Mine grouting water conservation aquifuge reconstruction method and related equipment

Abstract

The application provides a mine area grouting water conservation aquiclude reconstruction method and related equipment, the mine area grouting water conservation aquiclude reconstruction method includes;In the mine area, the geophysical prospecting is carried out from the aquifer to the goaf in the coal mining management area, the first apparent resistivity of each position in space is obtained, the position of the first apparent resistivity less than or equal to the first preset resistivity is selected to form the first dominant water channel area;Water flow direction test is carried out in at least two monitoring wells in the coal mining management area, the first flow direction fitting function of each monitoring well is obtained, the first flow direction intersection point of the two monitoring wells is calculated by selecting two first flow direction fitting functions;When the first flow direction intersection point is located within the first dominant water channel area, then the first dominant water channel area is grouted.The mine area grouting water conservation aquiclude reconstruction method and related equipment provided by the application are simple and convenient, can quickly and accurately realize grouting water conservation, low in cost, and effectively reduce the loss of surface water resources.

Description

Technical Field

[0001] The present application relates to the field of grouting repair technology, and in particular to a method for reconstructing a water-retaining and aquiclude layer by grouting in a mining area and related equipment. Background Art

[0002] Coal is an important natural resource. When the coal mining method is long-arm retreat-type comprehensive mechanized mining, the full height is mined at one time, and the roof is managed by the full collapse method, if the thickness of the impermeable soil layer under the bedrock and loose layer is insufficient, the water-conducting fracture zone will directly conduct air-porous bedrock and even loose layer in local sections, resulting in a series of problems such as the water level of the Quaternary shallow loose layer gradually decreasing with the progress of coal mining, the disappearance of surface runoff, and the deterioration of regional ecology.

[0003] To achieve water-conserving coal mining, grouting is required to recreate an aquiclude beneath the Quaternary loose layer. However, conventional treatment methods involve grouting in areas with missing or weak soil layers. This involves large grouting volumes and drilling, which can impact groundwater quality and the environment. Furthermore, it consumes significant manpower and material resources, resulting in high costs. Therefore, a more efficient grouting method for water conservation in mining areas is urgently needed. Summary of the Invention

[0004] In view of this, the purpose of this application is to propose a method for reconstructing a water-retaining and aquiclude layer in a mining area by grouting to solve the above technical problems.

[0005] The present application provides a method for reconstructing a water-retaining and impermeable layer by grouting in a mining area, comprising: conducting geophysical exploration from the aquifer to the goaf in a coal mining and management area of ​​the mining area to obtain a first apparent resistivity at each position in the space, and selecting positions in the space where the first apparent resistivity is less than or equal to a first preset resistivity to form a first dominant water channel area; conducting water flow direction tests in at least two monitoring wells in the coal mining and management area to obtain a first flow direction fitting function for each of the monitoring wells, and selecting two of the first flow direction fitting functions to calculate a first flow direction intersection point corresponding to the two monitoring wells; and when the first flow direction intersection point is within the first dominant water channel area, performing a grouting operation on the first dominant water channel area.

[0006] Furthermore, the mining area grouting water-retaining and aquiclude reconstruction method also includes: when the first flow direction intersection is located outside the first dominant water channel area, the first preset resistivity is increased to reconstruct the first dominant water channel area, or, geophysical exploration is re-conducted from the surface to the goaf in the coal mining and management area to obtain the first apparent resistivity of each position in the space.

[0007] Furthermore, the geophysical exploration from the surface to the goaf in the coal mining management area includes: obtaining geological parameters of the coal mining management area, and determining the water source of the water filling according to the geological parameters; when the water source of the water filling comes from the Quaternary aquifer, geophysical exploration is carried out from the surface to the goaf in the coal mining management area.

[0008] Furthermore, the mining area grouting water-retaining and aquiclude reconstruction method also includes: after the grouting operation, geophysical exploration is conducted again on the coal mining and management area from the aquifer to the goaf to obtain the second apparent resistivity of each position in the space, and positions in the space where the second apparent resistivity is less than or equal to the first preset resistivity are selected to form a second dominant water channel area; when the second dominant water channel area is located within the first dominant water channel area, grouting is stopped.

[0009] Furthermore, the method of obtaining the first apparent resistivity of each position in the space then includes: selecting positions in the aquifer where the first apparent resistivity is less than or equal to the first preset resistivity to form a first region, and the area of ​​the first region is a first area; the method of reconstructing the mining area grouting water-retaining and aquiclude layer also includes: after performing the grouting operation, conducting geophysical exploration again on the coal mining and management area from the aquifer to the goaf to obtain the second apparent resistivity of each position in the space, selecting positions in the aquifer where the second apparent resistivity is less than or equal to the first preset resistivity to form a second region, and the area of ​​the second region is a second area; when the second area is larger than the first area, grouting is stopped.

