Experimental device for simulating mine earthquake induced by movement of water-containing weakly cemented rock stratum

Abstract

The utility model relates to the technical field of similar simulation experiment equipment, and discloses an experiment device for simulating mine earthquakes induced by movement of a water-containing weakly cemented rock stratum, which comprises a frame body, two movable plate bodies vertically arranged on the frame body and a pressing plate horizontally arranged on the frame body, the two movable plate bodies are in sliding fit with the frame body in the horizontal direction, and the pressing plate is arranged on the frame body. The two movable plate bodies, the pressing plate and a bottom plate of the frame body form a sample chamber for accommodating a rock sample, and the two groups of transverse pressure applying mechanisms are symmetrically arranged on the outer sides of the two movable plate bodies; each group of transverse pressure applying mechanism comprises a horizontal displacement assembly and a pressure applying end part connected to the horizontal displacement assembly, and the horizontal displacement assembly drives the pressure applying end part to move in the direction close to the movable plate body so as to apply pressure in the horizontal direction to the movable plate body. The dynamic pressure change condition of the weakly cemented rock stratum can be truly simulated, and the method has important significance for exploring the law and solving problems.

Description

Technical Field

[0001] This utility model relates to the field of similar simulation experimental equipment technology, and in particular to an experimental device for simulating the mining tremors induced by the activity of water-bearing weakly cemented rock strata. Background Technology

[0002] In some western regions, during coal mining operations, the phenomenon of softening rocks after being exposed to water is frequently observed underground. This is because these rock formations contain a large amount of hydrophilic clay minerals, resulting in poor cementation, low strength, and a tendency to become muddy and disintegrate upon contact with water. Therefore, when mining in such rock formations, if the roadway is exposed to water, production accidents such as roof falls, collapses, and floor heaves are highly likely to occur, seriously threatening the lives of mine workers and affecting the efficient mining of coal.

[0003] In studying the dynamic pressure variation of weakly cemented rock strata under water-sprinkling conditions, we need to conduct similar simulation experiments to observe the geological movement patterns in the mining area. Commonly used simulation devices mainly consist of a sample chamber, a vertical loading component, sensors, and a control system. The working principle is as follows: the control system applies a vertical force to the sample placed in the sample chamber using the vertical loading component. Then, water is manually sprinkled into the sample chamber to simulate the experiment. The sensor captures the data changes and feeds them back to the control system. The lateral stress on the sample is mainly obtained through simple numerical simulation and theoretical calculation. However, the results of numerical simulation and theoretical calculation are based on theoretical formulas and are too idealized, which deviates from the real situation and leads to errors in the subsequent experimental data. Utility Model Content

[0004] To address the aforementioned technical problems, this invention provides an experimental device for simulating mine tremors induced by the activity of water-bearing, weakly cemented rock strata. This device can realistically simulate the dynamic pressure changes in weakly cemented rock strata, which is of great significance for exploring its patterns and solving the problems.

[0005] This invention provides an experimental device for simulating mine tremors induced by the activity of water-bearing, weakly cemented rock strata. The device includes: a frame, two movable plates vertically mounted on the frame, and a pressure plate horizontally mounted on the frame. The two movable plates slide in a horizontal manner with the frame. The two movable plates, the pressure plate, and the bottom plate of the frame form a sample chamber for accommodating rock samples. The device also includes two sets of transverse pressure mechanisms symmetrically arranged on the outer sides of the two movable plates. Each transverse pressure mechanism includes: a horizontal displacement component and a pressure-applying end connected to the horizontal displacement component. The horizontal displacement component drives the pressure-applying end to move towards the movable plates, thereby applying horizontal pressure to the movable plates.

[0006] Optionally, a spring connects the movable plate to the corresponding fixed side plate on the frame.

[0007] Optionally, each horizontal displacement assembly includes: a pressure frame and a screw jack. The pressure frame is fixed to the outside of the frame, the fixed end of the screw jack is fixed to the pressure frame, the pressure end is fixed to the moving end of the screw jack, and the screw jack is connected to a motor.

