CN115452256A - Device and method for testing performance of airtight wall for space compressed air energy storage utilization of abandoned roadway - Google Patents
Device and method for testing performance of airtight wall for space compressed air energy storage utilization of abandoned roadway Download PDFInfo
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- CN115452256A CN115452256A CN202210930845.5A CN202210930845A CN115452256A CN 115452256 A CN115452256 A CN 115452256A CN 202210930845 A CN202210930845 A CN 202210930845A CN 115452256 A CN115452256 A CN 115452256A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0254—Biaxial, the forces being applied along two normal axes of the specimen
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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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
Technical Field
The invention relates to the technical field of rock mechanics testing devices, and particularly provides a device and a method for testing performance of a sealing wall for space compressed air energy storage utilization of a waste roadway.
Background
The compressed air energy storage by utilizing the abandoned mine becomes an effective means for adjusting the power supply and recycling the abandoned mine. Compared with the common sealing wall, the sealing wall for the compressed gas energy storage mine bears the soaking and pressure of the mine water and the pressure of the compressed gas, and the performance of the sealing wall has obvious influence on the engineering effect.
When the wall body of the underground mine sealing wall needs to bear larger pressure, a truncated cone-shaped structure is selected, the performance of the sealing wall is the key point of research, and in the prior art, chinese patent (CN 204613207U) discloses a similar simulation test device for a concrete anti-impact sealing wall, which is used for similar simulation of the underground goaf concrete permanent sealing wall and detection of the pressure and displacement of the sealing wall when the sealing wall is impacted; the technology does not consider the structural shape of a wall body specified by the national standard, cannot influence the sealing property and the stability of the wall body by the shape of the wall body, cannot detect the performance change of the wall body under the action of mine water, and is not suitable for wall body detection of the sealing wall with the functions of water prevention and air blocking. Chinese patent (CN 205246290U) discloses a test device for detecting the sealing property of a sealing wall, which can effectively detect the blocking property of a sealing material by detecting the gas concentration and judging the sealing property of the sealing wall made of different materials; the technology is suitable for detecting the airtightness of a rectangular wall body with a fixed shape under normal pressure, and is also not suitable for detecting the wall body of a closed wall with waterproof and air-blocking functions.
The sealing walls made of different materials have different sealing performance on gas and water, and have different compression resistance and erosion resistance, and if the sealing walls have poor performance, compressed air can overflow and mine water can flow into the sealing walls, so that the compressed air energy storage system can be out of action. The performance test of the sealing wall is very important, but the prior art cannot be used for testing the performance of the sealing wall under the action of high water pressure and high air pressure.
Disclosure of Invention
The invention provides a device and a method for testing the performance of a sealing wall by utilizing waste roadway space compressed air energy storage, and the device and the method have the following specific technical scheme, in order to detect the tightness, stress, displacement and other conditions of the sealing wall under the action of different water pressures, air pressures and surrounding rock pressures and facilitate the performance test of the sealing wall.
A performance testing device for a sealing wall for space compressed air energy storage utilization of a waste roadway comprises a box body, a water pressure sealing cover, a gas pressure sealing cover, a water filling cavity, a gas filling cavity, a truncated cone cavity, a water supply pipeline, a loading system and a monitoring device, wherein concrete is poured in the box body, and the upper bottoms of two ends of the truncated cone cavity are respectively connected with the water filling cavity and the gas filling cavity; the water supply pipeline is connected with the water filling cavity, the air pump is connected with the air filling cavity, the water pressure sealing cover is arranged at the end part of the water filling cavity, and the air pressure sealing cover is arranged at the end part of the air filling cavity; the loading system simulates the pressure of overlying surrounding rocks and lateral surrounding rocks, and the monitoring device determines the stress and displacement changes in the closed wall.
Preferably, the truncated cone cavities comprise 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 and a sixth truncated cone cavity, and are connected in sequence through threads; the upper bottom of the first truncated cone cavity is connected with the circular hollow cover of the water filling cavity, and the upper bottom of the sixth truncated cone cavity is connected with the circular hollow cover on the air filling cavity.
Preferably, the base is arranged below the box body and fixed through bolts, concrete is poured into the box body, and the concrete, the water-filled cavity, the air-filled cavity and the truncated cone cavity simulate surrounding rock together.
