A system and method for testing the bearing capacity of solid waste-based filling materials under a multi-field coupling environment

Abstract

The present invention provides a system and method for testing the bearing performance of solid waste-based filling materials under a multi-field coupling environment. The system and method for testing the bearing performance of solid waste-based filling materials under a multi-field coupling environment mainly include a model system, an axial loading system, a pore water and gas quantitative injection system, and a data collection and processing system. The method for testing the bearing performance of solid waste-based filling materials under a multi-field coupling environment includes: realizing the construction of a fully enclosed stress field, a seepage field, an acid-base field, and a temperature field through a constructed experimental system, and real-time monitoring of relevant physical and chemical properties through a metering monitoring system. The system and method of the present invention can flexibly construct a multi-field coupling environment, more accurately simulate the bearing performance of solid waste-based filling materials under actual mine conditions, and provide experimental data support for the application of solid waste-based filling materials.

Description

Technical Field

[0001] The present invention belongs to the technical field of multi-field coupling experimental testing, and in particular relates to a system and method for testing the bearing performance of solid waste-based filling materials under a multi-field coupling environment. Background Art

[0002] In recent years, the scale treatment technology of underground solid waste has been continuously developed, and underground filling of solid waste-based materials has become one of the common methods for mine solid waste treatment in my country. However, underground conditions are complex and changeable. After the solid waste-based filling materials are filled, they will be affected by multiple factors such as stress field, seepage field, temperature field, pH, etc., and their bearing characteristics under the coupling of multiple fields are difficult to be observed intuitively and effectively underground. At the same time, the current solid waste-based filling material experimental equipment cannot effectively construct a multi-field coupled mechanical experimental environment. It is urgent to develop a new experimental system and its supporting test methods that can test the bearing and compression performance of solid waste-based filling materials under a multi-field coupling environment. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a solid waste-based filling material bearing performance testing system under a multi-field coupling environment and a supporting testing method thereof, which flexibly constructs a multi-field coupling environment, more accurately simulates the bearing performance of solid waste-based filling materials under actual mine conditions, and provides experimental data support for the application of solid waste-based filling materials.

[0004] Technical solution: To achieve the above purpose, the technical solution adopted by the present invention is:

[0005] The first object of the present invention is to provide a system for testing the bearing capacity of solid waste-based filling materials under a multi-field coupling environment, the system comprising a pore water and gas quantitative injection system, an axial loading system, a model system, and a data collection and processing system, wherein:

[0006] The model system comprises a sample, a flexible heating sleeve, a model cylinder, an axial loading rod, a temperature sensor, and a pressure sensor. The outer periphery of the model cylinder is provided with the flexible heating sleeve, wherein the flexible heating sleeve has a built-in resistance wire heating device for performing constant temperature heating on the sample placed in the model cylinder; the temperature sensor and the pressure sensor are located on both sides of the model cylinder for monitoring the temperature and pressure of the sample; the upper and lower ends of the model cylinder are axially connected with the axial loading rod, and the axial loading rods at the upper and lower ends are respectively provided with a seepage outlet and a seepage inlet;

[0007] The pore water and gas quantitative injection system is connected to the seepage inlet of the model system, and comprises a gas injection part and a liquid injection part, and is used to inject gas and liquid into the model system;

[0008] The axial loading system is axially connected to the axial loading rod of the model system and is used to provide axial stress to the specimen;

[0009] The data collection and processing system is independently signal-connected to the pore water and gas quantitative injection system, the axial loading system, and the model system, and is used to control the input parameters of the gas and liquid injected into the model system by the pore water and gas quantitative injection system, and to control the axial stress provided to the sample by the axial loading system, and to collect and process monitoring signals from the model system, wherein the monitoring signals include the temperature and pressure monitored by the temperature sensor and the pressure sensor.

[0010] Optionally, in one embodiment of the present invention, the input parameters of the gas and liquid injected into the model system by the pore water and gas quantitative injection system include the flow rate, pressure and type of the gas, and the flow rate, pressure, type and pH of the liquid.

[0011] Optionally, in one embodiment of the present invention, the gas injection part pressurizes the gas stored in the gas cylinder through a static air compressor and a gas booster pump and inputs the pressurized gas into the model system.

[0012] Optionally, in one embodiment of the present invention, a gas storage tank is provided on the way for gas storage and buffering.

[0013] Optionally, in one embodiment of the present invention, the liquid injection part pressurizes the liquid inside the water tank and inputs it into the model system through a constant speed and constant pressure pump.