[0008] Optionally, the pressure plate includes two parallel protective bars and multiple connecting bars connected between the two protective bars. Both ends of the protective bars pass through the corresponding movable plate and are connected to the fixed side plate of the frame. The protective bars and the fixed side plate slide in a vertical direction.

[0009] Optionally, a sliding guide rail is fixed on the fixed side plate, and the protective bar slides with the sliding guide rail. The side wall of the sliding guide rail has multiple round holes, and the guide rail plug passes through the round holes to abut against the protective bar to fix the protective bar.

[0010] Optionally, a water tank is connected to the top of the guard bar, with a gap between them. The water tank and the guard bar are connected by a connecting column, and the water tank has a seepage hole.

[0011] Optionally, a drip tube is connected to the lower end of the seepage hole, and a control valve is connected inside the drip tube to regulate the flow rate of the drip tube. The water tank also has a drain hole.

[0012] Optionally, the water tank can be made of carbon fiber.

[0013] Optionally, an acoustic emission probe is connected to the rock sample, and a strain gauge is connected to the bottom of the rock sample. Both the acoustic emission probe and the strain gauge are connected to the control system.

[0014] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0015] This invention provides an experimental apparatus for studying mine-induced tremors in water-bearing, weakly cemented rock strata. The apparatus comprises two movable plates, a frame base, and a pressure plate, forming a sample chamber to hold the rock sample. Two movable plates are vertically mounted on the frame, and lateral pressure mechanisms are located on both sides of the movable plates. During the experiment, a horizontal displacement component pushes the pressure-applying end to compress the movable plates, thereby applying a lateral load to the rock sample. A vertical load is applied to the pressure plate, realistically simulating the stress conditions of the rock sample. This apparatus can simulate the changes in rock strata movement and mine pressure under conditions of water seepage and internal horizontal forces and upper pressure in weakly cemented rocks. This is of significant research value for studying the laws governing mine-induced tremors under water seepage and solving related problems. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of an experimental device for simulating mine tremors induced by the activity of water-bearing weakly cemented rock strata, provided for an embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the water tank provided in an embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the dropper provided in an embodiment of the present utility model;

[0019] Figure 4 A partial structural schematic diagram of the sliding guide rail provided in an embodiment of this utility model;

[0020] Figure 5 A schematic diagram of the overall structure of the transverse pressure application mechanism provided in this embodiment of the utility model;

[0021] Figure 6 A front view of the lateral pressure application mechanism provided in an embodiment of this utility model;

[0022] Figure 7 Left view of the lateral pressure applying mechanism provided in an embodiment of this utility model;

[0023] Figure 8 A top view of the lateral pressure application mechanism provided in an embodiment of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Frame; 3. Lateral pressure application mechanism; 4. Control system; 5. Rock sample; 101. Water tank; 102. Protective bar; 103. Sliding guide rail; 104. Pin hole; 105. Fixed side plate; 106. Base plate; 107. Wall panel support; 108. Fixed hinge support; 109. Spring; 110. Movable plate; 111. Drip tube; 112. Seepage hole; 113. Control valve; 114. Drain hole; 115. Guide rail plug; 116. Circular hole; 201. Acoustic emission probe; 202. Strain gauge; 301. Pressure application frame; 302. Pressure application base; 303. Screw jack; 304. Electric motor; 305. Wire. Detailed Implementation

[0026] The following describes a specific embodiment of the present invention in detail with reference to the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Currently, in the experimental setup for simulating mine tremors induced by the activity of water-bearing weakly cemented rock strata, the transverse stress on the sample is mainly obtained through simple numerical simulation and theoretical calculation. However, the results of numerical simulation and theoretical calculation are based on theoretical formulas, which are too idealized and deviate from the real situation, leading to errors in the subsequent experimental data.

[0029] Therefore, this utility model provides an experimental device for simulating the mining tremors induced by the activity of water-bearing weakly cemented rock strata. It can realistically simulate the dynamic pressure changes of weakly cemented rock strata, which is of great significance for exploring its laws and solving problems.