Preferably, a stress sensor is arranged in the truncated cone cavity and used for monitoring the stress change in the closed wall, and a displacement sensor is arranged on the wall surface of the inverted truncated cone closed wall and used for monitoring the displacement change in the closed wall.
Preferably, the water supply pipeline comprises a water pump, a water tank, a water guide pipe and a water pressure meter, the water pump pumps water from the water tank through the water guide pipe, the water guide pipe is connected with a water through hole in the water filling cavity, and the water guide pipe is further provided with the water pressure meter.
Still preferably, the hole of calming anger of inflating the cavity is connected with the air duct, and the air duct passes through the air pump and connects gas storage device, still be provided with the barometer on the air duct.
It is also preferred that the loading system includes an upper loading mechanism, an upper platen, a first lateral loading mechanism, a first lateral platen, a second lateral loading mechanism, a second lateral platen, the upper platen, the first lateral platen and the second lateral platen applying pressure to the simulated wall rock.
A performance test method for a sealing wall utilizing waste roadway space compressed air energy storage utilizes the performance test device for the sealing wall utilizing the waste roadway space compressed air energy storage, and comprises the following steps:
s1, coating demolding oil in a box body, and assembling a water filling cavity, an air filling cavity and a truncated cone cavity;
s2, manufacturing a sealed wall, taking out the whole sealed wall from the box body after solidification, arranging a displacement sensor, and installing a water pressure sealing cover and an air pressure sealing cover;
s3, placing the test concrete material on a support frame, injecting water into the water filling cavity, and simulating air in the roadway to be discharged from the vent hole;
s4, injecting gas into the inflatable cavity, and simulating and applying overlying surrounding rock pressure and lateral surrounding rock pressure through a loading system;
s5, monitoring the pressure in the inflatable cavity through pressure relief of the pressure relief hole, and then injecting gas into the inflatable cavity again to simulate the cycle process of gas injection and gas release;
s6, monitoring the liquid in the water filling cavity to judge the tightness of the sealing wall, drilling the sealing wall, observing crack development through a micro-camera, judging the permeation condition of the liquid by adding iodine liquid into the liquid, and performing mechanical property test through drilling and coring.
Further preferably, the water pressure in the water filling cavity, the air pressure in the air filling cavity and the load applied by the loading system are changed, and the performance of the airtight wall under different conditions is monitored.
Further preferably, the influence of different heights and sectional areas on the performance of the airtight wall is detected by adjusting the installation combination mode of the truncated cone cavity.
The device and the method for testing the performance of the airtight wall by utilizing the space compressed air energy storage of the abandoned roadway have the advantages that the device can detect and analyze the airtightness, stress, displacement and damage conditions of the airtight wall under the action of different water pressures, air pressures and confining pressures, the research on the performance of the airtight wall is facilitated, and in addition, inverted truncated conical walls with different diameters and heights can be combined according to the requirements, so that the condition of the underground wall body can be simulated more truly and effectively; the performance test of the sealing wall ensures the development of compressed air energy storage utilization of the waste gas mine and improves the safety and reliability of the waste gas mine.
Drawings
FIG. 1 is a schematic structural diagram of a device for testing the performance of a sealing wall by utilizing space compressed air energy storage of a waste roadway
FIG. 2 is a side sectional view of the apparatus for testing the performance of the enclosure wall;
FIG. 3 is a schematic view of a bottom plate structure;
FIG. 4 is a schematic view of the structure and arrangement of the sealing cover;
FIG. 5 is a schematic diagram of a cavity structure of a simulation roadway;
FIG. 6 is an exploded view of a truncated cone cavity configuration;
FIG. 7 is a schematic view of the chamber assembly;
FIG. 8 is a schematic illustration of concrete placement;
FIG. 9 is a schematic diagram of a sensor arrangement of the enclosure wall;
FIG. 10 is a schematic view of the pouring of the enclosure wall;
in the figure: 1-box, 2-bottom plate, 3-hydraulic pressure sealing cover, 4-pneumatic pressure sealing cover, 5-water filling cavity, 6-round hollow cover, 7-air filling cavity, 8-round hollow cover, 9-first truncated cone cavity, 10-second truncated cone cavity, 11-first cylinder cavity, 12-third truncated cone cavity, 13-fourth truncated cone cavity, 14-second cylinder cavity, 15-fifth truncated cone cavity, 16-sixth truncated cone cavity, 17-water through hole, 18-air through hole, 19-pressure air hole, 20-pressure relief hole, 21-water pump, 22-water tank, 23-water guide pipe, 24-water pressure gauge, 25-air pressure gauge, 26-first valve, 27-air pump, 28-air storage device, 29-air guide pipe, 30-pneumatic pressure gauge, 31-second valve, 32-base, 33-support frame, 34-upper loading mechanism, 35-upper pressure plate, 36-first lateral loading mechanism, 37-first lateral pressure plate, 38-second lateral pressure plate, 39-second lateral pressure plate, 40-air pressure plate, 43-mica wall displacement sensor, 43-displacement sensor, 45-mica stress sensor, and displacement sensor.
