Underground compressed air energy storage chamber surrounding rock drainage system and method

Abstract

The invention provides an underground compressed air energy storage chamber surrounding rock drainage system and method.The underground compressed air energy storage chamber surrounding rock drainage system comprises an inner drainage structure arranged in a chamber and an outer drainage structure arranged on one side of the chamber, and the inner drainage structure comprises a first drainage pipe and a second drainage pipe which are arranged on the peripheral side of the chamber; a first water collecting cavity and a second water collecting cavity are formed in the lower side of the chamber, the first drainage pipe is communicated with the first water collecting cavity, the first water collecting cavity is communicated with the second water collecting cavity, a filtering structure is arranged between the first water collecting cavity and the second water collecting cavity, and a supporting structure is arranged in the chamber. According to the underground chamber, crack water and underground water can be collected and then drained, so that a good drainage effect can be achieved, permeated water can be drained through the water seepage and drainage layer, a good anti-seepage effect can be achieved, the crack water is prevented from corroding the steel lining sealing layer, and the safety of the chamber is guaranteed; the sliding plate can drive the supporting structure and the cleaning structure to slide.

Description

Technical Field

[0001] The present invention relates to the technical field of underground gas storage for compressed air energy storage, and particularly to an underground compressed air energy storage chamber surrounding rock drainage system and method. Background Technique

[0002] Compressed air energy storage is considered to be one of the most promising new energy storage technologies, and plays important roles in the power system such as peak shaving and valley filling, primary frequency modulation, improving power grid stability, improving power quality, increasing power grid utilization rate, and increasing the utilization rate of renewable energy. Its working principle is to convert the excess electric energy during the low electricity consumption period into the internal energy of high-pressure air sealed in the gas storage through an air compressor, and then release the high-pressure gas during the high electricity consumption period to act together with the internal combustion gas to drive the generator to generate electricity. During the operation of a compressed air power station, first, the air is compressed by a compressor, generally with an operating pressure reaching 10 MPa, and the air temperature rises. Then, the high-pressure gas is discharged to generate electricity using an expander, and at this time the temperature decreases.

[0003] For chambers using underground storage technology, however, due to the huge change in air pressure, a large amount of accumulated water will be generated in the gas storage chamber. Under the action of high internal pressure, the accumulated confined water will damage the structure. At the same time, a large amount of accumulated water will also occupy the cross-section of the chamber, reducing the gas storage and power generation efficiency. For conventional diversion tunnels or traffic tunnels, water pumps are basically installed to pump out the internal water, which affects the operation efficiency of the chamber and is also restricted by the power supply. During the operation of the underground chamber for compressed air energy storage, due to the action of its high internal pressure, the influence of external water on the structure is very small. However, when the gas storage chamber is in a maintenance state, the excessive external water pressure may cause buckling failure of the lining structure, and if the fissure water is not drained in time, it will cause a large external water pressure on the inner lining. If the inner lining is made of metal material, the groundwater gathering on the outer surface of the inner lining will also cause corrosion of the inner lining, thereby affecting the overall safety and stability of the gas storage.

[0004] Therefore, the present invention provides an underground compressed air energy storage chamber surrounding rock drainage system and method. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a surrounding rock drainage system and method for an underground compressed air energy storage chamber, so as to solve the problems put forward in the above-mentioned background technology. By transforming the structure of the chamber, the present invention can collect and discharge fissure water and groundwater, thus achieving a better drainage effect. And the infiltrated water can be discharged through the seepage drainage layer, thus achieving a better anti-seepage effect and preventing the fissure water from corroding the steel lining sealing layer to ensure the safety of the chamber. The support structure and the cleaning structure can be driven by the sliding plate to slide, so as to treat the water in the chamber, prevent the filtering structure from being blocked, and at the same time, the chamber can be supported by the support structure to prevent the steel lining sealing layer from being deformed by the large pressure after deflation. The collected water can be discharged through the drainage well, and the liquid level can be monitored by the liquid level monitoring structure, so as to pump water when the liquid level is too high, thus preventing the water pressure from being too large.