[0030] At least one embodiment of this utility model provides an experimental device for simulating mine tremors induced by the activity of water-bearing weakly cemented rock strata, comprising: a frame, two movable plates vertically arranged on the frame, and a pressure plate horizontally arranged on the frame. The two movable plates and the frame slide in a horizontal direction. The two movable plates, the pressure plate, and the bottom plate of the frame form a sample chamber for accommodating rock samples. The device also includes two sets of transverse pressure applying mechanisms symmetrically arranged on the outer sides of the two movable plates. Each set of transverse pressure applying mechanisms includes: a horizontal displacement component and a pressure applying end connected to the horizontal displacement component. The horizontal displacement component drives the pressure applying end to move towards the movable plates, thereby applying horizontal pressure to the movable plates.

[0031] In the experimental device for simulating the activity of water-bearing weakly cemented rock strata and inducing mine tremors provided in the above-described embodiment of the present invention, the horizontal displacement component pushes the pressure end to squeeze the movable plate, thereby applying a lateral load to the rock sample. By applying a vertical load to the pressure plate, the stress condition of the rock sample is realistically simulated.

[0032] The present invention will be described below through several specific embodiments. To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and components may be omitted. When any component of an embodiment of the present invention appears in more than one drawing, the component may be represented by the same reference numerals in each drawing.

[0033] refer to Figure 1 , Figure 1 A schematic diagram of the overall structure of an experimental device for simulating mine tremors induced by the activity of water-bearing, weakly cemented rock strata, provided for an embodiment of this utility model, is shown below. Figure 1 As shown, this utility model embodiment provides an experimental device for simulating the activity of water-bearing weakly cemented rock strata that induces mine tremors. The device includes: a frame 1, which serves as the main support structure of the experimental device and is made of high-strength steel to ensure the stability of the device under high-pressure conditions; a base plate at the bottom of the frame 1 to support the entire experimental device; two movable plates 110 vertically mounted on the frame 1; and a pressure plate horizontally mounted on the frame 1 to apply vertical pressure to the rock sample 5. The two movable plates 110 slide in a horizontal fit with the frame 1. The two movable plates 110, the pressure plate, and the base plate 106 of the frame 1 form a sample chamber for accommodating the rock sample 5. The size of the sample chamber can be adjusted according to experimental requirements to accommodate rock samples of different sizes. The sealed design of the sample chamber ensures that no water leakage occurs during the experiment, thus simulating a real water-bearing rock strata environment. The inner side of the movable plate 110 contacts the rock sample 5 to simulate the deformation and fracture of the rock strata under horizontal stress. It also includes two sets of transverse pressure mechanisms 3 symmetrically arranged on the outer sides of the two movable plates 110. Each transverse pressure mechanism 3 includes a horizontal displacement component and a pressure-applying end connected to the horizontal displacement component. The horizontal displacement component drives the pressure-applying end to move closer to the movable plate 110, thereby applying horizontal pressure to the movable plate 110. The pressure magnitude and speed of the transverse pressure mechanism 3 can be precisely adjusted by the control system 4 to simulate rock strata activity under different stress conditions. The pressure-applying end, which is in direct contact with the movable plate 110, is made of wear-resistant material to ensure that it will not be damaged by friction during long-term experiments. Driven by the horizontal displacement component, the pressure-applying end applies uniform horizontal pressure to the movable plate 110 to simulate the deformation and fracture of the rock strata under horizontal stress. The control system 4 is connected to the transverse pressure mechanism for real-time monitoring and adjustment of experimental parameters.

[0034] During the experiment, rock sample 5 was first placed in the sample chamber and vertical pressure was applied by the pressure plate. Then, the transverse pressure mechanism 3 was activated to apply horizontal pressure to the movable plate 110 to simulate the deformation and fracture of the rock strata under horizontal stress.

[0035] This invention provides an experimental apparatus for studying mine-induced tremors in water-bearing, weakly cemented rock strata. The apparatus comprises two movable plates, a frame base, and a pressure plate, forming a sample chamber to hold the rock sample. Two movable plates are vertically mounted on the frame, and lateral pressure mechanisms are located on both sides of the movable plates. During the experiment, a horizontal displacement component pushes the pressure-applying end to compress the movable plates, thereby applying a lateral load to the rock sample. A vertical load is applied to the pressure plate, realistically simulating the stress conditions of the rock sample. This apparatus can simulate the changes in rock strata movement and mine pressure under conditions of water seepage and internal horizontal forces and upper pressure in weakly cemented rocks. This is of significant research value for studying the laws governing mine-induced tremors under water seepage and solving related problems.