Detailed Description
With reference to fig. 1 to 10, a description will be given of a specific embodiment of a device and a method for testing the performance of a sealing wall for waste roadway space compressed air energy storage utilization according to the present invention.
The device can detect and analyze the tightness, stress, displacement and damage conditions of the airtight wall under the action of different water pressures, air pressures and confining pressures, facilitates the research on the performance of the airtight wall, can combine inverted truncated conical walls with different diameters and heights as required, and can simulate the underground wall condition more truly and effectively.
The device's structure specifically includes box 1, the sealed lid of water pressure 3, the sealed lid of atmospheric pressure 4, the cavity 5 that fills water, aerify the cavity 7, the truncated cone chamber, the supply channel, loading system and monitoring devices, the box is used for making the simulation sealed wall, the sealed lid of water pressure and the sealed lid cooperation of atmospheric pressure fill water cavity and aerify cavity simulation tunnel, truncated cone chamber and the cavity that fills water, it forms the cavity combination to aerify the cavity combination, the supply channel can provide the water yield and the water pressure of settlement, loading system simulation country rock stress, monitoring devices can monitor the stress and the displacement of sealed wall. Concrete 40 can be poured into the box body 1, and the upper bottoms of the two 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 filling cavity body 5, one end of the water filling cavity body 5 is provided with a circular hollow cover, the edge is further provided with threads, the whole body can be in a cuboid shape, the air pump 27 is connected with an air filling cavity body, one end of the air filling cavity body 7 is provided with a circular hollow cover, the edge is further provided with threads, and the whole body can be in a cuboid shape. The hydraulic pressure sealing cover 3 is arranged at the end part of the water filling cavity 5, one surface of the hydraulic pressure sealing cover 3 is a rubber pad, the other surface is made of rigid material, and a water through hole 17 is formed at the position close to the lower edge; the air pressure sealing cover 4 is arranged at the end part of the air inflation cavity, one side of the air pressure sealing cover 4 is a rubber pad, the other side of the air pressure sealing cover 4 is a rigid material, an air pressure hole is formed in the center of the air pressure sealing cover 4, and a pressure relief hole 20 is formed in the position close to the air pressure hole 19. The loading system simulates the pressure of the overlying surrounding rock and the lateral surrounding rock, and the monitoring device determines the stress and displacement change in the closed wall.
The truncated cone cavities comprise 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, a fifth truncated cone cavity 15 and a sixth truncated cone cavity 16, and are connected in sequence through threads, so that an inverted truncated cone wall cavity can be formed. The inner sides of the upper bottom and the lower bottom of the first truncated cone cavity 9 are provided with threads, and the upper bottom of the first truncated cone cavity 9 is connected with the circular hollow cover of the water filling cavity 5; the upper bottom inner side and the lower bottom outer side of the second truncated cone cavity 10 are provided with threads, the outer sides of two ends of the first cylindrical cavity are provided with threads, the inner sides of the upper bottom and the lower bottom of the third truncated cone cavity 12 are provided with threads, the inner sides of the upper bottom and the lower bottom of the fourth truncated cone cavity 13 are provided with threads, the outer sides of two ends of the second cylindrical cavity 14 are provided with threads, the inner sides of the upper bottom and the lower bottom of the fifth truncated cone cavity 15 are provided with threads, the inner sides of the upper bottom and the lower bottom of the sixth truncated cone cavity 16 are provided with threads, and the upper bottom of the sixth truncated cone cavity 16 is connected with a circular hollow cover on the inflatable cavity to form a cavity combination. The truncated cone cavities with different heights and different upper and lower bottom diameters are combined, and the inverted truncated cone structure sealing walls with different shapes can be obtained by pouring sealing wall materials.
