CN112901271A - Method for constructing underground water storage space in secondary stratum - Google Patents
Method for constructing underground water storage space in secondary stratum Download PDFInfo
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- CN112901271A CN112901271A CN202110287425.5A CN202110287425A CN112901271A CN 112901271 A CN112901271 A CN 112901271A CN 202110287425 A CN202110287425 A CN 202110287425A CN 112901271 A CN112901271 A CN 112901271A
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- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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Abstract
The invention provides a method for constructing an underground water storage space in a secondary stratum, which comprises the following steps: determining a first target space according to a geological analysis result of a target mining area; constructing a first passage between the location of the purified mine water and a first target space, so that the purified mine water is reinjected to the first target space through the first passage to form an underground water storage space; wherein the first target space is located in a middle generation stratum; the first target space has water-storage and/or water-permeability properties; the first target space has water permeability, and the first target space comprises a water guide structure and/or the permeability of the first target space is greater than a permeability threshold; a water-conducting formation, including pores or fissures. The method for constructing the underground water storage space by using the secondary stratum provided by the invention can fully utilize the space of the deep stratum, the constructed underground water storage space has larger capacity, the risk of water permeation in the subsequent production of the target mining area can be reduced, the underground water can be supplemented, and the ecological water environment can be protected.
Description
Technical Field
The invention relates to the technical field of mining engineering, in particular to a method for constructing an underground water storage space in a secondary stratum.
Background
In recent years, with the increasing population and the rapid development of the economic society, the water consumption is increased sharply, and the underground water storage capacity is reduced year by year. On one hand, the decrease of the underground water reserves can easily cause ground settlement, ground cracks, seawater invasion, water environment pollution and other environmental geological disasters and ecological environment damages. On the other hand, the shortage of underground water resources can be caused, and even the underground water resources are exhausted.
In the prior art, an underground water storage space is usually constructed based on a mined-out space, the water storage space of the underground water storage space is limited, water damage accidents can be caused, and the effect of supplementing underground water resources is not good.
Disclosure of Invention
The invention provides a method for constructing an underground water storage space in a secondary stratum, which is used for solving the defects that the underground water storage space in the prior art is limited in water storage space, water damage accidents can be caused, and the effect of supplementing underground water resources is poor, and realizing the underground water storage space which is larger in constructed water storage space, smaller in potential safety hazard and capable of supplementing underground water resources.
The invention provides a method for constructing an underground water storage space in a secondary stratum, which comprises the following steps:
determining a first target space according to a geological analysis result of a target mining area;
constructing a first passage between the location of the purified mine water and the first target space, so that the purified mine water is reinjected to the first target space through the first passage to form an underground water storage space;
wherein the first target space is located in a medium-generation stratum; the first target space has water-retaining and/or water-permeable properties; the first target space has water permeability, which means that the first target space comprises a water guide structure and/or the permeability of the first target space is greater than a permeability threshold; the water-conducting structure comprises pores or fissures.
According to the method for constructing the underground water storage space by the medium-generation stratum, provided by the invention, the first target space is positioned in a stratum below 1000 meters.
According to the method for constructing the underground water storage space in the mesogen stratum provided by the invention, the first passage is constructed between the location of the purified mine water and the first target space, so that the purified mine water is reinjected to the first target space through the first passage to form the underground water storage space, and the method specifically comprises the following steps:
and under the condition that the first target space has water storage performance, the purified mine water is reinjected to the first target space through the first passage to form an underground water storage space.
According to the method for constructing the underground water storage space in the mesogen stratum provided by the invention, the first passage is constructed between the location of the purified mine water and the first target space, so that the purified mine water is reinjected to the first target space through the first passage to form the underground water storage space, and the method specifically comprises the following steps:
constructing a second passage between the first target space and a second target space below the first target space based on the water guiding configuration in the first target space in a case where the first target space includes the water guiding configuration;
reinjecting the purified mine water to the first target space through the first passage, so that the purified mine water flows back to the second target space through the second passage to form an underground water storage space;
wherein the first passage is in communication with the second passage.
