An indoor fault activation simulation test device

Abstract

This invention discloses an indoor fault activation simulation test device, which includes a confining pressure chamber and a simulation chamber disposed inside the confining pressure chamber. Compared with the prior art, the indoor fault activation simulation test device of this invention can simulate complex engineering disturbances and real deep stress environment conditions, as well as simulate the dynamic-static coupling effect in engineering activities. It can be used to study the impact of engineering activities such as injection fracturing in shale gas extraction on fault stability and how engineering disturbances induce deep fault activation mechanisms, while providing key data for mechanisms such as earthquake nucleation and fracture propagation processes.

Description

Technical Field

[0001] This invention relates to the field of mechanical testing technology, and in particular to an indoor fault activation simulation test device. Background Technology

[0002] my country's shale gas production has shown a significant upward trend, with unconventional natural gas accounting for an increasingly larger proportion of the country's total natural gas production. However, shale gas extraction still faces challenges, such as complex geological conditions and high extraction costs. Furthermore, shale gas extraction also brings problems, such as environmental pollution, including water pollution. Injection fracturing is a key step in shale gas extraction, using high-pressure injected fluids to create a network of fractures in the shale formation to increase shale gas production. However, this process can alter the stress state of the formation, thereby activating faults and inducing earthquakes. Indoor fault activation simulation experiments are crucial for the safe and efficient extraction of underground renewable energy sources such as shale gas, and for predicting and preventing seismic activity that may be induced during shale gas extraction. These experiments play an important role in understanding the relationship between injection fracturing and induced earthquakes in shale gas extraction, predicting earthquake risks, optimizing extraction strategies, and providing theoretical support. Through these experiments, researchers can better understand the behavior of faults under complex stress conditions, providing scientific guidance for the safe and efficient development of shale gas. Deep faults are located in a high-stress environment, where engineering activities cause significant disturbances, exhibit dynamic-static coupling characteristics, and involve high and frequently changing fluid injection pressures.

[0003] Currently, research teams both domestically and internationally primarily employ conventional rock mechanics shear testing equipment or conventional triaxial rock mechanics testing equipment to conduct experimental research on related mechanisms. However, existing testing equipment cannot accurately simulate complex engineering disturbances and real deep stress environments, hindering breakthroughs in the mechanism of deep fault activation induced by engineering disturbances. There is an urgent need to develop a simulator for deep fault activation induced by complex engineering disturbances, enabling breakthroughs in fundamental issues and technical bottlenecks through experimental research, thereby providing support for resource and energy production capacity assurance.

[0004] Therefore, how to provide an indoor fault activation simulation test device that can accurately simulate complex engineering disturbances and real deep stress environment conditions, and create conditions for breakthroughs in the mechanism of deep fault activation induced by engineering disturbances, is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the fact that existing technologies cannot accurately simulate complex engineering disturbances and real deep stress environment conditions, which restricts breakthroughs in the mechanism of deep fault activation induced by engineering disturbances, the technical problem to be solved by the present invention is to provide an indoor fault activation simulation test device to accurately simulate complex engineering disturbances and real deep stress environment conditions, thereby creating conditions for breakthroughs in the mechanism of deep fault activation induced by engineering disturbances.

[0006] To achieve the above objectives, the present invention provides an indoor fault activation simulation test device, comprising a confining pressure chamber and a simulation chamber disposed inside the confining pressure chamber. The simulation chamber includes: a sample chamber, which has a cylindrical structure and a accommodating space in the middle; four arc-shaped pads on the outer side of the chamber, each of which has an arc-shaped plate structure, one arc surface of each of which is adapted to the cylindrical outer wall of the sample chamber, and the other arc surface of each of which has a fixing groove; the four arc-shaped pads are evenly spaced on the cylindrical outer wall of the sample chamber; and a vertical force transmission column, one end of which is connected to the first The fixing grooves of the outer arc-shaped pads abut against each other; two lateral force transmission columns, one end of the lateral force transmission column abuts against the fixing groove of the second outer arc-shaped pad, and one end of the other lateral force transmission column abuts against the fixing groove of the third outer arc-shaped pad; the two lateral force transmission columns are symmetrically arranged; two chamber covers, each chamber cover having a force transmission column through hole, the two chamber covers being fixedly connected to both ends of the sample chamber respectively; a constant confining pressure shear force transmission column, one end of the constant confining pressure shear force transmission column passing through the through hole of one force transmission column and abutting against the lower part of one end of the sample chamber; a constant confining pressure offset force transmission column, one end of the constant confining pressure offset force transmission column passing through the through hole of the other force transmission column and abutting against the lower part of the other end of the sample chamber.