And a stress sensor 44 is arranged on the inner side surface of the truncated cone cavity, monitors the stress change in the airtight wall and monitors the stress change of each point of the airtight wall in real time in the test process. And a displacement sensor 45 is arranged on the wall surface of the inverted truncated cone sealing wall and monitors the displacement change in the sealing wall.
The lower part of the box body 1 is provided with a base which is fixed by bolts, concrete 40 is poured into the box body 1, and the concrete, the water-filled cavity, the air-filled cavity and the truncated cone cavity simulate surrounding rock together. Demoulding oil can be smeared in the box body 1, the cavity combination is fixed on the base 32, then the box body 1 is erected by taking the base as the bottom, concrete materials are poured between the cavity combination and the box body, and the concrete and the cavity simulate surrounding rocks together.
The water supply pipeline comprises a water pump 21, a water tank 22, a water guide pipe 23 and a water pressure meter 24, the water pump 21 pumps water from the water tank 22 through the water guide pipe 23, the water guide pipe 23 is connected with a water through hole in the water filling cavity, and the water guide pipe 23 is further provided with the water pressure meter 24. The air compressing hole of the air compressing cavity 7 is connected with an air duct 29, the air duct 29 is connected with an air storage device through an air pump, and a barometer 30 is further arranged on the air duct 29.
The 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 and a second lateral pressing plate 39, wherein the upper pressing plate 35, the first lateral pressing plate 37 and the second lateral pressing plate 39 respectively 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.
A method for testing the performance of a sealing wall for spatial compressed air energy storage utilization of a waste roadway comprises the following steps:
s1, coating demolding oil in a box body, and assembling a water filling cavity, an air filling cavity and a truncated cone cavity.
And S2, manufacturing the airtight wall, taking out the whole airtight wall from the box body after the concrete is solidified, arranging a displacement sensor, and installing a water pressure sealing cover and an air pressure sealing cover.
Fixing a base on a box body through bolts, brushing a layer of demolding oil in the box body to fix a cavity combination on the base, erecting the box body with the base and the cavity combination fixed on the base, pouring a concrete material between the cavity combination and the box body, and simulating surrounding rock by the concrete and the cavity together. And pouring river sand into the cavity combination, stopping when the river sand is parallel to the water filling cavity, paving a layer of mica on the river sand, injecting a sealing wall material into the combined cavity, and stopping when the sealing wall material is parallel to the upper bottom of the sixth truncated cone cavity.
After the concrete material and the airtight wall material are solidified, the base is taken down, river sand in the water filling cavity is poured out, the solidified concrete material, the internal cavity and the airtight wall body are taken out from the box body, a displacement sensor is arranged on the wall surface of the inverted truncated cone airtight wall, a water pressure sealing cover is fixed at the tail end of the water filling cavity, and an air pressure sealing cover is fixed at the tail end of the air filling cavity. And fixing the concrete material, the inner cavity, the wall body of the airtight wall and the sealing cover on the support frame.
And S3, placing the test concrete material on the support frame, injecting water into the water filling cavity, and simulating the discharge of air in the roadway from the vent hole.
The water pump injects liquid in the water tank into the water filling cavity through the water guide pipe and the water through hole, the water guide pipe is provided with the water pressure gauge, water pressure can be monitored, when water is injected into the water filling cavity, air in a simulation roadway is discharged through the air through hole, and the first valve is closed after gas is discharged.
And S4, injecting gas into the gas-filled cavity, and simulating and applying overlying surrounding rock pressure and lateral surrounding rock pressure through a loading system.
The air pump presses the air in the air storage device into the air inflation cavity through the air guide pipe and the air pressure hole, and the air guide pipe is provided with a barometer which can monitor the air pressure. The upper loading system and the upper pressing plate are used for simulating the pressure of the overlying surrounding rock, and the first lateral loading system, the first lateral pressing plate, the second lateral loading system and the second lateral pressing plate are used for simulating the pressure of the lateral surrounding rock. And monitoring and analyzing the stress displacement change condition of the wall body by using the stress sensor and the displacement sensor.
And S5, monitoring the pressure intensity in the inflation cavity through pressure relief of the pressure relief hole, and then injecting gas into the inflation cavity again to simulate the cycle process of gas compression and gas release.
