Gas-solid coupling creep disturbance effect testing device

Abstract

The invention discloses a gas-solid coupling creep disturbance effect test device, and belongs to the technical field of rock rheological disturbance tests. Comprising an axial pressurization device, a disturbance impact device, a three-axle box, an axial pressure transmission column, a limiting device, a confining pressure control device and a gas seepage device. The device is high in overall stability and air tightness, can be used for conventional rock uniaxial and triaxial compression creep disturbance tests, and can also be used for gas-solid coupling creep disturbance tests for gas-containing coal rocks. The device meets the requirements of a rock rheological disturbance effect test, and provides an important experimental basis for researching rock mass fracture and damage evolution characteristics under the rheological disturbance condition. According to the pneumatic impact device, the impact weight does not need to be manually lifted to apply impact, and is changed into pneumatic impact, so that the safety and the convenience are remarkably improved. The pneumatic impact load flexibility and controllability are higher, so that researchers can design various different experiment schemes including disturbance of frequency conversion, impact amplitude and duration.

Description

Technical Field

[0001] This invention belongs to the field of rock rheological disturbance testing technology, specifically relating to a gas-solid coupling creep disturbance effect testing device. Background Technology

[0002] As coal mining depths increase, the levels of geostress and gas pressure in the coal seam rise significantly. Simultaneously, dynamic loads from engineering disturbances such as blasting and mining further complicate the mechanisms of coal seam disasters. Studies show that gas pressure is the primary energy source for coal and gas outburst accidents; increased pressure significantly accelerates the creep rate of coal and rock and alters its deformation and failure modes. Furthermore, due to differences in adsorption and permeability, the failure scale of gas-bearing coal seams under dynamic disturbances differs significantly from that of gas-free coal seams. Constrained by the high cost and technical limitations of in-situ testing, in-depth laboratory research into the mechanisms of dynamic disasters such as coal and gas outbursts, objectively analyzing the impact of gas pressure on coal and rock creep characteristics, and considering disturbance conditions such as mining and blasting, is crucial for conducting research on coal and gas outbursts under multi-factor coupling. Therefore, the development of a gas-solid coupled creep disturbance effect test system is particularly important.

[0003] Currently, ① most devices are insufficient to cover the testing requirements under different gas pressure conditions, and their airtightness and system stability are difficult to guarantee under the long-term combined action of different gas pressures and stresses; ② there are few test devices that can realize dynamic and static combined loading of coal and rock under different gas pressure conditions, and cannot take into account the synergistic effect of static and dynamic loads; ③ few devices for dynamic loading tests on gas-bearing coal and rock can accurately control dynamic load parameters, and cannot meet the synergistic loading requirements under different disturbance conditions. For example, the following patents: Patent CN109238921B relates to a test device for rock rheological disturbance effect and step-by-step loading, which achieves disturbance impact by applying an impact ring. Since the disturbance impact applied by the impact ring is a gravity impact load, factors such as the impact height and friction during the test will affect the magnitude of the disturbance impact energy. Furthermore, this device cannot perform gas-solid coupling experiments.

[0004] Patent CN116990160A describes a rock rheological disturbance load device that can simulate the impact of an explosion. It simulates the impact effect of an explosion by having an impact hammer, propelled by high-pressure gas, strike a dynamic sensor. However, it struggles to replicate multiple explosion impacts, resulting in poor experimental flexibility and convenience. Furthermore, this device cannot perform gas-solid coupling experiments.

[0005] Therefore, designing a creep disturbance coupling system that can cover multiple levels of gas pressure and has high airtightness and adjustable dynamic loading parameters remains the key to promoting research on the dynamic failure mechanism of deep coal and rock. Summary of the Invention

[0006] In order to solve the problems of existing gas-solid coupling test devices, which cannot accurately control the disturbances applied and have difficulty in ensuring airtightness and stability during long-term tests, this invention provides a gas-solid coupling creep disturbance effect test device.

