Test system for simulating stability of compressed air energy storage chamber

Abstract

The invention relates to the technical field of compressed air energy storage, and discloses a test system for simulating the stability of a compressed air energy storage chamber, which is characterized in that a ground stress simulation module and a high-pressure air loading control module respectively receive instructions of a multi-working-condition simulation control module and apply geological load and high-pressure gas to a chamber structure simulation module; meanwhile, corresponding real-time data are fed back; the chamber structure simulation module generates mechanical response and outputs data to the multi-field coupling data monitoring module; the monitoring module collects multi-field data, processes the data and then synchronously transmits the data to the multi-working-condition simulation control module and the stability evaluation module; the multi-working-condition simulation control module is combined with monitoring data and optimization feedback and issues an instruction to realize closed-loop regulation and control; and the stability evaluation module quantifies the stability of the chamber, generates a report and feeds back optimization suggestions to the multi-working-condition simulation control module. The method is suitable for various geologic bodies, the mechanical response of the chamber structure under the complex working condition is reproduced, the stability evolution law is captured, and data support is provided for design optimization of an air energy storage power station.

Description

Technical Field

[0001] This invention relates to the field of compressed air energy storage technology, and in particular to a test system for simulating the stability of compressed air energy storage chambers. Background Technology

[0002] Against the backdrop of the global push for energy transition and sustainable development, energy storage technology is playing an increasingly important role as a key support for balancing energy supply and demand, improving energy efficiency, and ensuring the stability of energy systems. Compressed air energy storage, as a highly promising large-scale physical energy storage technology, occupies a pivotal position in the entire energy sector, and chamber-type compressed air energy storage power plants represent one of the important development directions for compressed air energy storage.

[0003] Cavern-type compressed air energy storage power stations utilize underground artificial caverns as gas storage tanks, are not limited by water sources or terrain, and are adaptable to various geographical environments. Their site selection flexibility and resource adaptability are outstanding. Compared to energy storage models that rely on natural salt caverns, cavern-type power stations overcome geological limitations through artificial excavation technology, allowing construction in various hard rock formations. This characteristic makes them highly competitive in specific areas where salt cavern resources are scarce. In such areas, most ongoing and planned projects adopt artificial cavern solutions, and the adoption rate of this solution is also relatively high nationwide. Furthermore, cavern-type power stations can be located near wind power and photovoltaic bases, reducing transmission losses and improving grid peak-shaving efficiency.

[0004] In terms of safety performance and structural stability, the chamber-type compressed air energy storage power station performs excellently. The underground rock mass forms a natural "pressure protection shell" that can effectively resist the high-pressure load of compressed air. Currently, advanced projects have achieved stable operation at higher pressure levels, far exceeding the industry's upper limit for traditional pressure. In addition, the structure buried deep underground is far away from people on the surface. Combined with the sealing characteristics of the rock mass itself, it greatly reduces the risk of gas leakage and explosion. Compared with surface storage tanks, its safety is significantly improved.

[0005] However, existing chamber-type compressed air energy storage technology still has significant shortcomings: On the one hand, the initial construction costs and time are both high. Artificial chambers require complex procedures such as precise surveying, blasting excavation, and reinforcement sealing. The construction difficulty increases significantly in areas with complex geological conditions, resulting in high initial investment. On the other hand, high-pressure sealing and rock mass stabilization technologies are quite challenging. As the pressure level increases, the risks of gas leakage and rock mass instability increase significantly. Previously, global technology was long constrained by traditional pressure limits, with the core bottleneck being the easy aging of sealing materials and the tendency for rock mass to develop fissures under high-pressure environments. Although some technologies have achieved breakthroughs in sealing technology for higher pressure levels, the long-term durability of rigid-flexible composite sealing systems still needs further verification. Moreover, the technical complexity of full-domain temperature field monitoring and stress-strain control is extremely high, severely restricting the large-scale promotion and application of chamber-type compressed air energy storage technology. Summary of the Invention

[0006] This invention provides a test system for simulating the stability of compressed air energy storage chambers. Through the coordinated operation of multiple modules, it can adapt to various geological formations, reproduce the mechanical response of the chamber structure under complex working conditions, and capture the stability evolution law, providing reliable data support for the design optimization of chamber-type compressed air energy storage power stations.

[0007] This invention provides a test system for simulating the stability of a compressed air energy storage chamber, comprising a ground stress simulation module, a high-pressure air loading control module, a chamber structure simulation module, a multi-field coupling data monitoring module, a multi-condition simulation control module, and a stability evaluation module. The ground stress simulation module is connected to the chamber structure simulation module, which is also connected to the high-pressure air loading control module and the multi-field coupling data monitoring module. The high-pressure air loading control module is connected to the multi-condition simulation control module, which is also connected to the ground stress simulation module, the multi-field coupling data monitoring module, and the stability evaluation module. The stability evaluation module is further connected to the multi-field coupling data monitoring module. The geostress simulation module is used to receive the loading command from the multi-condition simulation control module, apply uniform geological load to the chamber structure simulation module, and simultaneously feed back real-time geostress data to the multi-condition simulation control module. The high-pressure air loading control module is used to receive pressure control commands from the multi-condition simulation control module, deliver high-pressure gas to the chamber structure simulation module, and simultaneously feed back pipeline and chamber pressure data to the multi-condition simulation control module. The chamber structure simulation module is used to receive uniform geological loads from the geostress simulation module and high-pressure gas from the high-pressure air loading control module to generate a structural mechanical response and output effect data, including stress and deformation, to the multi-field coupled data monitoring module. The multi-field coupled data monitoring module collects multi-field data from the chamber structure simulation module, processes it, and then synchronously transmits it to the multi-condition simulation control module and the stability evaluation module; wherein, the multi-field data includes stress, strain, displacement, temperature, and gas leakage. The multi-condition simulation control module is used to receive monitoring data from the multi-field coupling data monitoring module and optimization feedback from the stability evaluation module, and to issue condition control commands to the geostress simulation module and the high-pressure air loading control module to achieve closed-loop control of the test process. The stability evaluation module is used to receive multi-field data from the multi-field coupling data monitoring module to quantify the stability level of the chamber and generate an evaluation report, while feeding back optimization suggestions to the multi-condition simulation control module.