[0010] Furthermore, the mining area grouting water-retaining and aquiclude reconstruction method also includes: after performing the grouting operation, conducting water flow direction tests on at least two monitoring wells in the coal mining and management area again to obtain a second flow direction fitting function for each monitoring well, selecting two of the second flow direction fitting functions to calculate the second flow direction intersection points corresponding to the two monitoring wells; when the second flow direction intersection point is outside the first dominant water channel area, stopping grouting.

[0011] Furthermore, the mining area grouting water-retaining and aquiclude reconstruction method also includes: when the second area is larger than the first area, the volume of the second dominant water channel area is less than or equal to the volume of the first dominant water channel area of ​​a first preset proportion, and the second flow direction intersection is located outside the first dominant water channel area, grouting is stopped.

[0012] Furthermore, the mining area grouting water-retaining and aquiclude reconstruction method also includes: after a preset time has passed since the grouting is completed, a water level test is conducted in the monitoring wells within the coal mining and management area to obtain a first water level drop, and a water level test is conducted in the monitoring wells outside the coal mining and management area to obtain a second water level drop; when the first water level drop is less than or equal to a second preset proportion of the second water level drop, water conservation is completed.

[0013] According to a second aspect of the present application, a device for reconstructing a water-retaining and water-proof layer for grouting in a mining area is provided, comprising: a geophysical exploration module, configured to perform geophysical exploration from the aquifer to the goaf in the coal mining and management area of ​​the mining area, obtain a first apparent resistivity at each position in the space, and select positions in the space where the first apparent resistivity is less than or equal to a first preset resistivity to form a first dominant water channel area; a well logging module, configured to perform water flow direction tests on at least two monitoring wells in the coal mining and management area, obtain a first flow direction fitting function for each of the monitoring wells, and select two of the first flow direction fitting functions to calculate a first flow direction intersection point corresponding to the two monitoring wells; and a grouting module, configured to perform grouting operations on the first dominant water channel area when the first flow direction intersection point is located within the first dominant water channel area.

[0014] The third aspect of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method for reconstructing the water-retaining and aquiclude layer in a mining area by grouting is implemented as described in the first aspect above.

[0015] The fourth aspect of the present application provides a non-transitory computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable the computer to execute the method for reconstructing the mining area grouting water-retaining and aquiclude layer as described in the first aspect above.

[0016] The fifth aspect of the present application provides a computer program product, including computer program instructions, characterized in that when the computer program instructions are run on a computer, the computer executes the method for reconstructing the mining area grouting water-retaining and aquiclude layer as described in the first aspect above.

[0017] It can be seen from the above that the application provides a mine area grouting water conservation aquiclude reconstruction method and related equipment. The mine area grouting water conservation aquiclude reconstruction method comprises the following steps: geophysical prospecting from an aquifer to a goaf in a coal mining treatment area of a mine area to obtain a first apparent resistivity of each position in space, and selecting positions with a first apparent resistivity less than or equal to a first preset resistivity to form a first dominant water channel area; water flow direction testing is performed on at least two monitoring wells in the coal mining treatment area to obtain a first flow direction fitting function of each monitoring well, and a first flow direction intersection point of the two monitoring wells is calculated by selecting the two first flow direction fitting functions; when the first flow direction intersection point is located within the first dominant water channel area, grouting operation is performed on the first dominant water channel area. The first dominant water channel area is preliminarily obtained through geophysical prospecting, and then the first flow direction intersection point is obtained by using flow direction testing to check the first dominant water channel area. When the first flow direction intersection point is located within the first dominant water channel area, it represents that the first dominant water channel area is relatively accurate, and only the first dominant water channel area is subjected to grouting operation to reconstruct the aquiclude, so that the water conservation effect of the coal mining treatment area can be achieved. The method avoids blind construction of the traditional method, reduces unnecessary drilling and construction, reduces the overall treatment cost, and reduces the impact on the environment to a certain extent. The mine area grouting water conservation aquiclude reconstruction method and related equipment are simple and convenient, can quickly and accurately achieve grouting water conservation, have low cost, and effectively reduce the loss of surface water resources. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the application or related art, the following will briefly introduce the drawings needed to be used in the embodiments or related art descriptions. Obviously, the drawings in the following description are only embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a flowchart of the mine area grouting water conservation aquiclude reconstruction method in the embodiments of the application.