According to the method for constructing the underground water storage space in the mesogen stratum provided by the invention, the first passage is constructed between the location of the purified mine water and the first target space, so that the purified mine water is reinjected to the first target space through the first passage to form the underground water storage space, and the method specifically comprises the following steps:
constructing a second passage between the first target space and a second target space below the first target space based on the water guiding structure in the first target space if the first target space includes a water guiding structure and the permeability of the first target space is greater than a permeability threshold;
reinjecting the purified mine water to the first target space through the first passage so that the purified mine water permeates and flows back to the second target space through the second passage to form an underground water storage space;
wherein the first passage is in communication with the second passage.
According to the method for constructing the underground water storage space in the mesogen stratum provided by the invention, the first passage is constructed between the location of the purified mine water and the first target space, and the method specifically comprises the following steps:
and communicating the location of the purified mine water with the first target space through a drilling project to construct the first passage.
According to the method for constructing the underground water storage space by the mesogenic strata, which is provided by the invention, the second passage is constructed between the first target space and the second target space below the first target space based on the water guide structure in the first target space, and the method specifically comprises the following steps:
and communicating a plurality of water guide structures in the first target space through a horizontal directional drilling machine, constructing a second passage penetrating through the first target space from top to bottom, and communicating the second passage and the first passage.
According to the method for constructing the underground water storage space in the secondary stratum provided by the invention, the first target space is determined according to the geological analysis result of the target mining area, and the method specifically comprises the following steps:
determining one or more alternative first target spaces according to the geological analysis result of the target mining area;
determining part or all of the alternative first target spaces as the first target spaces based on geological features of the alternative first target spaces;
wherein the geological feature comprises: at least one of orientation, volume, permeability, and pore fracture development characteristics.
According to the method for constructing the underground water storage space in the secondary stratum provided by the invention, before the first target space is determined according to the geological analysis result of the target mining area, the method further comprises the following steps:
and carrying out geological analysis on the target mining area to obtain a geological analysis result of the target mining area.
According to the method for constructing the underground water storage space in the mesogenic stratum provided by the invention, before the purified mine water is reinjected to the first target space to form the underground water storage space, the method further comprises the following steps:
collecting mine water in the target mining area;
and purifying the mine water to obtain the purified mine water.
According to the method for constructing the underground water storage space by the secondary stratum, the first target space is determined in the deep stratum below the operation stratum of the target mining area according to the geological analysis result of the target mining area, the purified mine water is injected back to the first target space through the first passage to form the underground water storage space, compared with the method for constructing the underground water storage space by constructing a reservoir on the ground surface or constructing the underground water storage space on a shallower stratum, the space of the deep stratum can be fully utilized, the constructed underground water storage space has larger capacity, the risk of water permeation of the operation layer in the subsequent production of the target mining area can be reduced, the underground water can be supplemented, the problems of ground settlement, ground cracks and the like caused by the reduction of underground water storage capacity can be solved, the ecological water environment can be protected, and the cost investment for constructing the underground water storage space on the deep stratum is lower.
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In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for constructing an underground water storage space by using a secondary stratum provided by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
To facilitate an understanding of the various embodiments of the present invention, the inventive concept of constructing an underground water storage space is described below.
Under the conventional condition, the purified mine water is reinjected to the coal mining empty layer, and an underground water storage space can be formed in the coal mining empty layer. Coal seams are typically located in formations between 50 and 300 meters below ground. The capacity of the underground water storage space constructed in the coal mining empty layer is the same as that of the coal mining empty layer, and the water storage space is limited. After the underground water storage space is constructed on the coal mining empty layer, later maintenance is difficult. In addition, in the subsequent production process of the mining area, the mining operation layer may be located in the stratum below the underground water storage space, and the mining operation layer may be permeable to water, so that great potential safety hazards exist. The mine water is pumped to the ground surface for treatment and utilization, more energy sources need to be consumed, and the generated cost is higher.