[0008] Furthermore, the geostress simulation module includes an electro-hydraulic servo large true triaxial loading platform, a hydraulic pump station, a sample fixing device, a pressure sensor, a displacement sensor, and a signal conditioning unit; The loading actuator of the electro-hydraulic servo large true triaxial loading platform is connected to the sample fixing device. The power input end of the loading actuator is connected to the hydraulic pump station via a high-pressure oil pipe. The control signal input end of the hydraulic pump station is connected to the multi-condition simulation control module. Pressure sensors and displacement sensors are integrated on the electro-hydraulic servo large true triaxial loading platform and are connected to the signal conditioning unit via signal lines. The output end of the signal conditioning unit is connected to the multi-condition simulation control module to realize real-time transmission of ground stress loading data. The inner wall of the sample fixing device is in close contact with the surrounding rock sample of the chamber structure simulation module. The surrounding rock sample of the chamber structure simulation module is placed in the sample fixing device. It receives the in-situ stress parameter instructions, including target pressure, loading rate, and lateral pressure coefficient, issued by the multi-condition simulation control module. The hydraulic pump station delivers hydraulic power to the hydraulic cylinder of the electro-hydraulic servo large true triaxial loading platform, and applies in-situ stress in stages according to preset parameters to realize the simulation of stress state dominated by hydrostatic pressure or horizontal tectonic stress. During the loading process, the pressure sensor and displacement sensor synchronously collect the actual loading pressure and sample displacement data. After preprocessing by the signal conditioning unit, the data is transmitted to the multi-condition simulation control module, which compares the collected data with the target parameters and adjusts the output of the hydraulic pump station through feedback instructions to control the pressure fluctuation within the set range. After reaching the target in-situ stress, it enters a stable load holding state until the end of the test condition. If the pressure sensor and displacement sensor detect pressure overshoot or displacement abnormality, the abnormal signal is fed back to the multi-condition simulation control module in real time and triggers the loading stop command.

[0009] Furthermore, the high-pressure air loading control module includes a power source unit, a pressure buffer unit, a pressure monitoring unit, a control unit, and a high-pressure transmission unit. The power source unit is an air compressor, the pressure buffer unit is a high-pressure air tank, and the pressure monitoring unit consists of a high-precision pressure sensor, a data acquisition instrument, and a data transmission subunit. The control unit is controlled by a PLC and has multiple preset pressure control curves. The high-pressure transmission unit uses stainless steel pipes and is equipped with a proportional pressure valve, a shut-off valve, and a leakage detection device. The air compressor exhaust port is connected to the high-pressure gas tank inlet via a high-pressure pipeline consisting of a series shut-off valve and a check valve. The high-pressure gas tank outlet is connected to a proportional pressure valve via a high-pressure pipeline. The output of the proportional pressure valve extends through the high-pressure pipeline to the sealing layer inlet of the chamber structure simulation module. A pressure sensor is installed on the pipeline between the gas tank outlet and the sealing layer inlet, and its signal output is connected to a data acquisition instrument. The data acquisition instrument is connected to a control unit, which is linked to the compressor start / stop terminal, the proportional pressure valve adjustment terminal, and the leak detection device signal terminal. The control unit receives operating condition commands from the multi-condition simulation control module, starts the air compressor, compresses the air to the target pressure, and stores it in the high-pressure gas tank. The proportional pressure valve precisely adjusts the valve opening and closing degree to deliver high-pressure gas to the chamber sealing layer. During the delivery process, the pressure sensor collects real-time pressure data from the pipeline and the chamber. After preprocessing by the data acquisition instrument, the data is transmitted to the control unit. The control unit compares the collected data with a preset pressure curve and dynamically adjusts the compressor operating state and the proportional pressure valve opening and closing degree. At the same time, the leak detection device monitors the pipeline sealing performance in real time and feeds back to the control unit.

[0010] Furthermore, the chamber structure simulation module includes a module that simulates the composite structure of chambers corresponding to different geological bodies. The composite structure of the chamber includes a surrounding rock similar material, an inner lining structure, a slip layer, and a sealing layer. Based on similarity theory, surrounding rock similarity materials are prepared according to the target geological body type, and then an inner lining structure is made. After the inner lining is formed, talc powder is applied to the inner surface as a slip layer, and then a sealing layer is installed. Next, the surrounding rock similarity materials are poured in layers to form a surrounding rock sample and fixed on the worktable of the geostress simulation module. An elastic sealing gasket is filled between the inner wall of the sample and the sample fixing device. Finally, the air inlet of the sealing layer is connected to the high-pressure air loading control module.

[0011] Furthermore, the multi-field coupling data monitoring module monitors stress, strain, displacement, temperature, and gas leakage during the test, including a stress monitoring unit, a strain monitoring unit, a displacement monitoring unit, and a thermal-gas parameter monitoring unit; The stress monitoring unit includes surrounding rock stress monitoring and lining stress monitoring. During the layered casting of similar materials in the surrounding rock, high-precision earth pressure cells are buried at different elevations to monitor the stress distribution evolution of the surrounding rock under high pressure loading in real time. The lining stress monitoring uses miniature pressure sensors fixed at the radial midsection of the lining steel mesh. The strain monitoring unit includes surrounding rock strain monitoring and lining strain monitoring. Surround rock strain monitoring involves embedding strain bricks in similar materials to the surrounding rock to record the elastic-plastic strain evolution of the surrounding rock. Lining strain monitoring involves attaching resistance strain gauges to the outer surface of the lining to monitor axial and circumferential strain respectively, ensuring the correlation between stress and strain data. The displacement monitoring unit adopts a distributed optical fiber monitoring system, which lays optical fibers during the layered pouring of the surrounding rock to achieve synchronous monitoring of the overall displacement and local deformation of the chamber. The thermal-gas parameter monitoring unit includes temperature monitoring and gas leakage monitoring. Temperature monitoring involves placing a platinum resistance temperature sensor in the chamber to monitor the temperature changes of compressed air in real time. Gas leakage monitoring involves setting up an annular micro-gas collection channel between the surrounding rock and the sealing layer, and installing a gas flow meter to accurately monitor the gas leakage rate.