[0014] Optionally, in one embodiment of the present invention, the sample is a cylindrical sample formed by crushed stone pressing, with a bottom of Φ100 and a height not higher than 200 mm.

[0015] Optionally, in one embodiment of the present invention, the axial loading system includes a servo testing machine.

[0016] Optionally, in one embodiment of the present invention, the flexible heating sleeve is an asbestos heating and insulation sleeve with a built-in resistance wire heating device; the data collection and processing system is connected to the flexible heating sleeve to control its power supply and temperature to achieve constant temperature heating of the sample.

[0017] Optionally, in one embodiment of the present invention, the outer shell of the model cylinder is duplex stainless steel, which meets the temperature resistance of -50°C to 280°C.

[0018] Optionally, in one embodiment of the present invention, rubber sealing rings are provided at both upper and lower ends of the model cylinder to construct a closed gas-liquid environment.

[0019] Optionally, in one embodiment of the present invention, the gas injection part and the liquid injection part of the pore water and gas quantitative injection system are both provided with flow meters and pressure gauges for monitoring the flow and pressure data of gas and liquid, and transmitting them to the data collection and processing system in real time.

[0020] Optionally, in one embodiment of the present invention, the data collection and processing system includes a data collection block and a data collection and processing terminal.

[0021] The data acquisition block includes an analog signal data acquisition module, a MOXA C168H / PCI data acquisition board, and a KL-M4514 acquisition module, which are used to convert the collected monitoring signals into electrical signal data and transmit them to the data collection and processing terminal;

[0022] The data collection and processing terminal includes a computer terminal and data acquisition control software, which are used to process the electrical signal data and display the measurement results.

[0023] Optionally, in one embodiment of the present invention, the system further comprises a water and gas collection system, and the water and gas collection system is connected to the seepage outlet of the model system and is used to collect waste liquid and waste gas discharged from the model system.

[0024] Optionally, in one embodiment of the present invention, the water and gas collection system reduces the pressure of the waste gas and waste liquid generated by the model system test through a vacuum pump and a back-pressure pump, and the waste gas and waste liquid flow through a condenser, a gas-liquid separator, and a low-pressure dryer (18) in sequence to finally collect the waste liquid and waste gas in a recovery container and a recovery gas cylinder.

[0025] Optionally, in one embodiment of the present invention, the vacuum pump is provided with a buffer container.

[0026] Optionally, in one embodiment of the present invention, the back-pressure pump is provided with a back-pressure container.

[0027] The second object of the present invention is to provide a working method of the above system, which realizes the construction of a fully enclosed stress field, seepage field, acid-base field and temperature field through the constructed experimental system, and monitors the relevant physical and chemical properties in real time through the measurement monitoring system, which specifically includes the following steps:

[0028] Step 1: Place the sample

[0029] placing a sample of the solid waste-based filling material inside the model system and sealing the model system;

[0030] Step 2: Build a multi-field coupling environment

[0031] According to the experimental design, the input parameters of axial stress, liquid and gas required for the experiment are set through the data collection and processing system;

[0032] The pore water and gas quantitative injection system is turned on to inject liquid and gas into the closed model system to construct a seepage field and a pH field environment; the pore water and gas quantitative injection system constructs a seepage field and a pH field environment for the test system by adjusting the gas and liquid pressures and the pH of the liquid;

[0033] Turn on the heating device inside the flexible heating jacket to heat the sample inside the model system to a set temperature and build a temperature field environment;

[0034] Apply axial stress through the axis loading system to build the stress field;

[0035] Step 3: Test and record data

[0036] According to the test plan design, the loading is continued until the experimental design time, and the monitoring data of the sample during the test is collected and recorded through the data collection and processing system.

[0037] Optionally, in one embodiment of the present invention, the monitoring data includes axial stress and test environment temperature, the axial stress is obtained by monitoring a pressure sensor, and the test environment temperature is obtained by monitoring a temperature sensor.

[0038] Optionally, in one embodiment of the present invention, the monitoring data also includes fluid stress and gas-liquid flow rate, the fluid stress is obtained by monitoring a pressure gauge, and the gas-liquid flow rate is obtained by monitoring a flow meter.

[0039] Optionally, in one embodiment of the present invention, the monitoring data is displayed in a form including images and digital data.

