In-situ test system and method suitable for research on ventilation effect of compressed air energy storage cavern

Abstract

The invention provides an in-situ test system and method suitable for compressed air energy storage cavern ventilation effect research, the in-situ test system comprises a compressed air energy storage ventilation simulation system, a test system and a monitoring system, the monitoring system is provided with a plurality of monitoring sections along an in-situ test cavern, and the monitoring sections are used for monitoring water pressure, water quantity, surrounding rock displacement and surrounding rock resistivity. The system is provided with a water pressure monitoring section, a water volume monitoring section, a surrounding rock displacement monitoring section and a surrounding rock resistivity monitoring section, monitoring of key parameters such as surrounding rock water content, pore water pressure, surrounding rock displacement and resistivity under the ventilation effect is achieved, and a new method is provided for researching potential influences of a ventilation system on surrounding rock and an excavation damage area. In the setting of the monitoring system, the installation method of the monitoring device is described in detail, and a guarantee is provided for reasonable and real monitoring data.

Description

Technical Field

[0001] The present invention relates to the technical field of compressed air energy storage and geotechnical engineering, and in particular to an in-situ test system and method suitable for studying the ventilation effect of a compressed air energy storage cavern. Background Art

[0002] During the construction and maintenance phase of compressed air energy storage caverns, ventilation systems are set up by making full use of the construction branch tunnels, inlet and outlet tunnels, and connecting tunnels that have been penetrated to ensure the orderly flow of air in the entire underground gas storage cavern group. However, the ventilation system will cause the water saturation of the surrounding rock and the excavation damage zone to decrease, thereby changing the thermal-hydraulic-mechanical coupling characteristics of the surrounding rock. Moreover, the sealing (air leakage) and stability issues of compressed air energy storage caverns are complex multi-field coupling problems involving cavern thermodynamics, seepage, and mechanics. Therefore, studying the potential impact of the surrounding rock and excavation damage zone caused by the ventilation system is crucial to the bearing mechanism and economical and reasonable design of the compressed air energy storage cavern structure, especially the surrounding rock-lining-sealing layer system.

[0003] In the existing technology, there is a lack of an in-situ test system suitable for studying the ventilation effect of compressed air energy storage caverns, which can analyze the changes in key parameters such as surrounding rock moisture content, pore water pressure, surrounding rock displacement and resistivity under ventilation, and clarify the potential impact of the ventilation system on the surrounding rock and excavation damaged area. Summary of the invention

[0004] The first object of the present invention is to provide an in-situ test system suitable for studying the ventilation effect of compressed air energy storage caverns in response to the above-mentioned problems.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] An in-situ test system suitable for studying the ventilation effect of compressed air energy storage caverns, comprising a compressed air energy storage ventilation simulation system, a test system and a monitoring system;

[0007] The compressed air energy storage ventilation simulation system is an air blowing device and is arranged in the construction cave. The air blowing device includes a compressor, a dryer and a liquid sprayer;

[0008] The test system comprises an air inlet pipe and an air outlet pipe of the in-situ test hole, one end of the air inlet pipe and the air outlet pipe are connected to the construction hole, and the other end is connected to the in-situ test hole, the air inlet pipe and the air outlet pipe are respectively provided with at least two thermometers and hygrometers and flow meters, the top of the in-situ test hole is provided with at least two thermometers and hygrometers, the bottom of the in-situ test hole is provided with at least two water basin devices, a weighing sensor is provided under the water basin device, and closed doors are provided at both ends of the in-situ test hole;

[0009] The monitoring system is provided with a plurality of monitoring sections along the in-situ test hole, and the monitoring sections are used for monitoring water pressure, water volume, surrounding rock displacement and surrounding rock resistivity.

[0010] While adopting the above technical solutions, the present invention may also adopt or combine the following technical solutions:

[0011] As a preferred technical solution of the present invention: there are four water pressure monitoring sections, and each water pressure monitoring section is provided with a number of micro pressure gauges.