[0007] In the first aspect, the simulation chamber further includes: an oversized heat-shrinkable sleeve, the oversized heat-shrinkable sleeve having a cylindrical structure, the oversized heat-shrinkable sleeve being fitted around the periphery of the sample chamber; two force transmission column fixing frames, each of the force transmission column fixing frames having a cylindrical structure, the two force transmission column fixing frames being symmetrically arranged, one force transmission column fixing frame being fixed to the lower part of one chamber cover, and the other force transmission column fixing frame being fixed to the lower part of another chamber cover; each force transmission column fixing frame having a sliding space, the other end of the constant confining pressure shear force transmission column being located in one of the sliding spaces and slidably connected to one force transmission column fixing frame, and the other end of the constant confining pressure adaptive force transmission column being located in another of the sliding spaces and slidably connected to another force transmission column fixing frame; a tangential loading rod, one end of the tangential loading rod being fixedly connected to the other end of the constant confining pressure shear force transmission column; and an adaptive loading rod, one end of the adaptive loading rod being fixedly connected to the other end of the constant confining pressure adaptive force transmission column.

[0008] In the first aspect, the sample chamber includes: two vertical arc-shaped pads, the two vertical arc-shaped pads being symmetrically spaced apart, one arc surface of the first outer arc-shaped pad fitting to the outer side wall of one of the vertical arc-shaped pads, and one arc surface of the second outer arc-shaped pad fitting to the outer side wall of the other vertical arc-shaped pad; two lateral arc-shaped pads, the two lateral arc-shaped pads being located between the two vertical arc-shaped pads, the two lateral arc-shaped pads being symmetrically spaced apart; and a third lateral chamber. One arc surface of the outer arc-shaped pad is adapted to the outer side wall of one of the lateral arc-shaped pads, and one arc surface of the fourth lateral outer arc-shaped pad is adapted to the outer side wall of another lateral arc-shaped pad; wherein, the circle containing the outer side wall of each vertical arc-shaped pad has the same diameter as the circle containing the outer side wall of each lateral arc-shaped pad; two vertical arc-shaped pads and two lateral arc-shaped pads enclose a through space, the through space having a cubic structure; the two compartment covers are respectively located in the through space. At both ends of the through space, the inner wall of one of the compartment covers is fixedly connected to one end of each of the two vertical arc-shaped pads and one end of each of the two lateral arc-shaped pads, respectively; the inner wall of the other compartment cover is fixedly connected to the other ends of each of the two vertical arc-shaped pads and the other ends of each of the two lateral arc-shaped pads, respectively. The simulated compartment also includes two first polytetrafluoroethylene (PTFE) plates and four second PTFE plates. The two first PTFE plates are adapted to the two compartment covers respectively, and each first PTFE plate has a through hole in the middle that is adapted to the through space. One first PTFE plate is located inside one of the compartment covers and abuts against the two vertical arc-shaped pads and the two lateral arc-shaped pads respectively. Another first PTFE plate is located inside another compartment cover and abuts against the two vertical arc-shaped pads and the two lateral arc-shaped pads respectively. Each second PTFE plate is arranged between any one of the lateral arc-shaped pads and a corresponding one of the vertical arc-shaped pads.

[0009] In the first aspect, the sample chamber further includes: two upper rectangular pads, each of which has a cubic structure and is located within the through space, with the two upper rectangular pads symmetrically arranged at both ends of the through space; and two lower rectangular pads, each of which has a cubic structure and is located within the through space, with the two lower rectangular pads symmetrically arranged at both ends of the through space; each lower rectangular pad is located below each upper rectangular pad, so that the two upper rectangular pads and the two lower rectangular pads enclose the through space to form the accommodating space; wherein, the inner sidewall of each chamber cover is opened There is an upper platen pad slot and a lower platen pad slot. Each upper platen rectangular pad is adapted to each upper platen pad slot. The outer side of each upper platen rectangular pad is located in the adapted upper platen pad slot and abuts against the bin cover. Each lower platen rectangular pad is adapted to each lower platen pad slot. The outer side of each lower platen rectangular pad is located in the adapted lower platen pad slot and abuts against the bin cover. A force transmission column slot is opened in the middle of the outer side wall of each lower platen rectangular pad. One end of the constant confining pressure shear force transmission column is located in one force transmission column slot and abuts against one lower platen rectangular pad. One end of the constant confining pressure shear force transmission column is located in another force transmission column slot and abuts against another lower platen rectangular pad.