[0040] Optionally, in one embodiment of the present invention, the experimental design time is generally 0.5 to 3 hours, and can be specifically set according to experimental needs.

[0041] The second object of the present invention is to provide the above-mentioned system or method, which is applied to the field of filling material bearing performance testing.

[0042] Beneficial effects: The present invention realizes the construction of a fully enclosed stress field, seepage field, acid-base field and temperature field through the constructed experimental system, and monitors the relevant physical and chemical properties in real time through the metering monitoring system. The system and method of the present invention can flexibly construct a multi-field coupling environment, more accurately simulate the bearing performance of solid waste-based filling materials in actual mine conditions, and provide experimental data support for the application of solid waste-based filling materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A schematic diagram of the connections of various components in a system for testing the bearing performance of solid waste-based filling materials under a multi-field coupling environment.

[0044] Figure 2 Schematic diagram of the model system.

[0045] In the figure: 1-static air compressor; 2-gas cylinder; 3-gas booster pump; 4-gas storage tank; 5-water tank; 6-constant speed constant pressure pump; 7-press; 8-controller; 9-control terminal; 10-acquisition card; 11-data collection terminal; 12-buffer container; 13-vacuum pump; 14-back pressure container; 15-back pressure pump; 16-condenser; 17-gas-liquid separator; 18-low-pressure dryer; 19-recovery gas cylinder; 20-electronic balance; 21-seepage inlet; 22-sealing ring; 23-sample; 24-flexible heating jacket; 25-model cylinder; 26-axial loading rod; 27-seepage outlet; b1-flow meter; b2-pressure reducing valve; b3-safety valve; b4-check valve; b5-pressure gauge; c1-temperature sensor; c2-pressure sensor. DETAILED DESCRIPTION

[0046] In order to further understand the features, technical means, specific objectives and functions of the present invention, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0047] The bearing capacity test system of solid waste-based filling materials under multi-field coupling environment mainly includes pore water and gas quantitative injection system A, axial loading system B, model system C, data collection and processing system D, water and gas collection system. The equipment models and equipment information purchased for this experimental system are shown in Table 1.

[0048] Table 1 System key equipment parameters

[0049]

[0050]

[0051]

[0052] 1. Pore water and gas quantitative injection system A

[0053] The pore water and gas quantitative injection system A mainly includes a gas injection part and a liquid injection part. The gas injection part pressurizes the gas stored in the gas cylinder 2 through the static pressure air compressor 1 and the gas booster pump 3 and inputs it into the model system C. A gas storage tank 4 is set on the way as a gas storage and buffer. The liquid input system part pressurizes the liquid inside the water tank 5 and inputs it into the model system C through the constant speed constant pressure pump 6.

[0054] The above two systems construct the seepage field and pH field environment for the test system by adjusting the gas and liquid pressures and the pH of the liquid. The models of related equipment are selected and purchased according to the test requirements.

[0055] At the same time, the pore water and gas quantitative injection system A is provided with a flow meter b1 and a pressure gauge b5 for monitoring the flow and pressure data of gas and liquid and transmitting them to the data collection and processing system D in real time.

[0056] This system automatically reduces the higher gas-hydraulic pressure to the required low gas-hydraulic pressure through the pressure reducing valve b2. When the seepage system is over-pressured, the gas and liquid in the system can be directly discharged from the system through the overflow hole of the safety valve b3 to reduce the internal pressure of the system and protect the system safety. The one-way valve b4 can also be used to prevent the gas and liquid from flowing in the opposite direction, playing a check role. The maximum pore pressure of this system is 10MPa, the effective pressure range is 4% to 100% FS (continuous), the measurement accuracy is ≤±2% FS, the pressure resolution is 0.01MPa, the pore water flow resolution is 0.1ml, the pore water applied flow is 0 to 200ml / min, and the gas input pressure is 10MPa.

[0057] 2. Axial loading system B

[0058] The axial loading system B is provided externally, and generally a servo test machine is used to provide the axial stress of the test system. The control terminal 9 controls the press machine 7 through the controller 8 to provide the axial loading pressure, which is the axial stress applied to the test system.

[0059] 3. Model System C

[0060] The model system C is the main structure of the experimental model, and mainly includes a seepage inlet 21, a sample 23, a flexible heating sleeve 24, a model cylinder 25, an axial loading rod 26, a seepage outlet 27, a temperature sensor c1, and a pressure sensor c2.