[0012] As a preferred technical solution of the present invention: the measuring interval length of the micro pressure gauge is 30 cm, and in a borehole with a total length of 40 cm, the measuring interval length is reduced to 15 cm.

[0013] As a preferred technical solution of the present invention: there are two water volume monitoring sections, and each water volume monitoring section is provided with a plurality of capacitive hygrometers and dry-wet hygrometers.

[0014] As a preferred technical solution of the present invention: the capacitive hygrometer is installed in a groove 2 cm deep from the rock surface and isolated from the atmosphere by a partition.

[0015] As a preferred technical solution of the present invention: there are two surrounding rock displacement monitoring sections, and each surrounding rock displacement monitoring section is provided with a plurality of micro extensometers.

[0016] As a preferred technical solution of the present invention: the surrounding rock resistivity monitoring section is monitored using a geoelectric array.

[0017] As a preferred technical solution of the present invention: the geoelectric array is composed of 4 electrode chains, which are installed in a 1m deep borehole on a plane perpendicular to the axis of the in-situ test hole, each electrode chain is composed of a bundle of single electrode cables, each bundle of single electrode cables is welded to a 5mm electrode fixed on the wall of a plastic half-pipe, and the single electrode cable is sealed in the half-pipe with silicone.

[0018] The second object of the present invention is to provide a method suitable for studying the ventilation effect of compressed air energy storage caverns.

[0019] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0020] An in-situ test method suitable for studying the ventilation effect of a compressed air energy storage cavern comprises the following steps:

[0021] S1: Excavation of in-situ test hole: According to the structural design of the gas storage hole of the compressed air energy storage power station, the axis of the in-situ test hole is perpendicular to the construction hole, the typical cross-section is circular, and steel plate concrete lining is used. Closed doors are used to seal the two ends of the in-situ test hole. Two water basin devices are placed at the bottom of the in-situ test hole to measure the evaporation of free water during the test. The water basin device is placed on the weighing sensor, which can continuously measure its weight loss and automatically replenish water;

[0022] S2: Compressed air energy storage ventilation simulation system layout: The blowing device is placed in the construction hole and connected to the in-situ test hole by the air inlet and outlet pipes. The device consists of a compressor, a dryer and a liquid sprayer. During the test, a part of completely dry air is mixed with another part of air that is completely saturated with steam by using an automatic valve to generate air with a specific temperature and humidity;

[0023] S3: Monitoring system layout: The air inlet and outlet ducts are respectively equipped with an air inlet flow meter, an air outlet flow meter, an air inlet temperature and humidity meter, and an air outlet temperature and humidity meter to measure the air flow, temperature and humidity of the air inlet and outlet ducts during the test. At the same time, the measurement results can be used to calculate the water balance in the test. Two temperature and humidity sensors are arranged on the top of the in-situ test hole to measure the temperature and humidity changes of the air in the hole during the test;

[0024] The in-situ test tunnel is equipped with water pressure monitoring section, water volume monitoring section, surrounding rock displacement monitoring section and surrounding rock resistivity monitoring section along the tunnel section. The depth of the monitoring section is set to 2m. A micro pressure gauge is installed in the water pressure monitoring section, and a capacitive hygrometer and a dry-wet hygrometer are installed in the water volume monitoring section. In addition, a capacitive sensor is installed in a groove 2cm deep from the rock surface in the water volume monitoring section, a micro extensometer is installed in the surrounding rock displacement monitoring section, and a geoelectric array is used for monitoring the surrounding rock resistivity monitoring section. The geoelectric array consists of four electrode chains installed in a 1m deep borehole on a plane perpendicular to the axis of the in-situ test tunnel.

[0025] S4: Test preparation: In order to monitor the various hazardous sources during the compressed air test, surveillance cameras are arranged to monitor the dynamics of the air inlet, air outlet, closed door and other locations, and unified monitoring is achieved in the central control room. Before the formal test, the ventilation system is tested to monitor the gas flow of the air inlet and outlet pipes, and the test is carried out after passing the test;

[0026] S5: Test process: Set the air flow rate to 20m 3 / h, humidity of 80%, and ventilation time of 60 days for field tests.