[0007] The technical solution adopted in this invention is: A gas-solid coupling creep disturbance effect test device, characterized in that: it includes An axial pressure device is installed above the disturbance and impact device to apply axial pressure to the disturbance and impact device, the axial pressure transmission column, and the coal and rock specimen. The disturbance and impact device is installed above the axial pressure transmission column and is used to apply disturbance and impact to the coal and rock specimens. A three-axis box is used to mount coal and rock specimens; An axial pressure transmission column, mounted on a triaxial box and positioned between the disturbance and impact device and the coal and rock specimen, is used to transmit axial pressure and disturbance impact. A limiting device, installed on the top of the three-axis box, is used to axially limit the axial pressure transmission column; A confining pressure control device, connected to a triaxial chamber, is used to observe changes in the confining pressure inside the triaxial chamber container; The gas seepage device, connected to the triaxial chamber, is used to provide the gas pressure required for the test.

[0008] Compared with the prior art, the present invention has the following advantages: 1. This invention exhibits strong overall stability and airtightness, enabling both conventional uniaxial and triaxial compression creep disturbance tests on rocks, as well as gas-solid coupled creep disturbance tests on gas-bearing coal and rock. This device meets the requirements for testing rock rheological disturbance effects, providing an important experimental basis for studying the fracture and damage evolution characteristics of rock masses under rheological disturbance conditions. This invention eliminates the need for manually lifting impact weights to apply impact, instead using pneumatic impact, which significantly improves safety and convenience.

[0009] 2. Compared to traditional gravity impact loads, the aerodynamic impact loads employed in this invention offer greater flexibility and controllability, allowing researchers to design various experimental schemes, including perturbations of frequency, impact amplitude, and duration. This flexibility not only facilitates comprehensive experimental analysis but also enables a deeper understanding of rock fracture states and their fatigue damage mechanisms. Furthermore, this invention enhances experimental safety, convenience, and controllability, and has broad prospects for scientific research applications, contributing to advancements in related fields.

[0010] 3. By developing a gas-solid coupling creep disturbance effect test device, rheological disturbance tests were conducted on rocks such as gas-bearing coal and rock. The research results help deepen the understanding of the mechanism of coal and gas outbursts, and thus provide theoretical support for outburst early warning and prevention. Through this invention, controllable dynamic and static combined loading (dynamic load is a disturbance impact with adjustable frequency and magnitude; static load is an adjustable axial pressure) and gas pressure are combined to simulate the complex stress environment of deep coal and rock, providing an innovative technical means that is more in line with the actual field conditions for the study of coal and gas outbursts. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the disturbance impact hammer of the present invention; Figure 3 This is a schematic diagram of the integrated sealed chamber of the present invention; Figure 4 This is a schematic diagram of the limiting device structure of the present invention; The components include: 1. Step-by-step loading device; 2. Axial pressure column; 3. Pressure sensor; 4. Gasket; 5. Impact chamber; 6. Disturbance impact hammer; 7. Limiting device; 8. Oil inlet; 9. Axial pressure transmission column; 10. Triaxial box; 11. Coal and rock specimen; 12. Extensometer; 13. Oil discharge port; 14. Base; 15. Triaxial box retainer; 16. Air pump; 17. Frequency modulator; 18. Relay; 19. Pressure regulating valve; 20. Confining pressure. Control system; 21. Gas seepage system; 22. Integrated sealing device; 221. Upper specimen holder; 222. Clamping component; 223. Transparent soft sleeve; 224. Lower specimen holder; 23. Control circuit; 24. Gas duct one; 25. Gas duct two; 26. Confining pressure loading pipeline; 701. Rectangular metal block; 702. High-strength connecting bolt; 703. Nut; 704. Short bolt; 705. Straight groove. Detailed Implementation

[0012] To better understand the purpose, structure, and function of this invention, the invention will be described in further detail below with reference to the accompanying drawings.