[0061] The size of sample 23 is a cylindrical sample of Φ100×200mm (specifications after crushed stone pressing);

[0062] The outer periphery of the model cylinder 25 is provided with a flexible heating sleeve 24, which is a high temperature resistant, environmentally friendly and heat-insulating asbestos heating and heat-insulating sleeve, and has a built-in resistance wire heating device throughout the protective sleeve. The power supply and temperature control of the equipment are controlled by the data collection and processing system D, so as to realize constant temperature heating of the sample 23 placed in the model cylinder 25. The test temperature is room temperature to 150°C, the temperature control accuracy is ±1°C, and the temperature resolution is 0.1°C.

[0063] The shell of the model cylinder 25 is made of high-quality 2205 duplex stainless steel, which can meet the temperature resistance of -50°C to 280°C, and can meet the requirements of explosion-proof, corrosion-resistant, oxidation-resistant and other equipment. The axial loading rod 26 connected to the bottom of the model cylinder 25 is provided with a seepage inlet 21 for the injection of gas and liquid, and the axial loading rod 26 connected to the top of the model cylinder 25 is provided with a seepage outlet 27 for discharging waste liquid and waste gas generated by the test;

[0064] The model cylinder 25 is provided with rubber sealing rings 22 at the top and bottom to construct a closed gas-liquid environment;

[0065] The temperature sensor c1 and the pressure sensor c2 are welded on both sides of the model cylinder 24, and their data transmission lines are attached inside the flexible heating sleeve 24 and connected to the data collection and processing system D together with the lines of the heating device.

[0066] 4. Data Collection and Processing System D

[0067] The data collection and processing system D is composed of a data acquisition block 10, a data collection and processing terminal 11, etc., and is used to collect and process monitoring signals from the model system (C).

[0068] The data acquisition block 10 is composed of an analog signal data acquisition module, a MOXA C168H / PCI data acquisition board, a KL-M4514 acquisition module, etc. It can convert the collected monitoring signals including temperature, pressure, flow and other signals into electrical signal data and transmit them to the data collection and processing terminal 11.

[0069] The data collection and processing terminal 11 is mainly composed of a computer terminal and data acquisition control software. The software runs in a windows environment and is programmed using Delphi. The instrument workflow is displayed on the interface, which enables human-computer dialogue. After the operator sets the parameters, unattended operation can be achieved, and the computer can automatically collect all pressure, temperature, flow and other values. The terminal can at least achieve the following functions:

[0070] ① According to the requirements of basic functions, interface elements such as buttons and edit boxes are used to divide it into cover, main interface and sub-interface. The functional sub-interface is divided into specimen stress displacement, fluid flow, etc. to display the data curves of various parameters changing with time in real time.

[0071] ② Realize dynamic display of the experimental system process: use configuration tools to draw out the process of each experimental step, and display the direction of inflow and outflow through animation; display the necessary temperature and pressure measurement values, injection pump displacement and cumulative injection volume on the flow chart.

[0072] ③ The temperature, pressure and other data of sample 23 collected in real time are updated and saved in a single-step file for users to retrieve and use; data is saved and backed up, with unexpected shutdown recovery and continuation functions. This ensures that the system software can work reliably for a long time in the actual experimental environment.

[0073] 5. Water and gas collection system

[0074] The water and gas collection system reduces the pressure of the waste gas and waste liquid generated by the test through a vacuum pump 13 with a buffer container 12 and a back-pressure pump 15 with a back-pressure container 14, and the waste gas and waste liquid flow through a condenser 16, a gas-liquid separator 17, and a low-pressure dryer 18 in sequence, and finally collects the waste liquid and waste gas in a recovery container 20 and a recovery gas cylinder 19 to prevent environmental pollution.

[0075] The specific experimental steps are as follows:

[0076] Step 1: Place the sample

[0077] Place the sample 23 of the solid waste-based filling material inside the model system C, with the height of the sample in the model not exceeding 200 mm, close the model and safely open the system.

[0078] Step 2: Build a multi-field coupling environment

[0079] According to the experimental design, the axial loading pressure, liquid (gas) flow rate and pressure, temperature and other parameters required for the experiment are set through the data collection and processing system D;

[0080] Then, the type and pH of the liquid are set, the pore water and gas quantitative injection system A is turned on, and the gas and liquid under the above set pressure are injected into the closed model system C to construct the seepage field and pH field environment;

[0081] After that, the heating device inside the flexible heating sleeve 23 is turned on to heat the sample 23 inside the model system C to a set temperature, thereby constructing a temperature field environment;

[0082] Finally, axial stress is applied through the axis loading system B to construct the stress field.

