Groundwater protection method and device in coal mining area

Abstract

The present invention provides a method and device for protecting groundwater in a coal mining area. The method comprises: determining the hydrochemical background value of each aquifer within the influence range of a water-conducting fracture zone, and the hydrochemical characteristic value of each element in the mine water; determining a target layer from each aquifer based on the hydrochemical background value of each aquifer and the hydrochemical characteristic value of each element in the mine water; determining a transfer storage area from the target layer based on the groundwater movement speed and the recovery time; and transferring and storing the mine water to the transfer storage area to protect the groundwater in the coal mining area. The present invention transfers and stores mine water to a target layer with similar or slightly inferior water quality, does not deteriorate the groundwater environment, and effectively protects the groundwater in the coal mining area. In addition, the present invention determines the transfer storage area from the target layer based on the groundwater movement speed and the recovery time, thereby ensuring that within the recovery time, the mine water does not flow into the mine to form mine water inrush, thereby not affecting the mine recovery production.

Description

Technical Field

[0001] The present invention relates to the technical field of groundwater protection, and in particular to a method and device for groundwater protection in coal mining areas. Background Art

[0002] Roof overburden failure is a common phenomenon during coal mining. Roof instability caused by mining fractures the rock strata, creating numerous water-conducting fissures. These fissures affect the flow of surrounding groundwater, diverting some of the water into the mine working face, resulting in mine water inrush. This inrush not only poses a serious threat to mine safety but also has significant impacts on groundwater resources and the ecological environment. Summary of the Invention

[0003] The present invention provides a method and device for protecting groundwater in a coal mining area, which are used to solve the defects in the prior art.

[0004] The present invention provides a method for protecting groundwater in a coal mining area, comprising:

[0005] Determine the hydrochemical background values ​​of each aquifer within the influence range of the water-conducting fracture zone, as well as the hydrochemical characteristic values ​​of each element in the mine water;

[0006] Determining a target layer from each aquifer based on the hydrochemical background value of each aquifer and the hydrochemical characteristic value of each element in the mine water;

[0007] Determining a transfer storage area from the target layer based on groundwater movement velocity and recovery time;

[0008] The mine water is transferred and stored in the transfer storage area to protect the groundwater in the coal mining area.

[0009] According to a method for protecting groundwater in a coal mining area provided by the present invention, the step of transferring and storing the mine water to the transfer storage area comprises:

[0010] A hole is drilled in the transfer storage area, and the mine water is introduced into the hole to transfer and store the mine water in the transfer storage area.

[0011] According to a method for protecting groundwater in a coal mining area provided by the present invention, the drilling of a hole in the transfer and storage area comprises:

[0012] Using the bottom plate of the target layer as the final hole layer of the drilling, drilling a hole in the transfer storage area;

[0013] A casing is run into the drilled section above the top plate of the target layer, and after the casing is run into place, cementing operations are performed.

[0014] According to a method for protecting groundwater in a coal mine area provided by the present invention, introducing the mine water into the borehole comprises:

[0015] A mud pump is used to introduce the mine water into the borehole through a water pipe, and the water pipe is sealed and connected to the borehole opening.

[0016] According to a method for protecting groundwater in a coal mining area provided by the present invention, the target layer is determined from each aquifer based on the hydrochemical background value of each aquifer and the hydrochemical characteristic value of each element in the mine water, including:

[0017] The aquifer whose hydrochemical background value is less than or equal to the hydrochemical characteristic value of each element in the mine water is taken as the target layer.

[0018] According to a method for protecting groundwater in a coal mining area provided by the present invention, the method determines a transfer storage area from the target layer based on the groundwater movement speed and the recovery time, comprising:

[0019] Determining a return flow distance based on the groundwater movement speed and the recovery time;

[0020] In the case where the distance between any area of ​​the target layer and the mining area is greater than the reflow distance, the any area is used as the transfer storage area.

[0021] The present invention also provides a coal mining area groundwater protection device, comprising:

[0022] Characteristic value determination unit, used to determine the hydrochemical background value of each aquifer within the influence range of the water-conducting fracture zone, and the hydrochemical characteristic value of each element in the mine water;

[0023] a target layer determination unit, configured to determine the target layer from each aquifer based on the hydrochemical background value of each aquifer and the hydrochemical characteristic value of each element in the mine water;

[0024] a storage area determination unit, configured to determine a transfer storage area from the target layer based on groundwater movement speed and recovery time;

[0025] The groundwater protection unit is used to transfer and store the mine water to the transfer storage area to protect the groundwater in the coal mining area.

