Mining area grouting water-retaining and water-resisting layer reconstruction method and related equipment

Abstract

The invention provides a method for reconstructing a grouting, water-retaining and water-resisting layer in a mining area and related equipment. Geophysical prospecting is carried out in a coal mining treatment area of a mining area from a water-bearing layer to a goaf, first apparent resistivity of all positions in a space is obtained, and the positions with the first apparent resistivity smaller than or equal to first preset resistivity in the space are selected to form a first dominant water guiding channel area; performing water flow direction testing 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 selecting two first flow direction fitting functions to calculate a first flow direction intersection point of the two corresponding monitoring wells; and when the first flow direction intersection point is located in the first dominant water guide channel area, grouting operation is conducted on the first dominant water guide channel area. The mining area grouting water-retaining and water-resisting layer reconstruction method and the related equipment provided by the invention are simple and convenient, grouting water retention can be quickly and accurately realized, the cost is low, and the loss of superficial water resources is effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of grouting repair, and in particular to a method for reconstructing a grouting water-retaining and water-proofing layer 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 comprehensive mechanized mining, the full height is mined at one time, and the roof is managed by the entire caving method, if the thickness of the impermeable soil layer under the bedrock and the loose layer is insufficient, the water-conducting fracture zone will directly conduct the gasified bedrock and even the 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 the regional ecology.

[0003] In order to achieve water-saving coal mining, it is necessary to inject grouting under the loose layer of the Quaternary system to recreate the impermeable layer. However, the conventional treatment method is to inject grouting into the missing and weak areas of the soil layer in the mining area. The large amount of grouting and drilling engineering, on the one hand, is likely to affect the groundwater quality and environment, and on the other hand, it also consumes a lot of manpower and material resources and is costly. Therefore, a more efficient method of grouting 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 water-proof layer in a mining area by grouting to solve the above-mentioned 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 an aquifer to a 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 guiding channel area; conducting a water flow direction test 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 located within the first dominant water guiding channel area, performing a grouting operation on the first dominant water guiding channel area.

[0006] Furthermore, the method for reconstructing the grouting water-retaining and water-proof layer in the mining area also includes: when the first flow direction intersection is located outside the first dominant water channel area, the first preset resistivity is increased to reconstitute 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 according to the geological parameters; when the water source 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 method for reconstructing the water-retaining and water-proof layer by grouting in the mining area also includes: after 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, and selecting the positions in the space where the second apparent resistivity is less than or equal to the first preset resistivity to form a second dominant water channel area; when the second dominant water channel area is located within the first dominant water channel area, stopping the grouting.

[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 a water-retaining and aquiclude layer by grouting in a mining area also includes: after 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, the grouting is stopped.

[0010] Furthermore, the method for reconstructing the water-retaining and aquiclude by grouting in the mining area also includes: after the grouting operation, conducting a water flow direction test on at least two of the monitoring wells in the coal mining management area again to obtain a second flow direction fitting function for each of the monitoring wells, 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 the grouting.

[0011] Furthermore, the mining area grouting water-retaining and waterproofing layer 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, the grouting is stopped.

[0012] Furthermore, the method for reconstructing a water-retaining and aquiclude by grouting in a mining area 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 management area to obtain a first water level drop, and a water level test is conducted in a monitoring well outside the coal mining 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 aquicluder 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 a water flow direction test in 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 a grouting operation 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, wherein 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 water-retaining and aquiclude layer in the mining area grouting 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 water-retaining and aquiclude layer in a mining area by grouting as described in the first aspect above.

[0017] From the above, it can be seen that the present application provides a method for reconstructing a water-retaining and water-proof layer in a mining area by grouting and related equipment, and the method for reconstructing a water-retaining and water-proof layer in a mining area by grouting includes: conducting geophysical exploration from the aquifer to the goaf in the coal mining and management area of ​​the mining area to obtain the first apparent resistivity of each position in the space, and selecting 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 guiding channel area; conducting water flow direction tests in at least two monitoring wells in the coal mining and management area to obtain the first flow direction fitting function of each monitoring well, and selecting two first flow direction fitting functions to calculate the first flow direction intersection point corresponding to the two monitoring wells; when the first flow direction intersection point is located within the first dominant water guiding channel area, grouting operation is performed on the first dominant water guiding channel area. The first dominant water channel area is initially obtained through geophysical exploration, and then the first flow direction intersection is obtained by flow direction test, and the first dominant water channel area is verified. When the first flow direction intersection is within the first dominant water channel area, it represents that the first dominant water channel area is relatively accurate. Grouting operation is only performed on the first dominant water channel area to reconstruct the aquiclude, and the water conservation effect of the coal mining management area can be achieved; it avoids the blind construction of traditional methods, reduces unnecessary drilling and construction, reduces the overall management cost, and reduces the impact on the environment to a certain extent. The mining area grouting water conservation aquiclude reconstruction method and related equipment are simple and convenient, can quickly and accurately achieve grouting water conservation, low cost, and effectively reduce the loss of shallow water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of a process for reconstructing a water-retaining and water-proofing layer in a mining area by grouting in an embodiment of the present application;

