CN115452256A - Airtight wall performance testing device and method for utilization of compressed gas energy storage in abandoned shaft and roadway space - Google Patents

Abstract

The invention provides a device and a method for testing the performance of a sealed wall utilizing compressed air and stored energy in space of a waste roadway, and relates to the technical field of rock mechanics testing devices. The device is used for testing, the air tightness can be judged by detecting the ion concentration of liquid in the water filling cavity, and the tightness of the sealing wall under the action of different water pressures, air pressures and surrounding rock pressures, stress, displacement and other conditions can be detected through simulation.

Description

Airtight wall performance test device and method for utilization of compressed gas energy storage in abandoned shaft and roadway space

technical field

The invention relates to the technical field of rock mechanics testing devices, and in particular provides a performance testing device and method for airtight walls utilizing compressed gas energy storage in abandoned shafts.

Background technique

Utilizing abandoned mines for compressed air energy storage has become an effective means of regulating power supply and reusing abandoned mines. The airtight wall in the compressed gas storage mine is used to prevent the compressed gas from leaking out and prevent the mine water from entering the area where the compressed gas is stored. And the pressure, but also to bear the pressure of a large compressed gas, the performance of the airtight wall has a significant impact on the engineering effect.

When the wall body of the airtight wall under the mine must bear relatively high pressure, a truncated conical structure should be selected. The performance of the airtight wall is the focus of research. In the prior art, a Chinese patent (CN204613207U) discloses a concrete anti-scour airtight wall The similar simulation test device is used for the similar simulation of the concrete permanent airtight wall of the underground goaf and the detection of the pressure and displacement of the airtight wall when it is impacted; the technology does not consider the wall structure shape specified by the national standard, and the wall shape cannot affect the wall. Influenced by airtightness and stability, and unable to detect the performance change of the wall under the action of mine water, it is not suitable for the wall detection of the airtight wall with waterproof and air-proof function. Chinese patent (CN205246290U) discloses a test device for detecting the airtightness of airtight walls. By detecting the gas concentration and judging the airtightness of airtight walls made of different materials, the barrier performance of airtight materials can be effectively detected; this technology is suitable for testing fixed airtightness under normal pressure. The function of the airtightness of the rectangular wall of the shape is also not suitable for the wall detection of the airtight wall with the function of waterproof and air barrier.

Airtight walls made of different materials have different sealing properties for air and water, as well as different compression and erosion resistance capabilities. If the performance of the airtight wall is not good, it will cause the overflow of compressed air and the influx of mine water, which in turn will cause the compressed air energy storage system to Out of action. The performance test of the airtight wall is very important, but the existing technology cannot be used to test the performance of the airtight wall under the action of high water pressure and high air pressure.

Contents of the invention

In order to detect the airtightness, stress, displacement, etc. of the airtight wall under different water pressure, air pressure, and surrounding rock pressure, and to facilitate the performance test of the airtight wall, the present invention provides an airtight wall for the utilization of compressed gas energy storage in the space of an abandoned shaft The performance testing device and method, the specific technical scheme is as follows.

A closed wall performance test device for utilization of compressed air energy storage in abandoned shaft and lane space, including a box body, a hydraulic sealing cover, an air pressure sealing cover, a water-filled cavity, an inflatable cavity, a truncated cone cavity, a water supply pipeline, a loading system and Monitoring device, concrete is poured in the box, the upper bottoms at both ends of the truncated cone cavity are respectively connected to the water-filled cavity and the inflatable cavity; the water supply pipeline is connected to the water-filled cavity, the air pump is connected to the inflatable cavity, and the hydraulic sealing cover is set At the end of the water-filled cavity, an air-tight seal cover is placed at the end of the gas-filled cavity; the loading system simulates the pressure of the overlying and lateral surrounding rock, and the monitoring device determines the stress and displacement in the closed wall Variety.

Preferably, the truncated cone cavity includes a first truncated cone cavity, a second truncated cone cavity, a first cylindrical cavity, a third truncated cone cavity, a fourth truncated cone cavity, a second cylindrical cavity, a fifth truncated cone cavity, a sixth The truncated cone cavity is connected by threads in turn; the upper bottom of the first truncated cone cavity is connected with the circular hollow cover of the water-filled cavity, and the upper bottom of the sixth truncated cone cavity is connected with the circular hollow cover on the inflatable cavity connect.

Preferably, a base is provided under the box and fixed by bolts, concrete is poured into the box, and the concrete, water-filled cavity, air-filled cavity, and truncated cone cavity jointly simulate the surrounding rock.