[0026] The present invention also provides an electronic device comprising 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, any of the above-described methods for protecting groundwater in coal mining areas is implemented.

[0027] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the above-mentioned methods for protecting groundwater in coal mining areas.

[0028] The present invention also provides a computer program product, comprising a computer program, which, when executed by a processor, implements any of the above-mentioned methods for protecting groundwater in coal mining areas.

[0029] The present invention provides a method and device for protecting groundwater in coal mining areas. Based on the hydrochemical background values ​​of each aquifer and the hydrochemical characteristic values ​​of each element in the mine water, a target layer is determined from each aquifer. This allows the mine water to be transferred and stored in a target layer with similar or slightly inferior water quality, without deteriorating the groundwater environment and effectively protecting the groundwater in the coal mining area. Furthermore, the present invention determines the transfer and storage area from the target layer based on the groundwater movement speed and the recovery time, thereby ensuring that, during the recovery time, the mine water does not flow into the mine, causing mine water inrush, thereby preventing the mine from affecting production. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 This is a schematic flow chart of the coal mining area groundwater protection method provided by the present invention;

[0032] Figure 2 This is a schematic structural diagram of the coal mining area groundwater protection device provided by the present invention;

[0033] Figure 3 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0035] Roof overburden failure is a common phenomenon during coal mining. Roof instability caused by mining fractures the rock strata, creating numerous water-conducting fissures. These fissures affect the flow of surrounding groundwater, diverting some of the water into the mine working face, resulting in mine water inrush. This inrush not only poses a serious threat to mine safety but also has significant impacts on groundwater resources and the ecological environment.

[0036] The present invention mainly addresses the problem of groundwater resources being destroyed by coal mining, and provides a groundwater protection method for coal mining areas. Based on the identification of the source of mine water gushing, the mine water is transferred to other areas of the same layer for storage, thereby achieving the purpose of protecting groundwater resources without polluting the groundwater environment.

[0037] The invention provides a method for protecting groundwater in a coal mining area. Figure 1 This is a schematic diagram of the process of the coal mining area groundwater protection method provided by the present invention, such as Figure 1 As shown, the method includes the following steps:

[0038] Step 110: Determine the hydrochemical background value of each aquifer within the influence range of the water-conducting fracture zone and the hydrochemical characteristic value of each element in the mine water.

[0039] Here, mine water refers to groundwater found in mines or around mineral deposits. Aquifers refer to groundwater stored and flowing in underground rock or soil layers.

[0040] The hydrochemical background value of each aquifer within the influence of a water-conducting fracture zone refers to the average or typical value of the chemical composition of the groundwater in each aquifer under natural conditions, unaffected by human activities within the region. Such chemical composition may include dissolved ions (such as calcium, magnesium, sodium, and chlorine), dissolved gases (such as oxygen, carbon dioxide, and hydrogen sulfide), pH, temperature, and salinity. Alternatively, the hydrochemical background value of each aquifer within the influence of a water-conducting fracture zone can be established through geological surveys.

[0041] For example, through geological surveys, it was learned that there are two main aquifers within the water-conducting fracture zone of a coal mine in area A. One is the Cretaceous Luohe Formation (k1l) aquifer, which has a mineralization of 1000-3000 mg / L, and the other is the Cretaceous Huanhe Huachi Formation (k1h) aquifer, which has a mineralization of 400-800 mg / L.

[0042] Furthermore, the hydrochemical characteristic values ​​of each element in mine water are used to characterize its chemical composition and properties. These values ​​can include salinity. Optionally, the hydrochemical characteristics of mine water can be analyzed and continuously monitored (including pre-drainage water). This allows understanding the hydrochemical characteristics and dynamic changes, and determining the hydrochemical characteristic values ​​of each element in the mine water. For example, by analyzing the hydrochemical characteristics of mine water, it can be determined that the salinity is 2800-2900 mg / L.

[0043] Step 120: Determine the target layer from each aquifer based on the hydrochemical background value of each aquifer and the hydrochemical characteristic value of each element in the mine water.

[0044] Specifically, after determining the hydrochemical background values ​​of each aquifer and the hydrochemical characteristic values ​​of each element in the mine water, a comparative analysis is performed on the hydrochemical background values ​​of each aquifer and the hydrochemical characteristic values ​​of each element in the mine water to determine the aquifer that is most suitable as the target layer.

[0045] Optionally, an aquifer with water chemical characteristic values ​​similar to or inferior to those of each element in mine water may be used as the target layer, that is, an aquifer with slightly poorer water quality may be used as the target layer.

[0046] Step 130: Determine a transfer storage area from the target layer based on the groundwater movement speed and the recovery time.