[0020] Figure 2 Radar chart for flow direction testing;

[0021] Figure 3 This is a schematic structural diagram of a mining area grouting water-retaining and water-proofing layer reconstruction device in an embodiment of the present application;

[0022] Figure 4 This is a schematic diagram of the structure of an electronic device in an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying 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 be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of 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 can 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 comprehensive mechanized mining, full-height mining at one time, and all-caving method to manage the roof, if the thickness of the impermeable soil layer under the bedrock and loose layer is insufficient, the water-conducting fracture zone directly conducts the gasified bedrock or even the loose layer in the local section, resulting in a series of problems such as the gradual decrease of the water level of the shallow loose layer of the Quaternary system with the progress of coal mining, the disappearance of surface runoff, and the deterioration of regional ecology. In order to achieve water-saving coal mining, it is necessary to grout under the Quaternary loose layer to reconstruct the impermeable layer. However, the conventional treatment method is to grout the missing and weak areas of the soil layer in the mining area. The large amount of grouting and drilling engineering, on the one hand, is easy to affect the groundwater quality and environment, and on the other hand, it also consumes a lot of manpower and material resources, and the cost is high. Therefore, a more efficient grouting water conservation method for mining areas is urgently needed.

[0026] Based on the above situation, a horizontal aquiclude can be constructed by grouting at the advantageous water-passing channels in the weathered bedrock layer, cutting off the supply of Quaternary water to the mine water, and achieving water conservation in the Quaternary aquifer. The usual method is to reconstruct the aquiclude by grouting the entire area, which will undoubtedly increase the cost. At the same time, due to the influence of complex geological stress, the difficulty of construction in the entire area will also increase. Therefore, how to accurately select the area where the advantageous water-conducting channel is located for the reconstruction of the aquiclude is an urgent problem to be solved.

[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 water-proofing 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 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.

[0030] The coal mining management 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 is referred to as geophysical exploration, which refers to the detection of geological conditions such as stratum lithology and geological structure by studying and observing the changes of various geophysical fields. In this embodiment, geophysical exploration, for example, uses transient electromagnetic method (TEM) as an effective means to detect underground low-resistance bodies (such as aquifers and water-rich areas), and operates on the principle of electromagnetic induction. Specifically, it emits horizontal transient electromagnetic fields and observes the propagation and attenuation characteristics of these fields in underground media to infer the electrical characteristics of underground media, thereby analyzing the distribution and water-richness of groundwater. The transient electromagnetic algorithm can accurately capture the core information such as the distribution of underground aquifers related to water-filled water 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, that is, their resistivity is lower. Through the measurement of transient electromagnetic method, the first apparent resistivity of the underground medium can be obtained, and these data can be used to draw apparent resistivity profiles or slices, which intuitively reveal 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, without specific limitation. 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 the position where the first apparent resistivity is less than or equal to the first preset resistivity, c is 1; for the position 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 in this area to achieve water conservation.

[0033] S2. Conduct water flow direction tests in at least two monitoring wells in the coal mining 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 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 not be less than 15 minutes. After the velocity and direction are stable, obtain the radar map of a certain layer, such as Figure 2 As shown in the figure, 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, wherein x and y represent the horizontal positions of the dominant water-conducting channels, 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 the radar map of the same layer is obtained. The first flow direction fitting function y=bx+n is obtained by using the same coordinate system fitting function. 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), and 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, which 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 is carried out on the weathered bedrock aquifer only 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 carried out on multiple monitoring wells, multiple first flow direction fitting functions will be obtained. The equation groups can be constructed two by two to solve the corresponding first flow direction intersection points. When all the first flow direction intersection points are located within the first dominant water guiding channel area, grouting operation is performed on the first dominant water guiding channel area, which is more accurate but the cost also increases accordingly.