[0012] Furthermore, the multi-condition simulation control module simulates the actual operating conditions of the compressed air energy storage power station, covering the stability scenarios of different geological chambers, including the core control unit, the basic operating condition setting unit, and the geological body-specific operating condition unit; The basic operating condition setting unit includes three core operating conditions: cyclic charging and discharging, high-pressure holding, and charging and discharging rate. The parameters of these three core operating conditions can be configured by customization. The geological body-specific working condition unit sets up exclusive test conditions for the characteristics of different geological bodies, including salt rock chamber-specific working conditions, porous strata-specific working conditions, and hard rock chamber-specific working conditions. Specifically, the salt rock chamber-specific working condition adds a creep-fatigue coupling condition, extending the pressure holding time on the basis of cyclic gas filling and defilling to simulate the creep damage effect of salt rock; the porous strata-specific working condition sets a non-uniform pressure loading condition, simulating the pressure distribution differences caused by reservoir heterogeneity by adjusting the zoned pressure output of the high-pressure air loading control module; the hard rock chamber-specific working condition adds a fracture propagation monitoring condition, setting up acoustic emission sensors to determine the micro-fracture evolution process of hard rock under high pressure. The core control unit is connected to the hydraulic pump station of the ground stress simulation module and the air compressor and proportional pressure valve of the high-pressure air loading control module, respectively, to issue ground stress loading parameters and high-pressure gas charging and discharging control commands; the core control unit is connected to the data acquisition instrument of the multi-field coupled data monitoring module and the leakage detection device of the high-pressure air loading control module, to receive real-time monitoring data and abnormal alarm signals; the core control unit realizes bidirectional data interaction with the stability evaluation module, receives evaluation result feedback, and transmits test condition parameters to the stability evaluation module for report generation.

[0013] Furthermore, the stability evaluation module includes a data processing unit, a stability evaluation unit, and a result output unit; The signal input port of the data processing unit is connected to the data acquisition instrument to receive stress, strain, displacement, temperature, and leakage rate; the output of the data processing unit is connected to the input of the stability evaluation unit to transmit the filtered and fitted processed data to the evaluation unit for stability index calculation; the output of the stability evaluation unit is connected to the result output unit to generate a stability evaluation report; the feedback port of the stability evaluation unit is connected to the core control unit to convert structural optimization suggestions into experimental parameter adjustment instructions. The data processing unit uses professional data analysis software to generate pressure-strain curves, displacement-time curves, and temperature-pressure curves, and to identify key thresholds.

[0014] The stability evaluation unit is used to establish a stability evaluation system for multi-geological-body chambers, including stability evaluation of soft rock chambers, stability evaluation of salt rock chambers, stability evaluation of porous strata chambers, and stability evaluation of hard rock chambers. The results output unit is used to generate a detailed stability evaluation report, which includes test parameters, multi-field monitoring data curves, stability evaluation index scores, critical failure condition analysis, and structural optimization suggestions.

[0015] The beneficial effects of this invention are as follows: This invention integrates modules for geostress simulation, high-pressure air loading control, chamber structure simulation, multi-field coupled data monitoring, multi-condition simulation control, and stability evaluation. It can adapt to the simulation needs of chamber structures in various geological bodies, achieving accurate reproduction of the mechanical response of composite chamber structures under geological loads and high-pressure gas in actual engineering projects. By simultaneously collecting multi-dimensional key parameters through the multi-field coupled data monitoring module and combining it with the closed-loop control function of the multi-condition simulation control module, it comprehensively covers different operating conditions and geological body-specific test scenarios, effectively capturing the stability evolution law of chamber structures under complex conditions and accurately identifying key influencing factors of core indicators such as sealing performance and structural strength. Simultaneously, through a stable and reliable safety protection mechanism and a scientific stability evaluation system, it provides comprehensive and reliable test data support for the structural design optimization, sealing material selection, and operating parameter setting of chamber-type compressed air energy storage power stations. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the experimental system for simulating the stability of a compressed air energy storage chamber according to the present invention.

[0017] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0019] like Figure 1 As shown, this invention provides a test system for simulating the stability of a compressed air energy storage chamber, including a ground stress simulation module, a high-pressure air loading control module, a chamber structure simulation module, a multi-field coupling data monitoring module, a multi-condition simulation control module, and a stability evaluation module. The ground stress simulation module is connected to the chamber structure simulation module, which is connected to both the high-pressure air loading control module and the multi-field coupling data monitoring module. The high-pressure air loading control module is connected to the multi-condition simulation control module, which is connected to both the ground stress simulation module, the multi-field coupling data monitoring module, and the stability evaluation module. The stability evaluation module is also connected to the multi-field coupling data monitoring module.

[0020] The system operates as follows: The multi-condition simulation control module selects either a basic operating condition (circulating gas filling and discharging, high-pressure holding, etc.) or a geological body-specific operating condition (salt rock creep-fatigue coupling, etc.). It inputs parameters such as the target pressure range, number of cycles, and loading rate suitable for different geological bodies (soft rock / salt rock / hard rock / porous strata). After the parameters are parsed by the core control unit, control commands are sent to the hydraulic pump station of the geostress simulation module and the air compressor of the high-pressure air loading control module, respectively. The geostress simulation module applies a uniform geological load to the surrounding rock sample of the chamber structure simulation module through a three-dimensional five-sided loading actuator. The high-pressure air loading control module delivers precise high-pressure gas to the chamber sealing layer through high-pressure pipelines. The structural simulation module generates a mechanical response under dual loads. The multi-field coupled data monitoring module simultaneously collects multi-field data such as stress, strain, displacement, gas temperature, and leakage rate of the surrounding rock and lining. After preprocessing, the data is transmitted synchronously to the multi-condition simulation control module and the stability evaluation module. The multi-condition simulation control module compares the collected data with preset parameters and dynamically adjusts the output of the hydraulic pump station and the opening degree of the proportional pressure valve to achieve closed-loop control. If pressure overshoot or abnormal leakage is detected, an audible and visual alarm is immediately triggered and loading is stopped. After the preset conditions are completed, the stability evaluation module quantifies the stability of the chamber and generates a report with optimization suggestions, which is fed back to the multi-condition simulation control module to provide support for subsequent test parameter adjustments.