[0027] The present invention provides an in-situ test system and method suitable for studying the ventilation effect of a compressed air energy storage cavern, which has the following beneficial effects: the system is provided with a water pressure monitoring section, a water volume monitoring section, a surrounding rock displacement monitoring section and a surrounding rock resistivity monitoring section, so as to realize the monitoring of key parameters such as surrounding rock water content, pore water pressure, surrounding rock displacement and resistivity under ventilation, and provide a new method for studying the potential influence of the ventilation system on the surrounding rock and the excavation damaged area; in the setting of the monitoring system, the installation method of the monitoring device is described in detail, so as to provide a guarantee for reasonable and true monitoring data. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of an in-situ test system suitable for studying the ventilation effect of a compressed air energy storage cavern provided by the present invention.

[0029] Figure 2 This is the distribution diagram of micro pressure gauges in the first and second water pressure monitoring sections.

[0030] Figure 3 This is the distribution diagram of micro pressure gauges in the third and fourth water pressure monitoring sections.

[0031] Figure 4 This is the layout diagram of the capacitive hygrometer and wet-dry hygrometer for the first water volume monitoring section.

[0032] Figure 5 This is the layout diagram of the capacitive hygrometer and wet-dry hygrometer for the second water volume monitoring section.

[0033] Figure 6 Layout diagram of the micro extensometers for the first and second surrounding rock displacement monitoring sections.

[0034] Figure 7 Schematic diagram of the geoelectric array for surrounding rock resistivity monitoring section.

[0035] Figure 8 Cross-section of drilling holes for electrodes.

[0036] In the figure: 1-construction hole; 2-in-situ test hole; 3-closed door; 4-blowing device; 5-inlet pipe; 6-outlet pipe; 7-first water pressure monitoring section; 8-second water pressure monitoring section; 9-third water pressure monitoring section; 10-fourth water pressure monitoring section; 11-first water volume monitoring section; 12-second water volume monitoring section; 13-first surrounding rock displacement monitoring section; 14-second surrounding rock displacement monitoring section; 15-surrounding rock resistivity monitoring section; 21-basin device; 22-thermohygrometer; 41-compressor; 42-dryer; 43-liquid sprayer; 51-inlet flowmeter; 52-inlet temperature and humidity meter; 61-outlet flowmeter; 62-outlet temperature and humidity meter; 151-electrode; 152-single electrode cable; 153-silica gel; 154-rock powder. DETAILED DESCRIPTION

[0037] The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

[0038] like Figure 1-8 As shown, an in-situ test system suitable for studying the ventilation effect of compressed air energy storage caverns includes a compressed air energy storage ventilation simulation system, a test system and a monitoring system;

[0039] The compressed air energy storage ventilation simulation system is a blowing device 4 and is arranged in the construction cave 1. The blowing device 4 includes a compressor 41, a dryer 42 and a liquid sprayer 43. In the test, an automatic valve is used to mix a part of completely dry air with another part of air that is completely saturated with steam to generate air with a specific temperature and humidity.

[0040] The test system includes an in-situ test hole 2, an air inlet pipe 5, and an air outlet pipe 6. One end of the air inlet pipe 5 and the air outlet pipe 6 are connected to the construction hole 1, and the other end is connected to the in-situ test hole 2. The air inlet pipe 5 and the air outlet pipe 6 are respectively provided with at least two thermometers and hygrometers and flow meters to measure the air flow, temperature and humidity of the air inlet pipe 5 and the air outlet pipe 6 during the test. The measurement results can be used to calculate the water balance in the test; at least two thermometers and hygrometers 22 are provided on the top of the in-situ test hole 2 to measure the temperature and humidity changes of the air in the hole during the test; at least two water basin devices 21 are provided at the bottom of the in-situ test hole 2 to measure the evaporation of free water in the test, and a weighing sensor is provided under the water basin device 21 to continuously measure its weight loss and automatically replenish water. Both ends of the in-situ test hole 2 are provided with closed doors 3;

[0041] The monitoring system is provided with multiple monitoring sections (9 in this embodiment) along the in-situ test hole 2. The monitoring sections are used to monitor water pressure, water volume, surrounding rock displacement, and surrounding rock resistivity. The depth of the monitoring section is set to 2m, so as to realize the monitoring of key parameters such as surrounding rock water content, pore water pressure, surrounding rock displacement and resistivity under ventilation, and provide a new method for studying the potential impact of the ventilation system on the surrounding rock and excavation damage area.