[0013] like Figure 1 As shown, a gas-solid coupling creep disturbance effect test device includes... An axial pressure device is installed above the disturbance and impact device to apply axial pressure to the disturbance and impact device, the axial pressure transmission column 9, and the coal and rock specimen 11. The disturbance and impact device is set above the axial pressure transmission column 9 and is used to apply disturbance and impact to the coal and rock specimen 11. Three-axis box 10, used to install coal and rock specimen 11; The axial pressure transmission column 9 is installed on the triaxial box 10 and is located between the disturbance and impact device and the coal and rock specimen 11 to transmit axial pressure and disturbance impact. The limiting device 7 is installed on the top of the three-axis box 10 and is used to limit the axial pressure transmission column 9 axially. A confining pressure control device, connected to the triaxial box 10, is used to observe the changes in confining pressure inside the triaxial box 10 container; The gas seepage device, connected to the triaxial box 10, is used to provide the gas pressure required for the test.

[0014] like Figure 1 As shown, the axial pressure device includes a step-by-step loading device 1, an axial pressure column 2, a pressure sensor 3, and a gasket 4. The axial pressure column 2 provides the long-term static load pressure required for the experiment and acts stably on the coal and rock specimen 11. The test chamber wall has mounting holes at the corresponding positions of the axial pressure column 2 for sliding the axial pressure column 2 up and down, while also radially limiting the axial pressure column 2. The pressure sensor 3 is installed between the axial pressure column 2 and the disturbance impact device. The axial pressure sensor 2 monitors and records the changes in axial pressure in real time.

[0015] A gasket 4 is installed between the axial pressure sensor 2 and the impact chamber 5.

[0016] like Figure 1 As shown, the step-by-step loading device 1 includes a first lever assembly 102, a second lever assembly 104, and a weight 101; the weight 101 is connected to one end of the first lever assembly 102, and the other end of the first lever assembly 102 transmits the load to one end of the second lever assembly 104 through a slider 103. The other end of the second lever assembly 104 contacts the axial pressure column 2 and transmits axial pressure to the axial pressure column 2.

[0017] The test chamber has vertical through-hole slides on its walls, and the slider 103 is installed inside. The lower end of the slider 103 is hinged to one end of the lever of the first lever assembly 102 via a connecting rod. The other end of the lever of the first lever assembly 102 is used to connect the weight 101. The fulcrum of the first lever assembly 102 is set inside the test chamber. The upper end of the slider 103 is hinged to one end of the lever of the second lever assembly 104 via a connecting rod. The other end of the lever of the second lever assembly 104 is hinged to the axial pressure column 2 via a connecting rod. The fulcrum of the second lever assembly 104 is set on the top surface of the test chamber and is located close to the axial pressure column 2.

[0018] The progressive loading device achieves different levels of axial force by adding or subtracting weights, which can provide a continuous and stable axial force compared to traditional hydraulic equipment.

[0019] The progressive loading device 1 employs a progressive loading method of "standard weight 101 - double-stage lever amplification". The maximum axial force can reach 500 kN, and the maximum axial displacement of the axial pressure column 2 is 10 mm. The loading is provided by a 20 kg weight 101 as the initial load, which is amplified sequentially by two stages of levers (each stage amplification ratio of 1:10, total amplification ratio of 100), thereby amplifying the pressure on the coal and rock specimen 11. Each time a 20 kg weight 101 is added, the axial load increment is approximately 19.6 (20 kg × g × 100 ≈ 1.962 × 10). 4 With 25 weights, a maximum axial force of approximately 500 kN can be obtained. To ensure the direction of force application, the two sets of levers and the levers and axial pressure column 2 are connected to the connecting rod via slider 103. Slider 103 is restricted to vertical movement by the slide rail, thus ensuring that the applied force is transmitted in the vertical direction. When the axial pressure column 2 reaches its maximum axial displacement, the maximum lateral displacement of the lower lever end is approximately 180 mm and the maximum vertical displacement is approximately 1017 mm. This mechanism achieves step-by-step loading and stable load holding with adjustable step size and controllable platform through discrete weights 101, which is convenient for synchronization with gas pressure regulation and disturbance events, and is suitable for accurate acquisition of long-term creep and seepage response.

