area and post-harvest vegetation pixel area of ​​each square region are calculated based on the pre-harvest surface reflectance image information and the post-harvest surface reflectance image information.

[0079] The sum of the pre-harvest vegetation pixel areas and the sum of the post-harvest vegetation pixel areas of each region are calculated separately to obtain the area of ​​the normal growth zone of pre-harvest vegetation and the area of ​​the normal growth zone of post-harvest vegetation.

[0080] Specifically, pre-mining and post-mining surface reflectance images are acquired and synthesized into color images. Then, along the mining direction, the goaf and surface subsidence area are divided into several N*N square regions. The pre-mining vegetation pixel area and post-mining vegetation pixel area of ​​the normal vegetation growth band in each square region are calculated. The pre-mining vegetation pixel areas of the N*N square regions are summed to obtain the area of ​​the normal vegetation growth area before mining. The post-mining vegetation pixel areas of the N*N square regions are summed to obtain the area of ​​the normal vegetation growth area after mining.

[0081] In one embodiment, to improve accuracy, step S105 includes:

[0082] The ratio of the area of ​​the pre-mining vegetation normal growth zone to the area of ​​the pre-mining working face is calculated to obtain the pre-mining vegetation ratio.

[0083] The quotient of the area of ​​normal post-harvest vegetation growth zone and the area of ​​surface subsidence zone is calculated to obtain the proportion of post-harvest vegetation.

[0084] The difference between the pre-harvest vegetation ratio and the post-harvest vegetation ratio is calculated to obtain the ratio difference.

[0085] The surface vegetation damage value is obtained by calculating the quotient of the percentage difference and the pre-harvest vegetation percentage.

[0086] Specifically, the damage value of surface vegetation is calculated using the following formula:

[0087]

[0088] Wherein, D1 is the surface vegetation damage value; S1 is the area of ​​the pre-mining working face; S′1 is the area of ​​the pre-mining normal vegetation growth zone; S2 is the area of ​​the surface subsidence zone; and S′2 is the area of ​​the post-mining normal vegetation growth zone.

[0089] In one embodiment, both the pre-mining and post-mining surface reflectance image information are surface reflectance image information in the 660nm-690nm band, thereby obtaining the area of ​​the normally growing vegetation zone before and after mining more accurately.

[0090] In one embodiment, to improve accuracy, step S106 includes:

[0091] The surface subsidence damage value is obtained by calculating the quotient of the maximum surface subsidence value and the coal seam thickness.

[0092] Specifically, the surface subsidence damage value is calculated using the following formula:

[0093] D2 = W2 / M

[0094] Where D2 is the surface subsidence damage value; W2 is the maximum surface subsidence value; and M is the coal seam thickness.

[0095] In one embodiment, to improve accuracy, step S107 includes:

[0096] Calculate the area difference between the surface subsidence area and the pre-mining working face area;

[0097] The surface crack damage value is obtained by calculating the quotient of the area difference and the area of ​​the pre-mining working face.

[0098] Specifically, the surface crack damage value is calculated using the following formula:

[0099]

[0100] D3 represents the surface crack damage value.

[0101] In one embodiment, to improve accuracy, step S108 includes:

[0102] The groundwater level threshold is obtained by calculating the sum of the root length and the capillary rise height.

[0103] Calculate the first water level difference between the pre-mining groundwater level and the post-mining groundwater level, and the second water level difference between the post-mining groundwater level and the groundwater level threshold.

[0104] The groundwater damage value is obtained by calculating the quotient of the first water level difference and the second water level difference.

[0105] Specifically, the groundwater damage value is calculated using the following formula:

[0106]

[0107] Where D4 is the groundwater damage value; H2 is the post-mining groundwater level; H1 is the pre-mining groundwater level; and H0 is the groundwater level threshold.

[0108] If the groundwater level 5 after mining is lower than the groundwater level threshold 6, then the groundwater damage caused by mining is considered to be 100%.

[0109] One embodiment of the present invention provides a computer-readable storage medium for storing computer instructions, which, when executed by a computer, are used to perform all steps of the method for assessing ecological and environmental damage in coal mining subsidence areas as described in any of the above-mentioned method embodiments.