[0006] To achieve the above object, the present invention is realized by the following technical solutions: A surrounding rock drainage system for an underground compressed air energy storage chamber, including an internal drainage structure installed in the chamber and an external drainage structure installed on one side of the chamber. The internal drainage structure includes a first drain pipe and a second drain pipe installed on the periphery of the chamber. A first water collecting chamber and a second water collecting chamber are opened on the lower side of the chamber. The first drain pipe is communicated with the first water collecting chamber, the first water collecting chamber is communicated with the second water collecting chamber, a filtering structure is installed between the first water collecting chamber and the second water collecting chamber, a support structure is installed in the chamber, a sliding plate is slidably matched with the bottom in the chamber, the sliding plate corresponds to the first water collecting chamber, the sliding plate corresponds to the support structure, a cleaning structure is installed in the first water collecting chamber, the cleaning structure corresponds to the sliding plate, the external drainage structure includes a drainage well and a water pump, the water pump corresponds to the drainage well, the drainage well corresponds to the second water collecting chamber, and a liquid level monitoring structure is installed between the drainage well and the second water collecting chamber.

[0007] Further, the chamber includes a chamber surrounding rock, a concrete lining and a steel lining sealing layer. The first drain pipe and the second drain pipe are both located on the periphery of the chamber surrounding rock. A seepage drainage layer is installed between the concrete lining and the steel lining sealing layer, and the seepage drainage layer is communicated with the first water collecting chamber.

[0008] Further, communication cavities are installed on both sides of the first water collecting chamber. A plurality of communication ports are opened between the communication cavity and the first water collecting chamber. The first drain pipe is communicated with the second drain pipe, and both the first drain pipe and the seepage drainage layer are communicated with the communication cavity. The first water collecting chamber is communicated with the communication cavity through the communication ports.

[0009] Further, a protective shell is installed in the communication cavity. A rodless cylinder is fixed in the protective shell. A first sliding groove is opened on one side of the protective shell. A sliding rod is slidably matched in the first sliding groove. The sliding rod is fixedly connected with the sliding plate, and the sliding rod is fixedly connected with the output end of the rodless cylinder.

[0010] Further, the skateboard includes a blocking plate and a water discharge plate. A second chute is formed at the bottom inside the chamber, corresponding to the skateboard. A sealing ring is installed on the peripheral side of the skateboard.

[0011] Further, a maintenance opening is formed inside the water discharge plate, and a maintenance door is installed in the maintenance opening. The support structure includes a plurality of support rods. A plurality of fixing blocks are fixed on the skateboard, and the fixing blocks are fixedly connected to the support rods. The support rods are of an arc structure and are in contact with the inner wall of the chamber. A plurality of inclined rods are fixed inside the support rods.

[0012] Further, a water outlet is formed at the bottom inside the first water collection chamber, and the water outlet communicates with the second water collection chamber. The filtering structure includes a filter plate fixed inside the water outlet. The cleaning structure includes a scraping rod, which is fixedly connected to the skateboard and is in contact with the inner wall of the first water collection chamber.

[0013] Further, a diversion pipe is installed between the second water collection chamber and the drainage well. The diversion pipe is of a structure inclined downward and communicates with the bottom of the second water collection chamber and the drainage well. A first electric valve is installed inside the diversion pipe, and a second electric valve is installed inside the water outlet.

[0014] Further, the liquid level monitoring structure includes a water level sensor installed inside the drainage well. The water level sensor and the first electric valve are on the same horizontal line. A water suction pipe is fixed at the water inlet end of the water pump, and the water suction pipe is located at the bottom inside the drainage well.

[0015] A drainage method for a surrounding rock drainage system of an underground compressed air energy storage chamber includes the following steps: S1. Guide groundwater and fissure water into the first water collection chamber through the first drainage pipe and the second drainage pipe, and guide the water permeating the surrounding rock and concrete lining of the chamber into the first water collection chamber through the seepage drainage layer; S2. Collect the fissure water, groundwater and permeated water through the first water collection chamber, and send them into the second water collection chamber through the water outlet; S3. Guide the water in the second water collection chamber into the drainage well through the diversion pipe until the water level reaches the upper limit, and pump out the water through the water pump; S4. For the chamber after exhaust, start the rodless cylinder to drive the skateboard to slide, drive the support rods to slide and scrape the water on the inner wall of the chamber. The water in the chamber flows into the first water collection chamber through the water discharge plate. Until before intake, slide the skateboard through the rodless cylinder to adjust the positions of the blocking plate and the water discharge plate.