[0020] like Figure 1 As shown, the disturbance impact device includes an impact chamber 5, a disturbance impact hammer 6, an air pump 16, a frequency modulator 17, a relay 18, and a pressure regulating valve 19. The impact chamber 5 is fitted onto the outside of the disturbance impact hammer 6, and the disturbance impact hammer 6 is fixed through the bottom of the impact chamber 5. A through hole is opened at the bottom of the impact chamber 5 for the piston movement of the disturbance impact hammer 6. The air pump 16 is connected to the disturbance impact hammer 6 through an air guide pipe 24. The relay 18 and the pressure regulating valve 19 are installed on the air guide pipe 24. The frequency modulator 17 controls the relay 18 through a control circuit 23.

[0021] When a disturbance impact is performed, the pressure is controlled by the pressure regulating valve 19, the frequency of the disturbance impact is controlled by the frequency modulator 17, and the air pump 16 provides the air pressure required for the impact.

[0022] like Figure 2As shown, the disturbance impact hammer 6 uses an iron shell, which is stronger and less prone to damage even after long-term high-frequency use. The disturbance impact hammer 6 is equipped with a pneumatic connector for connection to the air guide pipe 24, and a base is added to the bottom of the shell. Users can choose a suitable position to fix the base according to experimental needs. Furthermore, the disturbance impact hammer 6 employs an energy storage structure internally. Compressed air is supplied to the disturbance impact hammer 6 by the air pump 16. When the disturbance impact hammer 6 is started, compressed air enters the hammer body, pushing the piston to reciprocate. The piston, pushed by the gas pressure, moves rapidly downwards, striking the tool head and converting kinetic energy into impact energy. The impact energy can be freely adjusted by the pressure regulating valve 19, and the impact frequency can also be controlled by the relay 18. The disturbance impact hammer 6 has no easily damaged components, can stably provide impacts of different amplitudes, has superior overall quality, and is easy to operate. Due to the high efficiency and accuracy of the disturbance impact applied by the disturbance impact hammer 6, the air pressure required by the disturbance impact hammer 6 is provided by the air pump 16, saving time and resources and controlling the overall experimental cost.

[0023] like Figure 1 As shown, multiple limiting devices 7 are installed on the top of the triaxial box 10. Before the test, the axial pressure transmission column 9 is installed and then the limiting devices 7 are connected.

[0024] Each limiting device 7 includes a short bolt 704, a nut 703, a high-strength connecting bolt 702, and a rectangular metal block 701 welded to the top of the three-axis box 10; the rectangular metal blocks 701 of the multiple limiting devices 7 are arranged around the axial pressure transmission column 9, and a straight groove 705 is opened on the top surface of the rectangular metal block 701 facing downward. The high-strength connecting bolt 702 slides up and down along the axial direction of the pressure transmission column 9 and is inserted into the straight groove 705. One end of the high-strength connecting bolt 702 abuts against the pressure transmission column 9. The nut 703 is welded on the top surface of the straight groove 705. The short bolt 704 is arranged along the axial direction of the pressure transmission column 9 and is threadedly connected to the nut 703 to form an axial limit for the high-strength connecting bolt 702.

[0025] like Figure 4 As shown, when the confining pressure control system 20 applies only confining pressure and not axial pressure, the pressure transmission column 9 is clamped by multiple high-strength connecting bolts 702, and the short bolts 704 provide a fixing function. By restricting the upward movement of the high-strength connecting bolts 702, the upward movement of the axial pressure transmission column 9 is restricted, ensuring that it remains in close contact with the integrated sealing device 22, thereby achieving axial limiting. When the axial pressure is applied to a certain level, since there is still a reserved downward displacement space below the transversely arranged high-strength connecting bolts 702 in the straight groove 705 of the limiting device 7, it will not hinder the downward movement of the axial pressure transmission column 9, thus ensuring that the coal and rock specimen 11 can deform normally.

[0026] When confining pressure is applied but axial pressure has not yet been applied, the limiting device 7 effectively restrains the upward movement of the axial pressure transmission column 9, maintaining the relative position of the cavity structure and the seal (maintaining the relative position of the impact chamber 5, the axial pressure transmission column 9, and the integrated sealing device 11 before axial pressure is applied), reducing the risk of leakage due to displacement. When axial pressure is applied and the coal and rock specimen 11 deforms, the limiting mechanism 7 allows the axial pressure transmission column 9 to move downward with the displacement without hindering the transmission of axial pressure (the coal and rock will be compressed under axial pressure until it is destroyed, during which the pressure transmission column 9 will move downward), thus ensuring that the stress can be fully applied to the specimen without excessive restraint. This design takes into account both the requirements of sealing and force transmission, which helps to improve the stability and data reliability of the test under long-term loading conditions.