[0020] Figure 2 It is a radar chart of flow direction testing.

[0021] Figure 3 It is a structure diagram of the mine area grouting water conservation aquiclude reconstruction device in the embodiments of the application.

[0022] Figure 4 It is a structure diagram of the electronic device in the embodiments of the application. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the application more clear, the following will further describe the application in combination with specific embodiments and with reference to the drawings.

[0024] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in the embodiments of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] Coal is an important natural resource. When the coal mining method is long-arm retreat-style comprehensive mechanized mining, full-height mining at one time, and full-caving roof management, if the thickness of the impermeable soil layer under the bedrock and loose layer is insufficient, the water-conducting fracture zone will directly conduct the air-porous bedrock and even the loose layer in local sections, resulting in a series of problems such as the water level of the shallow loose layer of the Quaternary gradually decreasing as the coal mining progresses, the disappearance of surface runoff, and the deterioration of the regional ecology. In order to achieve water-conserving coal mining, it is necessary to grout the impermeable layer under the Quaternary loose layer. However, the conventional treatment method is to grout the missing soil layer and weak areas in the mining area. The large amount of grouting and drilling work can easily affect the groundwater quality and environment. On the one hand, it also consumes a lot of manpower and material resources and is costly. Therefore, a more efficient grouting method for water conservation in mining areas is urgently needed.

[0026] Based on the above situation, a horizontal aquiclude can be constructed by grouting the dominant water channels within the weathered bedrock, thereby cutting off the supply of Quaternary water to the mine water and conserving the Quaternary aquifer. The conventional approach is to reconstruct the aquiclude by grouting the entire area, but this method undoubtedly increases costs and, due to the complex geological stresses, makes construction across the entire area more difficult. Therefore, precisely selecting the areas with the dominant water channels for aquiclude reconstruction is a pressing issue.

[0027] Below, through specific embodiments and combined Figures 1 to 4 To describe the technical solution of this application in detail.

[0028] Some embodiments of the present application provide a method for reconstructing a water-retaining and aquicluded layer in a mining area by grouting, such as Figure 1 As shown, the following steps are included:

[0029] S1. Conduct geophysical exploration from the aquifer to the goaf in the coal mining and management area of ​​the mining area to obtain a first apparent resistivity at each position in the space, and select positions in the space where the first apparent resistivity is less than or equal to a first preset resistivity to form a first advantageous water channel area.

[0030] The coal mining treatment area of ​​a mining area refers to the area with missing and weak soil layers in the mining area, which can be obtained based on the geological parameters before and after mining.

[0031] Geophysical exploration, abbreviated as geophysical prospecting, refers to the detection of geological conditions such as stratum lithology and geological structure by studying and observing changes in various geophysical fields. In this embodiment, geophysical prospecting uses transient electromagnetic method (TEM), for example, as an effective means of detecting underground low-resistance bodies (such as aquifers and water-rich areas), operating on the principle of electromagnetic induction. Specifically, it emits horizontal transient electromagnetic fields and observes the propagation and attenuation characteristics of these fields in the underground medium to infer the electrical characteristics of the underground medium, thereby analyzing the distribution of groundwater and its water-richness. Transient electromagnetic algorithms can accurately capture core information such as the distribution of underground aquifers related to water-filled sources, the relative differences in water-richness, and the spatial morphology of abnormal areas. This is due to the significant difference in electrical properties between water-rich areas and surrounding strata, namely their lower resistivity. Through transient electromagnetic measurements, the first apparent resistivity of the underground medium can be obtained. This data can be used to draw apparent resistivity profiles or slices, intuitively revealing the distribution characteristics of water-rich areas; the lower the first apparent resistivity, the better the flow effect and the less obstruction.

[0032] The first preset resistivity is, for example, 20Ω·m to 40Ω·m, and is not specifically limited. The space from the aquifer to the goaf in the coal mining management area can be expressed as A=cf(x, y, z), where c is defined as the selection coefficient. For positions where the first apparent resistivity is less than or equal to the first preset resistivity, c is 1; for positions where the first apparent resistivity is greater than the first preset resistivity, c is 0; then the set A1 where c is 1 is the first advantageous water-conducting channel area, representing a position where water is easier to flow. This position easily guides the water from the aquifer to the goaf, so it is necessary to focus on grouting and sealing this area to achieve water conservation.

[0033] S2. Conduct water flow direction tests in at least two monitoring wells in the coal mining and management area to obtain a first flow direction fitting function for each of the monitoring wells, and select two of the first flow direction fitting functions to calculate the first flow direction intersection points corresponding to the two monitoring wells.