[0016] Advantages of the present invention: A surrounding rock drainage system and method for an underground compressed air energy storage chamber of the present invention includes a chamber; a first drain pipe; a second drain pipe; a first water collection chamber; a second water collection chamber; a seepage drainage layer; a steel lining sealing layer; a chamber; a support structure; a cleaning structure; a slide plate; a support structure; a drainage well; and a liquid level monitoring structure.

[0017] The first drain pipe and the second drain pipe are installed on the peripheral side of the chamber, and the first water collection chamber and the second water collection chamber are opened on the lower side of the chamber, so that fissure water and groundwater can be collected and then discharged, thereby achieving a better drainage effect. Moreover, the seepage drainage layer can be used to discharge the infiltrated water, thus achieving a better anti-seepage effect and preventing the fissure water from corroding the steel lining sealing layer, ensuring the safety of the chamber. A support structure is installed in the chamber, a cleaning structure is installed in the first water collection chamber, and a slide plate is installed at the bottom of the chamber. The slide plate can drive the support structure and the cleaning structure to slide, thereby treating the water in the chamber and preventing the filtering structure from being blocked. At the same time, the chamber can be supported by the support structure to prevent the steel lining sealing layer from being deformed by the large pressure after deflation. A liquid level monitoring structure is installed between the drainage well and the second water collection chamber. The collected water can be discharged through the drainage well, and the liquid level can be monitored by the liquid level monitoring structure, so as to pump water when the liquid level is too high, thereby preventing excessive water pressure. Brief Description of the Drawings

[0018] Figure 1 It is a schematic assembly structure diagram of two chambers and a drainage well in a surrounding rock drainage system and method for an underground compressed air energy storage chamber of the present invention; Figure 2 For Figure 1 The schematic diagram at point A in Figure 3 For Figure 1 The schematic diagram at point B in Figure 4 For Figure 1 The schematic diagram at point C in Figure 5 It is a schematic assembly sectional structure diagram of a chamber, a first water collection chamber, and a second water collection chamber in a surrounding rock drainage system and method for an underground compressed air energy storage chamber of the present invention; Figure 6 For Figure 5 The schematic diagram at point D in Figure 7 It is a schematic assembly sectional structure diagram of a chamber in a surrounding rock drainage system and method for an underground compressed air energy storage chamber of the present invention; Figure 8 It is a schematic assembly structure diagram of a chamber and a slide plate in a surrounding rock drainage system and method for an underground compressed air energy storage chamber of the present invention; Figure 9Schematic diagram of the assembly three-dimensional structure of the chamber, the first drain pipe, and the second drain pipe in a rock mass drainage system for an underground compressed air energy storage chamber and method according to the present invention; Figure 10 Flow chart of a rock mass drainage system for an underground compressed air energy storage chamber and method according to the present invention; In the figure: 1. Chamber; 2. Rock mass of the chamber; 3. Concrete lining; 4. Steel lining sealing layer; 5. Seepage drainage layer; 6. Connecting cavity; 7. First water collecting cavity; 8. Second water collecting cavity; 9. Drain outlet; 10. Diversion pipe; 11. First electric valve; 12. Second electric valve; 13. Filter plate; 14. Connecting port; 15. Protective shell; 16. First sliding groove; 17. Slide bar; 18. Second sliding groove; 19. Slide plate; 20. Plug plate; 21. Drain plate; 22. Inspection door; 23. Fixed block; 24. Support rod; 25. Inclined rod; 26. Drain well; 27. Water pump; 28. Water level sensor; 29. Suction pipe; 30. First drain pipe; 31. Second drain pipe; 32. Rodless cylinder; 33. Scraping rod. Specific embodiments

