Pumped storage power station for abandoned mine in high-phreatic-water-level mining area

Abstract

The utility model provides a high-phreatic-water-level mining area abandoned mine pumped storage power station. The high-phreatic-water-level mining area abandoned mine pumped storage power station comprises a coal mining subsidence ponding area, a water quality purification station, an upper reservoir body, a standby reservoir, an input pipeline, an output pipeline and a lower reservoir body. A coal mining subsidence ponding area is transferred through a water quality purification station and then flows into an upper reservoir body or a standby reservoir, the upper reservoir body is provided with an input pipeline and an output pipeline in a communicating mode, the free ends of the input pipeline and the output pipeline are arranged in a lower reservoir body in a communicating mode, and the input pipeline can introduce a water source in the upper reservoir body into the lower reservoir body for power generation. And the water source in the lower reservoir body can be introduced into the upper reservoir body by the output pipeline. Through the arrangement of the scheme, water of a water source in a coal mining subsidence water accumulation area can be purified and then introduced into the lower reservoir body for power generation, and waste mines in a high-water-water-level mining area are recycled.

Description

Technical Field

[0001] This utility model relates to the field of mine resource reuse technology, specifically a pumped storage power station for abandoned mines in high water table mining areas. Background Technology

[0002] With the increase in coal mining intensity and the continued advancement of national energy transformation and capacity reduction policies, many coal mines have been shut down due to safety issues or resource depletion, resulting in the waste of underground space resources in many abandoned mines. According to the Chinese Academy of Engineering, by 2030, the number of abandoned mines closed in China will reach 15,000, with approximately 1.56 million cubic meters of usable underground space resources. 3 After large-scale and intensive mining, high-water-level mining areas in my country have created a large number of subsidence and water accumulation areas on the surface, resulting in a reduction of land resources and restricting industrial and agricultural development. Therefore, in order to increase land use space resources, the issue of reusing underground space resources in abandoned mines has attracted great attention from the government and enterprises. Utility Model Content

[0003] The technical problem to be solved by this utility model is how to reuse abandoned mine shafts in mining areas with high water levels.

[0004] This utility model solves the above-mentioned technical problems through the following technical means:

[0005] A pumped-storage power station for abandoned mines in high-water-level mining areas includes a coal mining subsidence water accumulation area (1), a water purification station (2), an upper reservoir (3), a backup reservoir (4), an input pipe (5), an output pipe (6), and a lower reservoir. The coal mining subsidence water accumulation area (1) flows into the upper reservoir (3) or the backup reservoir (4) after being transferred through the water purification station (2). The upper reservoir (3) is connected to the input pipe (5) and the output pipe (6). The free ends of the input pipe (5) and the output pipe (6) are connected to the lower reservoir. The input pipe (5) can introduce water from the upper reservoir (3) into the lower reservoir for power generation. The output pipe (6) can introduce water from the lower reservoir into the upper reservoir (3).

[0006] Beneficial effects: Through the coordinated operation of the coal mining subsidence water accumulation area, water purification station, upper reservoir, backup reservoir, input pipeline, output pipeline, and lower reservoir, the water source in the coal mining subsidence water accumulation area can be purified and introduced into the lower reservoir for power generation, preventing water leakage from the lower reservoir and pollution of groundwater, thus realizing the reuse of abandoned mine shafts in high groundwater level mining areas.

[0007] Furthermore, the water purification station (2) includes a purification water supply pipeline (21), a main water supply pipeline (22), and a secondary water supply pipeline (23). The input end of the purification water supply pipeline (21) is connected to the coal mining subsidence water accumulation area (1). The output end of the purification water supply pipeline (21) is connected to the main water supply pipeline (22) and the secondary water supply pipeline (23) respectively. The output end of the main water supply pipeline (22) is connected to the upper reservoir body (3). The output end of the secondary water supply pipeline (23) is connected to the backup reservoir (4).

[0008] Furthermore, a first valve is fixed on the main water supply pipeline (22).

[0009] Beneficial effect: By setting the first valve, when the water source in the upper reservoir is low, the first valve is opened, and the purified water source in the coal mining subsidence water accumulation area flows into the upper reservoir through the main water transmission pipeline.

[0010] Furthermore, a second valve is fixed to the water supply pipe (23).

[0011] Beneficial effect: By setting up the second valve, when there is a large amount of water in the upper reservoir, the second valve is opened, and the purified water in the coal mining subsidence water accumulation area flows into the backup reservoir through the water transmission pipeline for storage.