[0034] Although the testing range of geophysical exploration is wide and the cost is low, the accuracy is relatively low. On this basis, water flow direction testing can be carried out to further verify whether the aforementioned first advantage water channel area is accurate. The flow velocity and direction logging technology has high accuracy, but the cost is relatively high, so it is not suitable for high-density applications.

[0035] Use the flow velocity and direction logging device to combine the hydrological holes and supplementary exploration holes drilled in the construction area and surrounding areas at the beginning of the construction as monitoring wells to test the flow direction. When measuring the flow direction in a monitoring well, the measurement time for each point should be no less than 15 minutes. After the flow velocity and direction are stable, obtain the radar map of a certain layer, such as Figure 2 As shown in FIG, the first flow direction fitting function y=ax+m of the water flow direction in the monitoring well can be obtained by a conventional function fitting algorithm, where x and y represent the horizontal positions of the dominant water-conducting channel, a is the slope of the function fitted according to the radar map, and m is the intercept of the function fitted according to the radar map. The flow direction of another monitoring well is measured, and a radar map of the same layer is obtained. The first flow direction fitting function y=bx+n is obtained by fitting the function using the same coordinate system. Similarly, b is the slope of the function fitted according to the radar map, and n is the intercept of the function fitted according to the radar map. The two functions are solved to obtain (x1, y1). Then, considering the test layer, that is, the longitudinal position z1, the three-dimensional intersection point (x1, y1, z1) can be obtained, that is, the first flow direction intersection point. This point is the water flow convergence point at different positions, that is, the dominant channel area in the actual aquifer.

[0036] S3. When the first flow direction intersection is located within the first dominant water guiding channel area, grouting operation is performed on the first dominant water guiding channel area.

[0037] If (x1, y1, z1)∈A1, it can be proved that the first dominant water channel area obtained by geophysical exploration is accurate. Therefore, grouting treatment of the weathered bedrock aquifer is only carried out in the first dominant water channel area to transform it into a relatively impermeable layer, so as to minimize the impact on the environment and reduce economic costs.

[0038] When water flow direction tests are conducted on multiple monitoring wells, multiple first flow direction fitting functions will be obtained. Equation groups can be constructed in pairs to solve the corresponding first flow direction intersection points. When all the first flow direction intersection points are located within the first dominant water channel area, grouting operations are performed on the first dominant water channel area, which is more accurate but also increases the cost.

[0039] For the specific grouting operation, a detailed reconstruction plan will be formulated based on the scope of the aquiclude reconstruction and the geological conditions. This includes the selection of grouting materials, the setting of grouting pressure, the construction details of the grouting holes, etc., which will not be elaborated here.

[0040] The first advantageous water channel area is initially obtained through geophysical exploration, and then the first flow direction intersection is obtained by flow direction testing, and the first advantageous water channel area is verified. When the first flow direction intersection is within the first advantageous water channel area, it represents that the first advantageous water channel area is relatively accurate. Grouting operations are only performed on the first advantageous water channel area to reconstruct the aquiclude, so as to achieve the water conservation effect of the coal mining management area; the blind construction of traditional methods is avoided, unnecessary drilling and construction are reduced, the overall management cost is reduced, and the impact on the environment is reduced to a certain extent.

[0041] This mining area's grouting and water-retention aquiclude reconstruction method is simple and convenient, enabling rapid and accurate grouting to retain water at a low cost, effectively reducing shallow water loss. By combining geophysical prospecting with well logging technology, it is possible to quickly and accurately identify water-rich areas and conditions within the remediation area, avoiding the blind application of traditional methods. This reduces unnecessary drilling and construction, lowering overall remediation costs and minimizing environmental impact. A real-time monitoring system provides feedback, enabling dynamic adjustments to remediation measures to ensure long-term effectiveness.

[0042] In some embodiments, the mining area grouting water-retaining and aquiclude reconstruction method further includes:

[0043] S4. When the first flow direction intersection is located outside the first advantageous water channel area, the first preset resistivity is increased to reconstitute the first advantageous water channel area, or geophysical exploration is re-performed from the surface to the goaf in the coal mining and management area to obtain the first apparent resistivity of each position in the space.

[0044] like If the value is not found, it means that the first dominant water channel area obtained by geophysical exploration is not accurate, which may be caused by the low setting of the first preset resistivity or inaccurate geophysical exploration. It is necessary to increase the first preset resistivity to regain the first dominant water channel area, or to re-perform geophysical exploration to obtain a new first apparent resistivity, and then regain the first dominant water channel area; subsequently, the same flow direction determination method is used to verify whether the new first dominant water channel area is accurate.