[0021] (1) Geostress Simulation Module The geostress simulation module is used to receive the loading command from the multi-condition simulation control module, apply uniform geological load to the chamber structure simulation module, and simultaneously feed back real-time geostress data to the multi-condition simulation control module. The geostress simulation module simulates the initial geostress environment of different geological bodies (soft rock / salt rock / hard rock / porous strata) to match the stress conditions corresponding to the actual engineering burial depth, providing a realistic geological load basis for the tunnel stability test. Specifically, it includes an electro-hydraulic servo large true triaxial loading platform, a hydraulic pump station, a sample fixing device, pressure sensors, displacement sensors, and a signal conditioning unit; The loading actuator (hydraulic cylinder) of the electro-hydraulic servo large true triaxial loading platform is mechanically connected to the sample fixing device. The power input end of the loading actuator is connected to the hydraulic pump station via a high-pressure oil pipe, and the control signal input end of the hydraulic pump station is connected to the core control unit of the multi-condition simulation control module via a cable. The pressure sensor and displacement sensor on the loading platform are connected to the signal conditioning unit via signal lines. The output end of the signal conditioning unit is connected to the data interface of the core control unit of the multi-condition simulation control module via a cable to realize the real-time transmission of ground stress loading data. The sample fixing device is fixed on the worktable of the loading platform. The inner wall of the device is in close contact with the surrounding rock sample of the chamber structure simulation module. The anti-slip and wear-resistant coating enhances the contact stability and ensures that the ground stress is uniformly transmitted to the surrounding rock sample.

[0022] A large-scale electro-hydraulic servo true triaxial loading platform is equipped with three-dimensional five-face servo loading to cover the geostress simulation needs from shallow burial (<600m) to medium-deep burial (600-2000m). Based on the burial depth characteristics of different geological bodies (optimal depth <600m for soft rock, up to 2000m for porous strata, and <1000m for hard rock), the loading platform's pressure is adjusted to preset corresponding geostress combinations: 0.3-7MPa for soft rock scenarios, 5-10MPa for salt / hard rock scenarios, and 8-15MPa for porous strata scenarios. Combined with lateral pressure coefficient adjustment, it simulates different geological stress states such as hydrostatic pressure (lateral pressure coefficient 1.0) and horizontal tectonic stress dominance (lateral pressure coefficient 0.43-0.86), adapting to the impact of regional geological structural differences on the stability of the chamber.

[0023] The specific working process is as follows: The surrounding rock sample from the chamber structure simulation module is placed into the sample fixing device. An elastic sealing gasket is filled between the surrounding rock sample and the inner wall of the device, and an anti-slip and wear-resistant coating is used to enhance contact stability and ensure uniform load transfer. The system receives in-situ stress parameter commands (including target pressure, loading rate, and lateral pressure coefficient, adaptable to soft rock / salt rock / porous strata / hard rock pressure ranges of 0.3MPa-15MPa) from the multi-condition simulation control module. The hydraulic pump station delivers hydraulic power to the three-dimensional five-sided hydraulic cylinders of the loading platform through high-pressure oil pipes, applying in-situ stress in stages according to a preset loading rate (0.01MPa / min-0.5MPa / min) to simulate a stress state dominated by hydrostatic pressure or horizontal tectonic stress. During loading, pressure and displacement sensors synchronously collect actual loading pressure and sample displacement data. After preprocessing by the signal conditioning unit, the data is transmitted to the multi-condition simulation control module. The multi-condition simulation control module compares the collected data with the target parameters and adjusts the output of the hydraulic pump station through feedback commands to keep the pressure fluctuation within ±0.01MPa. After reaching the target ground stress, it enters a stable load-holding state until the test condition ends. If the sensors detect pressure overshoot, abnormal displacement, or other conditions, the signals are fed back to the multi-condition simulation control module in real time, triggering a loading stop command to ensure test safety.

[0024] (2) High-pressure air loading control module The high-pressure air loading control module is used to receive pressure control commands from the multi-condition simulation control module, deliver high-pressure gas to the chamber structure simulation module, and simultaneously feed back pipeline and chamber pressure data to the multi-condition simulation control module. The high-pressure air loading control module simulates the high-pressure gas environment of 8MPa-20MPa during compressed air energy storage, achieving precise pressure control, stable output, and real-time adjustment during the charging and discharging process to match the actual operating conditions of an energy storage power station. Specifically, it includes a power source unit, a pressure buffer unit, a pressure monitoring unit, a control unit, and a high-pressure transmission unit. The power source unit uses a high-precision air compressor to continuously provide high-pressure air; the pressure buffer unit is a high-pressure air tank to ensure stable storage and safe protection of high-pressure air; the pressure monitoring unit consists of a high-precision pressure sensor, a data acquisition instrument, and a data transmission subunit, which can capture the dynamic changes in pressure inside the chamber in real time; the control unit uses PLC control and presets multiple pressure control curves, including a cyclic charging / discharging curve, a high-pressure holding curve, and a variable-rate charging / discharging curve; during the charging / discharging stage, the pressure is precisely adjusted at a rate of 0.1MPa / min-0.5MPa / min, and during the high-pressure holding stage (8MPa-20MPa), the pressure fluctuation is controlled within ±0.1MPa; the high-pressure transmission unit uses stainless steel pipes, which are equipped with proportional pressure valves, shut-off valves, and leakage detection devices to monitor the sealing of the pipeline system in real time, ensuring the safety and reliability of the high-pressure air transmission process.

[0025] The exhaust port of the high-precision air compressor is connected to the inlet of the high-pressure gas tank via a high-pressure pipeline consisting of a series shut-off valve and a check valve. The outlet of the high-pressure gas tank is connected to a proportional pressure valve via a high-pressure pipeline. The output end of the proportional pressure valve extends through a high-pressure pipeline to the inlet of the sealing layer of the chamber structure simulation module. A pressure sensor is installed on the pipeline between the outlet of the gas tank and the inlet of the sealing layer, and its signal output end is connected to a data acquisition instrument. The data acquisition instrument is connected to the data interface of the control unit. The control unit is then linked to the compressor start / stop end, the proportional pressure valve adjustment end, and the leak detection device signal end via cables.

[0026] The specific working process is as follows: The control unit receives working condition commands from the multi-condition simulation control module, including the pressure range (corresponding to the prototype 8MPa-20MPa), the charging and discharging rate (0.1-0.5MPa / min), the number of cycles, or the pressure holding time. The control unit starts the air compressor, compresses the air to the target pressure, and stores it in the high-pressure gas tank. The proportional pressure valve precisely adjusts the valve opening and closing degree to deliver high-pressure gas to the sealing layer of the chamber. During the delivery process, the pressure sensor collects the pressure data of the pipeline and the chamber in real time. After preprocessing by the data acquisition instrument, the data is transmitted to the control unit. The control unit compares the collected data with the preset pressure curve and dynamically adjusts the compressor working state and the opening and closing degree of the proportional pressure valve to control the pressure fluctuation during the high-pressure holding stage within ±0.1MPa. At the same time, the leakage detection device monitors the pipeline sealing in real time. If a leak is detected or the pressure overshoot is ≥0.5MPa, the signal is immediately fed back to the control unit, triggering the pressure safety valve to start and stop the compressor operation, ensuring the safety of the test, until the preset charging and discharging cycle or high-pressure holding condition is completed.