According to the embodiment of the invention, the underground water storage space is constructed in the deep stratum below the operation stratum of the target mining area, so that the space of the deep stratum can be fully utilized, and the land space is saved. Particularly, the underground water storage space constructed in the deep stratum has large water storage capacity which can reach the water storage capacity of hundreds of thousands of cubic meters. The underground water storage space is constructed in the deep stratum, only one-time cost is needed to be invested in construction, later maintenance is not needed, and the total cost is low. The underground water storage space constructed in the deep stratum can supplement underground water, so that the problems of ground settlement, ground cracks and the like caused by the reduction of underground water reserves can be solved, and the ecological water environment is protected.
It should be noted that the deep stratum may refer to a stratum 800 m to 2000 m underground below the operation stratum of the target mining area.
FIG. 1 is a schematic flow chart of a method for constructing an underground water storage space by using a secondary stratum provided by the invention. The method for constructing the underground water storage space by the medium-age stratum of the invention is described in the following with reference to fig. 1. As shown in fig. 1, the method includes: step 101, determining a first target space according to a geological analysis result of a target mining area.
Wherein the first target space is located in a middle generation stratum; the first target space has water-storage and/or water-permeability properties; the first target space has water permeability, and the first target space comprises a water guide structure and/or the permeability of the first target space is greater than a permeability threshold; a water-conducting formation, including pores or fissures.
The mining area can refer to the area where the mineral products are located, and a plurality of mines can be arranged in the mining area.
The mineral products can include coal mine, metal ore, rare metal ore or rare earth ore, etc. The method for constructing the underground water storage space in the secondary stratum in the embodiment of the invention is described below by taking a coal mining area as an example.
The geological analysis result of the target mining area can comprise: the distribution of various underground stratums of the target mining area, the distribution of underground water of the target mining area (such as the distribution law of the underground water, the confluence direction of the underground water or underground rivers, a supply channel of the underground water and the like), various underground geological structures of the target mining area and the like.
According to the geological analysis result of the target mining area, the first target space can be determined in the middle generation stratum below the operation stratum of the target mining area.
According to the geological analysis result of the target mining area, the space with the water storage structure below the operation stratum of the target mining area can be used as the first target space, so that the first target space has water storage performance, and a certain amount of water can be stored. The water storage structure refers to a geological structure in which groundwater can be enriched and stored.
According to the geological analysis result of the target mining area, any space with better pore fracture development and/or permeability below the operation stratum of the target mining area can be used as a first target space, so that the first target space has water storage performance and water permeability, a certain amount of water can be accumulated, and a considerable amount of water can be allowed to permeate.
According to the geological analysis result of the target mining area, the space where any pore fracture develops below the operation stratum of the target mining area can be used as a first target space, so that the first target space has water permeability and can allow a considerable amount of water to permeate through.
It should be noted that when a pore fracture develops in the first target space, the first target space includes pores or fractures, which may be referred to as water-conducting structures.
It should be noted that the permeability of the first target space may be indicated by a permeability threshold. The permeability of the first target space is greater than the permeability threshold, which means that the permeability of the first target space is better, and the first target space has water permeability, so that a considerable amount of water can be allowed to permeate the first target space. The permeability threshold can be determined according to actual conditions. The specific value of the permeability threshold is not particularly limited in the embodiments of the present invention.
102, constructing a first passage between the location of the purified mine water and the first target space, so that the purified mine water is reinjected to the first target space through the first passage to form an underground water storage space.
Mine water is produced in the production process of the coal mine area. Mine water refers to all underground water and/or surface water which seeps into an underground excavation space in the coal mining process. After the groundwater and/or surface water seeps into the mining space, the groundwater and/or surface water contacts with the coal seam and rock stratum and is influenced by human activities, and a series of physical, chemical and biochemical reactions can occur. The discharge of mine water is one of the pollution sources with industrial characteristics in the coal industry. The mine water is purified and utilized, and great economic and social benefits can be brought.
After the location of the purified mine water is communicated with the first target space, the purified mine water can be reinjected to the first target space.