Preferably, a stress sensor is arranged in the cavity of the truncated cone, and the stress sensor monitors the stress change in the airtight wall, and a displacement sensor is arranged on the wall of the airtight wall of the inverted truncated cone, and the displacement sensor monitors the displacement change in the airtight wall.

Preferably, the water supply pipeline includes a water pump, a water tank, a water guide pipe and a water pressure gauge, the water pump draws water from the water tank through the water guide pipe, the water guide pipe is connected to the water hole on the water filling cavity, and the water guide pipe is also provided with a water pressure gauge .

It is also preferable that the air pressure hole of the inflatable cavity is connected with an air guide tube, and the air guide tube is connected to the air storage device through an air pump, and the air guide tube is also provided with a barometer.

Also preferably, the loading system includes an upper loading mechanism, an upper platen, a first side loading mechanism, a first side platen, a second side loading mechanism, a second side platen, an upper platen, a first side platen and The second lateral pressure plate applies pressure to the simulated surrounding rock.

A method for testing the performance of an airtight wall for utilization of compressed gas energy storage in abandoned wells and lanes, using the above-mentioned airtight wall performance testing device for utilization of compressed air energy storage in abandoned wells and lanes, the steps include:

S1. Apply mold release oil in the box, and install water-filled cavity, air-filled cavity and truncated cone cavity in combination;

S2. Make the airtight wall, take out the airtight wall as a whole from the box after solidification, arrange the displacement sensor, install the water pressure sealing cover and the air pressure sealing cover;

S3. Place the test concrete material on the support frame, and inject water into the water-filled cavity, and simulate the air in the roadway to be discharged from the vent hole;

S4. Inject gas into the inflatable cavity, and apply the overlying surrounding rock pressure and lateral surrounding rock pressure through the loading system simulation;

S5. Monitor the pressure in the inflatable cavity through the pressure relief hole, and then inject gas into the inflatable cavity again to simulate the cycle process of compressing and deflated;

S6. Monitor the liquid in the water-filled cavity to judge the airtightness of the airtight wall, drill holes in the airtight wall and observe the development of cracks through a micro-camera, judge the penetration of the liquid by adding iodine solution in the liquid, and perform mechanical testing by drilling cores. Performance Testing.

It is further preferred to change the water pressure in the water-filled chamber, the air pressure in the air-filled chamber and the load applied by the loading system to monitor the performance of the airtight wall under different conditions.

Further preferably, the influence of different heights and cross-sectional areas on the performance of the airtight wall is detected by adjusting the installation combination of the truncated cone chamber.

The invention provides an airtight wall performance testing device and method for utilization of compressed air energy storage in the abandoned well lane space. The beneficial effect is that the device can test the airtightness, stress, displacement And the detection and analysis of the damage situation facilitates the research on the performance of the airtight wall. In addition, the inverted truncated cone wall with different diameters and heights can be combined according to the needs, so as to simulate the situation of the underground wall more realistically and effectively; the performance test of the airtight wall ensures that The development of waste gas mine compressed gas storage and utilization, and its safety and reliability have been improved.

Description of drawings

Figure 1 is a schematic diagram of the structure of the airtight wall performance test device for the utilization of compressed gas energy storage in the abandoned shaft and roadway space

Fig. 2 is a side sectional view of the airtight wall performance testing device;

Fig. 3 is a schematic diagram of the base plate structure;

Fig. 4 is a schematic diagram of the structure and layout of the sealing cover;

Figure 5 is a schematic diagram of the cavity structure of the simulated roadway;

Figure 6 is an exploded view of a truncated cone cavity structure;

Figure 7 is a schematic diagram of cavity combination;

Figure 8 is a schematic diagram of concrete pouring;

Fig. 9 is a schematic diagram of the layout of the airtight wall sensor;

Fig. 10 is a schematic diagram of pouring the airtight wall;

In the figure: 1-box body, 2-bottom plate, 3-hydraulic sealing cover, 4-air pressure sealing cover, 5-water-filled cavity, 6-circular hollow cover, 7-inflatable cavity, 8-circular hollow Cover, 9-first truncated cone chamber, 10-second truncated cone chamber, 11-first cylindrical chamber, 12-third truncated cone chamber, 13-fourth truncated cone chamber, 14-second cylindrical chamber, 15- The fifth truncated cone cavity, 16-the sixth truncated cone cavity, 17-water hole, 18-ventilation hole, 19-pressure air hole, 20-pressure relief hole, 21-water pump, 22-water tank, 23-aqueduct, 24 -water pressure gauge, 25-barometer, 26-first valve, 27-air pump, 28-air storage device, 29-air guide tube, 30-barometer, 31-second valve, 32-base, 33-support frame , 34-upper loading mechanism, 35-upper pressing plate, 36-first lateral loading mechanism, 37-first lateral pressing plate, 38-second lateral loading mechanism, 39-second lateral pressing plate, 40-concrete, 41-river sand, 42-mica, 43-closed wall material, 44-stress sensor, 45-displacement sensor.