[0047] Step 140: Transfer and store the mine water to a transfer storage area to protect the groundwater in the coal mining area.

[0048] Specifically, groundwater movement velocity can be understood as the speed at which groundwater moves underground. For example, the groundwater permeability coefficient can be used as the groundwater movement velocity. Mining time can be understood as the length of time that mining activities are carried out in a mine.

[0049] After mine water is transferred and stored, it is necessary to ensure that the transferred mine water does not flow back into the mining area to avoid affecting coal mine production. Therefore, embodiments of the present invention combine the groundwater movement speed and mining time to determine the transfer storage area in the target layer. This allows the mine water to be transferred to the transfer storage area to protect the groundwater from the impact of mining.

[0050] The coal mining area groundwater protection method provided by the embodiments of the present invention determines a target layer from each aquifer based on the hydrochemical background values ​​of each aquifer and the hydrochemical characteristic values ​​of each element in the mine water. This allows the mine water to be transferred and stored in a target layer with similar or slightly inferior water quality, without deteriorating the groundwater environment and effectively protecting the groundwater in the coal mining area. Furthermore, the embodiments of the present invention determine the transfer and storage area from the target layer based on the groundwater movement speed and the recovery time, thereby ensuring that within the recovery time, the mine water does not flow into the mine and form mine water inrush, thereby preventing the mine recovery production from being affected.

[0051] Based on any of the above embodiments, transferring and storing the mine water to a transfer storage area includes:

[0052] Drill holes in the transfer storage area and introduce mine water into the holes to transfer and store the mine water in the transfer storage area.

[0053] Specifically, after selecting the transfer storage area, holes are drilled in the transfer storage area so that mine water can be introduced into the holes, thereby transferring and storing the mine water in the transfer storage area, thereby not deteriorating the groundwater environment and effectively protecting the groundwater in the coal mining area.

[0054] Based on any of the above embodiments, drilling a hole in the transfer storage area includes:

[0055] The bottom plate of the target layer is used as the final hole layer of the drilling, and a hole is drilled in the transfer storage area;

[0056] Casing is run into the drilled section above the top plate of the target formation, and after the casing is in place, cementing operations are carried out.

[0057] Specifically, the end hole layer can be understood as the end point of the drilling. When performing a drilling operation, the bottom plate of the target layer is used as the end point of the drilling, thereby ensuring that the depth of the drilling reaches the required target position.

[0058] Casing is installed in the borehole after drilling reaches a certain distance above the top of the target formation. The casing prevents formation collapse, prevents groundwater from entering the wellbore, and provides structural support. Once the casing is in place, cementing is performed. This involves injecting cement slurry and other curing materials around the casing to strengthen the wellbore structure and improve wellbore stability and sealing. The diameter of the target formation section must be no less than 110 mm (e.g., 245 mm). Either an open hole or a matching decorative pipe is used.

[0059] As an optional embodiment, when drilling, the hole diameter is 245mm, and after drilling to the top plate of the target layer, a 219mm casing is lowered. The hole diameter is 194mm, and after drilling to the bottom plate of the target layer, a 168mm casing is lowered as the target storage layer section.

[0060] Based on any of the above embodiments, introducing mine water into a borehole includes:

[0061] A mud pump is used to introduce mine water into the borehole through a water pipe, and the water pipe is sealed and connected to the borehole opening.

[0062] Specifically, when introducing mine water into a borehole, a slurry pump can be used to introduce the mine water through a water pipe (such as a pressure-resistant water pipe with a pressure tolerance greater than the water treatment pressure). The water pipe is then sealed to the borehole orifice, perhaps using a threaded connection. This allows the slurry pump to pressurize the mine water and inject it into the target formation. The diameter of the water pipe is determined based on the amount of water being processed, and is typically no less than 50 mm. The orifice pressure is typically 1 to 3 times the water pressure of the bottom plate of the target formation.

[0063] As an optional embodiment, a water pipe with a pressure resistance of 10 MPa can be used, with one end connected to the mud pump and the other end connected to the borehole. The borehole grouting pressure is 5.2 MPa (2.2 MPa times the water pressure of the target layer bottom plate).

[0064] Based on any of the above embodiments, determining a target layer from each aquifer based on the hydrochemical background value of each aquifer and the hydrochemical characteristic value of each element in the mine water includes:

[0065] The aquifer whose hydrochemical background value is less than or equal to the hydrochemical characteristic value of each element in mine water is taken as the target layer.

[0066] Specifically, the aquifer whose hydrochemical background value is less than or equal to the hydrochemical characteristic value of each element in the mine water can be understood as an aquifer with slightly poor water quality. The mine water is transferred and stored in the aquifer with slightly poor water quality as the target layer, so as not to deteriorate the groundwater environment and effectively protect the groundwater in the coal mining area.