[0083] Step 3: Test and record data

[0084] According to the test plan design, the loading is continued for a period of time until the experimental design time, generally 0.5 to 3 hours, and the image and digital data such as axial stress, fluid stress, test environment temperature, gas-liquid flow rate of the sample 23 during the test are collected and recorded by the data collection and processing system D, wherein the axial stress is monitored by the pressure sensor c2, the test environment temperature is monitored by the temperature sensor c1, the fluid stress is monitored by the pressure gauge b5, and the gas-liquid flow rate is monitored by the flow meter b1. The axial stress and the test environment temperature are the test results of the bearing performance of the solid waste-based filling material under the multi-field coupling environment obtained by simulation, while the fluid stress and the gas-liquid flow rate are the actual experimental values ​​of the pore water and gas quantitative injection system A, which are used by the data collection and processing system D to calibrate and control the input parameters of the gas and liquid injected into the model system by the pore water and gas quantitative injection system A.

[0085] Step 4: Restore the test system

[0086] After the experiment is over, the model system C is dismantled, the experimental sample 23 is taken out, and the experimental mold is cleaned to ensure that the next experiment can proceed normally.

[0087] In summary, the present invention provides a system and method for testing the bearing performance of solid waste-based filling materials under a multi-field coupling environment. The system and method for testing the bearing performance of solid waste-based filling materials under a multi-field coupling environment mainly include a model system, an axial loading system, a pore water and gas quantitative injection system, and a data collection and processing system. The method for testing the bearing performance of solid waste-based filling materials under a multi-field coupling environment includes: realizing the construction of a fully enclosed stress field, seepage field, acid-base field, and temperature field through a constructed experimental system, and real-time monitoring of relevant physical and chemical properties through a metering monitoring system. The system and method of the present invention can flexibly construct a multi-field coupling environment, more accurately simulate the bearing performance of solid waste-based filling materials in actual mine conditions, and provide experimental data support for the application of solid waste-based filling materials.

[0088] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A system for testing the bearing capacity of solid waste-based filling materials under a multi-field coupling environment, characterized in that: The system includes a pore water and gas quantitative injection system (A), an axial loading system (B), a model system (C), and a data collection and processing system (D). The model system (C) comprises a sample (23), a flexible heating sleeve (24), a model cylinder (25), an axial loading rod (26), a temperature sensor (c1), and a pressure sensor (c2); the outer periphery of the model cylinder (25) is provided with the flexible heating sleeve (24), wherein the flexible heating sleeve (24) has a built-in resistance wire heating device for performing constant temperature heating on the sample (23) placed in the model cylinder (25); the temperature sensor (c1) and the pressure sensor (c2) are located on both sides of the model cylinder (25) for monitoring the temperature and pressure of the sample (23); the upper and lower ends of the model cylinder (25) are axially connected to the axial loading rod (26), and the upper and lower ends of the axial loading rod (26) are respectively provided with a seepage outlet (27) and a seepage inlet (21); The pore water and gas quantitative injection system (A) is connected to the seepage inlet (21) of the model system (C), and comprises a gas injection part and a liquid injection part, and is used to inject gas and liquid into the model system (C); The axial loading system (B) is axially connected to the axial loading rod (26) of the model system (C) to provide axial stress to the specimen; The data collection and processing system (D) is independently signal-connected to the pore water and gas quantitative injection system (A), the axial loading system (B), and the model system (C), and is used to control the input parameters of the gas and liquid injected by the pore water and gas quantitative injection system (A) into the model system (C), and to control the axial stress provided to the sample by the axial loading system (B), and to collect and process monitoring signals from the model system (C), wherein the monitoring signals include the temperature and pressure monitored by the temperature sensor (c1) and the pressure sensor (c2).

2. The system according to claim 1, characterized in that The input parameters of the gas and liquid injected into the model system (C) by the pore water and gas quantitative injection system (A) include the flow rate, pressure and type of the gas, and the flow rate, pressure, type and pH of the liquid.

3. The system according to claim 1, characterized in that The gas injection part pressurizes the gas stored in the gas cylinder (2) through the static pressure air compressor (1) and the gas booster pump (3) and inputs the pressurized gas into the model system (C).

4. The system according to claim 3, characterized in that A gas storage tank (4) is arranged on the way for gas storage and buffering.