detailed description

With reference to FIGS. 1 to 10 , the specific implementation of a closed wall performance testing device and method for utilization of compressed gas energy storage in abandoned shaft and roadway space provided by the present invention will be described.

A closed wall performance test device for the use of compressed gas energy storage in the space of abandoned shafts. The device can detect and analyze the airtightness, stress, displacement and damage of the closed wall under different water pressure, air pressure and confining pressure, which is convenient. The research on the performance of the airtight wall can also combine inverted truncated cone walls with different diameters and heights according to the needs, so as to simulate the situation of the underground wall more realistically and effectively.

The structure of the device specifically includes a box body 1, a hydraulic sealing cover 3, an air pressure sealing cover 4, a water-filled cavity 5, an air-filled cavity 7, a truncated cone cavity, a water supply pipeline, a loading system and a monitoring device. Make a simulated airtight wall, the hydraulic sealing cover and the air pressure sealing cover cooperate with the water-filled cavity and the inflatable cavity to simulate the roadway, the combination of the truncated cone cavity, the water-filled cavity, and the inflatable cavity forms a cavity combination, and the water supply pipeline can provide settings The water volume and water pressure, the loading system simulates the surrounding rock stress, and the monitoring device can monitor the stress and displacement of the closed wall. Concrete 40 can be poured in the box body 1, and the upper bottoms at both ends of the truncated cone cavity are respectively connected with the water-filled cavity 5 and the air-filled cavity 7. The water supply pipeline is connected with a water-filled cavity 5, and one end of the water-filled cavity 5 is provided with a circular hollow cover, and threads are also provided on the edge, and the whole can be in the shape of a cuboid. The circular hollow cover is also provided with threads on the edge, and the whole can be in the shape of a cuboid. The hydraulic sealing cover 3 is arranged at the end of the water-filled cavity 5, one side of the hydraulic sealing cover 3 is a rubber pad, and the other side is a rigid material, and there is a water hole 17 near the lower edge; the air pressure sealing cover 4 is arranged in the air-filled cavity The end of body, air pressure sealing cover 4 one sides are rubber pads, and one side is rigid material, and air pressure sealing cover 4 centers have pressure hole, and pressure relief hole 20 is arranged near pressure hole 19. The loading system simulates the pressure of the overlying and lateral surrounding rock, and the monitoring device determines the stress and displacement changes in the closed wall.

The truncated cone cavity includes a first truncated cone cavity 9, a second truncated cone cavity 10, a first cylindrical cavity 11, a third truncated cone cavity 12, a fourth truncated cone cavity 13, a second cylindrical cavity 14, and a fifth truncated cone cavity 15 , the sixth truncated cone cavity 16, and sequentially threaded to form an inverted truncated cone wall cavity. The upper bottom of the first truncated cone cavity 9 and the inner side of the lower bottom all have threads, and the upper bottom of the first truncated cone cavity 9 is connected with the circular hollow cover of the water-filled cavity 5; There are threads on the outside of the lower bottom, threads on the outside of both ends of the first cylindrical cavity, threads on the upper bottom and the inside of the lower bottom of the third truncated cone cavity 12, and threads on the inside and outside of the bottom of the fourth truncated cone cavity 13. Screw thread, the outside of the second cylindrical cavity 14 both ends has thread, the inside of the bottom of the fifth truncated cone cavity 15, the outside of the lower bottom have threads, the inside of the upper and lower bottom of the sixth truncated cone cavity 16 has threads, and the inside of the sixth truncated cone cavity 16 The upper bottom is connected with the circular hollow cover on the inflatable cavity to form a cavity combination. Combining truncated cone cavities with different heights and different upper and lower bottom diameters, and pouring closed wall materials can obtain closed walls with different shapes of inverted truncated cone structures.