[0012] Furthermore, a main connection pipeline (31) and a backup connection pipeline (32) are provided between the upper reservoir (3) and the backup reservoir (4).

[0013] Furthermore, a third valve is fixed on the main and backup connecting pipe (31).

[0014] Beneficial effect: By setting up the third valve, when there is a large amount of water in the upper reservoir, the third valve is opened, and the water in the upper reservoir flows into the backup reservoir through the main and backup connection pipeline.

[0015] Furthermore, a fourth valve is fixed on the backup main connecting pipe (32).

[0016] Beneficial effect: By setting the fourth valve, when the water source in the upper reservoir is low, the fourth valve is opened, and the water source in the backup reservoir flows into the upper reservoir through the backup main connection pipeline.

[0017] Furthermore, the output pipe (6) is provided in two parts.

[0018] Furthermore, the input pipe (5) includes a pressure pipe (51) and a first connecting pipe (52). The input end of the pressure pipe (51) is connected to the first connecting pipe (52), the free end of the first connecting pipe (52) is connected to the upper reservoir body (3), and the output end of the pressure pipe (51) is connected to the lower reservoir body.

[0019] Beneficial effects: By setting up pressure pipelines and the first connecting pipeline, water from the upper reservoir can be introduced into the lower reservoir for power generation.

[0020] Furthermore, the output pipe (6) includes a pumping pipe (61) and a second connecting pipe (62). The output end of the pumping pipe (61) is connected to the second connecting pipe (62), the free end of the second connecting pipe (62) is connected to the upper reservoir body (3), and the input end of the pumping pipe (61) is connected to the lower reservoir body.

[0021] Beneficial effects: By installing the pumping pipe and the second connecting pipe, water from the lower reservoir can be pumped into the upper reservoir. Attached Figure Description

[0022] Figure 1 This is a perspective view of the pumped-storage power station in an abandoned mine in a high-water-level mining area, as described in this utility model embodiment.

[0023] Figure 2 This is a top view of the pumped-storage power station in an abandoned mine in a high-water-level mining area, as described in this utility model embodiment. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Example 1

[0026] like Figure 1 As shown in the figure, this embodiment provides a pumped storage power station for abandoned mines in high water level mining areas, including a coal mining subsidence water accumulation area 1, a water purification station 2, an upper reservoir 3, a backup reservoir 4, an input pipeline 5, an output pipeline 6, and a lower reservoir (not shown in the figure).

[0027] like Figure 1 , Figure 2As shown, the water purification station 2 includes a purification water transmission pipeline 21, a main water transmission pipeline 22, and a secondary water transmission pipeline 23. The input end of the purification water transmission pipeline 21 is connected to the coal mining subsidence water accumulation area 1, allowing the poor-quality water in the coal mining subsidence water accumulation area 1 to be purified into better-quality water through the purification water transmission pipeline 21. The output end of the purification water transmission pipeline 21 is connected to both the main water transmission pipeline 22 and the secondary water transmission pipeline 23. The output end of the main water transmission pipeline 22 is connected to the upper reservoir 3, and the secondary water transmission pipeline 23... The output end is connected to the backup reservoir 4. The main water supply pipeline 22 and the secondary water supply pipeline 23 are respectively fixed with a first valve (not shown) and a second valve (not shown). When the water source in the upper reservoir 3 is low, the first valve is opened, and the purified water source in the coal mining subsidence water accumulation area 1 flows into the upper reservoir 3 through the main water supply pipeline 22. When the water source in the upper reservoir 3 is high, the second valve is opened, and the purified water source in the coal mining subsidence water accumulation area 1 flows into the backup reservoir 4 for storage through the secondary water supply pipeline 23.

[0028] like Figure 1 , Figure 2 As shown, a main-to-back connection pipe 31 and a backup-to-main connection pipe 32 are installed between the upper reservoir body 3 and the backup reservoir 4. A third valve (not shown) and a fourth valve (not shown) are fixed on the main-to-back connection pipe 31 and the backup-to-main connection pipe 32, respectively. When the water source in the upper reservoir body 3 is low, the fourth valve is opened, and the water source in the backup reservoir 4 flows into the upper reservoir body 3 through the backup-to-main connection pipe 32. When the water source in the upper reservoir body 3 is high, the third valve is opened, and the water source in the upper reservoir body 3 flows into the backup reservoir 4 through the main-to-back connection pipe 31.