5. The system according to claim 1, characterized in that The liquid injection part increases the pressure of the liquid inside the water tank (5) and inputs it into the model system (C) through a constant speed and constant pressure pump (6).

6. The system according to claim 1, characterized in that The sample (23) is a cylindrical sample formed by crushed stone pressing, with a bottom surface of Φ100 and a height not exceeding 200 mm.

7. The system according to claim 1, characterized in that The axial loading system (B) comprises a servo testing machine.

8. The system according to claim 1, characterized in that The flexible heating sleeve (24) is an asbestos heating and insulation sleeve with a built-in resistance wire heating device; the data collection and processing system (D) is connected to the flexible heating sleeve (24) to control its power supply and temperature to achieve constant temperature heating of the sample (23).

9. The system according to claim 1, characterized in that The outer shell of the model cylinder (25) is made of duplex stainless steel and can withstand temperatures ranging from -50°C to 280°C.

10. The system according to claim 1, characterized in that The upper and lower ends of the model cylinder (25) are both provided with rubber sealing rings (22) for constructing a closed gas-liquid environment.

11. The system according to claim 1, characterized in that The gas injection part and the liquid injection part of the pore water and gas quantitative injection system (A) are both provided with a flow meter (b1) and a pressure gauge (b5) for monitoring the flow and pressure data of the gas and liquid, and transmitting them to the data collection and processing system (D) in real time.

12. The system according to claim 1, characterized in that The data collection and processing system (D) comprises a data collection block (10) and a data collection and processing terminal (11). The data acquisition block (10) includes an analog signal data acquisition module, a MOXAC168H / PCI data acquisition board, and a KL-M4514 acquisition module, and is used to convert the collected monitoring signals into electrical signal data and transmit them to the data collection and processing terminal (11); The data collection and processing terminal (11) comprises a computer terminal and data acquisition control software, and is used for processing the electrical signal data and displaying the measurement results.

13. The system according to claim 1, characterized in that The system also includes a water and gas collection system (E), which is connected to the seepage outlet (27) of the model system (C) and is used to collect waste liquid and waste gas discharged from the model system (C).

14. The system according to claim 13, characterized in that The water and gas collection system (E) reduces the pressure of the waste gas and waste liquid generated by the test of the model system (C) through a vacuum pump (13) and a back-pressure pump (15), and the waste gas and waste liquid flow through a condenser (16), a gas-liquid separator (17), and a low-pressure dryer (18) in sequence, and finally collects the waste liquid and waste gas in a recovery container (20) and a recovery gas cylinder (19).

15. The system according to claim 14, characterized in that The vacuum pump (13) is provided with a buffer container (12).

16. The system according to claim 14, characterized in that The back-pressure pump (15) is provided with a back-pressure container (14).

17. The working method of the system according to claim 1, characterized in that: The following steps are involved: The experimental system constructed realizes the construction of fully enclosed stress field, seepage field, acid-base field and temperature field, and the relevant physical and chemical properties are monitored in real time through the measurement monitoring system; the specific experimental steps are as follows: Step 1: Place the sample placing a sample (23) of a solid waste-based filling material inside a model system (C), and sealing the model system (C); Step 2: Build a multi-field coupling environment According to the experimental design, the input parameters of axial stress, liquid and gas required for the experiment are set through the data collection and processing system (D); Open the pore water and gas quantitative injection system (A), inject liquid and gas into the closed model system (C), and construct the seepage field and pH field environment; Turning on the heating device inside the flexible heating sleeve (24) to heat the sample (23) inside the model system (C) to a set temperature, thereby constructing a temperature field environment; Axial stress is applied through the axis loading system (B) to construct the stress field; Step 3: Test and record data According to the experimental design, the loading is continued until the experimental design time, and the monitoring data of the sample (23) during the test is collected and recorded through the data collection and processing system (D).

18. The method according to claim 17, characterized in that The monitoring data is displayed in a form including images and numerical data.

19. The method according to claim 17, characterized in that The monitoring data includes axial stress and test environment temperature. The axial stress is obtained by monitoring a pressure sensor (c2), and the test environment temperature is obtained by monitoring a temperature sensor (c1).

20. The method according to claim 17, characterized in that The monitoring data also includes fluid stress and gas-liquid flow rate. The fluid stress is obtained by monitoring the pressure gauge (b5), and the gas-liquid flow rate is obtained by monitoring the flow meter (b1).

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