The second valve is opened, pressure relief is carried out through the pressure relief hole, the air pressure in the inflation roadway can be monitored by the barometer, after pressure relief, air in the air storage device is pressed into the cavity of the inflation roadway through the air guide pipe by the air pump after pressure relief, cyclic pressurization and pressure relief can be carried out, and the cyclic air compression and air relief condition in the air compression energy storage process can be simulated. And simulating inflation and deflation time according to the time ratio of the peak electricity utilization period to the valley electricity utilization period in the area of the simulated compressed air energy storage mine in one day.
And S6, monitoring the liquid in the water filling cavity to judge the tightness of the sealing wall, drilling the sealing wall, observing crack development through a micro-camera, judging the permeation condition of the liquid by adding iodine liquid into the liquid, and performing mechanical property test by drilling and coring.
When the gas filled into the gas filling cavity can react with water, the liquid in the water filling roadway can be discharged through the water guide pipe, the ion concentration in the liquid is detected, whether the air leakage occurs in the sealing wall is judged, and then the sealing performance is judged.
After filling water, inflating and pressurizing for a certain time, drilling the inverted truncated cone airtight wall, and inserting a miniature camera into the hole to observe the growth condition of cracks in the wall. When starch is doped into the material of the airtight wall, and the liquid injected into the water filling cavity is added with iodine solution, whether the color inside the wall body turns blue or not can be observed through the camera, and the soaking condition of water to the airtight wall can be judged according to the range of the color turning blue. And when the charged water reaches the pressure (such as 6 MPa) required by the test, stopping continuously charging the water, simulating the charging and discharging time according to the time ratio of the peak time period and the valley time period of the electricity consumption in the area where the compressed air energy storage mine is located in one day, continuously pressurizing in the test stage to simulate the pressure of surrounding rocks, and determining the total duration of the test according to the requirement.
After filling water, inflating and pressurizing for a certain time, partial test blocks of the sealing wall material can be taken out in a drilling and coring mode to perform mechanical property test, test pieces with the same volume and prepared by the same sealing wall material are subjected to mechanical property test, and the influence of the action of water pressure and air pressure on the mechanical property of the sealing wall is comparatively analyzed.
In addition, the types and the proportions of the materials of the sealing wall are changed, and the performance of the sealing wall made of different materials can be detected through a plurality of groups of tests.
The water pressure in the water filling cavity, the air pressure in the air filling cavity and the load applied by the loading system can be changed, and the performance of the sealing wall under different conditions can be monitored. For example, the water pressure value is changed in multiple tests, and the water pressure value is used for simulating the action of mine water with different pressures on the sealing wall; the air pressure is changed in a plurality of experiments, and the method is used for simulating the influence of air with different compression degrees on the airtight wall in the air pressure energy storage project; and the load of the loading system is changed in a plurality of tests, so that the influence of different surrounding rock pressures on the airtight wall is simulated.
The influence of different heights and sectional areas on the performance of the airtight wall is detected by adjusting the installation and combination mode of the truncated cone cavity. The combination mode of the truncated cone cavity and the cylindrical cavity is changed, inverted truncated cone cavities with different heights and cross-sectional areas can be obtained, and the performance of the inverted truncated cone airtight wall with different heights and cross-sectional areas is detected through a plurality of groups of tests.
The method can simulate and detect the sealing performance and performance change conditions of the sealing wall under multiple actions of water pressure and air pressure surrounding rock pressure, can also form the walls with different heights, diameters and truncated cone numbers by different truncated cone combinations, and further test the sealing performance, stress and displacement conditions of the walls in different shapes by tests; the material of the wall can be changed, and the performance of the airtight wall made of different materials can be tested; detecting the internal stress condition of the wall and the displacement condition of the wall; the tightness of the wall against gas and the resistance to water penetration were measured. The method ensures the development of compressed air energy storage utilization of the waste gas mine through the performance test of the closed wall and improves the safety and reliability of the waste gas mine.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (10)
1. The performance testing device for the airtight wall for spatial compressed air energy storage utilization of the abandoned roadway is characterized by comprising a box body, a hydraulic pressure sealing cover, a pneumatic pressure sealing cover, a water filling cavity, an air filling cavity, a truncated cone cavity, a water supply pipeline, a loading system and a monitoring device, wherein concrete is poured in the box body, and the upper bottoms of two ends of the truncated cone cavity are respectively connected with the water filling cavity and the air filling cavity; the water supply pipeline is connected with the water filling cavity, the air pump is connected with the air filling cavity, the water pressure sealing cover is arranged at the end part of the water filling cavity, and the air pressure sealing cover is arranged at the end part of the air filling cavity; the loading system simulates the pressure of overlying surrounding rocks and lateral surrounding rocks, and the monitoring device determines the stress and displacement changes in the closed wall.