[0029] like Figure 1 , Figure 2 As shown, the upper reservoir 3 is connected to an input pipe 5 and an output pipe 6. The other ends of the input pipe 5 and the output pipe 6 are connected to the lower reservoir. Water from the upper reservoir 3 enters the lower reservoir through the input pipe 5 for power generation. The output pipe 6 can pump water from the lower reservoir into the upper reservoir 3. In this embodiment, there are two output pipes 6. The input pipe 5 includes a pressure pipe 51 and a first connecting pipe 52. The input end of the pressure pipe 51 is connected to the first connecting pipe 52, and the free end of the first connecting pipe 52 is connected to the upper reservoir 3. The output end of the pressure pipe 51 is connected to the lower reservoir. The output pipe 6 includes a pumping pipe 61 and a second connecting pipe 62. The output end of the pumping pipe 61 is connected to the second connecting pipe 62, and the free end of the second connecting pipe 62 is connected to the upper reservoir 3. The input end of the pumping pipe 61 is connected to the lower reservoir.

[0030] In use, the poor-quality water source in the coal mining subsidence water accumulation area 1 can be purified into a better-quality water source through the purification water transmission pipeline 21. When the water source in the upper reservoir 3 is low, the first valve is opened, and the purified water source in the coal mining subsidence water accumulation area 1 flows into the upper reservoir 3 through the main water transmission pipeline 22. When the water source in the upper reservoir 3 is high, the second valve is opened, and the purified water source in the coal mining subsidence water accumulation area 1 flows into the backup reservoir 4 for storage through the water transmission pipeline 23. The water sources in the upper reservoir 3 and the backup reservoir 4 can also circulate with each other. The water source in the upper reservoir 3 can enter the lower reservoir through the input pipeline 5 for power generation, and the output pipeline 6 can pump the water source in the lower reservoir to the upper reservoir 3.

[0031] Example 2

[0032] A method for constructing a pumped-storage power station in an abandoned mine in a high-water-level mining area includes the following steps:

[0033] Step 1: Define the construction scope of the proposed upper reservoir of the pumped storage power station in the abandoned mine, including the proposed upper reservoir body 3, the proposed backup reservoir 4, the proposed water purification station 2, the proposed input pipeline 5, the proposed output pipeline 6, the proposed main and backup connecting pipeline 31, and the proposed backup and main connecting pipeline 32.

[0034] Step 2: Conduct a foundation stability assessment of the proposed upper reservoir body 3, backup reservoir 4, and water purification station 2 area;

[0035] Step 3: The coal mining subsidence and water accumulation area involved in the proposed abandoned mine pumped storage power station will be leveled and enclosed in sections: the upper reservoir body 3, the backup reservoir 4, and the water purification station 2.

[0036] Step 4: Dredge and harden the dam body of the proposed upper reservoir 3 and the backup reservoir 4;

[0037] Step 5: Construct the main and backup connecting pipeline 31, the backup main connecting pipeline 32, the input pipeline 5, and the output pipeline 6;

[0038] Step 6: Construct water purification station 2, and construct purified water transmission pipeline 21, main water transmission pipeline 22, and secondary water transmission pipeline 23;

[0039] Step 7: Perform seepage prevention treatment on the upper reservoir body 3 and the backup reservoir 4.

[0040] Furthermore, step 1 includes the following steps:

[0041] Step 1.1: The construction of the upper reservoir body 3, the proposed backup reservoir 4, and the water purification station 2 are all constructed using the existing coal mining subsidence water accumulation area in the high water table mining area;

[0042] Step 1.2: The construction scope needs to be determined based on the current situation of the specific coal mining subsidence and water accumulation area and the construction design plan.

[0043] Furthermore, step 2 includes the following steps:

[0044] Step 2.1, data collection for foundation stability assessment, which includes historical records of coal seam mining in the mining area, distribution maps of coal seam thickness in the mining area, distribution maps of mining working faces in the mining area, geological and mining data of the mining area, and the subsidence range of the coal mining subsidence area.

[0045] Step 2.2, the foundation stability evaluation method is that when the settlement value of the surface point does not exceed 30mm for 6 consecutive months, the surface movement period is considered to be over, the surface has reached the point of stability, and the foundation has been stabilized. The settlement value of the surface point is monitored using a total station, level or RTK surveying instrument.