[0027] like Figure 1 As shown, the triaxial box 10 contains an integrated sealing device 22, an extensometer 12, and a base 14. The integrated sealing device 22 is placed on the upper part of the base 14 and the lower part of the axial pressure transmission column 9. The coal and rock specimen 11 can be placed in its enclosed space. The extensometer 12 is installed on the integrated sealing device 22 to monitor and record the changes in the lateral and axial deformation data of the coal and rock specimen 11.

[0028] like Figure 3 As shown, the integrated sealing device 22 includes an upper specimen holder 221 and a lower specimen holder 224 arranged coaxially; the upper specimen holder 221 and the lower specimen holder 224 are used to axially clamp and initially position the coal and rock specimen 11; a transparent soft sleeve 223 is connected across the outer side of the upper specimen holder 221 and the lower specimen holder 224, and the transparent soft sleeve 223 forms a circumferential covering with the outer circle of the upper specimen holder 221 and the lower specimen holder 224, thereby forming a closed cavity that encloses the coal and rock specimen 11.

[0029] The extensometer 12 is mounted on the transparent soft sleeve 223. Due to the soft nature of the transparent soft sleeve 223, it will not affect the deformation of the coal and rock, nor will it affect the measurement of the extensometer 12. It only serves a sealing function.

[0030] To improve airtightness, a clamping element 222 (such as a worm gear clamp / quick-release clamp) is installed in the overlapping area of ​​the transparent soft sleeve 223 with the upper specimen holder 221 and the lower specimen holder 224 for secondary compression and sealing. This integrated sealing device 22 achieves full circumference sealing of the coal and rock specimen 11 while ensuring visual observation of its state, preventing gas or dust from exchanging with the outside environment. The transparent soft sleeve 223 can deform in tandem with the slight deformation of the coal and rock specimen 11, reducing additional constraints. The clamping element 222 provides adjustable preload force, facilitating disassembly and reuse, and can be adapted to coal and rock specimens 11 of different sizes by changing the length / diameter of the transparent soft sleeve 223.

[0031] like Figure 1 As shown, the confining pressure control device includes a confining pressure control system 20, a three-axis box holder 15, an oil inlet 8, and an oil outlet 13; the three-axis box holder 15 is installed at the bottom of the three-axis box 10 to fix the three-axis box 10, the three-axis box 10 is provided with an oil inlet 8 and an oil outlet 13, and the confining pressure control system 20 is connected to the inside of the three-axis box 10 through a confining pressure loading pipeline 26.

[0032] At the start of the test, a triaxial box holder 15 is installed at the bottom of the triaxial box 10. Then, silicone oil is injected into the triaxial box 10 through the oil inlet 8 (the silicone oil can be injected through the confining pressure control system 20; to improve efficiency, some oil can be manually injected through the oil inlet 8, followed by pressurization to the required test value using the confining pressure control system 20). After the triaxial box 10 is filled with silicone oil, silicone oil is continued to be injected into the triaxial box 10 through the confining pressure control system 20, and the change in confining pressure inside the triaxial box 10 is observed. When the internal confining pressure reaches the test requirements, the oil inlet 8 is closed. After the entire test is completed, the oil outlet 13 is opened to drain the silicone oil.

[0033] The confining pressure control system 20 consists of a dual-cylinder constant speed and constant pressure pump and an MCGS electronic display screen.

[0034] like Figure 1 As shown, the gas seepage device includes a gas seepage system 21; the axial pressure transmission column 9 is located below the disturbance impact hammer 6, and the axial pressure transmission column 9 contains a gas guide pipe that is connected to the gas guide pipe 25 of the gas seepage system 21; the base 14 has a gas guide hole inside for discharging gas.