[0042] There are 4 water pressure monitoring sections, and each water pressure monitoring section is provided with a number of micro pressure gauges (24 in this embodiment).

[0043] The micro pressure gauge consists of a mechanical packer and a filtered measuring interval. The measuring section is isolated by the packer and the resin section between the packer and the wellhead. In the vertically upward wellbore, the resin is injected into the interface between the packer and the rock wall through another pipeline. The second packer is placed near the wellhead to keep the resin in the wellbore. The measuring interval length of the micro pressure gauge is 30cm. In a borehole with a total length of 40cm, the measuring interval length is reduced to 15cm.

[0044] There are two water volume monitoring sections, and each water volume monitoring section is provided with a number of capacitive hygrometers (14 in this embodiment) and dry-wet hygrometers (16 in this embodiment).

[0045] After installing the sensor, the borehole was filled with isolation grout and the capacitive moisture meter was installed in a groove 2 cm deep from the rock surface and isolated from the atmosphere by a partition.

[0046] There are two surrounding rock displacement monitoring sections, each of which is provided with a number of micro extensometers (eight in this embodiment). The micro extensometer is fixed to the end of the wellbore by an extension rod connected to a mechanical anchor, and is fixed to the rock surface by a bolt plate. The free space between the sucker rod and the rock in the well is filled with polyurethane foam to enable the sucker rod to move. Due to the expected small displacement, in order to minimize the error that may be caused by temperature changes, a temperature sensor is provided on the head of the extensometer for temperature compensation.

[0047] The surrounding rock resistivity monitoring section 15 is monitored using a geoelectric array.

[0048] The geoelectric array consists of four electrode chains installed in a 1-m-deep borehole on a plane perpendicular to the axis of the in-situ test hole, and the boreholes are arranged in a quarter cross-section.

[0049] Each electrode chain consists of a bundle of single electrode cables 152, each of which is welded to a 5 mm electrode 151 fixed on the wall of a plastic half-pipe. The single electrode cables 152 are sealed in the half-pipe with silicone 153 and led out of the borehole to connect to a plug fixed on the wall of the cave. To ensure that the electrode 151 is pressed against the rock, the remaining space in the borehole is filled with rock powder 154 and compacted with a stick.

[0050] An in-situ test method suitable for studying the ventilation effect of compressed air energy storage caverns includes the following steps:

[0051] S1: Excavation of the in-situ test hole: According to the structural design of the compressed air energy storage power station gas storage hole, the axis of the in-situ test hole 2 is perpendicular to the construction hole 1, the typical cross section is circular, and steel plate concrete lining is adopted. The two ends of the in-situ test hole 2 are sealed with closed doors 3. Two water basin devices 21 are placed at the bottom of the in-situ test hole 2 to measure the evaporation of free water during the test. The water basin device 21 is placed on the weighing sensor, which can continuously measure its weight loss and automatically replenish water;

[0052] S2: Layout of compressed air energy storage ventilation simulation system: The blowing device 4 is placed in the construction hole 1 and connected to the in-situ test hole 2 by the air inlet pipe 5 and the air outlet pipe 6. The device consists of a compressor 41, a dryer 42 and a liquid sprayer 43. In the test, a part of completely dry air is mixed with another part of air that is completely saturated with steam by using an automatic valve to generate air with a specific temperature and humidity;