[0045] In some embodiments, the geophysical exploration from the surface to the goaf in the coal mining and remediation area includes:

[0046] S101. Obtain geological parameters of the coal mining and treatment area, and determine a water source for water filling based on the geological parameters.

[0047] Geological parameters include, for example, the type, thickness and distribution of strata, geological structural characteristics (such as faults, folds, etc.), groundwater level depth, aquifer permeability coefficient, hydraulic connection between aquifers, and the height of water-conducting fracture zones.

[0048] The scope of the weak and missing areas of the stratum can be determined based on the stratum thickness. The stratum thickness in the weak area is less than the thickness of the conventional stable soil layer, and a threshold screening can be set according to engineering needs. The stratum thickness in the missing area is 0. The scope of the weak and missing areas of the stratum is the scope of the coal mining management area.

[0049] The source of the recharge water refers to the origin of the mine water, which mainly includes atmospheric precipitation, surface water, groundwater, and old mine water. The source of the recharge water can be determined using conventional source tracing algorithms based on the aquifer permeability coefficient, the hydraulic connection between aquifers, the height of the water-conducting fracture zone, and other factors.

[0050] For example, a coal mine in western China has coal-bearing strata belonging to the Yan'an Formation of the Middle Jurassic System. The coexistence of coal seams and aquifers is characterized by the coal seam being below and the aquifer above. The aquifers within the mine field are, from top to bottom, the Quaternary groundwater aquifer, the Jurassic weathered bedrock aquifer, and the Jurassic bedrock aquifer. The aquiclude is primarily the Neogene soil aquiclude (with some areas missing). Currently, the primary mining activity is the 3-1 coal seam of the Jurassic Yan'an Formation. The resulting water-conducting fractures have extended into the weathered bedrock aquifer. Consequently, in areas with weak or missing soil layers, weathered bedrock groundwater in the coal seam roof and Quaternary groundwater become the primary sources of water recharge.

[0051] S102. When the water source is from the Quaternary aquifer, geophysical exploration is conducted from the surface to the goaf in the coal mining and management area.

[0052] When the water source comes from the Quaternary aquifer, it means that there is water loss. Only then is it necessary to carry out the subsequent selection and grouting operations of the first dominant water channel area.

[0053] In some embodiments, the mining area grouting water-retaining and aquiclude reconstruction method further includes:

[0054] S501. After the grouting operation, geophysical exploration is conducted again on the coal mining and treatment area from the aquifer to the goaf to obtain the second apparent resistivity of each position in the space, and positions in the space where the second apparent resistivity is less than or equal to the first preset resistivity are selected to form a second dominant water channel area.

[0055] After the grouting operation, in order to verify the grouting effect, geophysical exploration can be performed again to obtain the second dominant water channel area A2 according to the same first preset resistivity, using the same method as the above-mentioned method for obtaining the first dominant water channel area.

[0056] S502: When the second advantageous water guiding channel area is located within the first advantageous water guiding channel area, stop grouting.

[0057] When the second dominant water channel area is located within the first dominant water channel area, it means that the original first dominant water channel area has become smaller, indicating that the grouting blocking effect is effective and the grouting can be stopped.

[0058] In some embodiments, obtaining the first apparent resistivity of each position in the space may then include:

[0059] S103: Select locations in the aquifer where the first apparent resistivity is less than or equal to the first preset resistivity to form a first region, where the area of ​​the first region is a first area.

[0060] In the aquifer, positions where the first apparent resistivity is less than or equal to the first preset resistivity are selected to form a first region with an area of ​​S1, so as to facilitate subsequent grouting effect inspection.

[0061] In some embodiments, the mining area grouting water-retaining and aquiclude reconstruction method further includes:

[0062] S511. After the grouting operation is performed, geophysical exploration is conducted again on the coal mining and management area from the aquifer to the goaf to obtain the second apparent resistivity of each position in the space, and positions in the aquifer where the second apparent resistivity is less than or equal to the first preset resistivity are selected to form a second region, and the area of ​​the second region is the second area.

[0063] After the grouting operation, in order to verify the grouting effect, geophysical exploration can be performed again to obtain a second area of ​​the aquifer with an area of ​​S2 according to the same first preset resistivity, using the same method as the above-mentioned method for obtaining the first area.

[0064] S512: When the second area is larger than the first area, stop grouting.