Through communicating the location of the purified mine water with the first target space, the purified mine water can be reinjected to the first target space. The path between the location of the purified mine water and the first target space can be called as a first path.
It should be noted that a plurality of first passages may be provided between the location of the mine water after purification and the first target space.
If the first target space has water storage performance, the purified mine water can be continuously accumulated in the first target space after being reinjected to the first target space through the first passage, so that an underground water storage space is formed. If the first target space has water storage performance and water permeability, after the purified mine water is reinjected to the first target space through the first passage, the first target space can contain a certain amount of purified mine water, the purified mine water can also flow into a stratum below the first target space through the first target space, and the underground water storage space can be formed by the first target space and the stratum below the first target space. If the first target space has water permeability, the purified mine water can flow into a stratum below the first target space through the first target space after being reinjected into the first target space through the first passage, and the underground water storage space can be formed by the first target space and the stratum below the first target space.
It should be noted that the water quality of the purified mine water needs to be higher than or equal to that of the underground water, and the purified mine water can be reinjected to the first target space through the first passage.
According to the embodiment of the invention, after the first target space is determined in the deep stratum below the operation stratum of the target mining area according to the geological analysis result of the target mining area, the purified mine water is reinjected to the first target space through the first passage to form the underground water storage space.
Based on the above description of the embodiments, the first target space is located in a formation below 1000 meters.
Specifically, the first horizontal mining depth of a newly-built large and medium-sized mine of the non-outburst coal seam is not more than 1000 meters, the reconstruction and extension are not more than 1200 meters, the small-sized mine is not more than 600 meters, the depth of the newly-built mine of the outburst coal seam is not more than 800 meters, and the production extension is not more than 1200 meters.
The first target space is located in the stratum below 1000 meters, so that the first target space is located below the target mining area operation stratum, the constructed underground water storage space is prevented from being located above the target mining area operation stratum, and the risk of water permeation accidents is reduced.
In the embodiment of the invention, the first target space is determined in the stratum below 1000 m, so that the purified mine water is reinjected into the first target space to form the underground water storage space, compared with the construction of a reservoir on the ground surface or the construction of the underground water storage space in a shallower stratum, the space of a deep stratum can be fully utilized, the capacity of the constructed underground water storage space is larger, the risk of water permeation of an operation layer in the subsequent production of a target mining area can be reduced, the underground water can be supplemented, the problems of ground settlement, ground cracks and the like caused by the reduction of underground water storage capacity can be solved, and the ecological water environment can be protected.
Based on the content of each embodiment, a first passage is constructed between the location of the purified mine water and the first target space, so that the underground water storage space is formed after the purified mine water is reinjected to the first target space through the first passage, and the method specifically comprises the following steps: and under the condition that the first target space has water storage performance, the purified mine water is reinjected to the first target space through the first passage to form an underground water storage space.
Specifically, the upper end of the first passage is connected with the location of the purified mine water, and the lower end of the first passage is connected with the first target space.
The mine water after purification can be poured into from the upper end of first passageway, and the mine water after purification can be under the action of gravity, and along first passageway reinjection to first target space to constantly save in first target space, form underground water storage space.
It should be noted that the location of the mine water after purification may be a storage space for storing the mine water after purification in a target mine area, for example: and (4) a clear water tank. The location of the purified mine water can also be a system for purifying the mine water in a target mine area, and after the system for purifying the mine water purifies the mine water, the purified mine water can be directly reinjected to a first target space through a first passage.
According to the embodiment of the invention, the purified mine water is reinjected to the first target space through the first passage, and the water storage structure in the first target space is continuously accumulated to form the underground water storage space, so that the water storage structure in the deep stratum below the target mining area can be fully utilized, and the land space can be saved.
Based on the content of each embodiment, a first passage is constructed between the location of the purified mine water and the first target space, so that the underground water storage space is formed after the purified mine water is reinjected to the first target space through the first passage, and the method specifically comprises the following steps: constructing a second passage in the first target space based on the water guiding structure in the first target space in a case where the first target space includes the water guiding structure; wherein the first passage communicates with the second passage.