[0019] In order to make the technical means, creative features, achieved purposes, and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0020] Please refer to Figures 1 to 10 , the present invention provides a technical solution: a rock mass drainage system for an underground compressed air energy storage chamber, including an internal drainage structure installed in the chamber 1 and an external drainage structure installed on one side of the chamber 1. The internal drainage structure includes a first drain pipe 30 and a second drain pipe 31 installed on the periphery of the chamber 1. A first water collecting cavity 7 and a second water collecting cavity 8 are opened on the lower side of the chamber 1. The first drain pipe 30 is communicated with the first water collecting cavity 7, the first water collecting cavity 7 is communicated with the second water collecting cavity 8, a filtering structure is installed between the first water collecting cavity 7 and the second water collecting cavity 8, a support structure is installed in the chamber 1, a slide plate 19 is slidably matched with the bottom in the chamber 1, the slide plate 19 corresponds to the first water collecting cavity 7, the slide plate 19 corresponds to the support structure, a cleaning structure is installed in the first water collecting cavity 7, the cleaning structure corresponds to the slide plate 19, and the external drainage structure includes a drain well 26 and a water pump 27. The water pump 27 corresponds to the drain well 26, the drain well 26 corresponds to the second water collecting cavity 8, and a liquid level monitoring structure is installed between the drain well 26 and the second water collecting cavity 8.

[0021] In this embodiment, the chamber 1 includes a rock mass of the chamber 2, a concrete lining 3, and a steel lining sealing layer 4. The first drain pipe 30 and the second drain pipe 31 are both located on the periphery of the rock mass of the chamber 2. A seepage drainage layer 5 is installed between the concrete lining 3 and the steel lining sealing layer 4, and the seepage drainage layer 5 is communicated with the first water collecting cavity 7.

[0022] Specifically, fissure water and groundwater enter the first drain pipe 30 and the second drain pipe 31, then flow into the first water collecting chamber 7, then into the second water collecting chamber 8, and then are diverted into the drainage well 26 through the diversion pipe 10. Then, the water is pumped out by the water pump 27. For the water that has penetrated, the seepage drainage layer 5 can be used for auxiliary drainage, so that the penetrated water can be discharged into the first water collecting chamber 7, thereby providing a good protection effect on the steel lining sealing layer 4 and preventing the steel lining sealing layer 4 from being corroded.

[0023] On both sides of the first water collecting chamber 7, there are communication chambers 6. A plurality of communication ports 14 are provided between the communication chamber 6 and the first water collecting chamber 7. The first drain pipe 30 is communicated with the second drain pipe 31. Both the first drain pipe 30 and the seepage drainage layer 5 are communicated with the communication chamber 6. The first water collecting chamber 7 is communicated with the communication chamber 6 through the communication port 14.

[0024] Specifically, fissure water flows into the first drain pipe 30 and the second drain pipe 31, then converges into the communication chamber 6, and then flows into the first water collecting chamber 7 through the communication port 14 in the communication chamber 6, and then drainage can be carried out.

[0025] A protective shell 15 is installed in the communication chamber 6. A rodless cylinder 32 is fixed in the protective shell 15. A first sliding groove 16 is provided on one side of the protective shell 15. A sliding rod 17 is slidably fitted in the first sliding groove 16. The sliding rod 17 is fixedly connected to the sliding plate 19. The sliding rod 17 is fixedly connected to the output end of the rodless cylinder 32. The sliding plate 19 includes a blocking plate 20 and a water discharging plate 21. A second sliding groove 18 is provided at the bottom of the chamber 1, and the second sliding groove 18 corresponds to the sliding plate 19. A sealing ring is installed on the peripheral side of the sliding plate 19.

[0026] Specifically, a communication groove is provided at the bottom of the chamber 1, and the communication groove is communicated with the first sliding groove 16 and the first water collecting chamber 7. When storing gas, at this time, the blocking plate 20 is located in the communication groove, and at this time, the chamber 1 is in a completely sealed state. When the energy is released, at this time, the chamber 1 is in a deflation state. Therefore, the rodless cylinder 32 can be started, so that the rodless cylinder 32 drives the sliding plate 19 to slide, so that the blocking plate 20 and the water discharging plate 21 slide in the first sliding groove 16, so that the water discharging plate 21 slides above the communication groove. At this time, the water in the chamber 1 can flow into the first water collecting chamber 7 through the water discharging plate 21, and then flow out through the second water collecting chamber 8 and the diversion pipe 10.