[0027] (3) Chamber structure simulation module The chamber structure simulation module is used to receive uniform geological loads from the geostress simulation module and high-pressure gas from the high-pressure air loading control module to generate a structural mechanical response and output effect data, including stress and deformation, to the multi-field coupled data monitoring module. The chamber structure simulation module simulates the composite structure of chambers corresponding to different geological bodies, restoring the real mechanical properties and interfacial interactions of the surrounding rock, lining, and sealing layer. The composite structure of the chamber includes a surrounding rock similar material, an inner lining structure, a slip layer, and a sealing layer. Specifically, The surrounding rock similar materials are classified according to the geological body as follows: a. Soft rock: quartz sand + cement + gypsum + water; b. Salt rock: quartz sand + cement + bentonite + petrolatum; c. Hard rock: high-strength quartz sand + epoxy resin + curing agent; d. Porous strata: quartz sand + porous ceramsite + cement + water.

[0028] Lining: Reinforced concrete lining is used for soft rock / porous strata scenes, and plain concrete lining is used for hard rock / salt rock scenes; Slip layer: Talc powder with a purity of ≥98% is applied between the liner and the sealing layer to reduce the interfacial friction coefficient and avoid local stress concentration in the sealing layer due to liner deformation. Sealing layer: High-performance rubber airbags are used in soft rock / salt rock scenes; steel plate sealing layer is used in hard rock scenes to ensure sealing performance.

[0029] First, based on similarity theory (geometric similarity ratio 1:10, compressive strength / elastic modulus similarity ratio 10:1, Poisson's ratio / air pressure similarity ratio 1:1), similar materials for surrounding rock are prepared according to the target geological body type. Then, the lining structure is constructed. For soft rock / porous strata scenarios, wire mesh is tied and fixed inside the template before concrete is poured; for hard rock / salt rock scenarios, plain concrete is poured directly. After the lining is formed, talc powder is applied to the inner surface as a slip layer, and then a sealing layer is installed. Specifically, rubber airbags are mechanically fixed to the end face of the surrounding rock sample via end flanges and sealing gaskets. The steel plate sealing layer is welded and fixed in the reserved groove and filled with a tight seal. Sealing; then, similar materials for the surrounding rock are poured in layers to form the shape. During the process, pressure boxes and strain bricks are pre-embedded at the preset elevation and wire holes are reserved (with protective sleeves). The surrounding rock sample is fixed on the worktable of the geostress simulation module by a mechanical positioning clamp, and an elastic sealing gasket is filled between the inner wall and the sample fixing device. Finally, the air inlet of the sealing layer is connected to the high-pressure pipeline of the high-pressure air loading control module to ensure that the high-pressure gas can be accurately input into the sealed space formed by the sealing layer and the inner lining, while ensuring that the surrounding rock sample and the loading execution mechanism of the geostress simulation module are closely fitted to achieve uniform transmission of geological load and high-pressure gas.

[0030] (4) Multi-field coupling data monitoring module The multi-field coupled data monitoring module collects multi-field data from the chamber structure simulation module, processes it, and then synchronously transmits it to the multi-condition simulation control module and the stability evaluation module; wherein, the multi-field data includes stress, strain, displacement, temperature, and gas leakage. The multi-field coupling data monitoring module is used to simultaneously monitor key parameters such as stress, strain, displacement, temperature, and gas leakage during the test, and to capture the stability evolution law of the chamber structure under multi-field coupling. It includes a stress monitoring unit, a strain monitoring unit, a displacement monitoring unit, and a thermal-gas parameter monitoring unit. The stress monitoring unit includes surrounding rock stress monitoring and lining stress monitoring. During the layered casting of similar materials in the surrounding rock, high-precision earth pressure cells are buried at different elevation positions (250mm, 400mm, 550mm, 750mm, 900mm) for surrounding rock stress monitoring. The earth pressure cells have a measurement range of 0-20MPa and can monitor the stress distribution evolution of the surrounding rock under high pressure loading in real time. Miniature pressure sensors are fixed at the radial mid-section of the inner lining steel mesh for inner lining stress monitoring.

[0031] The strain monitoring unit includes surrounding rock strain monitoring and lining strain monitoring. Surround rock strain monitoring involves embedding strain bricks in similar materials to the surrounding rock to record the elastic-plastic strain evolution of the surrounding rock. Lining strain monitoring involves attaching resistance strain gauges to the outer surface of the lining to monitor axial and circumferential strain, respectively, to ensure the correlation between stress and strain data.

[0032] The displacement monitoring unit adopts a distributed optical fiber monitoring system, including optical fiber sensors, optical fiber demodulators and data analysis software. During the layered pouring of the surrounding rock, optical fibers are wound and laid in a manner of two layers per layer. Two layers of optical fibers are wound and laid at both ends and the middle section of the inner lining outer wall to realize synchronous monitoring of the overall displacement and local deformation of the chamber.

[0033] The thermal-gas parameter monitoring unit includes temperature monitoring and gas leakage monitoring. Temperature monitoring involves placing a platinum resistance temperature sensor in the chamber to monitor the temperature changes of compressed air in real time. Gas leakage monitoring involves setting up an annular micro-gas collection channel between the surrounding rock and the sealing layer, and using a gas flow meter to accurately monitor the gas leakage rate.

[0034] The stress monitoring unit connects to the analog input channel of the data acquisition unit. The signal output terminals of the strain gauge and strain brick in the strain monitoring unit are connected to the strain gauge via signal lines, and the digital signal output terminal of the strain gauge is connected to the data acquisition unit via a data line. In the displacement monitoring unit, both ends of the optical fiber are connected to the input and output ports of the optical fiber demodulator, which communicates with the data acquisition unit via a network cable. The signal output terminal of the flow meter in the heat-gas parameter monitoring unit is connected to the data acquisition unit via a signal line. The data acquisition unit connects to the core control unit of the multi-condition simulation control module and the data processing unit of the stability evaluation module, enabling synchronous transmission of the acquired data.