[0110] like Figure 5 As shown, a schematic diagram of the hardware structure of an electronic device for assessing ecological and environmental damage in coal mining subsidence areas, according to an embodiment of the present invention, includes:

[0111] At least one processor 501; and,

[0112] Memory 502 is communicatively connected to at least one processor 501; wherein,

[0113] The memory 502 stores instructions that can be executed by at least one processor 501, which enables the at least one processor 501 to perform the method for assessing ecological damage in coal mining subsidence areas as described in any of the above-described method embodiments.

[0114] Figure 5 Take a processor 501 as an example.

[0115] The preferred electronic device is a controller for assessing ecological and environmental damage in coal mining subsidence areas.

[0116] The electronic device may also include an input device 503 and an output device 504.

[0117] The processor 501, memory 502, input device 503 and output device 504 can be connected by a bus or other means. The figure shows an example of connection by bus.

[0118] The memory 502, as a non-volatile computer-readable storage medium, can be used to obtain non-volatile software programs, non-volatile computer-executable programs, and modules, such as the program instructions / modules corresponding to the method for assessing ecological environment damage in coal mining subsidence areas in the embodiments of this application, for example, Figure 1 The method flow is shown. The processor 501 executes various functional applications and data processing by running non-volatile software programs, instructions, and modules acquired in the memory 502, thereby realizing the method for assessing ecological and environmental damage in coal mining subsidence areas in the above embodiments.

[0119] The memory 502 may include a program acquisition area and a data acquisition area. The program acquisition area may acquire the operating system and applications required for at least one function; the data acquisition area may acquire data created based on the use of the method for assessing ecological and environmental damage in coal mining subsidence areas. Furthermore, the memory 502 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 502 may optionally include memory remotely located relative to the processor 501, and these remote memories may be connected via a network to the apparatus performing the method for assessing ecological and environmental damage in coal mining subsidence areas. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0120] The input device 503 can receive user clicks and generate signal inputs related to user settings and function control of the method for assessing ecological and environmental damage in coal mining subsidence areas. The output device 504 may include display devices such as a display screen.

[0121] When the one or more modules are accessed in the memory 502 and run by the one or more processors 501, the method for assessing the ecological environment damage in the coal mining subsidence area described in any of the above method embodiments is executed.

[0122] The above-described product can perform the methods provided in the embodiments of this application, and has the corresponding functional modules and beneficial effects for performing the methods. Technical details not described in detail in this embodiment can be found in the methods provided in the embodiments of this application.

[0123] The above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and are not intended to limit them. Although the embodiments of the present invention have 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. Such 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 assessing ecological and environmental damage in coal mining subsidence areas, characterized in that, include: Obtain goaf information and surface vegetation growth information. The goaf information includes the coal seam dip angle, coal seam depth, working face width, advance distance of the working face from the opening cut to the stop line, strike fully mined angle, strike boundary angle, downhill fully mined angle, uphill fully mined angle, downhill boundary angle, uphill boundary angle, coal seam thickness in the vertical direction, pre-mining working face area, and pre-mining groundwater level. Based on the information about the mined-out area, the predicted area of ​​surface subsidence is determined; Strike and dip observation lines are set up to monitor surface subsidence and obtain the maximum surface subsidence value, the area of ​​the surface subsidence area and the post-mining groundwater level. The strike and dip observation lines are composed of multiple mobile surface observation stations. Obtain the area of ​​normal vegetation growth zone before mining in the goaf and the area of ​​normal vegetation growth zone after mining in the predicted surface subsidence area. The surface vegetation damage value is calculated based on the area of ​​the normal vegetation growth zone before harvest and the area of ​​the normal vegetation growth zone after harvest. The surface subsidence damage value is calculated based on the maximum surface subsidence value and the coal seam thickness. The surface crack damage value is calculated based on the area of ​​the pre-mining working face and the area of ​​the surface subsidence area. The groundwater damage value is calculated based on the surface vegetation growth information, the pre-mining groundwater level, and the post-mining groundwater level. The ecological environment damage in the coal mining subsidence area was assessed based on the surface vegetation damage value, the surface subsidence damage value, the surface crack damage value, and the groundwater damage value.