[0053] S3: Monitoring system arrangement: The air inlet duct 5 and the air outlet duct 6 are respectively provided with an air inlet flow meter 51 and an air outlet flow meter 61 and an air inlet temperature and humidity meter 52 and an air outlet temperature and humidity meter 62 to measure the air flow, temperature and humidity of the air inlet duct 5 and the air outlet duct 6 during the test. At the same time, the measurement results can be used to calculate the water balance during the test. Two temperature and humidity sensors 22 are arranged on the top of the in-situ test hole 2 to measure the temperature and humidity changes of the air in the hole during the test;

[0054] The in-situ test cave 2 is equipped with water pressure monitoring section, water volume monitoring section, surrounding rock displacement monitoring section and surrounding rock resistivity monitoring section along the cave section. The depth of the monitoring section is set to 2m. The water pressure monitoring section is equipped with a micro pressure gauge, and the water volume monitoring section is equipped with a capacitive hygrometer and a dry-wet hygrometer. In addition, the water volume monitoring section is equipped with a capacitive sensor in a groove 2cm deep from the rock surface, and the surrounding rock displacement monitoring section is equipped with a micro extensometer. The surrounding rock resistivity monitoring section 15 is monitored using a geoelectric array, which consists of four electrode chains and is installed in a 1m deep borehole on a plane perpendicular to the axis of the in-situ test cave 2.

[0055] S4: Test preparation: In order to monitor the various hazardous sources during the compressed air test, surveillance cameras are arranged to monitor the dynamics of the air inlet, air outlet, closed door 3 and other locations, and unified monitoring is achieved in the central control room. Before the formal test, the ventilation system is tested to monitor the gas flow of the air inlet duct 5 and the air outlet duct 6. The test is carried out after the test is qualified;

[0056] S5: Test process: Set the air flow rate to 20m 3 / h, humidity of 80%, and ventilation time of 60 days for field tests.

[0057] Specifically, the in-situ test system for the study of ventilation effect of compressed air energy storage caverns is implemented in the following manner:

[0058] The installed capacity of a compressed air energy storage power station is 300MW, the operating pressure range is 7MPa-10 MPa, the energy storage hours are 5.7 hours, and the power generation hours are 4 hours. The new structure in the area where the compressed air energy storage power station is located is not active, the rock is hard, the structural transformation is weak, the integrity is good, there is no regional fault passing through, the fault is not developed, and the surrounding rock is mainly II-III. The typical cross-section of the gas storage cave is circular, with steel plate concrete lining, excavation diameter of 12m, and backfill concrete thickness of 100cm.

[0059] S1: Excavation of the in-situ test hole: According to the structural design of the gas storage hole of the compressed air energy storage power station, the axis of the in-situ test hole 2 is designed to be perpendicular to the construction hole 1. The typical cross-section is circular, and steel plate concrete lining is used. The excavation diameter is 12m, the excavation length is 10m, and the backfill concrete thickness is 100cm. Closed doors 3 are used to seal the two ends of the in-situ test hole 2. Two water basin devices 21 are placed at the bottom of the in-situ test hole 2 to measure the evaporation of free water during the test. The water basin device 21 is placed on the weighing sensor, which can continuously measure its weight loss and automatically replenish water;

[0060] S2: Layout of compressed air energy storage ventilation simulation system: The blowing device 4 is placed in the construction hole 1 and connected to the in-situ test hole 2 by the air inlet pipe 5 and the air outlet pipe 6. The device consists of a compressor 41, a dryer 42 and a liquid sprayer 43. In the test, a part of completely dry air is mixed with another part of air that is completely saturated with steam by using an automatic valve to generate air with a specific temperature and humidity;

[0061] S3: Monitoring system layout: The air inlet duct 5 and the air outlet duct 6 are respectively provided with an air inlet flow meter 51 and an air outlet flow meter 61 and an air inlet temperature and humidity meter 52 and an air outlet temperature and humidity meter 62 to measure the air flow, temperature and humidity of the air inlet duct 5 and the air outlet duct 6 during the test. At the same time, the measurement results can be used to calculate the water balance during the test. Two temperature and humidity meters 22 are arranged on the top of the in-situ test hole 2 to measure the temperature and humidity changes of the air in the hole during the test;