[0067] For example, the aquifers include the Cretaceous Luohe Formation aquifer (k1l) and the Cretaceous Huanhe Huachi Formation aquifer (k1h). The Cretaceous Luohe Formation aquifer (k1l) has similar hydrochemical characteristics to mine water, and the hydrochemical characteristic values ​​of various elements in the mine water are superior to those of the Cretaceous Luohe Formation aquifer (k1l). Furthermore, the Cretaceous Luohe Formation aquifer (k1l) is determined to be the primary source of the mine water. Therefore, the Cretaceous Luohe Formation aquifer (k1l) is selected as the target layer.

[0068] Based on any of the above embodiments, determining a transfer storage area from a target layer based on groundwater movement speed and recovery time includes:

[0069] Determine the return flow distance based on the groundwater movement speed and the recovery time;

[0070] When the distance between any area of ​​the target layer and the mining area is greater than the reflow distance, any area will be used as a transfer storage area.

[0071] As an optional embodiment, the groundwater permeability coefficient K (m / d) can be regarded as the groundwater movement velocity v (m / d), and the mining time of the coal mine working face or mining area is recorded as t (d). After the mine water is transferred and stored, during the mining time of the working face or mining area, the transferred groundwater does not flow back to the working face or mining area, and does not affect the coal mine production. Therefore, the distance L (m) between the transfer storage area and the mining area should be greater than the product of the groundwater movement velocity v and the mining time t (i.e., the return flow distance), which can be expressed by the following formula:

[0072] L>v·t

[0073] The transfer storage area should satisfy the above formula in all directions. If there is a mining face or mining area in any direction, the selected area should satisfy the above formula before the mining of the mining area is completed.

[0074] For example, in the above example, the permeability coefficient of the Cretaceous Luohe Formation aquifer (k1l) is 1.10~1.71m / d, that is, 0.10<v<0.71m / d. The first mining face of the mine is the 1101 working face, and the mining time is 2 years. The first mining area involves a total of 5 working faces, and the average mining time is 2 years. The mining time of the first mining area is 10 years, that is, 3650 days. Therefore, the closest distance between the reinjection area and the first mining area is 4015m. The southwest of the first mining area of ​​the mine is a coal-free area, and there are no planned mining wells around it. Therefore, the area 0.5km southwest of the mine is selected as the groundwater transfer and storage area. In addition, the distance between this area and the first mining area is 4500m.

[0075] The coal mining area groundwater protection device provided by the present invention is described below. The coal mining area groundwater protection device described below and the coal mining area groundwater protection method described above can be referenced to each other.

[0076] Based on any of the above embodiments, Figure 2 This is a schematic diagram of the structure of the underground water protection device for coal mines provided by the present invention. Figure 2 As shown, the device includes:

[0077] The characteristic value determination unit 210 is used to determine the hydrochemical background value of each aquifer within the influence range of the water-conducting fracture zone and the hydrochemical characteristic value of each element in the mine water;

[0078] a target layer determination unit 220 for determining a target layer from each aquifer based on the hydrochemical background value of each aquifer and the hydrochemical characteristic value of each element in the mine water;

[0079] The storage area determination unit 230 is used to determine the transfer storage area from the target layer based on the groundwater movement speed and the recovery time;

[0080] The groundwater protection unit 240 is used to transfer and store mine water to a transfer storage area to protect the groundwater in the coal mining area.

[0081] Based on any of the above embodiments, transferring and storing the mine water to a transfer storage area includes:

[0082] Drill holes in the transfer storage area and introduce mine water into the holes to transfer and store the mine water in the transfer storage area.

[0083] Based on any of the above embodiments, drilling a hole in the transfer storage area includes:

[0084] The bottom plate of the target layer is used as the final hole layer of the drilling, and a hole is drilled in the transfer storage area;

[0085] Casing is run into the drilled section above the top plate of the target formation, and after the casing is in place, cementing operations are carried out.

[0086] Based on any of the above embodiments, introducing mine water into a borehole includes:

[0087] A mud pump is used to introduce mine water into the borehole through a water pipe, and the water pipe is sealed and connected to the borehole opening.

[0088] Based on any of the above embodiments, determining a target layer from each aquifer based on the hydrochemical background value of each aquifer and the hydrochemical characteristic value of each element in the mine water includes:

[0089] The aquifer whose hydrochemical background value is less than or equal to the hydrochemical characteristic value of each element in mine water is taken as the target layer.