2. The method for assessing ecological and environmental damage in coal mining subsidence areas as described in claim 1, characterized in that, The step of determining the predicted surface subsidence area based on the goaf information includes: Based on the information about the mined-out area, the strike width and dip width of the predicted surface subsidence area are determined. The acquisition of the maximum surface subsidence value, the area of ​​the surface subsidence zone, and the post-mining groundwater level includes: The area of ​​the surface subsidence region is obtained by calculating the product of the strike width and the dip width.

3. The method for assessing ecological and environmental damage in coal mining subsidence areas as described in claim 2, characterized in that, The process of obtaining the area of ​​the pre-mining normal vegetation growth zone in the goaf and the area of ​​the post-mining normal vegetation growth zone in the predicted surface subsidence area includes: Obtain pre-mining surface reflectance image information and post-mining surface reflectance image information with an area equal to the area of ​​the surface subsidence area, and divide the goaf and the surface subsidence area into several square areas along the mining advance direction; The pre-harvest vegetation pixel area and post-harvest vegetation pixel area of ​​each square region are calculated based on the pre-harvest surface reflectance image information and the post-harvest surface reflectance image information. The sum of the pre-harvest vegetation pixel areas and the sum of the post-harvest vegetation pixel areas of each region are calculated to obtain the area of ​​the pre-harvest vegetation normal growth zone and the area of ​​the post-harvest vegetation normal growth zone.

4. The method for assessing ecological and environmental damage in coal mining subsidence areas as described in any one of claims 1-3, characterized in that, The calculation of surface vegetation damage values ​​based on the area of ​​the normally growing vegetation zone before harvesting and the area of ​​the normally growing vegetation zone after harvesting includes: The ratio of the area of ​​the pre-harvest vegetation normal growth zone to the area of ​​the pre-harvest working face is calculated to obtain the pre-harvest vegetation ratio. The quotient of the area of ​​the normal post-harvest vegetation growth zone and the area of ​​the surface subsidence zone is calculated to obtain the post-harvest vegetation ratio. The difference between the pre-harvest vegetation ratio and the post-harvest vegetation ratio is calculated to obtain the ratio difference. The surface vegetation damage value is obtained by calculating the quotient of the percentage difference and the pre-harvest vegetation percentage.

5. The method for assessing ecological and environmental damage in coal mining subsidence areas as described in claim 4, characterized in that, Both the pre-mining and post-mining surface reflectance image information are surface reflectance image information in the 660nm-690nm band.

6. The method for assessing ecological and environmental damage in coal mining subsidence areas as described in claim 1, characterized in that, The calculation of the surface subsidence damage value based on the maximum surface subsidence value and the coal seam thickness includes: The surface subsidence damage value is obtained by calculating the quotient of the maximum surface subsidence value and the coal seam thickness.

7. The method for assessing ecological and environmental damage in coal mining subsidence areas as described in claim 1, characterized in that, The calculation of surface crack damage values ​​based on the pre-mining working face area and the surface subsidence area includes: Calculate the area difference between the area of ​​the surface subsidence zone and the area of ​​the pre-mining working face; The surface crack damage value is obtained by calculating the quotient of the area difference and the area of ​​the pre-mining working face.

8. The method for assessing ecological and environmental damage in coal mining subsidence areas as described in claim 1, characterized in that, The surface vegetation growth information includes the root length and capillary rise height of the surface vegetation. The calculation of groundwater damage values ​​based on the surface vegetation growth information, the pre-mining groundwater level, and the post-mining groundwater level includes: The groundwater level threshold is obtained by calculating the sum of the root length and the capillary rise height. Calculate the first water level difference between the pre-mining groundwater level and the post-mining groundwater level, and the second water level difference between the post-mining groundwater level and the groundwater level threshold. The groundwater damage value is obtained by calculating the quotient of the first water level difference and the second water level difference.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions, which, when executed by a computer, are used to perform all the steps of the method for assessing ecological and environmental damage in coal mining subsidence areas as described in any one of claims 1-8.

10. An electronic device, characterized in that, include: At least one processor; as well as, A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, which, when executed by the at least one processor, enables the at least one processor to perform the method for assessing ecological and environmental damage in coal mining subsidence areas as described in any one of claims 1-8.

Images