[0010] In the first aspect, an upper plate sample and a lower plate sample are placed in the accommodating space. The upper plate sample is located above the lower plate sample. One end of the upper plate sample abuts against the inner wall of one of the upper plate rectangular pads, and the other end of the upper plate sample abuts against the inner wall of another upper plate rectangular pad. One end of the lower plate sample abuts against the inner wall of one of the lower plate rectangular pads, and the other end of the lower plate sample abuts against the inner wall of another lower plate rectangular pad. The thickness of each upper plate rectangular pad is greater than the thickness of each lower plate rectangular pad. The inner wall of one upper plate rectangular pad and the inner wall of one lower plate rectangular pad are on the same straight line, and the outer wall of another upper plate rectangular pad and the outer wall of another lower plate rectangular pad are on the same straight line. A first copper sheet is arranged between one of the vertical arc-shaped pads and the upper plate sample, and a second copper sheet is arranged between the other vertical arc-shaped pad and the lower plate sample.

[0011] In the first aspect, the simulation chamber further includes: four third PTFE plates, the first of which is located between an upper rectangular pad and the upper plate sample; the second of which is located between another upper rectangular pad and the upper plate sample; the third of which is located between a lower rectangular pad and the lower plate sample; and the fourth of which is located between another lower rectangular pad and the lower plate sample; and two upper lateral rectangular pads, one of which is located between the upper plate sample and a lateral arc-shaped pad. Between the upper lateral rectangular pad and the upper plate sample, a third copper sheet is arranged; another upper lateral rectangular pad is located between the upper plate sample and another lateral arc-shaped pad, and a fourth copper sheet is arranged between the other upper lateral rectangular pad and the upper plate sample; two lower lateral rectangular pads, one lower lateral rectangular pad is located between the lower plate sample and one lateral arc-shaped pad, and a fifth copper sheet is arranged between the other lower lateral rectangular pad and the lower plate sample; another lower lateral rectangular pad is located between the lower plate sample and another lateral arc-shaped pad, and a fifth copper sheet is arranged between the other lower lateral rectangular pad and the lower plate sample; A sixth copper sheet is arranged between the block and the lower plate sample; two lateral rectangular pads, one of which is located between an upper lateral rectangular pad and a lower lateral rectangular pad, and the other is located between another upper lateral rectangular pad and another lower lateral rectangular pad; two rubber strips, one of which is arranged between an upper lateral rectangular pad and a lower lateral rectangular pad, and the other is located adjacent to the side of the lateral rectangular pad away from the lateral curved pad; the other is arranged between the other upper lateral rectangular pad and the other... Between the lower lateral rectangular pads, another rubber strip is adjacent to the other lateral rectangular pad on the side away from the other lateral arc-shaped pad; four rubber pad layers, the first rubber pad layer is located between the first third PTFE plate and one upper rectangular pad, the second rubber pad layer is located between the second third PTFE plate and another upper rectangular pad, the third rubber pad layer is located between the third third PTFE plate and one lower rectangular pad, and the fourth rubber pad layer is located between the fourth third PTFE plate and another lower rectangular pad.

[0012] In the first aspect, an injection hole is provided on the upper part of one of the bin covers; a first channel and a second channel are provided on one of the upper rectangular pads; the first channel penetrates the upper rectangular pad and the injection hole communicates with one end of the first channel; one end of the second channel communicates with the middle of the first channel; an inflow cavity is provided between one of the upper rectangular pads and one of the lower rectangular pads, and the other end of the second channel communicates with the inflow cavity; a pad perforation is provided on the first rubber pad layer; a plate perforation is provided on the first third polytetrafluoroethylene plate; the first channel communicates with the pad perforation, and the pad perforation communicates with the plate perforation; a third channel and a fourth channel are provided on the upper plate sample; the third channel and the fourth channel are perpendicular to each other; one end of the third channel communicates with the pad perforation, and the other end of the third channel communicates with one end of the fourth channel; an outflow cavity is provided between another upper rectangular pad and another lower rectangular pad, and the other end of the fourth channel communicates with the outflow cavity.