[0046] Step 2.3, the foundation stability evaluation method also includes: if the apparent resistivity values ​​obtained by the transient electromagnetic method are distributed in the plane without difference, then the underground goaf area is determined to be stable and the foundation is stable.

[0047] Furthermore, step 3 includes the following steps:

[0048] Step 3.1: Based on the scope of the coal mining subsidence water accumulation area, the topography, and the reservoir capacity of the proposed abandoned mine pumped storage power station, the proposed upper reservoir body 3, the backup reservoir 4, and the water purification station 2 areas are divided in the coal mining subsidence water accumulation area.

[0049] Step 3.2, based on the scope and topography of the coal mining subsidence water accumulation area, in order to place the proposed upper reservoir body 3 as close as possible to the proposed input pipeline 5 and the proposed output pipeline 6;

[0050] Step 3.3: Based on the capacity of the lower reservoir of the proposed abandoned mine pumped storage power station, the capacity of the upper reservoir should be determined as far as possible within the space of the lower reservoir. The capacity of the upper reservoir should be at least 1.2 times the capacity of the lower reservoir of the proposed abandoned mine pumped storage power station to ensure the water volume of the lower reservoir.

[0051] Step 3.4: Carry out the enclosure construction work to construct the upper reservoir dam body 3, the backup reservoir dam body 4, and the water purification station platform 2;

[0052] Step 3.5: The height of the dam and platform during the construction of the enclosure should be 1.5 to 2.0 meters higher than the maximum water level in the area where the proposed abandoned mine pumped storage power station is located, in order to reduce the risk of dam overflow.

[0053] Step 3.6: Leveling work is carried out to make the upper reservoir dam body 3, the backup reservoir dam body 4, and the water purification station platform 2 usable.

[0054] Furthermore, step 4 includes the following steps:

[0055] Step 4.1, the upper reservoir 3 and the backup reservoir 4 are drained by using water pumps to discharge the water in the reservoirs into the surrounding coal mining subsidence water accumulation area;

[0056] Step 4.2, the water discharge is to completely drain the upper reservoir 3 and the backup reservoir 4, exposing the bottom mud; all of it is pumped to the surrounding coal mining subsidence water accumulation area;

[0057] Step 4.3 involves dredging the upper reservoir 3 and the backup reservoir 4, which includes, but is not limited to, using excavators to transfer bottom sediment and sludge suction machines to transfer bottom sediment.

[0058] Step 4.4 involves hardening the dam body of the upper reservoir 3 and the backup reservoir 4, which includes, but is not limited to, hardening by compaction using various heavy objects.

[0059] Furthermore, step 5 includes the following steps:

[0060] Step 5.1, Constructing the input pipeline 5, involves constructing the first connecting pipeline 52 deep within the upper reservoir 3 and extending it to the pressure pipeline 51. Its relative elevation should be higher than the entrance of the upper reservoir 3 and lower than the exit of the pressure pipeline 51, so as to facilitate the flow of water from the upper reservoir 3 into the pressure pipeline 51.

[0061] Step 5.2, constructing the output pipe 6, involves constructing a second connecting pipe 62 starting from the top of the pumping pipe and extending it to the edge of the upper reservoir 3. Its relative elevation should be higher than the drain outlet of the pumping pipe 61 and lower than the outlet at the edge of the upper reservoir 3, so as to facilitate the flow of water from the pumping pipe 61 into the upper reservoir 3.

[0062] Step 5.3, construct the main and backup connecting pipeline 31, which involves constructing a drainage outlet at the top of the upper reservoir 3 that extends to the edge of the backup reservoir 4, so that the water source in the upper reservoir 3, due to its large volume, can flow to the top edge of the backup reservoir 4.

[0063] Step 5.4, Constructing the backup main connecting pipeline 32 involves constructing the connecting pipeline inlet at the bottom of the backup reservoir 4 and the connecting pipeline outlet at the edge of the upper reservoir 3, so as to facilitate the flow of water from the backup reservoir 4 into the upper reservoir 3.

[0064] Step 5.5: Construct the above-mentioned pipelines, and evenly distribute relevant valves to control the opening or closing of the pipelines;

[0065] Step 5.6, the relevant valves can control the water flow rate;

[0066] Step 5.7, connecting pipelines include, but are not limited to, channels connecting water bodies such as steel pipes, PVC pipes, and ditches built with bricks.

[0067] Step 5.8: All connecting pipelines are unidirectional flow pipelines.