A stress sensor 44 is arranged on the inner surface of the truncated cone cavity, and the stress sensor monitors the stress change in the airtight wall, and monitors the stress change at each point of the airtight wall in real time during the test. A displacement sensor 45 is arranged on the wall of the inverted truncated cone airtight wall, and the displacement sensor monitors the displacement change in the airtight wall.

The bottom of the box body 1 is provided with a base and fixed by bolts. The box body 1 is poured with concrete 40, and the concrete, water-filled cavity, air-filled cavity, and truncated cone cavity jointly simulate the surrounding rock. In the box body 1, release oil can be applied and the cavity combination can be fixed on the base 32, then the box body 1 can be erected with the base as the bottom, and concrete materials can be poured between the cavity combination and the box body. Co-simulate surrounding rock.

The water supply pipeline comprises a water pump 21, a water tank 22, an aqueduct 23 and a water pressure gauge 24. The water pump 21 draws water from the water tank 22 by an aqueduct 23, and the aqueduct 23 connects the water hole on the water-filled cavity. A water pressure gauge 24 is provided. The air pressure hole of the inflatable cavity 7 is connected with an air guide tube 29, and the air guide tube 29 is connected to the gas storage device through an air pump. The air guide tube 29 is also provided with a barometer 30.

Its loading system comprises an upper loading mechanism 34, an upper pressing plate 35, a first lateral loading mechanism 36, a first lateral pressing plate 37, a second lateral loading mechanism 38, a second lateral pressing plate 39, an upper pressing plate 35, a first side The pressure plate 37 and the second lateral pressure plate 39 apply pressure to the simulated surrounding rock through the upper loading mechanism 34 , the first lateral loading mechanism 36 and the second lateral loading mechanism 38 respectively.

A method for testing the performance of an airtight wall for utilization of compressed gas energy storage in abandoned wells and lanes, using the above-mentioned airtight wall performance testing device for utilization of compressed air energy storage in abandoned wells and lanes, the steps include:

Step S1. Apply mold release oil in the box, and assemble the water-filled cavity, the air-filled cavity and the truncated cone cavity.

Step S2. Make the airtight wall. After the concrete is solidified, take the airtight wall out of the box as a whole, arrange the displacement sensor, and install the water pressure sealing cover and the air pressure sealing cover.

Fix the base on the box with bolts, brush a layer of release oil in the box to fix the cavity combination on the base, stand up the box with the base and the cavity combination fixed on the base, and move toward the cavity combination Concrete material is poured between the box body and the concrete and the cavity body to simulate the surrounding rock. Pour river sand into the cavity combination, stop when the river sand is parallel to the water-filled cavity, spread a layer of mica on the river sand, inject airtight wall material into the combined cavity, the airtight wall material and the upper bottom of the sixth truncated cone cavity Stop when parallel.

After the concrete material and the airtight wall material are all solidified, take off the base, pour out the river sand in the water-filled cavity, take the solidified concrete material together with the inner cavity and the airtight wall from the box, and place it in the inverted truncated cone Displacement sensors are arranged on the surface of the airtight wall, the hydraulic sealing cover is fixed at the end of the water-filled cavity, and the air-pressure sealing cover is fixed at the end of the inflatable cavity. The concrete material is combined with the inner cavity body, the airtight wall body, and the sealing cover are fixed on the supporting frame.

Step S3. Place the test concrete material on the supporting frame, and inject water into the water-filled cavity, simulating that the air in the roadway is discharged from the ventilation hole.

The water pump injects the liquid in the water tank into the water-filled cavity through the water guide pipe and the water hole. The water pressure gauge is installed on the water guide tube to monitor the water pressure. When injecting water into the water-filled cavity, the air in the simulated roadway passes through the vent hole Exhaust, close the first valve after the gas is exhausted.

Step S4. Inject gas into the inflatable cavity, and simulate the pressure of the overlying surrounding rock and the lateral surrounding rock through the loading system.

The air pump passes the gas in the gas storage device through the air guide tube, and presses it into the inflatable cavity through the air pressure hole. The air guide tube is equipped with a barometer to monitor the air pressure. The overlying surrounding rock pressure is simulated through the upper loading system and the upper pressing plate, and the lateral surrounding rock pressure is simulated through the first lateral loading system, the first lateral pressing plate, the second lateral loading system, and the second lateral pressing plate. Stress sensors and displacement sensors monitor and analyze the changes in wall stress and displacement.

Step S5. Monitor the pressure in the inflatable cavity by releasing the pressure through the pressure relief hole, and then inject gas into the inflatable cavity again to simulate the cycle process of compressing and deflated.