[0036] Refer again Figure 1 A spring 109 connects the movable plate 110 to the corresponding fixed side plate 105 on the frame 1. The spring 109 helps maintain the stability of the horizontal moving component, ensuring that the movable plate 110 automatically resets when no force is applied, quickly returning to its normal working state. At the same time, the spring 109 can also reduce the impact of the pressure end on the movable plate 110, extend the service life of the movable plate 110, and reduce the impact of loader vibration and noise on the experiment. The bottom of the frame 1 is provided with a base plate 106 and a wall panel support 107. The base plate 106 is supported by a fixed hinge support 108, and the wall panel support 107 is fixedly connected to the fixed side plate 105.

[0037] refer to Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8 ,in, Figure 5 This is a schematic diagram of the overall structure of the lateral pressure application mechanism provided in an embodiment of the present invention. Figure 6 This is a front view of the lateral pressure application mechanism provided in an embodiment of the present invention. Figure 7 The left view of the lateral pressure applying mechanism provided in this embodiment of the utility model. Figure 8This is a top view of the lateral pressure applying mechanism provided in this embodiment of the utility model. Each set of horizontal displacement components includes: a pressure applying frame 301, fixed to the outside of the frame 1; a screw jack 303, with its fixed end fixed to the pressure applying frame 301 and its pressure applying end fixedly connected to the moving end of the screw jack 303; the screw jack 303 is connected to a motor 304. It should be understood that the screw jack 303 is located at the middle point of the pressure applying frame 301 and connected through a pressure applying base 302. The motor 304 is connected to the screw jack 303 through a wire 303 and is located below the screw jack 303. Compared with other displacement components, the screw jack 303 has a simple and stable structure and is easy to maintain. Hydraulic cylinders can usually only apply force axially and have limited load capacity for lateral forces, while the screw jack is flexible in its direction of use and has a strong load capacity. The pressure applying frame 301 and the pressure applying base 302 can stably support the screw jack 303 and adjust the position of its pressure applying point.

[0038] refer to Figure 2 , Figure 2 A schematic diagram of the structure of the water tank provided in the embodiment of this utility model is shown below. Figure 2 As shown, in this embodiment, the pressure plate includes two parallel protective bars 102 and multiple connecting bars connecting the two protective bars 102. Both ends of the protective bars 102 pass through the corresponding movable plate 110 and are connected to the fixed side plate 105 of the frame 1. The protective bars 102 and the fixed side plate 105 slide in a vertical direction. The pressure plate is a key component in the experimental apparatus used to apply vertical pressure to the rock sample 5. The design of the pressure plate not only needs to ensure the uniformity and stability of the applied pressure, but also needs to have sufficient strength and wear resistance to cope with the high pressure and friction that may be generated during the experiment. The protective bars 102 are made of high-strength alloy steel, which has excellent compressive and bending resistance and can withstand the high pressure load generated during the experiment. The connecting bars are evenly distributed between the two protective bars 102 to enhance the overall rigidity and stability of the pressure plate, ensuring that the pressure can be evenly transmitted to the surface of the rock sample 5. Both ends of the protective bars 102 pass through the corresponding movable plate 110 and are connected to the fixed side plate 105 of the frame 1. The protective bar 102 and the movable plate 110 achieve relative movement through a sliding fit, ensuring that when vertical pressure is applied, the protective bar 102 can move smoothly in the vertical direction without interfering with the horizontal movement of the movable plate 110.