[0027] An inspection port is provided in the water discharging plate 21, and an inspection door 22 is installed in the inspection port 22. The support structure includes a plurality of support rods 24. A plurality of fixing blocks 23 are fixed on the sliding plate 19, and the fixing blocks 23 are fixedly connected to the support rods 24. The support rods 24 are of an arc-shaped structure, and the support rods 24 are in contact with the inner wall of the chamber 1. A plurality of inclined rods 25 are fixed in the support rods 24.

[0028] Specifically, when the skateboard 19 slides, the skateboard 19 can drive the support rod 24 to slide through the fixed block 23 at this time, so that the support rod 24 scrapes off the water on the inner wall of the chamber 1, and the chamber 1 can be supported by the support rod 24. When the steel lining seal layer 4 is under a large pressure, the support rod 24 can play a certain supporting role at this time, and the inclined rod 25 can ensure stability.

[0029] A water outlet 9 is opened at the bottom of the first water collecting chamber 7. The water outlet 9 is communicated with the second water collecting chamber 8. The filtering structure includes a filter plate 13 fixed in the water outlet 9. The cleaning structure includes a scraping rod 33. The scraping rod 33 is fixedly connected with the skateboard 19, and the scraping rod 33 is in contact with the inner wall of the first water collecting chamber 7.

[0030] Specifically, when the skateboard 19 slides, the scraping rod 33 can be driven to slide by the skateboard 19 at this time, so that the inside of the first water collecting chamber 7 can be cleaned to prevent sludge from blocking the filter plate 13, and the inspection door 22 can be opened regularly to collect and process the sludge.

[0031] A diversion pipe 10 is installed between the second water collecting chamber 8 and the drainage well 26. The diversion pipe 10 is of a structure inclined downward. The diversion pipe 10 is communicated with the bottom of the second water collecting chamber 8 and the drainage well 26. A first electric valve 11 is installed in the diversion pipe 10, and a second electric valve 12 is installed in the water outlet 9.

[0032] Specifically, diversion can be carried out through the diversion pipe 10, and the first electric valve 11 and the second electric valve 12 are used to prevent water from flowing back. The second electric valve 12 is opened so that the water in the first water collecting chamber 7 flows into the second water collecting chamber 8, and then the water flowing into the second water collecting chamber 8 flows into the diversion pipe 10. The first electric valve 11 is opened, and the water can flow into the drainage well 26 through the diversion pipe 10.

[0033] The liquid level monitoring structure includes a water level sensor 28 installed in the drainage well 26. The water level sensor 28 is on the same horizontal line as the first electric valve 11. The water inlet end of the water pump 27 is fixed with a water suction pipe 29. The water suction pipe 29 is located at the bottom of the drainage well 26.

[0034] Specifically, when the water level reaches a certain height, the water level can be detected by the water level sensor 28, and then the first electric valve 11 can be closed to prevent water from flowing back. The water pump 27 is started to pump water, so as to lower the groundwater level and prevent the large water pressure from exerting a large pressure on the chamber 1.

[0035] Workflow: Fissure water flows into the first drain pipe 30 and the second drain pipe 31, then converges and enters the communication cavity 6, and then flows into the first water collection cavity 7 through the communication port 14 in the communication cavity 6. For the water that has seeped in, the auxiliary drainage can be carried out through the seepage drainage layer 5, so that the seeped water can be discharged into the first water collection cavity 7. Then, open the first electric valve 11 and the second electric valve 12, so that the water in the first water collection cavity 7 flows into the second water collection cavity 8 through the water outlet 9, and then the water in the second water collection cavity 8 flows into the drainage well 26 through the diversion pipe 10, and the water can be pumped out by the water pump 27.