Specifically, the upper end of the first passage is connected with the location of the purified mine water, and the lower end of the first passage is located in a junction area between the first target space and the location of the purified mine water.
According to the direction, the water guide performance and the construction difficulty of each water guide structure in the first target space, part or all of the water guide structures are communicated, and a second passage penetrating through the first target space from top to bottom can be constructed. The upper end of the second passage is located in a junction area between the first target space and the place where the purified mine water is located, and the lower end of the second passage is connected with the second target space. The lower end of any first passage is communicated with the upper ends of any plurality of second passages, so that the location of the purified mine water can be communicated with the second target space.
It should be noted that there may be several second paths in the first target space.
It is noted that the second target space is a formation below the first target space. The second target space may have water storage properties, and may accumulate a certain amount of purified mine water. The second target space can also have water storage performance and water permeability, a certain amount of purified mine water can be stored, and the purified mine water can supplement deeper underground water through the second target space. The second target space may be determined from a result of geological analysis of the target mine.
It should be noted that the second path may be constructed after the first path is constructed. It is also possible to construct the first and second vias simultaneously.
And reinjecting the purified mine water to the first target space through the first passage so as to enable the purified mine water to flow back to the second target space through the second passage to form an underground water storage space.
Specifically, the purified mine water can be injected from the upper end of the first passage, and the purified mine water can flow into the second target space through the first passage and the second passage communicated with the first passage under the action of gravity.
Because the second target space has water storage performance or water storage performance and water permeability, a certain amount of purified mine water can be stored in the second target space to form an underground water storage space.
According to the embodiment of the invention, the purified mine water is reinjected to the first target space and the second target space through the first passage and the second passage communicated with the first passage in the first target space to form the underground water storage space, the purified mine water can be guided into the second target space for accumulation by utilizing the water guide structure in the first target space, deeper underground water can be supplemented, the risk of water permeation of an operation layer in subsequent production of a target mining area can be reduced, the underground water can be supplemented, the problems of ground settlement, ground cracks and the like caused by reduction of underground water reserves can be solved, and the ecological water environment can be protected.
Based on the content of each embodiment, a first passage is constructed between the location of the purified mine water and the first target space, so that the underground water storage space is formed after the purified mine water is reinjected to the first target space through the first passage, and the method specifically comprises the following steps: under the condition that the first target space comprises a water guide structure and the permeability of the first target space is greater than a permeability threshold value, constructing a second passage between the first target space and a second target space below the first target space based on the water guide structure in the first target space; the first passage communicates with the second passage.
Specifically, the first target space has a water guiding structure and has good permeability, so that the first target space can accumulate more water and can permeate water from top to bottom more quickly. For example: the first target space may be a relatively permeable sandstone.
The upper end of the first passage is connected with the place where the purified mine water is located, and the lower end of the first passage is located in a junction area between the first target space and the place where the purified mine water is located.
According to the direction, the water guide performance and the construction difficulty of each water guide structure in the first target space, part or all of the water guide structures are communicated, and a second passage penetrating through the first target space from top to bottom can be constructed. The upper end of the second passage is located in a junction area between the first target space and the place where the purified mine water is located, and the lower end of the second passage is connected with the second target space. The lower end of any first passage is communicated with the upper ends of any plurality of second passages, so that the location of the purified mine water can be communicated with the second target space.
It should be noted that there may be several second paths in the first target space.
It is noted that the second target space is a formation below the first target space. The second target space may have water storage properties, and may accumulate a certain amount of purified mine water. The second target space can also have water storage performance and water permeability, a certain amount of purified mine water can be stored, and the purified mine water can supplement deeper underground water through the second target space. The second target space may be determined from a result of geological analysis of the target mine.
It should be noted that the second path may be constructed after the first path is constructed. It is also possible to construct the first and second vias simultaneously.
And injecting the purified mine water back to the first target space through the first passage so that the purified mine water permeates and flows back to the second target space through the second passage to form an underground water storage space.