[0013] In the first aspect, the simulation chamber further includes a first pipe, a second pipe, and an outlet pipe. One end of the first pipe passes sequentially through the injection hole, the first channel, the pad perforation, the plate perforation, the third channel, and the fourth channel into the outlet cavity, forming a first path. One end of the second pipe passes sequentially through the injection hole, the first channel, and the second channel into the inlet cavity, forming a second path. One end of the inlet cavity is connected to one end of the outlet cavity through the gap between the upper plate sample and the lower plate sample. An outlet is provided in the middle of the other chamber cover, and the outlet is connected to the other end of the outlet cavity. One end of the outlet pipe passes sequentially through the outlet and the seepage outlet of the confining pressure chamber, connecting to the outside of the confining pressure chamber.

[0014] In the first aspect, the simulation chamber further includes: two transverse water-sealing strips, one of which is disposed at the other end of the second channel and the other is sealed to the periphery of the first pipe; the other transverse water-sealing strip is sealed to the other end of the inlet cavity; two force transmission column sealing strips, one of which is located in a through hole of a force transmission column and the other is wrapped around the periphery of the constant confining pressure shear force transmission column; the other of which is located in a through hole of another force transmission column and the other is wrapped around the periphery of the constant confining pressure shear force transmission column.

[0015] In the first aspect, the simulation chamber further includes: a plurality of vibration sensors, the plurality of vibration sensors being uniformly arranged on both sides of the upper plate sample; a plurality of acoustic emission sensors, the plurality of acoustic emission sensors being uniformly arranged on both sides of the upper plate sample; a plurality of matrix strain gauges, the plurality of matrix strain gauges being uniformly arranged on both sides of the upper plate sample; and a plurality of eddy current sensors, the upper supports of the plurality of eddy current sensors being arranged on both sides of the upper plate sample, and the lower supports of the plurality of eddy current sensors being arranged on both sides of the lower plate sample, wherein the lower support of each eddy current sensor corresponds to the position of the upper support of a corresponding eddy current sensor; wherein both sides of the upper plate sample and both sides of the lower plate sample are coated with an epoxy resin adhesive layer, and the plurality of vibration sensors, acoustic emission sensors, matrix strain gauges, upper supports of the plurality of eddy current sensors, and lower supports of the plurality of eddy current sensors are all located inside the epoxy resin adhesive layer.

[0016] Beneficial effects:

[0017] An indoor tomographic activation simulation test device of the present invention includes a sample chamber, four outer arc-shaped pads, a vertical force transmission column, two lateral force transmission columns, two chamber covers, a constant confining pressure shear force transmission column, and a constant confining pressure adaptive force transmission column. The sample chamber is formed by two vertical arc-shaped pads, two lateral arc-shaped pads, two upper rectangular pads, and two lower rectangular pads, forming a closed accommodating space inside the sample chamber. The accommodating space inside the sample chamber is used to place the sample. The sample is subjected to a static confining pressure loading force in the confining pressure chamber. The sample includes an upper plate sample and a lower plate sample. The upper plate sample is located above the lower plate sample, and the two ends of the lower plate sample abut against the two lower rectangular pads respectively. The constant confining pressure shear force transmission column is used to load the lower rectangular pads. The pad blocks apply a load, giving the lower plate specimen a shear force. A constant confining pressure force transmission column applies a load to another lower rectangular pad block, giving the lower plate specimen a compensating force, ensuring the magnitude of the shear force on the upper plate specimen is within a controllable range. Two lateral force transmission columns apply lateral loading forces. The sides of the upper and lower plate specimens respectively abut against two lateral arc-shaped pad blocks. The positions of the two lateral arc-shaped pad blocks correspond to the positions of the two lateral arc-shaped pad blocks, allowing the forces applied by the two lateral force transmission columns to the two lateral arc-shaped pad blocks to be transmitted to the upper and lower plate specimens through the lateral arc-shaped pad blocks. A vertical force transmission column applies a normal loading force. The upper end face of the upper plate specimen abuts against a vertical arc-shaped pad block located above it. The positions of the external arc-shaped pad and the vertical arc-shaped pad correspond to each other, so that the force applied by the vertical force transmission column is transmitted to the vertical arc-shaped pad through the first external arc-shaped pad, and thus to the upper plate sample; at the same time, by arranging pipes in the two chamber covers, one upper plate rectangular pad, and the upper plate sample, the upper plate sample is subjected to high osmotic pressure conditions by injecting seepage into the injection port; in summary, the indoor fault activation simulation test device of the present invention can simulate the high stress environment of deep faults and simulate the dynamic-static coupling effect in engineering activities; the upper plate sample is provided with upper supports for acoustic emission sensors, vibration sensors, matrix strain gauges, and eddy current sensors on its side surface, and the lower plate sample is provided with upper supports for acoustic emission sensors, vibration sensors, matrix strain gauges, and eddy current sensors on its side surface. The lower support, with eddy current sensors deployed on its surface, monitors the acoustic, vibration, strain, and displacement changes of the upper plate sample when the sample in the sample chamber is simultaneously subjected to static confining pressure, shear force, lateral loading force, normal loading force, and high permeability pressure. This provides crucial data for understanding the mechanisms of earthquake nucleation and rupture propagation. In summary, this invention provides an indoor fault activation simulation test device that can simulate the high-stress environment of deep faults and the dynamic-static coupling effect in engineering activities. It can be used to study the impact of engineering activities such as hydraulic fracturing injection on fault stability in shale gas extraction and how engineering disturbances induce deep fault activation mechanisms, while providing crucial data for understanding the mechanisms of earthquake nucleation and rupture propagation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the simulation chamber of an indoor fault activation simulation test device according to the present invention;

[0020] Figure 2 yes Figure 1 AA cross-section view;

[0021] Figure 3 yes Figure 1 BB cross-section;

[0022] Figure 4 This is a schematic diagram of the internal structure of the simulation chamber of an indoor fault activation simulation test device according to the present invention;

[0023] Figure 5 This is a schematic diagram of the shear force test of the sample according to the present invention.

[0024] Figure label:

[0025] 1. Confining pressure chamber;

[0026] 2. Simulation chamber; 201. Sample chamber; 2011. Vertical arc-shaped pad; 2012. Lateral arc-shaped pad; 2013. Upper rectangular pad; 2014. Lower rectangular pad; 202. External arc-shaped pad; 203. Vertical force transmission column; 204. Lateral force transmission column; 205. Chamber cover; 206. Constant confining pressure shear force transmission column; 207. Constant confining pressure adaptive force transmission column; 208. Extra-large heat shrink sleeve; 209. Force transmission column fixing frame; 210. Tangential loading rod; 211. Adaptive 212. Loading rod; 213. First PTFE plate; 214. Second PTFE plate; 215. First copper sheet; 216. Second copper sheet; 217. Upper lateral rectangular pad; 218. Lower lateral rectangular pad; 219. Lateral rectangular pad strip; 220. Rubber strip; 221. Rubber pad layer; 222. Transverse water sealing strip; 223. Force transmission column sealing strip; 224. Vibration sensor; 225. Acoustic emission sensor; 226. Matrix strain gauge; 227. Eddy current sensor;

[0027] 3. Sample on plate;

[0028] 4. Sample test on the lower plate;

[0029] 101. Injection hole; 102. First channel; 103. Second channel; 104. Inlet cavity; 105. Third channel; 106. Fourth channel; 107. Outlet cavity. Detailed Implementation

[0030] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in this specification are within the scope of protection of this invention.