[0036] For the gas storage chamber 1, at this time, start the rodless cylinder 32, so that the rodless cylinder 32 drives the plug plate 20 to slide, so that the plug plate 20 is located in the communication groove. At this time, the chamber 1 is in a completely sealed state. When the energy is released, at this time, the chamber 1 is in a deflation state. Therefore, the rodless cylinder 32 can be started, so that the rodless cylinder 32 drives the sliding plate 19 to slide, so that the plug plate 20 and the water outlet plate 21 slide in the first chute 16, so that the water outlet plate 21 slides above the communication groove. At this time, the water in the chamber 1 can flow into the first water collection cavity 7 through the water outlet plate 21, and then flow out through the second water collection cavity 8 and the diversion pipe 10; while the sliding plate 19 slides, the sliding plate 19 can drive the support rod 24 to slide through the fixing block 23, so that the support rod 24 scrapes the water on the inner wall of the chamber 1, and the chamber 1 can be supported by the support rod 24. When the steel lining sealing layer 4 is subjected to a large pressure, at this time, the support rod 24 can play a certain supporting effect, and the inclined rod 25 can ensure stability.

[0037] A drainage method for a drainage system of the surrounding rock of an underground compressed air energy storage chamber, comprising the following steps: S1. Guide the groundwater and fissure water into the first water collection cavity through the first drain pipe and the second drain pipe, and guide the water that penetrates the surrounding rock of the chamber and the concrete lining into the first water collection cavity through the seepage drainage layer; S2. Collect the fissure water, groundwater and penetrated water through the first water collection cavity, and send it into the second water collection cavity through the water outlet; S3. Guide the water in the second water collection cavity into the drainage well through the diversion pipe until the water level reaches the upper limit, and pump out the water through the water pump; S4. For the chamber after the exhaust is completed, start the rodless cylinder to drive the sliding plate to slide, drive the support rod to slide to scrape the water on the inner wall of the chamber, and the water in the chamber flows into the first water collection cavity through the water outlet plate. Until before the intake, slide the sliding plate through the rodless cylinder to adjust the positions of the plug plate and the water outlet plate.

[0038] Specifically, drainage is carried out through the first drain pipe and the second drain pipe, and auxiliary drainage is carried out through the seepage drainage layer, so as to protect the steel lining sealing layer 4 and prevent the steel lining sealing layer 4 from being corroded by fissure water due to contact with fissure water.

[0039] Water is collected through the first water collecting chamber and the second water collecting chamber, and then discharged into the drainage well 26. When the water level reaches a certain height, the water pump 27 is started to pump out the water. In addition, the groundwater itself can seep into the drainage well 26. When the water level is too high, it means that there is too much groundwater, and the groundwater can be pumped out, so as to prevent excessive pressure caused by too much groundwater and prevent excessive pressure on the chamber 1.

[0040] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An underground compressed air energy storage chamber surrounding rock drainage system, comprising an internal drainage structure installed in the chamber (1) and an external drainage structure installed on one side of the chamber (1), characterized in that, The internal drainage structure includes a first drain pipe (30) and a second drain pipe (31) installed on the peripheral side of the chamber (1). A first water collecting chamber (7) and a second water collecting chamber (8) are formed on the lower side of the chamber (1). The first drain pipe (30) is communicated with the first water collecting chamber (7), the first water collecting chamber (7) is communicated with the second water collecting chamber (8), a filtering structure is installed between the first water collecting chamber (7) and the second water collecting chamber (8), a supporting structure is installed in the chamber (1), a sliding plate (19) is slidably matched with the bottom in the chamber (1), the sliding plate (19) corresponds to the first water collecting chamber (7), the sliding plate (19) corresponds to the supporting structure, a cleaning structure is installed in the first water collecting chamber (7), the cleaning structure corresponds to the sliding plate (19), the external drainage structure includes a drainage well (26) and a water pump (27), the water pump (27) corresponds to the drainage well (26), the drainage well (26) corresponds to the second water collecting chamber (8), and a liquid level monitoring structure is installed between the drainage well (26) and the second water collecting chamber (8).

2. The surrounding rock drainage system of an underground compressed air energy storage chamber according to claim 1, characterized in that: The chamber (1) includes a chamber surrounding rock (2), a concrete lining (3) and a steel lining sealing layer (4). The first drain pipe (30) and the second drain pipe (31) are both located on the peripheral side of the chamber surrounding rock (2). A seepage drainage layer (5) is installed between the concrete lining (3) and the steel lining sealing layer (4), and the seepage drainage layer (5) is communicated with the first water collecting chamber (7).