Specifically, the purified mine water can be injected from the upper end of the first passage, and the purified mine water can flow into the second target space along the first passage and the second passage connected with the first passage under the action of gravity.
Because the first target space has better permeability, the purified mine water can also permeate into the second target space.
A large amount of purified mine water can be accumulated in the first target space and the second target space below the first target space, and an underground water storage space is formed.
In the case where the first target space does not include the water guiding structure but the permeability is greater than the permeability threshold value, the permeability of the first target space is good. Through the first passage, after the purified mine water is reinjected to the first target space, the purified mine water can permeate into the second target space, and in the permeating process, a part of the purified mine water is stored in the first target space.
It should be noted that the water permeability when the first target space does not include the water guide structure but the permeability is greater than the permeability threshold is smaller than the water permeability when the first target space includes the water guide structure but the permeability is not greater than the permeability threshold; the water permeability of the first target space when the first target space includes the water-conducting configuration but the permeability is not greater than the permeability threshold is less than the water permeability of the first target space when the first target space includes the water-conducting configuration and the permeability is greater than the permeability threshold.
According to the embodiment of the invention, the purified mine water is reinjected to the first target space and the second target space through the osmosis of the first target space, the first passage and the second passage communicated with the first passage in the first target space to form the underground water storage space, so that more purified mine water can be accumulated in the first target space and the second target space, deeper underground water can be supplemented, and more water can be supplemented to the underground water.
Based on the content of each embodiment, a first passage is constructed between the location of the mine water after purification and a first target space, and the method specifically comprises the following steps: and communicating the location of the purified mine water with a first target space through drilling to construct a first passage.
Drilling, namely, a drilling machine constructs a drill hole according to a certain design angle and direction. Drilling rigs typically employ mechanical methods to break rock for drilling. The drilling mode can comprise the following steps: percussion drilling, rotary drilling, percussion rotary drilling, vibratory drilling, jet drilling, and the like.
In the embodiment of the invention, the drilling machine can start from the location of the purified mine water, and drill holes are constructed according to the preset design angle and direction, so that the drill holes can communicate the location of the purified mine water with the first target space. The borehole between the location of the purified mine water and the first target space may be referred to as a first passage.
It should be noted that the drilling mode of the drilling machine, and the preset design angle and direction during drilling of the drilling machine in the embodiment of the invention can be determined according to actual conditions. The specific drilling method of the drilling machine, and the specific values of the preset design angle and direction when the drilling machine drills are not particularly limited in the embodiments of the present invention.
According to the embodiment of the invention, the first passage for communicating the location of the purified mine water with the first target space is constructed through drilling, the first passage can be constructed through a conventional method, and the method for constructing the first passage is simple and easy to operate.
Based on the content of the foregoing embodiments, based on the water guiding structure in the first target space, a second passage is constructed between the first target space and a second target space below the first target space, specifically including: and communicating the plurality of water guide structures in the first target space through a horizontal directional drilling machine, constructing a second passage which penetrates through the first target space from top to bottom, and communicating the second passage with the first passage.
A horizontal directional drilling machine is a machine which can perform drilling and other operations under the ground surface without digging the ground surface.
In the embodiment of the invention, the flow direction of the purified mine water after the purified mine water is reinjected to the first target space can be analyzed according to the geological analysis result of the target mining area, and the confluence direction of the purified mine water is determined.
According to the confluence direction and the construction difficulty of the purified mine water, the regions which obstruct the flow of the purified mine water between the target water guide structures in the confluence direction of the purified mine water can be communicated by using a horizontal directional drilling machine, so that the purified mine water can flow into the second target space along the plurality of water guide structures in the first target space and the communicated regions.
It should be noted that the lower end of any one first passage and the upper ends of the plurality of second passages can be communicated through the horizontal directional drilling machine, so that the purified mine water can flow into a second target space from the location of the purified mine water through the first passage and the second passage.
It should be noted that, by using the horizontal directional drilling machine, a part or all of the water guide structure forming the second passage can be enlarged, so that the purified mine water can flow into the second target space through the second passage more quickly.