[0065] Similarly, when S2>S1, it means that the effective area of ​​the aquifer has increased, indicating that the sealing effect of grouting is effective and grouting can be stopped.

[0066] In some embodiments, the mining area grouting water-retaining and aquiclude reconstruction method further includes:

[0067] S521. After the grouting operation is performed, the water flow direction test is performed again on at least two monitoring wells in the coal mining and management area to obtain the second flow direction fitting function of each monitoring well, and two of the second flow direction fitting functions are selected to calculate the second flow direction intersection points corresponding to the two monitoring wells.

[0068] After the grouting operation, in order to verify the grouting effect, the water flow direction test can be performed again to obtain the second flow direction intersection point (x2, y2, z2) using the same method as the aforementioned method for obtaining the first flow direction intersection point (x1, y1, z1).

[0069] S522. When the second flow direction intersection is outside the first dominant water guide channel area, stop grouting.

[0070] like Or if there is no solution for the second flow intersection, it means that the original intersection no longer exists, indicating that the grouting sealing effect is effective and the grouting can be stopped.

[0071] In some embodiments, the mining area grouting water-retaining and aquiclude reconstruction method further includes:

[0072] S5. When the second area is larger than the first area, the volume of the second dominant water channel region is less than or equal to a first preset ratio of the volume of the first dominant water channel region, and the second flow direction intersection is outside the first dominant water channel region, stop grouting.

[0073] In order to ensure the effectiveness of the grouting effect, the above three methods can be combined to make a judgment, wherein the first preset ratio is, for example, 5%, which is not limited to a specific ratio. When S2>S1, A2≤5%A1, and When , it means the water retention effect is very good and no further grouting is needed.

[0074] In some embodiments, the mining area grouting water-retaining and aquiclude reconstruction method further includes:

[0075] S601. After a preset time has passed since grouting is completed, a water level test is performed in a monitoring well within the coal mining and treatment area to obtain a first water level drop, and a water level test is performed in a monitoring well outside the coal mining and treatment area to obtain a second water level drop.

[0076] After the grouting is completed, the long observation holes and supplementary exploration holes can be used as monitoring wells to test the grouting water conservation effect in the long term. The preset time is, for example, 365 days, etc., and there is no specific limit. The water level test is carried out in the monitoring wells within the coal mining and management area to obtain the first water level drop, which can be obtained by taking the difference between the water level when the grouting is completed and the water level one year later; the water level test is carried out in the monitoring wells outside the coal mining and management area to obtain the second water level drop, which can also be obtained by taking the difference between the water level when the grouting is completed and the water level one year later.

[0077] S602: When the first water level drop is less than or equal to a second preset ratio of the second water level drop, water conservation is completed.

[0078] The second preset ratio is, for example, 30%. When the first water level drop is less than or equal to 30% of the second water level drop, it means that the water level in the coal mining and treatment area drops very little, indicating that the water conservation effect is sustained and effective.

[0079] It is understandable that before using the technical solutions of each embodiment of the present disclosure, the type, scope of use, usage scenarios, etc. of the personal information involved will be informed to the user in an appropriate manner, and the user's authorization will be obtained.

[0080] For example, in response to a user's active request, a prompt message is sent to the user to clearly inform the user that the requested operation will require the acquisition and use of the user's personal information. This allows the user to independently choose whether to provide personal information to the electronic device, application, server, storage medium, or other software or hardware that performs the operation of the disclosed technical solution based on the prompt message.

[0081] As an optional but non-limiting implementation, in response to a user's active request, the prompt information may be sent to the user in the form of a pop-up window, in which the prompt information may be presented in text form. Furthermore, the pop-up window may also contain a selection control for the user to select "agree" or "disagree" to provide personal information to the electronic device.

[0082] It is understandable that the above notification and user authorization process are merely illustrative and do not constitute a limitation on the implementation of the present disclosure. Other methods that comply with relevant laws and regulations may also be applied to the implementation of the present disclosure.

[0083] In some embodiments of the present application, a device for reconstructing a water-retaining and water-insulating layer in a mining area is provided, referring to Figure 3 , including: a geophysical exploration module 31, which is configured to perform geophysical exploration from the aquifer to the goaf in the coal mining and management area of ​​the mining area, obtain the first apparent resistivity of each position in the space, and select the positions in the space where the first apparent resistivity is less than or equal to the first preset resistivity to form a first dominant water channel area; a well logging module 32, which is configured to perform water flow direction tests in at least two monitoring wells in the coal mining and management area, obtain the first flow direction fitting function of each monitoring well, and select two of the first flow direction fitting functions to calculate the first flow direction intersection point corresponding to the two monitoring wells; a grouting module 33, which is configured to perform grouting operations on the first dominant water channel area when the first flow direction intersection point is located within the first dominant water channel area.