[0031] Example 1

[0032] like Figures 1-5 As shown, this embodiment provides an indoor fault activation simulation test device. The indoor fault activation simulation test device includes a confining pressure chamber 1 and a simulation chamber 2 disposed inside the confining pressure chamber 1. The simulation chamber 2 includes: a sample chamber 201, which has a cylindrical structure and a accommodating space in the middle; four external arc-shaped pads 202, each of which has an arc-shaped plate structure, one arc surface of each external arc-shaped pad 202 is adapted to the cylindrical outer wall of the sample chamber 201, and the other arc surface of each external arc-shaped pad 202 has a fixing groove; the four external arc-shaped pads 202 are evenly spaced on the cylindrical outer wall of the sample chamber 201; and a vertical force transmission column 203, one end of which is connected to the first external arc-shaped pad. The fixing grooves of block 202 abut against each other; two lateral force transmission columns 204, one end of which abuts against the fixing groove of the second outer arc-shaped pad block 202, and one end of which abuts against the fixing groove of the third outer arc-shaped pad block 202; the two lateral force transmission columns 204 are symmetrically arranged; two chamber covers 205, each chamber cover 205 having a force transmission column through hole, the two chamber covers 205 being fixedly connected to both ends of the sample chamber 201 respectively; a constant confining pressure shear force transmission column 206, one end of which passes through one of the force transmission column through holes and abuts against the lower part of one end of the sample chamber 201; a constant confining pressure offset force transmission column 207, one end of which passes through another of the force transmission column through holes and abuts against the lower part of the other end of the sample chamber 201.

[0033] An indoor tomographic activation simulation test device of the present invention includes a sample chamber, four outer arc-shaped pads, a vertical force transmission column, two lateral force transmission columns, two chamber covers, a constant confining pressure shear force transmission column, and a constant confining pressure adaptive force transmission column. The sample chamber is formed by two vertical arc-shaped pads, two lateral arc-shaped pads, two upper rectangular pads, and two lower rectangular pads, forming a closed accommodating space inside the sample chamber. The accommodating space inside the sample chamber is used to place the sample. The sample is subjected to a static confining pressure loading force in the confining pressure chamber. The sample includes an upper plate sample and a lower plate sample. The upper plate sample is located above the lower plate sample, and the two ends of the lower plate sample abut against the two lower rectangular pads respectively. The constant confining pressure shear force transmission column is used to load the lower rectangular pads. The pad blocks apply a load, giving the lower plate specimen a shear force. A constant confining pressure force transmission column applies a load to another lower rectangular pad block, giving the lower plate specimen a compensating force, ensuring the magnitude of the shear force on the upper plate specimen is within a controllable range. Two lateral force transmission columns apply lateral loading forces. The sides of the upper and lower plate specimens respectively abut against two lateral arc-shaped pad blocks. The positions of the two lateral arc-shaped pad blocks correspond to the positions of the two lateral arc-shaped pad blocks, allowing the forces applied by the two lateral force transmission columns to the two lateral arc-shaped pad blocks to be transmitted to the upper and lower plate specimens through the lateral arc-shaped pad blocks. A vertical force transmission column applies a normal loading force. The upper end face of the upper plate specimen abuts against a vertical arc-shaped pad block located above it. The positions of the external arc-shaped pad and the vertical arc-shaped pad correspond to each other, so that the force applied by the vertical force transmission column is transmitted to the vertical arc-shaped pad through the first external arc-shaped pad, and thus to the upper plate sample; at the same time, by arranging pipes in the two chamber covers, one upper plate rectangular pad, and the upper plate sample, the upper plate sample is subjected to high osmotic pressure conditions by injecting seepage into the injection port; in summary, the indoor fault activation simulation test device of the present invention can simulate the high stress environment of deep faults and simulate the dynamic-static coupling effect in engineering activities; the upper plate sample is provided with upper supports for acoustic emission sensors, vibration sensors, matrix strain gauges, and eddy current sensors on its side surface, and the lower plate sample is provided with upper supports for acoustic emission sensors, vibration sensors, matrix strain gauges, and eddy current sensors on its side surface. The lower support, with eddy current sensors deployed on its surface, monitors the acoustic, vibration, strain, and displacement changes of the upper plate sample when the sample in the sample chamber is simultaneously subjected to static confining pressure, shear force, lateral loading force, normal loading force, and high permeability pressure. This provides crucial data for understanding the mechanisms of earthquake nucleation and rupture propagation. In summary, this invention provides an indoor fault activation simulation test device that can simulate the high-stress environment of deep faults and the dynamic-static coupling effect in engineering activities. It can be used to study the impact of engineering activities such as hydraulic fracturing injection on fault stability in shale gas extraction and how engineering disturbances induce deep fault activation mechanisms, while providing crucial data for understanding the mechanisms of earthquake nucleation and rupture propagation.