[0035] Before the test, the air vent of the base 14 is closed, and the inside of the triaxial box 10 is evacuated through the gas seepage system 21. Then, the gas pressure required for the test is set, and gas is introduced into the triaxial box 10. The gas pressure and gas flow data are monitored in real time through the gas seepage system 21.

[0036] The gas seepage system 21 adopts the RLSS-2 coal and rock rheological disturbance effect triaxial seepage experimental device.

[0037] Experimental procedure: 1. First, place the coal and rock specimen 11 inside the integrated sealing device 22, then place it on the base 14, then install the extensometer 12, and move the triaxial box 10 to place it directly below the axial pressure column 2.

[0038] 2. Install the axial pressure transmission column 9 on the upper part of the triaxial box 10, then install the limiting device 7 on the triaxial box 10, and then connect the gas transmission pipe 25 to the axial pressure transmission column 9 to ensure that the internal devices of the triaxial box 10 are tightly connected to form a closed space.

[0039] 3. Open the oil inlet 8 and close the oil outlet 13 to inject silicone oil into the triaxial box 10. When the triaxial box 10 is full of silicone oil, continue to inject silicone oil through the confining pressure control system 20 and monitor the confining pressure value. Stop injecting silicone oil when the required confining pressure for the experiment is reached.

[0040] 4. After the confining pressure stabilizes, according to the design requirements, a specific pressure of seepage gas is set through the gas seepage system 21, and then the coal and rock specimen 11 is fully adsorbed for 24 hours.

[0041] 5. Apply axial static load pressure to the triaxial box 10 through the axial pressure column 2, and monitor the pressure change in real time using the pressure sensor 3.

[0042] 6. After the static load pressure has been applied for a certain period of time, turn on the air pump 16. Set the pressure regulating valve 19 to the relay 18 according to the required impact amplitude for the experiment to obtain the accurate required disturbance impact air pressure. Then, adjust the impact frequency through the relay 17 to perform disturbance impacts at different frequencies. Monitor the axial and longitudinal deformation data of the coal and rock specimen 11 through the extensometer 12.

[0043] 7. After completing the test, unload the axial static load pressure and turn off the air pump 16. Open the oil discharge hole 13 to discharge the oil. After the oil discharge is completed, lift the triaxial box 10 with the air pump 16 and take out the coal and rock specimen 11 from the integrated sealing device 22 inside the triaxial box 10 for further observation and study.

[0044] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A gas-solid coupled creep perturbation effect test device, characterized in that: include An axial pressure device is installed above the disturbance and impact device to apply axial pressure to the disturbance and impact device, the axial pressure transmission column (9), and the coal and rock specimen (11). The disturbance and impact device is set above the axial pressure transmission column (9) and is used to apply disturbance and impact to the coal and rock specimen (11); Three-axis box (10) is used to install coal and rock specimens (11). An axial pressure transmission column (9) is installed on a triaxial box (10) and placed between the disturbance impact device and the coal and rock specimen (11) to transmit axial pressure and disturbance impact. A limiting device (7) is installed on the top of the three-axis box (10) to limit the axial pressure transmission column (9) axially; A confining pressure control device is connected to a triaxial box (10) to observe the changes in confining pressure inside the triaxial box (10) container; A gas seepage device, connected to a triaxial box (10), is used to provide the gas pressure required for the test.

2. The apparatus according to claim 1, wherein: The axial pressure device includes a step-by-step loading device (1), an axial pressure column (2), and a pressure sensor (3). The axial pressure column (2) provides the long-term static load pressure required for the experiment and acts stably on the coal and rock specimen (11). The test chamber wall has mounting holes at the corresponding positions of the axial pressure column (2) for sliding the axial pressure column (2) up and down. The pressure sensor (3) is installed between the axial pressure column (2) and the disturbance impact device. The axial pressure sensor (2) monitors and records the changes in axial pressure in real time.

3. The apparatus of claim 2, wherein: The step-by-step loading device (1) includes a first lever assembly (102), a second lever assembly (104), and a weight (101). The weight (101) is connected to one end of the first lever assembly (102), and the other end of the first lever assembly (102) transmits the load to one end of the second lever assembly (104) through a slider (103). The other end of the second lever assembly (104) contacts the axial pressure column (2) and transmits axial pressure to the axial pressure column (2).