[0084] The device of the above embodiment is used to implement the corresponding mining area grouting water-retaining and aquiclude reconstruction method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0085] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments and methods, the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and runnable on the processor. When the processor executes the program, the method for reconstructing the mining area grouting water-retaining and aquiclude layer described in any of the above embodiments is implemented.

[0086] Figure 4 10. A more specific hardware structure diagram of an electronic device provided in this embodiment is shown. The device may include: a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040 are communicatively connected to each other within the device via the bus 1050.

[0087] The processor 1010 can be implemented using a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0088] The memory 1020 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage devices, dynamic storage devices, etc. The memory 1020 can store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 1020 and is called and executed by the processor 1010.

[0089] The input / output interface 1030 is used to connect input / output modules to implement information input and output. The input / output modules can be configured as components within the device (not shown) or can be externally connected to the device to provide corresponding functions. Input devices can include a keyboard, mouse, touch screen, microphone, various sensors, etc., and output devices can include a display, speaker, vibrator, indicator light, etc.

[0090] The communication interface 1040 is used to connect to a communication module (not shown) to enable communication between the device and other devices. The communication module can communicate via wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WiFi, Bluetooth, etc.).

[0091] The bus 1050 comprises a path for transmitting information between the various components of the device (eg, the processor 1010 , the memory 1020 , the input / output interface 1030 , and the communication interface 1040 ).

[0092] It should be noted that although the above device only shows the processor 1010, the memory 1020, the input / output interface 1030, the communication interface 1040, and the bus 1050, in a specific implementation, the device may also include other components necessary for normal operation. In addition, it will be understood by those skilled in the art that the above device may only include the components necessary to implement the embodiments of this specification, and does not necessarily include all the components shown in the figure.

[0093] The electronic device of the above embodiment is used to implement the corresponding mining area grouting water-retaining and aquiclude reconstruction method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0094] Based on the same inventive concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a non-transitory computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable the computer to execute the mining area grouting water-retaining and aquiclude reconstruction method as described in any of the above embodiments.

[0095] The non-transitory computer-readable media of this embodiment include permanent and non-permanent, removable and non-removable media that can be used to store information by any method or technology. The information can be computer-readable instructions, data structures, modules of programs or other data. Examples of storage media for computers include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0096] The computer instructions stored in the storage medium of the above embodiment are used to enable the computer to execute the mining area grouting water-retaining and aquiclude reconstruction method as described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0097] Based on the same concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a computer program product, including computer program instructions. When the computer program instructions are run on a computer, the computer executes the mining area grouting water-retaining and aquiclude reconstruction method as described in any of the above embodiments, which has the beneficial effects of the corresponding method embodiments and will not be repeated here.

[0098] It should be noted that the above description is limited to some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in an order different from that described in the above embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order or sequential order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0099] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. Within the scope of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0100] In addition, for simplicity of description and discussion, and in order not to make the embodiment of the application difficult to understand, the known power supply / ground connection with other components may or may not be shown in the accompanying drawings provided. In addition, the device can be shown in the form of a block diagram to avoid making the embodiment of the application difficult to understand, and this also takes into account the following fact, that is, the details of the embodiment of these block diagram devices are highly dependent on the platform to be implemented in the embodiment of the application (that is, these details should be fully within the scope of understanding of those skilled in the art). When specific details are set forth to describe the exemplary embodiments of the application, it will be apparent to those skilled in the art that the embodiment of the application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0101] Although the present application has been described in conjunction with specific embodiments of the present application, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art based on the foregoing description. The present application embodiments are intended to encompass all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application embodiments should be included within the scope of protection of the present application.

Claims

1. A method for reconstructing a water-retaining and water-proof layer in a mining area by grouting, characterized in that: include: Conducting geophysical exploration in the coal mining and treatment area of ​​the mining area from the aquifer to the goaf to obtain a first apparent resistivity at each location in the space, and selecting locations in the space where the first apparent resistivity is less than or equal to a first preset resistivity to form a first advantageous water channel area; Conducting water flow direction tests in at least two monitoring wells in the coal mining and treatment area to obtain a first flow direction fitting function for each monitoring well, and selecting two of the first flow direction fitting functions to calculate first flow direction intersection points corresponding to the two monitoring wells; When the first flow direction intersection is located within the first dominant water guiding channel area, it is proved that the first dominant water guiding channel area is accurate, and a grouting operation is performed on the first dominant water guiding channel area.