Open the second valve and release the pressure through the pressure relief hole. The barometer can monitor the gas pressure in the inflatable roadway. After the pressure is released, the air pump will pass the gas in the gas storage device through the air guide tube and press it into the cavity of the inflatable roadway through the pressure hole. , cyclic pressurization and decompression, which can simulate the situation of cyclic compression and degassing in the process of compressed gas energy storage. The inflation and deflation time is simulated according to the time ratio of the peak power consumption period and the low power consumption period in the area where the simulated compressed gas storage mine is located.

Step S6. Monitor the liquid in the water-filled cavity to judge the airtightness of the airtight wall, drill holes in the airtight wall and observe the development of cracks through a micro-camera, judge the penetration of the liquid by adding iodine solution in the liquid, and take cores by drilling Mechanical property test.

When the gas filled in the inflatable cavity can react with water, the liquid in the water-filled tunnel can be discharged through the water guide pipe, the ion concentration in the liquid can be detected, and whether there is air leakage in the airtight wall can be judged, and then the airtight performance can be judged.

After being filled with water, air and pressurized for a certain period of time, the inverted truncated cone airtight wall is drilled, and a micro camera is inserted into the hole to observe the development of cracks inside the wall. When starch is mixed into the airtight wall material, and iodine solution is added to the liquid injected into the water-filled cavity, the camera can be used to observe whether the color inside the wall turns blue, and the range of blueness can be used to judge the water penetration of the airtight wall. When the filled water reaches the pressure required for the test (such as 6MPa), stop filling and continue to fill the water, and simulate the inflation and deflation time according to the time ratio of the peak power consumption period and the low power consumption period in the area where the compressed gas storage mine is located. Stage continuous pressurization simulates the surrounding rock pressure, and the total duration of the test depends on the demand.

After being filled with water, air and pressurized for a certain period of time, some test blocks of the closed wall material can be taken out by drilling and coring for mechanical performance testing, and mechanical performance tests can be carried out on the same volume of test pieces made of the same closed wall material , to compare and analyze the effect of water pressure and air pressure on the mechanical properties of the closed wall.

In addition, by changing the type and ratio of the material of the airtight wall, through multiple tests, the performance of the airtight wall of different materials can be detected.

The water pressure in the water-filled chamber, the air pressure in the air-filled chamber and the load imposed by the loading system can also be changed, so as to monitor the performance of the airtight wall under different conditions. For example, changing the water pressure value in multiple tests is used to simulate the effect of mine water at different pressures on the closed wall; changing the air pressure in multiple experiments is used to simulate the air with different degrees of compression in the compressed air energy storage project. The influence of the wall; changing the load of the loading system in multiple tests is used to simulate the influence of different surrounding rock pressures on the closed wall.

The influence of different heights and cross-sectional areas on the performance of the closed wall is detected by adjusting the installation combination of the truncated cone cavity. By changing the combination of the truncated cone chamber and the cylindrical chamber, inverted truncated cone chambers with different heights and cross-sectional areas can be obtained. Through multiple experiments, the performance of the closed walls of inverted truncated cones with different heights and cross-sectional areas can be tested.

This method can simulate and detect the airtightness and performance changes of the airtight wall under the multiple effects of water pressure and air pressure surrounding rock pressure. It can also form walls with different heights, diameters, and numbers of truncated cones through different combinations of truncated cones. The test tests the sealing performance, force and displacement of the wall under different shapes; the material of the wall can be changed to test the performance of the airtight wall under different materials; the internal stress of the wall and the displacement of the wall can be tested; the resistance of the wall to gas can be measured. Airtightness and resistance to water penetration. The method guarantees the development of compressed gas energy storage utilization in waste gas mines through the performance test of the airtight wall, and improves its safety and reliability.

Of course, the above descriptions are not intended to limit the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or replacements made by those skilled in the art within the scope of the present invention shall also belong to the present invention. protection scope of the invention.