According to the embodiment of the invention, the area which is between any two water guide structures in the first target space and obstructs the flow of the purified mine water is opened through the horizontal directional drilling machine, the second passage which penetrates through the first target space is constructed and is communicated with the first passage and the second passage, so that the purified mine water can flow into the second target space from the place where the purified mine water is located through the first passage and the second passage, the second passage can be constructed through a conventional method, and the method for constructing the second passage is simple and easy to operate.
Based on the content of the foregoing embodiments, determining the first target space according to the geological analysis result of the target mine area specifically includes: and determining one or more alternative first target spaces according to the geological analysis result of the region where the target mining area is located.
Specifically, according to the geological analysis result of the area where the target mining area is located, a space with a water storage structure, a water guide structure or a water guide structure and a better permeability below the target mining area can be determined to be used as the alternative first target space.
And determining part or all of the alternative first target spaces as the first target spaces based on the geological features of the alternative first target spaces.
Wherein the geological features comprise: at least one of orientation, volume, permeability, and pore fracture development characteristics.
Specifically, a plurality of candidate first target spaces whose orientation, capacity, permeability, or pore fracture development characteristics meet actual requirements may be selected as the first target space. For example: the alternative first target spaces can be sequenced according to the position of the alternative first target spaces, and a plurality of alternative first target spaces which are close to the location of the purified mine water are selected as the first target spaces. And selecting a plurality of alternative first target spaces which meet the actual requirements in the aspects of the orientation, the volume, the permeability and the pore fracture development characteristics of each alternative first target space as the first target spaces. For example: the alternative first target spaces can be sequenced according to the position of each alternative first target space, the permeability and the pore fracture development characteristics of each alternative first target space, and a plurality of alternative first target spaces which are close to the place where the purified mine water is located and have good permeability and pore fracture development are selected as the first target spaces.
According to the embodiment of the invention, the plurality of candidate first target spaces are determined to be the first target spaces based on the geological characteristics of the candidate first target spaces, and the underground water storage space which meets the actual requirements better can be constructed by selecting the more suitable first target space.
Based on the content of the foregoing embodiments, before determining the first target space according to the result of geological analysis of the target mine area, the method further includes: and carrying out geological analysis on the target mining area to obtain a geological analysis result of the target mining area.
Specifically, geological exploration is carried out on the target mine area, and geological analysis is carried out on the target mine area by combining existing exploration data such as hydrogeological survey results and the like of the target mine area, so that a geological analysis result of the target mine area is obtained.
Performing geological analysis on the target mine area may include: the method comprises the following steps of analyzing the distribution of the stratum of the target mining area, analyzing the distribution of underground water of the target mining area, analyzing a supply channel of the underground water of the target mining area, analyzing the water conductivity of the target mining area and the like.
According to the embodiment of the invention, the geological analysis result of the target mining area is obtained by performing geological analysis on the target mining area, the geological structure of the target mining area can be more accurately known based on the obtained geological analysis result of the target mining area, the first target space and the second target space can be more accurately determined, and the shortest path between the location of the purified mine water and the first target space and the second target space can be selected by more accurately knowing the geological structures of the first target space and the second target space, so that the cost investment in constructing the first passage and the second passage can be reduced.
Based on the content of each embodiment, reinjection the mine water after purification to the first target space, before forming the underground water storage space, still include: and collecting mine water in the target mining area.
In particular, mine water in a target mine area can be collected through the water collecting device.
And (3) purifying the mine water to obtain the purified mine water.
After the mine water in the target mining area is collected, the mine water can be purified according to the water quality type of the mine water. For example: for general mine water, a precipitation method can be adopted for purification; for mine water with high mineralization, an electrodialysis method can be adopted for purification; for acid mine water, a neutralization method can be adopted for purification.
After the mine water is purified, the purified mine water with the water quality higher than or equal to the water quality of underground water in a target mining area can be obtained.