[0039] refer to Figure 4 , Figure 4 A partial structural diagram of the sliding guide rail provided in an embodiment of this utility model is shown below. Figure 4As shown, in this embodiment, a sliding guide rail 103 is fixed on the fixed side plate 105. The protective bar 102 is slidably engaged with the sliding guide rail 103. The side wall of the sliding guide rail 103 has multiple round holes 116. The guide rail plug 115 passes through the round holes 116 and abuts against the protective bar 102 to fix the protective bar 102. The protective bar 102 and the fixed side plate 105 are slidably engaged in the vertical direction through the sliding guide rail 103, which prevents the movable plate 110 from deviating from its track during the movement of the pressure plate 110 and causing mechanical accidents. The sliding guide rail 103 is fixed on the fixed side plate 105. The two ends of the protective bar 102 are embedded in the sliding guide rail 103 and can slide freely in the vertical direction within the guide rail. It should be understood that the fixed side plate 105 has multiple pin holes 104 at corresponding positions. The guide rail plug 115 first passes through the pin holes 104 and then through the round holes 116 to abut against the protective bar 102. The design of the sliding guide rail 103 ensures that the protective bar 102 remains stable during movement, avoiding uneven pressure caused by friction or vibration. The contact surface between the protective bar 102 and the sliding guide rail 103 is coated with lubricant to reduce frictional resistance and ensure smooth movement of the pressure plate.

[0040] Considering the problem that existing simulation devices suffer from difficulty in precisely controlling the location and speed of water spraying due to artificial water spraying.

[0041] Refer again Figure 2 A water tank 101 is connected above the protective bar 102, with a gap between them. The water tank 101 and the protective bar 102 are connected by a connecting post, and the water tank 101 has a seepage hole 112. In this embodiment, the water in the water tank 101 can drip directly onto the rock sample 5 through the seepage hole 112 via the connecting post, simulating water spraying conditions. Simultaneously, the water tank 101 in this embodiment can replace the vertical loading component. By adjusting the water volume in the water tank 101, the overall weight of the water tank 101 can be adjusted, thereby regulating the magnitude of the vertical force. It should be understood that the connecting post should be evenly positioned above the rock sample 5 to apply a relatively stable vertical force to the rock sample 5. The protective bar 102 facilitates adjustment of the stacking height of the rock sample 5, ensuring sufficient vertical force is applied to the rock sample 5.

[0042] refer to Figure 3 , Figure 3 A schematic diagram of the dropper provided in the embodiment of this utility model is shown below. Figure 3As shown, in this embodiment, a drip tube 111 is connected to the lower end of the seepage hole 112. A control valve 113 is connected inside the drip tube 111 to regulate the flow rate of the drip tube 111. The dripping rate of the drip tube 111 can be controlled by the control valve 113 to achieve more precise water spraying control. The water tank 101 also has a drain hole 114. The drain hole 114 is located on the lower side of the water tank 101. Its function is to drain the water inside the water tank 101 after the experiment by connecting a water pipe to the drain hole 114, which is convenient for the next experiment. The connecting rod can provide enough space for the drip tube 111 to drip water and prevent the water tank 101 from contacting the rock sample 5 and damaging the drip tube 111.

[0043] Specifically, water tank 101 is made of carbon fiber, which has high hardness and ensures that it will not be damaged during the experiment.

[0044] Refer again Figure 1 The detection device 2 includes an acoustic emission probe 201, an amplifier, an acoustic emission signal receiving system, a strain gauge 202, and a stress-strain device. The acoustic emission probe 201 is connected to the rock sample 5. The acoustic emission probe 201 is connected to the amplifier via a detachable spiral-connected wire. The acoustic emission probe 201 is used to monitor the generation and propagation of internal cracks in the rock sample 5 under stress, and to collect changes in internal strain energy during the fracture process. It is in contact with the rock sample 5 and measures the horizontal energy changes within the rock. A strain gauge 202 is connected to the bottom of the rock sample 5. The strain gauge 202 is used to measure the deformation of the rock sample 5 during the experiment, mainly surface changes. Because the force is a horizontal loading force, the probe should be placed perpendicular to the force direction. Both the acoustic emission probe 201 and the strain gauge 202 are connected to the control system 4.

[0045] The control system 4 includes a power supply, a PLC control system, an acoustic emission signal receiving system, and a stress-strain device. The control system 4 is based on PLC control to program and precisely receive the acoustic emission signal and the stress-strain device.