3. The surrounding rock drainage system of an underground compressed air energy storage chamber according to claim 2, characterized in that: Communication chambers (6) are installed on both sides of the first water collecting chamber (7). A plurality of communication ports (14) are formed between the communication chambers (6) and the first water collecting chamber (7). The first drain pipe (30) is communicated with the second drain pipe (31). The first drain pipe (30) and the seepage drainage layer (5) are both communicated with the communication chambers (6). The first water collecting chamber (7) is communicated with the communication chambers (6) through the communication ports (14).

4. The surrounding rock drainage system of an underground compressed air energy storage chamber according to claim 3, characterized in that: A protective shell (15) is installed in the communication chamber (6). A rodless cylinder (32) is fixed in the protective shell (15). A first sliding groove (16) is formed on one side of the protective shell (15). A sliding rod (17) is slidably matched in the first sliding groove (16). The sliding rod (17) is fixedly connected with the sliding plate (19), and the sliding rod (17) is fixedly connected with the output end of the rodless cylinder (32).

5. The surrounding rock drainage system of an underground compressed air energy storage chamber according to claim 1, characterized in that: The sliding plate (19) includes a blocking plate (20) and a water drainage plate (21). A second sliding groove (18) is formed on the bottom in the chamber (1), and the second sliding groove (18) corresponds to the sliding plate (19). A sealing ring is installed on the peripheral side of the sliding plate (19).

6. The surrounding rock drainage system of an underground compressed air energy storage chamber according to claim 5, characterized in that: An inspection opening is formed in the water drainage plate (21), and an inspection door (22) is installed in the inspection opening (22). The supporting structure includes a plurality of support rods (24). A plurality of fixing blocks (23) are fixed on the sliding plate (19), and the fixing blocks (23) are fixedly connected with the support rods (24). The support rods (24) are of an arc-shaped structure, the support rods (24) are in contact with the inner wall of the chamber (1), and a plurality of inclined rods (25) are fixed in the support rods (24).

7. The surrounding rock drainage system of an underground compressed air energy storage chamber according to claim 1, characterized in that: A drain outlet (9) is provided at the bottom inside the first water collecting chamber (7). The drain outlet (9) communicates with the second water collecting chamber (8). The filtering structure includes a filter plate (13) fixed inside the drain outlet (9). The cleaning structure includes a scraping rod (33). The scraping rod (33) is fixedly connected to the sliding plate (19), and the scraping rod (33) is in contact with the inner wall of the first water collecting chamber (7).

8. The surrounding rock drainage system of an underground compressed air energy storage chamber according to claim 7, characterized in that: A diversion pipe (10) is installed between the second water collecting chamber (8) and the drainage well (26). The diversion pipe (10) is of a structure inclined downward. The diversion pipe (10) communicates with the bottom of the second water collecting chamber (8) and the drainage well (26). A first electric valve (11) is installed inside the diversion pipe (10), and a second electric valve (12) is installed inside the drain outlet (9).

9. The surrounding rock drainage system of an underground compressed air energy storage chamber according to claim 8, characterized in that: The liquid level monitoring structure includes a water level sensor (28) installed inside the drainage well (26). The water level sensor (28) and the first electric valve (11) are on the same horizontal line. A water suction pipe (29) is fixed to the water inlet end of the water pump (27), and the water suction pipe (29) is located at the bottom inside the drainage well (26).

10. The drainage method of the surrounding rock drainage system of an underground compressed air energy storage chamber as described in claim 1, characterized in that: It includes the following steps: S1. Guide the groundwater and fissure water into the first water collecting chamber through the first drain pipe and the second drain pipe, and guide the water permeating the surrounding rock of the adit and the concrete lining into the first water collecting chamber through the seepage drainage layer; S2. Collect the fissure water, groundwater and permeated water through the first water collecting chamber, and send it into the second water collecting chamber through the drain outlet; S3. Guide the water in the second water collecting chamber into the drainage well through the diversion pipe until the water level reaches the upper limit, and pump out the water through the water pump; S4. For the adit after exhaust, start the rodless cylinder to drive the sliding plate to slide, drive the support rod to slide and scrape the water on the inner wall of the adit. The water in the adit flows into the first water collecting chamber through the drain plate. Until before intake, slide the sliding plate through the rodless cylinder to adjust the positions of the plug plate and the drain plate.

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