[0035] (5) Multi-condition simulation control module The multi-condition simulation control module is used to receive monitoring data from the multi-field coupling data monitoring module and optimization feedback from the stability evaluation module, and to issue condition control commands to the geostress simulation module and the high-pressure air loading control module to achieve closed-loop control of the test process. The multi-condition simulation control module simulates the actual operating conditions of the compressed air energy storage power station, covering stability assessment scenarios for different geological chambers, including the core control unit, the basic operating condition setting unit, and the geological body-specific operating condition unit. The basic operating condition setting unit includes three core operating conditions: cyclic gas charging / discharging, high-pressure holding, and gas charging / discharging rate. The parameters for these three core operating conditions can be customized. The geological body-specific operating condition unit designs specific experimental conditions for different geological bodies, including salt rock chamber-specific conditions, porous strata-specific conditions, and hard rock chamber-specific conditions. Specifically, the salt rock chamber-specific condition adds a creep-fatigue coupling condition, extending the holding time on top of the cyclic gas charging / discharging to simulate the creep damage effect of salt rock; the porous strata-specific condition sets a non-uniform pressure loading condition, simulating pressure distribution differences caused by reservoir heterogeneity by adjusting the zoned pressure output of the high-pressure air loading control module, and studying the impact of trap conditions on gas storage stability; the hard rock chamber-specific condition adds a fracture propagation monitoring condition, using acoustic emission sensors to capture the evolution of micro-fractures in hard rock under high pressure.

[0036] The core control unit is connected to the hydraulic pump station control terminal of the ground stress simulation module, the air compressor start / stop terminal and proportional pressure valve control terminal of the high-pressure air loading control module, and is used to issue ground stress loading parameters and high-pressure gas charging / discharging control commands. The core control unit is also connected to the data acquisition instrument output terminal of the multi-field coupled data monitoring module and the leakage detection device signal terminal of the high-pressure air loading control module to receive real-time monitoring data and abnormal alarm signals. The core control unit achieves bidirectional data interaction with the data processing unit of the stability evaluation module, receiving evaluation result feedback and simultaneously transmitting test condition parameters to the stability evaluation module for report generation. An alarm device is connected to the core control unit; when the monitored data exceeds a preset threshold, the alarm device is triggered to issue an audible and visual alarm, and simultaneously sends commands to the ground stress simulation module and the high-pressure air loading control module to stop the loading operation.

[0037] The specific working process is as follows: Working condition parameters are configured through the basic working condition setting unit and the geological body-specific working condition unit. Parameters such as the target pressure range, number of cycles, holding time, and loading rate are input. These parameters are parsed by the core control unit and stored as a preset working condition scheme. Subsequently, the core control unit receives real-time monitoring data such as stress, strain, displacement, pressure, and leakage rate from the multi-field coupled data monitoring module, and simultaneously receives structural optimization suggestions from the stability evaluation module. Next, based on the comparison between the preset working condition scheme and real-time data, it issues ground stress loading / adjustment commands to the hydraulic pump station of the ground stress simulation module, and start / stop and opening adjustment commands to the compressor and proportional pressure valve of the high-pressure air loading control module, achieving coordinated control of geological load and high-pressure gas. During the test, feedback data from each module is continuously received, and control commands are dynamically adjusted to ensure accurate execution of working condition parameters. If an abnormality is detected, an audible and visual alarm is immediately triggered, and the ground stress loading and high-pressure air supply are cut off via an emergency stop relay to ensure test safety. After the preset working conditions are completed, the test data is summarized and transmitted to the stability evaluation module for report generation. It also supports adjusting working condition parameters based on optimization suggestions, providing adaptation schemes for subsequent tests.

[0038] (6) Stability evaluation module The stability evaluation module is used to receive multi-field data from the multi-field coupling data monitoring module to quantify the stability level of the chamber and generate an evaluation report, while feeding back optimization suggestions to the multi-condition simulation control module.

[0039] The stability evaluation module quantifies the stability level of the chamber structure based on monitoring data and proposes optimization suggestions in conjunction with geological evaluation theory. It includes a data processing unit, a stability evaluation unit, and a result output unit. The signal input port of the data processing unit is connected to the data acquisition instrument of the multi-field coupled data monitoring module to receive multi-field parameter data such as stress, strain, displacement, temperature, and leakage rate. The output of the data processing unit is connected to the input of the stability evaluation unit, transmitting the filtered and fitted processed data to the evaluation unit for stability index calculation. The output of the stability evaluation unit is connected to the result output unit, and the generated stability evaluation report is presented through the display interface of the output unit. The feedback port of the stability evaluation unit is connected to the core control unit of the multi-condition simulation control module, translating structural optimization suggestions into experimental parameter adjustment commands for subsequent experimental condition optimization.

[0040] The data processing unit uses professional data analysis software to generate pressure-strain curves, displacement-time curves, temperature-pressure curves, etc. It has functions such as data filtering, peak extraction, and trend fitting, and can identify key thresholds, such as the critical strain corresponding to lining cracking, the critical pressure for sealing layer leakage, and the critical displacement for surrounding rock instability.

[0041] The stability evaluation unit is connected to the result output unit to establish a stability evaluation system for multi-geological-body chambers, including stability evaluation for soft rock chambers, salt rock chambers, porous strata chambers, and hard rock chambers; specifically, ① Stability evaluation of soft rock chambers: Focus on analyzing the deformation of the surrounding rock, the propagation of cracks in the lining, and the fatigue life of the sealing layer, and evaluate the long-term stability of the structure in combination with the geostress combination parameters; ②Stability evaluation of salt rock chamber: Referencing the salt rock creep-fatigue model, evaluate creep deformation, support stability, and sealing performance; ③ Stability evaluation of porous formation chambers: Analyze the effectiveness of the trap, gas recovery rate, and reservoir deformation, and make a comprehensive score with reference to the porous formation site selection evaluation system; ④ Stability evaluation of hard rock chambers: assess crack control effectiveness, composite lining bearing capacity, and sealing performance.

[0042] The output unit generates a detailed stability evaluation report, including test parameters, multi-field monitoring data curves, stability evaluation index scores, critical failure condition analysis, and structural optimization suggestions, such as lining thickness adjustment schemes, sealing material selection suggestions, and ground stress adaptation schemes, providing theoretical support and data references for the design and construction of actual compressed air energy storage chambers.