[0046] This utility model provides an experimental device for simulating mine tremors induced by the activity of weakly cemented water-bearing rock strata. The device uses a PLC to precisely control the transverse pressure mechanism 3, the acoustic emission probe 201, and the strain gauge 202. It can simulate the changes in rock strata movement and mine pressure under the conditions of horizontal force and upper pressure inside the rock strata in weakly cemented rock under water-sprinkling conditions. It can observe the mine tremor energy and stress-strain changes, which helps to study the law of mine tremors induced by the roof under water-sprinkling.

[0047] The above-described embodiments are merely a few specific examples of this utility model. However, the embodiments of this utility model are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of this utility model.

Claims

1. An experimental apparatus for simulating mine tremors induced by the activity of water-bearing, weakly cemented rock strata, characterized in that, include: The frame (1) includes two movable plates (110) vertically mounted on the frame (1) and a pressure plate horizontally mounted on the frame (1). The two movable plates (110) slide in cooperation with the frame (1) in the horizontal direction. The two movable plates (110), the pressure plate, and the bottom plate (106) of the frame (1) form a sample chamber for accommodating the rock sample (5). The frame also includes two sets of transverse pressure mechanisms (3) symmetrically arranged on the outside of the two movable plates (110). Each of the lateral pressure mechanisms (3) includes: a horizontal displacement assembly and a pressure end connected to the horizontal displacement assembly, wherein the horizontal displacement assembly drives the pressure end to move toward the movable plate (110) to apply horizontal pressure to the movable plate (110).

2. The experimental apparatus for simulating mine tremors induced by the activity of weakly cemented water-bearing strata as described in claim 1, characterized in that, A spring (109) is connected between the movable plate (110) and the fixed side plate (105) on the corresponding side of the frame (1).

3. The experimental apparatus for simulating mine tremors induced by the activity of weakly cemented water-bearing strata as described in claim 1, characterized in that, Each group of the horizontal displacement components includes: The pressure frame (301) is fixed to the outside of the frame (1); The screw jack (303) has a fixed end that is fixed to the pressure frame (301), and the pressure end that is fixed to the moving end of the screw jack (303). The screw jack (303) is connected to the motor (304).

4. The experimental apparatus for simulating mine tremors induced by the activity of weakly cemented water-bearing strata as described in claim 1, characterized in that, The pressure plate includes two parallel protective bars (102) and multiple connecting bars connected between the two protective bars (102). Both ends of the protective bars (102) pass through the corresponding movable plate (110) and are connected to the fixed side plate (105) of the frame (1). The protective bars (102) and the fixed side plate (105) slide in the vertical direction.

5. The experimental apparatus for simulating mine tremors induced by the activity of weakly cemented water-bearing strata as described in claim 4, characterized in that, A sliding guide rail (103) is fixed on the fixed side plate (105). The protective bar (102) slides with the sliding guide rail (103). The side wall of the sliding guide rail (103) has multiple round holes (116). The guide rail plug (115) passes through the round holes (116) and abuts against the protective bar (102) to fix the protective bar (102).

6. The experimental apparatus for simulating mine tremors induced by the activity of weakly cemented water-bearing strata as described in claim 4, characterized in that, A water tank (101) is connected above the protective bar (102), and there is a gap between the two. The water tank (101) and the protective bar (102) are connected by a connecting column. The water tank (101) has a seepage hole (112).

7. The experimental apparatus for simulating mine tremors induced by the activity of weakly cemented water-bearing strata as described in claim 6, characterized in that, The lower end of the seepage hole (112) is connected to a drip tube (111), and a control valve (113) is connected inside the drip tube (111) to regulate the flow rate of the drip tube (111). The water tank (101) is also provided with a drain hole (114).

8. The experimental apparatus for simulating mine tremors induced by the activity of weakly cemented water-bearing strata as described in claim 6, characterized in that, The water tank (101) is made of carbon fiber.

9. The experimental apparatus for simulating mine tremors induced by the activity of weakly cemented water-bearing strata as described in claim 1, characterized in that, An acoustic emission probe (201) is connected to the rock sample (5), and a strain gauge (202) is connected to the bottom of the rock sample (5). The acoustic emission probe (201) and the strain gauge (202) are both connected to the control system (4).

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