According to the embodiment of the invention, the collected mine water is purified to obtain the purified mine water, and after the purified mine water is reinjected to the first target space and the second target space, the underground water of the target mining area can be prevented from being polluted, and the ecological water environment can be protected.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for constructing an underground water storage space in a secondary stratum is characterized by comprising the following steps:
determining a first target space according to a geological analysis result of a target mining area;
constructing a first passage between the location of the purified mine water and the first target space, so that the purified mine water is reinjected to the first target space through the first passage to form an underground water storage space;
wherein the first target space is located in a medium-generation stratum; the first target space has water-retaining and/or water-permeable properties; the first target space has water permeability, which means that the first target space comprises a water guide structure and/or the permeability of the first target space is greater than a permeability threshold; the water-conducting structure comprises pores or fissures.
2. The method of constructing an underground water storage space from a secondary stratum of claim 1, wherein the first target space is located in a stratum below 1000 meters.
3. The method for constructing an underground water storage space in a secondary stratum according to claim 1, wherein a first passage is constructed between the location of the purified mine water and the first target space, so that the purified mine water is reinjected to the first target space through the first passage to form the underground water storage space, and specifically comprises the following steps:
and under the condition that the first target space has water storage performance, the purified mine water is reinjected to the first target space through the first passage to form an underground water storage space.
4. The method for constructing an underground water storage space in a secondary stratum according to claim 1, wherein a first passage is constructed between the location of the purified mine water and the first target space, so that the purified mine water is reinjected to the first target space through the first passage to form the underground water storage space, and specifically comprises the following steps:
constructing a second passage between the first target space and a second target space below the first target space based on the water guiding configuration in the first target space in a case where the first target space includes the water guiding configuration;
reinjecting the purified mine water to the first target space through the first passage, so that the purified mine water flows back to the second target space through the second passage to form an underground water storage space;
wherein the first passage is in communication with the second passage.
5. The method for constructing an underground water storage space in a secondary stratum according to claim 1, wherein a first passage is constructed between the location of the purified mine water and the first target space, so that the purified mine water is reinjected to the first target space through the first passage to form the underground water storage space, and specifically comprises the following steps:
constructing a second passage between the first target space and a second target space below the first target space based on the water guiding structure in the first target space if the first target space includes a water guiding structure and the permeability of the first target space is greater than a permeability threshold;
reinjecting the purified mine water to the first target space through the first passage so that the purified mine water permeates and flows back to the second target space through the second passage to form an underground water storage space;
wherein the first passage is in communication with the second passage.
6. The method for constructing the underground water storage space in the secondary stratum according to any one of claims 3 to 5, wherein a first passage is constructed between the location of the purified mine water and the first target space, and specifically comprises:
and communicating the location of the purified mine water with the first target space through drilling to construct the first passage.
7. The method for constructing an underground water storage space according to the secondary stratum of claim 4 or 5, wherein the constructing a second passage between the first target space and a second target space below the first target space based on the water guiding structure in the first target space comprises:
and communicating a plurality of water guide structures in the first target space through a horizontal directional drilling machine, constructing a second passage penetrating through the first target space from top to bottom, and communicating the second passage and the first passage.
8. The method for constructing an underground water storage space according to the secondary stratum of any one of claims 1 to 5, wherein the determining the first target space according to the geological analysis result of the target mining area specifically comprises:
determining one or more alternative first target spaces according to the geological analysis result of the target mining area;
determining part or all of the alternative first target spaces as the first target spaces based on geological features of the alternative first target spaces;
wherein the geological feature comprises: at least one of orientation, volume, permeability, and pore fracture development characteristics.
9. The method for constructing an underground water storage space according to the secondary stratum of any one of claims 1 to 5, wherein before determining the first target space according to the geological analysis result of the target mining area, the method further comprises:
and carrying out geological analysis on the target mining area to obtain a geological analysis result of the target mining area.
10. The method for constructing an underground water storage space in the secondary stratum according to any one of claims 1 to 5, wherein before the purified mine water is reinjected into the first target space to form the underground water storage space, the method further comprises:
collecting mine water in the target mining area;
and purifying the mine water to obtain the purified mine water.
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