[0043] This invention integrates modules for geostress simulation, high-pressure air loading control, chamber structure simulation, multi-field coupled data monitoring, multi-condition simulation control, and stability evaluation. It can adapt to the simulation needs of chamber structures in various geological bodies, achieving accurate reproduction of the mechanical response of composite chamber structures under geological loads and high-pressure gas in actual engineering projects. By simultaneously collecting multi-dimensional key parameters through the multi-field coupled data monitoring module and combining it with the closed-loop control function of the multi-condition simulation control module, it comprehensively covers different operating conditions and geological body-specific test scenarios, effectively capturing the stability evolution law of chamber structures under complex conditions and accurately identifying key influencing factors of core indicators such as sealing performance and structural strength. Simultaneously, through a stable and reliable safety protection mechanism and a scientific stability evaluation system, it provides comprehensive and reliable test data support for the structural design optimization, sealing material selection, and operating parameter setting of chamber-type compressed air energy storage power stations.

[0044] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, apparatus, article, or method that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, apparatus, article, or method. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, apparatus, article, or method that includes that element.

[0045] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A test system for simulating the stability of a compressed air energy storage chamber, characterized in that, It includes a geostress simulation module, a high-pressure air loading control module, a chamber structure simulation module, a multi-field coupling data monitoring module, a multi-condition simulation control module, and a stability evaluation module. The geostress simulation module is connected to the chamber structure simulation module. The chamber structure simulation module is connected to the high-pressure air loading control module and the multi-field coupling data monitoring module. The high-pressure air loading control module is connected to the multi-condition simulation control module. The multi-condition simulation control module is connected to the geostress simulation module, the multi-field coupling data monitoring module, and the stability evaluation module. The stability evaluation module is also connected to the multi-field coupling data monitoring module. The geostress simulation module is used to receive the loading command from the multi-condition simulation control module, apply uniform geological load to the chamber structure simulation module, and simultaneously feed back real-time geostress data to the multi-condition simulation control module. The high-pressure air loading control module is used to receive pressure control commands from the multi-condition simulation control module, deliver high-pressure gas to the chamber structure simulation module, and simultaneously feed back pipeline and chamber pressure data to the multi-condition simulation control module. The chamber structure simulation module is used to receive uniform geological loads from the geostress simulation module and high-pressure gas from the high-pressure air loading control module to generate a structural mechanical response and output effect data, including stress and deformation, to the multi-field coupled data monitoring module. The multi-field coupled data monitoring module collects multi-field data from the chamber structure simulation module, processes it, and then synchronously transmits it to the multi-condition simulation control module and the stability evaluation module; wherein, the multi-field data includes stress, strain, displacement, temperature, and gas leakage. The multi-condition simulation control module is used to receive monitoring data from the multi-field coupling data monitoring module and optimization feedback from the stability evaluation module, and to issue condition control commands to the geostress simulation module and the high-pressure air loading control module to achieve closed-loop control of the test process. The stability evaluation module is used to receive multi-field data from the multi-field coupling data monitoring module to quantify the stability level of the chamber and generate an evaluation report, while feeding back optimization suggestions to the multi-condition simulation control module.

2. The test system for simulating the stability of a compressed air energy storage chamber according to claim 1, characterized in that, The geostress simulation module includes an electro-hydraulic servo large true triaxial loading platform, a hydraulic pump station, a sample fixing device, a pressure sensor, a displacement sensor, and a signal conditioning unit. The loading actuator of the electro-hydraulic servo large true triaxial loading platform is connected to the sample fixing device. The power input end of the loading actuator is connected to the hydraulic pump station via a high-pressure oil pipe. The control signal input end of the hydraulic pump station is connected to the multi-condition simulation control module. Pressure sensors and displacement sensors are integrated on the electro-hydraulic servo large true triaxial loading platform and are connected to the signal conditioning unit via signal lines. The output end of the signal conditioning unit is connected to the multi-condition simulation control module to realize real-time transmission of ground stress loading data. The inner wall of the sample fixing device is in close contact with the surrounding rock sample of the chamber structure simulation module. The surrounding rock sample of the chamber structure simulation module is placed in the sample fixing device. It receives the in-situ stress parameter instructions, including target pressure, loading rate, and lateral pressure coefficient, issued by the multi-condition simulation control module. The hydraulic pump station delivers hydraulic power to the hydraulic cylinder of the electro-hydraulic servo large true triaxial loading platform, and applies in-situ stress in stages according to preset parameters to realize the simulation of stress state dominated by hydrostatic pressure or horizontal tectonic stress. During the loading process, the pressure sensor and displacement sensor synchronously collect the actual loading pressure and sample displacement data. After preprocessing by the signal conditioning unit, the data is transmitted to the multi-condition simulation control module, which compares the collected data with the target parameters and adjusts the output of the hydraulic pump station through feedback instructions to control the pressure fluctuation within the set range. After reaching the target in-situ stress, it enters a stable load holding state until the end of the test condition. If the pressure sensor and displacement sensor detect pressure overshoot or displacement abnormality, the abnormal signal is fed back to the multi-condition simulation control module in real time and triggers the loading stop command.

3. The test system for simulating the stability of a compressed air energy storage chamber according to claim 2, characterized in that, The high-pressure air loading control module includes a power source unit, a pressure buffer unit, a pressure monitoring unit, a control unit, and a high-pressure transmission unit. The power source unit is an air compressor, the pressure buffer unit is a high-pressure air tank, and the pressure monitoring unit consists of a high-precision pressure sensor, a data acquisition instrument, and a data transmission subunit. The control unit is controlled by a PLC and has multiple preset pressure control curves. The high-pressure transmission unit uses stainless steel pipes and is equipped with a proportional pressure valve, a shut-off valve, and a leakage detection device. The air compressor exhaust port is connected to the high-pressure gas tank inlet via a high-pressure pipeline consisting of a series shut-off valve and a check valve. The high-pressure gas tank outlet is connected to a proportional pressure valve via a high-pressure pipeline. The output of the proportional pressure valve extends through the high-pressure pipeline to the sealing layer inlet of the chamber structure simulation module. A pressure sensor is installed on the pipeline between the gas tank outlet and the sealing layer inlet, and its signal output is connected to a data acquisition instrument. The data acquisition instrument is connected to a control unit, which is linked to the compressor start / stop terminal, the proportional pressure valve adjustment terminal, and the leak detection device signal terminal. The control unit receives operating condition commands from the multi-condition simulation control module, starts the air compressor, compresses the air to the target pressure, and stores it in the high-pressure gas tank. The proportional pressure valve precisely adjusts the valve opening and closing degree to deliver high-pressure gas to the chamber sealing layer. During the delivery process, the pressure sensor collects real-time pressure data from the pipeline and the chamber. After preprocessing by the data acquisition instrument, the data is transmitted to the control unit. The control unit compares the collected data with a preset pressure curve and dynamically adjusts the compressor operating state and the proportional pressure valve opening and closing degree. At the same time, the leak detection device monitors the pipeline sealing performance in real time and feeds back to the control unit.