[0034] In some possible implementations, the simulation chamber 2 further includes: an oversized heat shrink sleeve 208, which has a cylindrical structure and is fitted around the sample chamber 201; two force transmission column fixing brackets 209, each of which has a cylindrical structure and is symmetrically arranged, with one force transmission column fixing bracket 209 fixed to the lower part of one chamber cover 205 and the other force transmission column fixing bracket 209 fixed to the lower part of another chamber cover 205; each force transmission column fixing bracket 209... 9 has a sliding space, the other end of the constant confining pressure shear force transmission column 206 is located in one of the sliding spaces and is slidably connected to one of the force transmission column fixing frames 209, the other end of the constant confining pressure adaptive force transmission column 207 is located in another sliding space and is slidably connected to another force transmission column fixing frame 209; tangential loading rod 210, one end of the tangential loading rod 210 is fixedly connected to the other end of the constant confining pressure shear force transmission column 206; adaptive loading rod 211, one end of the adaptive loading rod 211 is fixedly connected to the other end of the constant confining pressure adaptive force transmission column 207.

[0035] Specifically, an extra-large heat-shrink sleeve is installed around the sample chamber to seal the gaps created by the enclosing of two vertical arc-shaped pads, two lateral arc-shaped pads, two upper rectangular pads, and two lower rectangular pads. This prevents hydraulic oil in the confining pressure chamber from entering the accommodating space through the gaps in the cylindrical outer wall of the sample chamber, and also prevents seepage from the accommodating space into the hydraulic chamber under high osmotic pressure conditions. The force transmission column fixing frame is used to fix the positions of the constant confining pressure shear force transmission column and the constant confining pressure adaptive force transmission column. At the same time, the sliding space in the force transmission column fixing frame is used for the constant confining pressure shear force transmission column and the constant confining pressure adaptive force transmission column to slide within when the tangential loading rod and the adaptive loading rod apply the loading force. The tangential loading rod is used to apply shear force, and the adaptive loading rod is used to apply compensation force, which has a compensating function and is used to control the magnitude of the shear force to be within a controllable range.

[0036] In some possible implementations, the sample chamber 201 includes: two vertical arc-shaped pads 2011, symmetrically spaced apart, with one arc surface of the first outer arc-shaped pad 202 fitting to the outer wall of one vertical arc-shaped pad 2011, and one arc surface of the second outer arc-shaped pad 202 fitting to the outer wall of the other vertical arc-shaped pad 2011; and two lateral arc-shaped pads 2012, located between the two vertical arc-shaped pads 2011, symmetrically spaced apart. One arc surface of each of the three lateral arc-shaped pads 202 is adapted to the outer side wall of one of the lateral arc-shaped pads 2012, and one arc surface of the fourth lateral arc-shaped pad 202 is adapted to the outer side wall of another lateral arc-shaped pad 2012; wherein, the circle containing the outer side wall of each vertical arc-shaped pad 2011 has the same diameter as the circle containing the outer side wall of each lateral arc-shaped pad 2012; two vertical arc-shaped pads 2011 and two lateral arc-shaped pads 2012 enclose a through space, which has a cubic structure; the two compartment covers 205 are respectively located at... At both ends of the passage space, the inner wall of one of the compartment covers 205 is fixedly connected to one end of each of the two vertical arc-shaped pads 2011 and one end of each of the two lateral arc-shaped pads 2012, respectively; the inner wall of the other compartment cover 205 is fixedly connected to the other ends of each of the two vertical arc-shaped pads 2011 and the other ends of each of the two lateral arc-shaped pads 2012, respectively; the simulated compartment 2 also includes two first polytetrafluoroethylene (PTFE) plates 212 and four second PTFE plates 213, the two first PTFE plates 212 being adapted to the two compartment covers respectively, and each first PTFE plate 212 contains... Through holes adapted to the through space are provided; one first polytetrafluoroethylene plate 212 is located inside one of the compartment covers 205 and abuts against two of the vertical arc-shaped pads 2011 and two of the lateral arc-shaped pads 2012 respectively; another first polytetrafluoroethylene plate 212 is located inside another compartment cover 205 and abuts against two of the vertical arc-shaped pads 2011 and two of the lateral arc-shaped pads 2012 respectively; each second polytetrafluoroethylene plate 213 is arranged between any one of the lateral arc-shaped pads 2012 and a corresponding one of the vertical arc-shaped pads 2011.