Claims (10)

1. An airtight wall performance testing device for utilization of compressed air energy storage in abandoned shaft and roadway space, characterized in that it includes a box body, a hydraulic sealing cover, an air pressure sealing cover, a water-filled cavity, an inflatable cavity, a truncated cone cavity, a water supply Pipeline, loading system and monitoring device, concrete is poured in the box, and the upper bottoms at both ends of the truncated cone cavity are respectively connected to the water-filled cavity and the inflatable cavity; the water supply pipeline is connected to the water-filled cavity, and the air pump is connected to the inflatable cavity , the water pressure sealing cover is arranged at the end of the water-filled cavity, and the air pressure sealing cover is arranged at the end of the air-filled cavity; the loading system simulates the pressure of the overlying surrounding rock and the lateral surrounding rock, and the monitoring device determines the airtight Stress and displacement changes within the wall. 2. The airtight wall performance test device for utilization of compressed gas energy storage in abandoned shaft and roadway space according to claim 1, wherein the truncated cone cavity includes a first truncated cone cavity, a second truncated cone cavity, a first The cylindrical cavity, the third truncated cone cavity, the fourth truncated cone cavity, the second cylindrical cavity, the fifth truncated cone cavity, and the sixth truncated cone cavity are connected by threads in turn; the upper bottom of the first truncated cone cavity is connected with the filling The circular hollow cover of the water cavity is connected, and the upper bottom of the sixth truncated cone cavity is connected with the circular hollow cover on the inflatable cavity. 3. The airtight wall performance test device for utilization of compressed air energy storage in abandoned shaft and roadway space according to claim 1, characterized in that, a base is arranged below the box and fixed by bolts, concrete is poured into the box, and the concrete and The water-filled cavity, the gas-filled cavity, and the truncated cone cavity jointly simulate the surrounding rock. 4. The airtight wall performance test device for utilization of compressed gas energy storage in abandoned shaft and roadway space according to claim 1, wherein a stress sensor is arranged in the truncated cone cavity, and the stress sensor monitors the stress change in the airtight wall , the wall surface of the inverted truncated cone airtight wall is provided with a displacement sensor, and the displacement sensor monitors the displacement change in the airtight wall. 5. The airtight wall performance test device for utilization of compressed air energy storage in abandoned shaft and roadway space according to claim 1, wherein the water supply pipeline includes a water pump, a water tank, a water guide pipe and a water pressure gauge, and the water pump passes through the guide pipe. The water pipe draws water from the water tank, the water guide pipe is connected to the water hole on the water filling cavity, and the water guide pipe is also provided with a water pressure gauge. 6. The airtight wall performance test device for utilization of compressed air energy storage in abandoned shaft and lane space according to claim 1, characterized in that, the air pressure hole of the inflatable cavity is connected with an air guide tube, and the air guide tube is connected to the gas storage through an air pump device, the air guide tube is also provided with a barometer. 7. The airtight wall performance test device for utilization of compressed gas energy storage in abandoned shaft and roadway space according to claim 1, wherein the loading system includes an upper loading mechanism, an upper pressing plate, a first lateral loading mechanism, a second The one lateral pressing plate, the second lateral loading mechanism, the second lateral pressing plate, the upper pressing plate, the first lateral pressing plate and the second lateral pressing plate apply pressure to the simulated surrounding rock. 8. A method for testing the performance of an airtight wall for utilization of compressed gas energy storage in abandoned wells and lanes, using the airtight wall performance test device for utilization of compressed air energy storage in abandoned wells and lanes according to any one of claims 1 to 7, characterized in That is, the steps include: S1. Apply mold release oil in the box, and install water-filled cavity, air-filled cavity and truncated cone cavity in combination; S2. Make the airtight wall, take out the airtight wall as a whole from the box after solidification, arrange the displacement sensor, install the water pressure sealing cover and the air pressure sealing cover; S3. Place the test concrete material on the support frame, and inject water into the water-filled cavity, and simulate the air in the roadway to be discharged from the vent hole; S4. Inject gas into the inflatable cavity, and apply the overlying surrounding rock pressure and lateral surrounding rock pressure through the loading system simulation; S5. Monitor the pressure in the inflatable cavity through the pressure relief hole, and then inject gas into the inflatable cavity again to simulate the cycle process of compressing and deflated; S6. Monitor the liquid in the water-filled cavity to judge the airtightness of the airtight wall, drill holes in the airtight wall and observe the development of cracks through a micro-camera, judge the penetration of the liquid by adding iodine solution in the liquid, and perform mechanical testing by drilling cores. Performance Testing. 9. A method for testing the performance of a closed wall using compressed gas energy storage in an abandoned well and roadway space according to claim 8, characterized in that the water pressure in the water-filled cavity, the air pressure in the inflatable cavity and the load applied by the loading system are changed size, to monitor the performance of the containment wall under different conditions. 10. A performance test method for airtight walls utilizing compressed gas energy storage in abandoned wells and roadways according to claim 8, characterized in that the installation and combination of the truncated cone cavity is adjusted to detect the influence of different heights and cross-sectional areas on the performance of the airtight walls .

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