4. The test system for simulating the stability of a compressed air energy storage chamber according to claim 3, characterized in that, The chamber structure simulation module includes a module that simulates the composite structure of chambers corresponding to different geological bodies. The composite structure of the chamber includes a surrounding rock similar material, an inner lining structure, a slip layer, and a sealing layer. Based on similarity theory, surrounding rock similarity materials are prepared according to the target geological body type, and then an inner lining structure is made. After the inner lining is formed, talc powder is applied to the inner surface as a slip layer, and then a sealing layer is installed. Next, the surrounding rock similarity materials are poured in layers to form a surrounding rock sample and fixed on the worktable of the geostress simulation module. An elastic sealing gasket is filled between the inner wall of the sample and the sample fixing device. Finally, the air inlet of the sealing layer is connected to the high-pressure air loading control module.

5. The test system for simulating the stability of a compressed air energy storage chamber according to claim 4, characterized in that, The multi-field coupling data monitoring module monitors stress, strain, displacement, temperature, and gas leakage during the test, including a stress monitoring unit, a strain monitoring unit, a displacement monitoring unit, and a thermal-gas parameter monitoring unit. The stress monitoring unit includes surrounding rock stress monitoring and lining stress monitoring. During the layered casting of similar materials in the surrounding rock, high-precision earth pressure cells are buried at different elevations to monitor the stress distribution evolution of the surrounding rock under high pressure loading in real time. The lining stress monitoring uses miniature pressure sensors fixed at the radial midsection of the lining steel mesh. The strain monitoring unit includes surrounding rock strain monitoring and lining strain monitoring. Surround rock strain monitoring involves embedding strain bricks in similar materials to the surrounding rock to record the elastic-plastic strain evolution of the surrounding rock. Lining strain monitoring involves attaching resistance strain gauges to the outer surface of the lining to monitor axial and circumferential strain respectively, ensuring the correlation between stress and strain data. The displacement monitoring unit adopts a distributed optical fiber monitoring system, which lays optical fibers during the layered pouring of the surrounding rock to achieve synchronous monitoring of the overall displacement and local deformation of the chamber. The thermal-gas parameter monitoring unit includes temperature monitoring and gas leakage monitoring. Temperature monitoring involves placing a platinum resistance temperature sensor in the chamber to monitor the temperature changes of compressed air in real time. Gas leakage monitoring involves setting up an annular micro-gas collection channel between the surrounding rock and the sealing layer, and installing a gas flow meter to accurately monitor the gas leakage rate.

6. The test system for simulating the stability of a compressed air energy storage chamber according to claim 5, characterized in that, The multi-condition simulation control module simulates the actual operating conditions of the compressed air energy storage power station, covering the stability scenarios of different geological chambers, including the core control unit, the basic operating condition setting unit, and the geological body-specific operating condition unit. The basic operating condition setting unit includes three core operating conditions: cyclic charging and discharging, high-pressure holding, and charging and discharging rate. The parameters of these three core operating conditions can be configured by customization. The geological body-specific working condition unit sets up exclusive test conditions for the characteristics of different geological bodies, including salt rock chamber-specific working conditions, porous strata-specific working conditions, and hard rock chamber-specific working conditions. Specifically, the salt rock chamber-specific working condition adds a creep-fatigue coupling condition, extending the pressure holding time on the basis of cyclic gas filling and defilling to simulate the creep damage effect of salt rock; the porous strata-specific working condition sets a non-uniform pressure loading condition, simulating the pressure distribution differences caused by reservoir heterogeneity by adjusting the zoned pressure output of the high-pressure air loading control module; the hard rock chamber-specific working condition adds a fracture propagation monitoring condition, setting up acoustic emission sensors to determine the micro-fracture evolution process of hard rock under high pressure. The core control unit is connected to the hydraulic pump station of the ground stress simulation module and the air compressor and proportional pressure valve of the high-pressure air loading control module, respectively, to issue ground stress loading parameters and high-pressure gas charging and discharging control commands; the core control unit is connected to the data acquisition instrument of the multi-field coupled data monitoring module and the leakage detection device of the high-pressure air loading control module, to receive real-time monitoring data and abnormal alarm signals; the core control unit realizes bidirectional data interaction with the stability evaluation module, receives evaluation result feedback, and transmits test condition parameters to the stability evaluation module for report generation.

7. The test system for simulating the stability of a compressed air energy storage chamber according to claim 6, characterized in that, The stability evaluation module includes a data processing unit, a stability evaluation unit, and a result output unit; The signal input port of the data processing unit is connected to the data acquisition instrument to receive stress, strain, displacement, temperature, and leakage rate. The output of the data processing unit is connected to the input of the stability evaluation unit, transmitting the filtered and fitted processed data to the evaluation unit for stability index calculation; the output of the stability evaluation unit is connected to the result output unit to generate the stability evaluation report. The feedback port of the stability evaluation unit is connected to the core control unit, which converts structural optimization suggestions into test parameter adjustment instructions; The data processing unit uses professional data analysis software to generate pressure-strain curves, displacement-time curves, and temperature-pressure curves, and to identify key thresholds. The stability evaluation unit is used to establish a stability evaluation system for multi-geological-body chambers, including stability evaluation of soft rock chambers, stability evaluation of salt rock chambers, stability evaluation of porous strata chambers, and stability evaluation of hard rock chambers. The results output unit is used to generate a detailed stability evaluation report, which includes test parameters, multi-field monitoring data curves, stability evaluation index scores, critical failure condition analysis, and structural optimization suggestions.

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