[0062] Nine sections were set up along the in-situ test tunnel 2, including 4 water pressure monitoring sections, 2 water volume monitoring sections, 2 surrounding rock displacement monitoring sections, and 1 surrounding rock resistivity monitoring section 15. The depth of the monitoring section was set to 2m, and 4, 8, 4, and 8 micro pressure gauges (such as Figure 2-3 ); 7 capacitive hygrometers and 8 dry and wet hygrometers are installed at the first and second water volume monitoring sections 11 / 12 respectively (such as Figure 4-5 ), a capacitive sensor was installed in a groove 2 cm deep from the rock surface in the first and second water volume monitoring sections 11 / 12; four micro extensometers (such as Figure 6); The surrounding rock resistivity monitoring section 15 is monitored using a geoelectric array, which consists of four electrode chains installed in a borehole about 1m deep on a plane perpendicular to the axis of the in-situ test hole 2 (such as Figure 7-8 );

[0063] S4: Test preparation: In order to monitor the various hazardous sources during the compressed air test, four surveillance cameras are arranged to monitor the dynamics of the air inlet, air outlet, closed door 3 and other locations respectively, and unified monitoring is achieved in the central control room. Before the formal test, the ventilation simulation system is tested to monitor the gas flow of the air inlet duct 5 and the air outlet duct 6. The test is carried out after the test is qualified;

[0064] S5: Test process: Set the air flow rate to 20m 3 / h, humidity of 80%, and ventilation time of 60 days for field tests.

[0065] The above-mentioned specific implementation methods are used to explain the present invention and are only preferred embodiments of the present invention, rather than limiting the present invention. Any modifications, equivalent substitutions, improvements, etc. made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.

Claims

1. An in-situ test system suitable for studying the ventilation effect of compressed air energy storage caverns, characterized by: Including compressed air energy storage ventilation simulation system, test system and monitoring system; The compressed air energy storage ventilation simulation system is an air blowing device (4) and is arranged in the construction cave (1). The air blowing device (4) comprises a compressor (41), a dryer (42) and a liquid sprayer (43); The test system comprises an in-situ test hole (2), an air inlet pipe (5), and an air outlet pipe (6); one end of the air inlet pipe (5) and the air outlet pipe (6) are connected to the construction hole (1), and the other end is connected to the in-situ test hole (2); the air inlet pipe (5) and the air outlet pipe (6) are respectively provided with at least two thermometers and hygrometers and flow meters; at least two thermometers and hygrometers (22) are provided at the top of the in-situ test hole (2); at least two water basin devices (21) are provided at the bottom of the in-situ test hole (2); a weighing sensor is provided under the water basin device (21); and closed doors (3) are provided at both ends of the in-situ test hole (2); The monitoring system is provided with a plurality of monitoring sections along the in-situ test hole (2), and the monitoring sections are used for monitoring water pressure, water volume, surrounding rock displacement and surrounding rock resistivity.

2. The in-situ test system for the study of ventilation effect of compressed air energy storage caverns according to claim 1 is characterized in that: There are four water pressure monitoring sections, and each water pressure monitoring section is provided with a number of micro pressure gauges.

3. The in-situ test system for the study of ventilation effect of compressed air energy storage caverns according to claim 2 is characterized in that: The measuring interval length of the micro pressure gauge is 30 cm, which is reduced to 15 cm in a borehole with a total length of 40 cm.

4. The in-situ test system for the study of ventilation effect of compressed air energy storage caverns according to claim 1 is characterized in that: There are two water volume monitoring sections, and each water volume monitoring section is provided with a plurality of capacitive hygrometers and dry-wet hygrometers.

5. The in-situ test system for the study of ventilation effect of compressed air energy storage caverns according to claim 4 is characterized in that: The capacitive hygrometer was installed in a groove 2 cm deep from the rock surface and isolated from the atmosphere by a partition.