[0039] For the specific grouting operation, a detailed reconstruction plan will be formulated according to the scope of reconstruction of the aquifer and the geological conditions. This includes the selection of grouting materials, setting of grouting pressure, construction details of 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 test. 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. Only grouting operation is performed on the first advantageous water channel area to reconstruct the waterproof layer, 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] The reconstruction method of the grouting water-retaining and water-proofing layer in the mining area is simple and convenient, which can quickly and accurately realize grouting water retention, with low cost, and effectively reduce the loss of shallow water resources. Through the application of geophysical prospecting technology combined with well logging technology, the water-rich areas and water-rich conditions in the treatment area can be quickly and accurately identified, avoiding the blind construction of traditional methods. It reduces unnecessary drilling and construction, reduces the overall treatment cost and reduces the impact on the environment to a certain extent. The real-time monitoring system provides feedback, so that the treatment measures can be dynamically adjusted to ensure the long-term maintenance of the treatment effect.

[0042] In some embodiments, the mining area grouting water-retaining and water-proofing layer 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-conducted from the surface to the goaf in the coal mining management area to obtain the first apparent resistivity of each position in the space.

[0044] like If the value is 0, 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 treatment area includes:

[0046] S101. Obtain geological parameters of the coal mining and management area, and determine a water source for water filling according to 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 strata can be determined based on the thickness of the strata. The thickness of the strata in the weak areas is less than the thickness of the conventional stable soil layer, and the threshold screening can be set according to the engineering needs. The thickness of the strata in the missing areas is 0, and the scope of the weak and missing areas of the strata is the scope of the coal mining management area.

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

[0050] Take a coal mine in the western region as an example. Its coal-bearing strata belong to the Yan'an Formation of the Middle Jurassic System. The coexistence characteristics of coal seams and aquifers are that the coal seams are below and the aquifers are above. The aquifers in the well field are, from top to bottom, the Quaternary phreatic aquifer, the Jurassic weathered bedrock aquifer, and the Jurassic bedrock aquifer; the aquiclude is mainly the Neogene soil aquiclude (there are some missing areas); the main coal seam currently mined is the 3-1 coal seam of the Yan'an Formation of the Jurassic System, and the water-conducting fracture zone it produces has developed to the weathered bedrock aquifer, resulting in the weathered bedrock groundwater and the Quaternary phreatic water on the roof of the coal seam becoming the main sources of water in weak and missing soil areas.

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

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

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

[0054] S501. After the grouting operation is performed, geophysical exploration is conducted again on the coal mining 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.

[0055] After the grouting operation, in order to verify the grouting effect, geophysical exploration may 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 aforementioned method for obtaining the first dominant water channel area.

[0056] S502: When the second dominant water guiding channel area is located within the first dominant 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 blocking effect of grouting is effective and grouting can be stopped.

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

[0059] S103. Select 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.

[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 water-proofing layer reconstruction method further includes:

[0062] S511. After the grouting operation is performed, geophysical exploration is conducted again on the coal mining 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 may 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 aforementioned 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 plugging effect of grouting is effective and grouting can be stopped.

[0066] In some embodiments, the mining area grouting water-retaining and water-proofing layer 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 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 intersection of the second flow directions is outside the area of ​​the first dominant water guiding channel, 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 sealing effect of the grouting is effective and the grouting can be stopped.

[0071] In some embodiments, the mining area grouting water-retaining and water-proofing layer 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 joint judgment, wherein the first preset ratio is, for example, 5%, which is not specifically limited. 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 water-proofing layer reconstruction method further includes:

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

[0076] After the grouting is completed, the long observation holes and supplementary survey 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 limitation. The water level test is carried out in the monitoring wells within the coal mining 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 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 management area drops very little, indicating that the water conservation effect is continuously 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 receiving an active request from a user, a prompt message is sent to the user to clearly remind the user that the operation requested to be performed will require obtaining and using the user's personal information. Thus, the user can independently choose whether to provide personal information to software or hardware such as an electronic device, application, server, or storage medium that performs the operation of the technical solution of the present disclosure according to the prompt message.

[0081] As an optional but non-limiting implementation, in response to receiving the 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. In addition, the pop-up window may also carry a selection control for the user to choose "agree" or "disagree" to provide personal information to the electronic device.

[0082] It is understandable that the above notification and the process of obtaining user authorization are merely illustrative and do not constitute a limitation on the implementation of the present disclosure. Other methods that meet 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-proofing 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 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; 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 waterproofing layer 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, the present application also 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 program, the method for reconstructing the grouting water-retaining and aquiclude layer in a mining area described in any of the above embodiments is implemented.