2. The device for testing the performance of the sealing wall for waste roadway space air compression and energy storage utilization according to claim 1, wherein the truncated cone cavities comprise 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 and a sixth truncated cone cavity which are sequentially connected through threads; the upper bottom of the first truncated cone cavity is connected with the circular hollow cover of the water filling cavity, and the upper bottom of the sixth truncated cone cavity is connected with the circular hollow cover on the air filling cavity.
3. The device for testing the performance of the sealing wall for waste roadway space air compression and energy storage utilization according to claim 1, wherein a base is arranged below the box body and fixed through bolts, concrete is poured into the box body, and the concrete, the water filling cavity, the air filling cavity and the truncated cone cavity jointly simulate surrounding rock.
4. The device for testing the performance of the airtight wall for waste roadway space air compression and energy storage utilization according to claim 1, wherein a stress sensor is arranged in the truncated cone cavity and used for monitoring the change of stress in the airtight wall, and a displacement sensor is arranged on the wall surface of the inverted truncated cone airtight wall and used for monitoring the change of displacement in the airtight wall.
5. The device for testing the performance of the airtight wall for waste roadway space compressed air energy storage utilization according to claim 1, wherein the water supply pipeline comprises a water pump, a water tank, a water conduit and a water pressure gauge, the water pump pumps water from the water tank through the water conduit, the water conduit is connected with a water through hole on the water filling cavity, and the water conduit is further provided with the water pressure gauge.
6. The device for testing the performance of the sealing wall for waste roadway space compressed air energy storage utilization according to claim 1, wherein the air compressing hole of the air compressing cavity is connected with an air duct, the air duct is connected with an air storage device through an air pump, and the air duct is further provided with an air pressure gauge.
7. The device for testing the performance of the sealing wall for waste roadway space compressed air energy storage utilization according to claim 1, wherein the loading system comprises an upper loading mechanism, an upper pressing plate, a first lateral loading mechanism, a first lateral pressing plate, a second lateral loading mechanism and a second lateral pressing plate, and the upper pressing plate, the first lateral pressing plate and the second lateral pressing plate apply pressure to the simulated surrounding rock.
8. A performance test method for a sealing wall for waste roadway space air compression and energy storage utilization is provided, and the performance test device for the sealing wall for waste roadway space air compression and energy storage utilization, which is disclosed by any one of claims 1 to 7, is characterized by comprising the following steps of:
s1, coating demolding oil in a box body, and assembling a water-filled cavity, an air-filled cavity and a truncated cone cavity;
s2, manufacturing a sealing wall, taking out the whole sealing wall from the box body after solidification, arranging a displacement sensor, and installing a water pressure sealing cover and an air pressure sealing cover;
s3, placing a test concrete material on the support frame, injecting water into the water filling cavity, and simulating air in the roadway to be discharged from the vent hole;
s4, injecting gas into the gas-filled cavity, and simulating and applying overlying surrounding rock pressure and lateral surrounding rock pressure through a loading system;
s5, monitoring the pressure intensity in the inflation cavity through pressure relief of the pressure relief hole, and then injecting gas into the inflation cavity again to simulate the cycle process of gas compression and gas release;
s6, monitoring the liquid in the water filling cavity to judge the tightness of the sealing wall, drilling the sealing wall, observing crack development through a micro-camera, judging the permeation condition of the liquid by adding iodine liquid into the liquid, and performing mechanical property test through drilling and coring.
9. The method for testing the performance of the airtight wall for waste roadway space air compression and energy storage utilization as claimed in claim 8, wherein the performance of the airtight wall under different conditions is monitored by changing the water pressure in the water-filled cavity, the air pressure in the air-filled cavity and the load applied by the loading system.
10. The method for testing the performance of the airtight wall for waste roadway space compressed air energy storage utilization according to claim 8, wherein the influence of different heights and sectional areas on the performance of the airtight wall is detected by adjusting the installation combination mode of the truncated cone cavity.
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