6. The in-situ test system for the study of ventilation effect of compressed air energy storage caverns according to claim 1 is characterized in that: There are two surrounding rock displacement monitoring sections, and each surrounding rock displacement monitoring section is provided with a plurality of micro extensometers.

7. The in-situ test system for the study of ventilation effect of compressed air energy storage caverns according to claim 1 is characterized in that: The surrounding rock resistivity monitoring section (15) is monitored using a geoelectric array.

8. The in-situ test system for the study of ventilation effect of compressed air energy storage caverns according to claim 7 is characterized in that: The geoelectric array is composed of four electrode chains installed in a 1m deep borehole on a plane perpendicular to the axis of the in-situ test hole. Each electrode chain is composed of a bundle of single electrode cables (152). Each bundle of single electrode cables (152) is welded to a 5mm electrode (151) fixed on the wall of a plastic half-pipe. The single electrode cable (152) is sealed in the half-pipe with silicone (153).

9. An in-situ test method suitable for studying the ventilation effect of compressed air energy storage caverns, characterized in that: The method is based on the in-situ test system suitable for studying the ventilation effect of compressed air energy storage caverns as described in any one of claims 1 to 8, and comprises the following steps: S1: Excavation of the in-situ test hole: According to the structural design of the compressed air energy storage power station gas storage hole, the axis of the in-situ test hole (2) is perpendicular to the construction hole (1), the typical cross section is circular, and steel plate concrete lining is adopted. The two ends of the in-situ test hole (2) are sealed with closed doors (3). Two water basin devices (21) are placed at the bottom of the in-situ test hole (2) to measure the evaporation of free water during the test. The water basin device (21) is placed on a weighing sensor, which can continuously measure its weight loss and automatically replenish water; S2: Layout of compressed air energy storage ventilation simulation system: The blowing device (4) is placed in the construction hole (1) and connected to the in-situ test hole (2) by an air inlet pipe (5) and an air outlet pipe (6). The device consists of a compressor (41), a dryer (42) and a liquid sprayer (43). During the test, a part of completely dry air is mixed with another part of air that is completely saturated with steam by using an automatic valve to generate air with a specific temperature and humidity; S3: Layout of monitoring system: The air inlet pipe (5) and the air outlet pipe (6) are respectively provided with an air inlet flow meter (51), an air outlet flow meter (61), an air inlet temperature and humidity meter (52), and an air outlet temperature and humidity meter (62) to measure the air flow, temperature and humidity of the air inlet pipe (5) and the air outlet pipe (6) during the test. At the same time, the measurement results can be used to calculate the water balance during the test. Two temperature and humidity sensors (22) are arranged on the top of the in-situ test hole (2) to measure the temperature and humidity changes of the air in the hole during the test; The in-situ test hole (2) is provided with a water pressure monitoring section, a water volume monitoring section, a surrounding rock displacement monitoring section, and a surrounding rock resistivity monitoring section along the hole section. The depth of the monitoring section is set to 2 m. A micro pressure gauge is installed in the water pressure monitoring section, and a capacitive hygrometer and a dry-wet hygrometer are installed in the water volume monitoring section. In addition, a capacitive sensor is installed in a groove 2 cm deep from the rock surface in the water volume monitoring section, and a micro extensometer is installed in the surrounding rock displacement monitoring section. The surrounding rock resistivity monitoring section (15) is monitored using a geoelectric array, which consists of four electrode chains installed in a 1 m deep borehole on a plane perpendicular to the axis of the in-situ test hole (2). S4: Test preparation: In order to monitor the various hazardous sources during the compressed air test, surveillance cameras are arranged to monitor the dynamics of the air inlet, air outlet, and closed door (3) respectively, and unified monitoring is achieved in the central control room. Before the formal test, the ventilation system is tested to monitor the gas flow of the air inlet pipe (5) and the air outlet pipe (6). The test is carried out after the test is qualified; S5: Test process: Set the air flow rate to 20m 3 / h, humidity of 80%, and ventilation time of 60 days for field tests.

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