2. The method for reconstructing a water-retaining and water-proof layer in a mining area by grouting according to claim 1, characterized in that: Also includes: When the first flow direction intersection is outside the first advantageous water channel area, the first preset resistivity is increased to reconstruct the first advantageous water channel area, and the same water flow direction test method is subsequently used to verify whether the first advantageous water channel area is accurate.

3. The method for reconstructing a water-retaining and water-proof layer in a mining area by grouting according to claim 1, characterized in that: The geophysical exploration in the coal mining and treatment area of ​​the mining area from the aquifer to the goaf includes: Obtaining geological parameters of the coal mining and treatment area, and determining a water source for water filling based on the geological parameters; When the water source is from the Quaternary aquifer, geophysical exploration is carried out from the surface to the goaf in the coal mining and treatment area.

4. The method for reconstructing a water-retaining and water-proof layer in a mining area by grouting according to claim 1, characterized in that: Also includes: After the grouting operation, geophysical exploration is conducted again in the coal mining and treatment area from the aquifer to the goaf to obtain a second apparent resistivity at each position in the space, and positions in the space where the second apparent resistivity is less than or equal to the first preset resistivity are selected to form a second dominant water channel area; When the second dominant water guiding channel area is located within the first dominant water guiding channel area, grouting is stopped.

5. The method for reconstructing a water-retaining and water-proof layer in a mining area by grouting according to claim 1, characterized in that: The obtaining of the first apparent resistivity of each position in the space then includes: selecting positions in the aquifer where the first apparent resistivity is less than or equal to the first preset resistivity to form a first region, where the area of ​​the first region is a first area; The method for reconstructing a water-retaining and aquicluded layer by grouting in a mining area also includes: after performing the grouting operation, conducting geophysical exploration again on the coal mining and management area from the aquifer to the goaf to obtain a second apparent resistivity at each position in the space, selecting positions in the aquifer where the second apparent resistivity is less than or equal to the first preset resistivity to form a second area, and the area of ​​the second area is a second area; when the second area is larger than the first area, stopping the grouting.

6. The method for reconstructing a water-retaining and water-proof layer in a mining area by grouting according to claim 1, characterized in that: Also includes: After the grouting operation, a water flow direction test is performed again on at least two monitoring wells in the coal mining and treatment area to obtain a second flow direction fitting function for each monitoring well, and two second flow direction fitting functions are selected to calculate a second flow direction intersection point corresponding to the two monitoring wells; When the second flow direction intersection is outside the first dominant water guide channel area, grouting is stopped.

7. The method for reconstructing a water-retaining and water-proof layer in a mining area by grouting according to claim 5, characterized in that: Also includes: When the second area is larger than the first area, the volume of the second dominant water channel region is less than or equal to a first preset ratio of the volume of the first dominant water channel region, and the second flow direction intersection is outside the first dominant water channel region, grouting is stopped.

8. The method for reconstructing a water-retaining and water-proof layer in a mining area by grouting according to claim 1, characterized in that: Also includes: After a preset time has passed since the grouting is completed, a water level test is conducted in a monitoring well within the coal mining and treatment area to obtain a first water level drop, and a water level test is conducted in a monitoring well outside the coal mining and treatment area to obtain a second water level drop; When the first water level drop is less than or equal to a second preset ratio of the second water level drop, water conservation is completed.

9. A mining area grouting water-retaining and water-proofing layer reconstruction device, using the mining area grouting water-retaining and water-proofing layer reconstruction method according to any one of claims 1 to 8, characterized in that: include: a geophysical exploration module configured to perform geophysical exploration in the coal mining and treatment area of ​​the mining area from the aquifer to the goaf, obtain a first apparent resistivity at each position in the space, and select positions in the space where the first apparent resistivity is less than or equal to a first preset resistivity to form a first dominant water channel area; a well logging module configured to perform water flow direction testing on at least two monitoring wells in the coal mining and remediation area, obtain a first flow direction fitting function for each of the monitoring wells, and select two of the first flow direction fitting functions to calculate a first flow direction intersection point corresponding to the two monitoring wells; The grouting module is configured to perform a grouting operation on the first advantageous water guiding channel area when the first flow direction intersection point is located within the first advantageous water guiding channel area, proving that the first advantageous water guiding channel area is accurate.

10. An electronic device, characterized in that: It includes a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the method for reconstructing the water-retaining and aquiclude layer in a mining area by grouting as described in any one of claims 1 to 8.

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