4. The gas-solid coupling creep disturbance effect test device according to claim 2, characterized in that: The disturbance impact device includes an impact chamber (5), a disturbance impact hammer (6), an air pump (16), a frequency modulator (17), a relay (18), and a pressure regulating valve (19). The impact chamber (5) is fitted on the outside of the disturbance impact hammer (6), and the disturbance impact hammer (6) is fixed through the bottom of the impact chamber (5). A through hole for piston movement of the disturbance impact hammer (6) is opened at the bottom of the impact chamber (5). The air pump (16) is connected to the disturbance impact hammer (6) through an air guide pipe (24). A relay (18) and a pressure regulating valve (19) are installed on the air guide pipe (24). The frequency modulator (17) controls the relay (18) through a control circuit (23).

5. The gas-solid coupling creep disturbance effect test device according to claim 4, characterized in that: The disturbance impact hammer (6) is made of iron shell. The disturbance impact hammer (6) is equipped with a pneumatic connector and connected to the air guide pipe (24). A base is added to the bottom of the shell of the disturbance impact hammer (6).

6. The gas-solid coupling creep disturbance effect test device according to claim 4, characterized in that: Multiple limiting devices (7) are installed on the top of the triaxial box (10). Each limiting device (7) includes a short bolt (704), a nut (703), a high-strength connecting bolt (702), and a rectangular metal block (701) welded to the top of the three-axis box (10); the rectangular metal blocks (701) of the multiple limiting devices (7) are arranged around the axial pressure transmission column (9), and the top surface of the rectangular metal block (701) is provided with a straight groove (705) facing downward. The high-strength connecting bolt (702) slides up and down along the axial direction of the pressure transmission column (9) and is inserted into the straight groove (705). One end of the high-strength connecting bolt (702) abuts against the pressure transmission column (9), and the nut (703) is welded on the top surface of the straight groove (705). The short bolt (704) is arranged along the axial direction of the pressure transmission column (9) and is threadedly connected to the nut (703) to form an axial limit on the high-strength connecting bolt (702).

7. The gas-solid coupling creep disturbance effect test device according to claim 4, characterized in that: The triaxial box (10) contains an integrated sealing device (22), an extensometer (12), and a base (14). The integrated sealing device (22) is placed on the upper part of the base (14) and the lower part of the axial pressure transmission column (9). The coal and rock specimen (11) can be placed in its enclosed space. An extensometer (12) is installed on the integrated sealing device (22) to monitor and record the changes in the lateral and axial deformation data of the coal and rock specimen (11).

8. The gas-solid coupling creep disturbance effect test device according to claim 7, characterized in that: The integrated sealing device (22) includes an upper specimen holder (221) and a lower specimen holder (224) arranged coaxially. The upper specimen holder (221) and the lower specimen holder (224) are used to axially clamp and preliminarily position the coal and rock specimen (11). A transparent soft sleeve (223) is connected across the outer side of the upper specimen holder (221) and the lower specimen holder (224). The transparent soft sleeve (223) and the outer circle of the upper specimen holder (221) and the lower specimen holder (224) form a circumferential covering, thereby forming a closed cavity that encloses the coal and rock specimen (11).

9. The gas-solid coupling creep disturbance effect test device according to claim 7, characterized in that: The confining pressure control device includes a confining pressure control system (20), a three-axis box holder (15), an oil inlet (8), and an oil outlet (13); the three-axis box holder (15) is installed at the bottom of the three-axis box (10) to fix the three-axis box (10), the three-axis box (10) is provided with an oil inlet (8) and an oil outlet (13), and the confining pressure control system (20) is connected to the inside of the three-axis box (10) through a confining pressure loading pipeline (26).

10. The gas-solid coupling creep disturbance effect test device according to claim 7, characterized in that: The gas seepage device includes a gas seepage system (21); the axial pressure transmission column (9) is located below the disturbance impact hammer (6), and the axial pressure transmission column (9) contains a gas guide pipe that is connected to the gas guide pipe two (25) of the gas seepage system (21). The base (14) has an open gas guide hole for discharging gas.

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