[0086] Figure 4 A more specific schematic diagram of the hardware structure of an electronic device provided in this embodiment is shown, and the device may include: a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040 and a bus 1050. It is characterized in that the processor 1010, the memory 1020, the input / output interface 1030 and the communication interface 1040 realize communication connection with each other inside the device through the bus 1050.

[0087] The processor 1010 can be implemented by 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 may be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 may store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program codes are stored in the memory 1020 and are called and executed by the processor 1010.

[0089] The input / output interface 1030 is used to connect the input / output module to realize information input and output. The input / output module can be configured as a component in the device (not shown in the figure), or it can be externally connected to the device to provide corresponding functions. It is characterized in that the input device can include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output device can include a display, a speaker, a vibrator, an indicator light, etc.

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

[0091] The bus 1050 includes a path that transmits 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 the specific implementation process, the device may also include other components necessary for normal operation. In addition, it can be understood by those skilled in the art that the above device may also only include the components necessary for implementing the embodiments of the present specification, and does not necessarily include all the components shown in the figure.

[0093] The electronic device of the above-mentioned embodiment is used to implement the corresponding mining area grouting water-retaining and waterproofing layer reconstruction method in any of the above-mentioned 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, wherein the non-transitory computer-readable storage medium 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 any of the above embodiments.

[0095] The non-transitory computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. 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 disk read-only memory (CD-ROM), digital versatile disk (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 describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some 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. In line with the concept 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, to simplify the description and discussion, and in order not to make the embodiment of the present application difficult to understand, the known power supply / ground connection with other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiment of the present application difficult to understand, and this also takes into account the following fact, that is, the details of the implementation method of these block diagram devices are highly dependent on the platform to be implemented in the embodiment of the present application (that is, these details should be completely within the scope of understanding of those skilled in the art). In the case of elaborating specific details to describe the exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiment of the present 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 the specific embodiments of the present application, many replacements, modifications and variations of these embodiments will be apparent to those of ordinary skill in the art based on the foregoing description. The present application embodiments are intended to encompass all such replacements, 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 in the protection scope 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 from the aquifer to the goaf in the coal mining and management area of ​​the mining area to obtain the first apparent resistivity of each position in the space, and selecting the positions in the space where the first apparent resistivity is less than or equal to the first preset resistivity to form a first advantageous water channel area; Conduct 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 select 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, a grouting operation is performed on the first dominant water guiding channel area.

2. The method for reconstructing a water-retaining and water-proofing layer in a mining area according to claim 1, characterized in that: Also includes: When the first flow direction intersection is outside the first dominant water channel area, the first preset resistivity is increased to reconstitute the first dominant water channel area, or geophysical exploration is re-performed from the surface to the goaf in the coal mining management area to obtain the first apparent resistivity of each position in the space.

3. The method for reconstructing a water-retaining and water-proofing layer in a mining area according to claim 1, characterized in that: The said geophysical exploration from the surface to the goaf in the coal mining and treatment area includes: Obtaining geological parameters of the coal mining and treatment area, and determining a water source for water filling according to 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 management area.

4. The method for reconstructing a water-retaining and water-proofing layer in a mining area 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 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 advantageous water channel area; When the second dominant water guiding channel area is located within the first dominant water guiding channel area, the grouting is stopped.

5. The method for reconstructing a water-retaining and water-proofing layer in a mining area by grouting according to claim 1, characterized in that: The step 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, where the area of ​​the first region is a first area; The method for reconstructing a water-retaining and aquiclude by grouting in a mining area 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 a second apparent resistivity at 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 a second area; when the second area is larger than the first area, grouting is stopped.

6. The method for reconstructing a water-retaining and water-proofing layer in a mining area according to claim 1, characterized in that: Also includes: After the grouting operation is performed, 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 the second flow direction intersection points corresponding to the two monitoring wells; When the second flow direction intersection is outside the first dominant water guiding channel area, the grouting is stopped.

7. The method for reconstructing a water-retaining and water-proofing layer in a mining area according to claim 1, 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-proofing layer in a mining area according to claim 1, characterized in that: Also includes: After a preset time has passed since the grouting was 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; 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 device for reconstructing a water-retaining and water-proofing layer in a mining area, characterized in that: include: The geophysical exploration module is 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 of 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; The well logging module is configured to perform water flow direction testing in 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 first flow direction intersection points corresponding to the two monitoring wells; The grouting module is configured to perform 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.

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 mining area grouting water-retaining and aquiclude layer as described in any one of claims 1 to 8.

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