[0068] Furthermore, step 6 includes the following steps:

[0069] Step 6.1, constructing water purification station 2 is to purify the water in the coal mining subsidence water accumulation area, and then let the purified water flow into the upper reservoir or the upper reservoir backup reservoir.

[0070] Step 6.2, constructing purification water transmission pipeline 21, main water transmission pipeline 22, and secondary water transmission pipeline 23, is to better connect the upper reservoir body 3, the backup reservoir 4, and the coal mining subsidence water accumulation area 1;

[0071] Step 6.3: Construct the above-mentioned pipelines, and evenly distribute relevant valves to control the opening or closing of the pipelines;

[0072] Step 6.4, the relevant valves can control the water flow rate;

[0073] Step 6.5, connecting pipelines include, but are not limited to, channels connecting water bodies using pipes such as steel pipes and PVC pipes;

[0074] Step 6.6: All connecting pipelines are unidirectional flow pipelines.

[0075] Furthermore, step 7 includes the following steps:

[0076] Step 7.1, water-proofing methods include, but are not limited to, using concrete mortar, asphalt physical waterproofing, applying waterproof coatings, and laying ground membranes for waterproofing.

[0077] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pumped-storage power station for abandoned mine shafts in high-water-level mining areas, characterized in that, It includes a coal mining subsidence water accumulation area (1), a water purification station (2), an upper reservoir (3), a backup reservoir (4), an input pipeline (5), an output pipeline (6), and a lower reservoir; The water accumulation area (1) in the coal mining subsidence area flows into the upper reservoir (3) or the backup reservoir (4) after being transferred through the water purification station (2). The upper reservoir (3) is connected to an input pipe (5) and an output pipe (6). The free ends of the input pipe (5) and the output pipe (6) are connected to the lower reservoir. The input pipe (5) can introduce the water source in the upper reservoir (3) into the lower reservoir for power generation. The output pipe (6) can introduce the water source in the lower reservoir into the upper reservoir (3).

2. A pumped-storage power station for abandoned mine shafts in high-water-level mining areas according to claim 1, characterized in that: The water purification station (2) includes a purification water supply pipeline (21), a main water supply pipeline (22), and a secondary water supply pipeline (23). The input end of the purification water supply pipeline (21) is connected to the coal mining subsidence water accumulation area (1). The output end of the purification water supply pipeline (21) is connected to the main water supply pipeline (22) and the secondary water supply pipeline (23) respectively. The output end of the main water supply pipeline (22) is connected to the upper reservoir body (3). The output end of the secondary water supply pipeline (23) is connected to the backup reservoir (4).

3. A pumped-storage power station for abandoned mine shafts in high-water-level mining areas according to claim 2, characterized in that: The main water supply pipeline (22) is fixed with a first valve.

4. A pumped-storage power station for abandoned mine shafts in high-water-level mining areas according to claim 2, characterized in that: A second valve is fixed on the water supply pipe (23).

5. A pumped-storage power station for abandoned mine shafts in high-water-level mining areas according to claim 1, characterized in that: The main and backup connecting pipelines (31) and backup connecting pipelines (32) are provided between the upper reservoir (3) and the backup reservoir (4).

6. A pumped-storage power station for abandoned mine shafts in high-water-level mining areas according to claim 5, characterized in that: A third valve is fixed on the main and backup connecting pipe (31).

7. A pumped-storage power station for abandoned mine shafts in high-water-level mining areas according to claim 5, characterized in that: A fourth valve is fixed on the backup main connecting pipe (32).

8. A pumped-storage power station for abandoned mine shafts in high-water-level mining areas according to claim 1, characterized in that: The output pipe (6) is provided in two parts.

9. A pumped-storage power station for abandoned mine shafts in high-water-level mining areas according to claim 1, characterized in that: The input pipe (5) includes a pressure pipe (51) and a first connecting pipe (52). The input end of the pressure pipe (51) is connected to the first connecting pipe (52), and the free end of the first connecting pipe (52) is connected to the upper reservoir body (3). The output end of the pressure pipe (51) is connected to the lower reservoir body.

10. A pumped-storage power station for abandoned mine shafts in high-water-level mining areas according to claim 1, characterized in that: The output pipe (6) includes a pumping pipe (61) and a second connecting pipe (62). The output end of the pumping pipe (61) is connected to the second connecting pipe (62). The free end of the second connecting pipe (62) is connected to the upper reservoir body (3). The input end of the pumping pipe (61) is connected to the lower reservoir body.

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