[0090] Based on any of the above embodiments, determining a transfer storage area from a target layer based on groundwater movement speed and recovery time includes:

[0091] Determine the return flow distance based on the groundwater movement speed and the recovery time;

[0092] When the distance between any area of ​​the target layer and the mining area is greater than the reflow distance, any area will be used as a transfer storage area.

[0093] Figure 3 Schematic diagram of the structure of the electronic device provided by the present invention, such as Figure 3As shown, the electronic device may include: a processor 310, a memory 320, a communication interface 330, and a communication bus 340, wherein the processor 310, the memory 320, and the communication interface 330 communicate with each other via the communication bus 340. The processor 310 may call logic instructions in the memory 320 to execute a method for protecting groundwater in a coal mining area, the method comprising: determining the hydrochemical background value of each aquifer within the influence range of the water-conducting fracture zone and the hydrochemical characteristic value of each element in the mine water; determining a target layer from each aquifer based on the hydrochemical background value of each aquifer and the hydrochemical characteristic value of each element in the mine water; determining a transfer storage area from the target layer based on the groundwater movement speed and the recovery time; and transferring and storing the mine water to the transfer storage area to protect the groundwater in the coal mining area.

[0094] In addition, the logic instructions in the above-mentioned memory 320 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0095] On the other hand, the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by the computer, the computer can execute the coal mining area groundwater protection method provided by the above methods, which includes: determining the water chemical background value of each aquifer within the influence range of the water-conducting fracture zone, and the water chemical characteristic value of each element in the mine water; based on the water chemical background value of each aquifer and the water chemical characteristic value of each element in the mine water, determining the target layer from each aquifer; based on the groundwater movement speed and the recovery time, determining the transfer storage area from the target layer; transferring and storing the mine water to the transfer storage area to protect the groundwater in the coal mining area.

[0096] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the above-mentioned coal mining area groundwater protection methods provided, the methods comprising: determining the hydrochemical background value of each aquifer within the influence range of the water-conducting fracture zone, and the hydrochemical characteristic value of each element in the mine water; determining a target layer from each aquifer based on the hydrochemical background value of each aquifer and the hydrochemical characteristic value of each element in the mine water; determining a transfer storage area from the target layer based on the groundwater movement speed and the recovery time; and transferring and storing the mine water to the transfer storage area to protect the groundwater in the coal mining area.

[0097] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0098] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for protecting groundwater in coal mining areas, characterized in that: include: Determine the hydrochemical background values ​​of each aquifer within the influence range of the water-conducting fracture zone, as well as the hydrochemical characteristic values ​​of each element in the mine water; Determining a target layer from each aquifer based on the hydrochemical background value of each aquifer and the hydrochemical characteristic value of each element in the mine water; Determining a transfer storage area from the target layer based on groundwater movement velocity and recovery time; Transferring and storing the mine water to the transfer storage area to protect the groundwater in the coal mining area; The determining of the target layer from each aquifer based on the hydrochemical background value of each aquifer and the hydrochemical characteristic value of each element in the mine water includes: The aquifer whose water chemical background value is less than or equal to the water chemical characteristic value of each element in the mine water is taken as the target layer; The step of determining a transfer storage area from the target layer based on the groundwater movement speed and the recovery time includes: Determining a return flow distance based on the groundwater movement speed and the recovery time; In the case where the distance between any area of ​​the target layer and the mining area is greater than the reflow distance, the any area is used as the transfer storage area.

2. The method for protecting groundwater in coal mining areas according to claim 1, characterized in that: The step of transferring and storing the mine water to the transfer storage area comprises: A hole is drilled in the transfer storage area, and the mine water is introduced into the hole to transfer and store the mine water in the transfer storage area.

3. The method for protecting underground water in coal mining areas according to claim 2, characterized in that: The drilling of holes in the transfer storage area comprises: Using the bottom plate of the target layer as the final hole layer of the drilling, drilling a hole in the transfer storage area; A casing is run into the drilled section above the top plate of the target layer, and after the casing is run into place, cementing operations are performed.

4. The method for protecting groundwater in coal mining areas according to claim 2, characterized in that: The step of introducing the mine water into the borehole comprises: A mud pump is used to introduce the mine water into the borehole through a water pipe, and the water pipe is sealed and connected to the borehole opening.

5. An electronic device comprising 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 protecting groundwater in coal mining areas as described in any one of claims 1 to 4 is implemented.

6. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for protecting groundwater in a coal mining area as claimed in any one of claims 1 to 4 is implemented.

7. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the method for protecting groundwater in a coal mining area as claimed in any one of claims 1 to 4 is implemented.

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