[0037] Specifically, the outer walls of the two vertical and two lateral arc-shaped pads have the same diameter, forming a circular through-space with circular outer walls. The interior of this through-space has a cubic structure, used to hold the upper and lower plate samples. The upper and lower plate samples are filled into the through-space to simulate soil and rock faults. The cover is located at both ends of the through-space and is fixedly connected to the vertical and lateral arc-shaped pads, respectively, serving as an outer layer to seal the through-space. The first polytetrafluoroethylene (PTFE) plate reduces the friction between the vertical and lateral arc-shaped pads, and the second PTFE plate reduces the friction between the cover and the vertical arc-shaped pads, reducing frictional losses during load transfer. This reduces the impact of the sample chamber on the stress on the upper and lower plate samples, improving the accuracy of the test.

[0038] In some possible implementations, the sample chamber 201 further includes: two upper rectangular pads 2013, each of which has a cubic structure and is located within the through space, with the two upper rectangular pads 2013 symmetrically arranged at both ends of the through space; two lower rectangular pads 2014, each of which has a cubic structure and is located within the through space, with the two lower rectangular pads 2014 symmetrically arranged at both ends of the through space; each lower rectangular pad 2014 is located below each of the upper rectangular pads 2013, so that the two upper rectangular pads 2013 and the two lower rectangular pads 2014 enclose the through space to form the accommodating space; wherein, each chamber cover The inner wall of 205 has an upper plate pad slot and a lower plate pad slot. Each upper plate rectangular pad 2013 is adapted to each upper plate pad slot. The outer side of each upper plate rectangular pad 2013 is located in the adapted upper plate pad slot and abuts against the bin cover 205. Each lower plate rectangular pad 2014 is adapted to each lower plate pad slot. The outer side of each lower plate rectangular pad 2014 is located in the adapted lower plate pad slot and abuts against the bin cover 205. A force transmission column slot is opened in the middle of the outer wall of each lower plate rectangular pad 2014. One end of the constant confining pressure shear force transmission column 206 is located in one force transmission column slot and abuts against one lower plate rectangular pad 2014. One end of the constant confining pressure shear force transmission column 207 is located in another force transmission column slot and abuts against another lower plate rectangular pad 2014.

[0039] Specifically, two vertical arc-shaped pads, two lateral arc-shaped pads, two upper rectangular pads, and two lower rectangular pads together form a accommodating space for the upper sample. The lower sample is located within this accommodating space. The two upper rectangular pads and two lower rectangular pads are located inside the two chamber covers, with each upper and lower rectangular pad abutting against the chamber cover. This creates a hollow cylindrical structure with the two chamber covers and the accommodating space, resulting in a more uniform static confining pressure load on the sample chamber. The force transmission column grooves are used to stabilize the application positions of the constant confining pressure shear force transmission column and the constant confining pressure adaptive force transmission column, preventing deviation during the loading process. The constant confining pressure shear force transmission column applies a load to one lower rectangular pad, providing a shear force to the lower sample. The constant confining pressure adaptive force transmission column applies a load to the other lower rectangular pad, providing a compensating force to the lower sample, ensuring that the magnitude of the shear force on the upper sample remains within a controllable range.

[0040] In some possible implementations, the accommodating space contains an upper plate sample 3 and a lower plate sample 4. The upper plate sample 3 is positioned above the lower plate sample 4. One end of the upper plate sample 3 abuts against the inner wall of one of the upper plate rectangular pads 2013, and the other end of the upper plate sample 3 abuts against the inner wall of another upper plate rectangular pad 2013. One end of the lower plate sample 4 abuts against the inner wall of one lower plate rectangular pad 2014, and the other end of the lower plate sample 4 abuts against the inner wall of another lower plate rectangular pad 2014. Each of the upper plate rectangular pads... The thickness of 2013 is greater than the thickness of each of the lower rectangular pads 2014. The inner wall of one upper rectangular pad 2013 is on the same straight line as the inner wall of one lower rectangular pad 2014, and the outer wall of another upper rectangular pad 2013 is on the same straight line as the outer wall of another lower rectangular pad 2014. A first copper sheet 214 is arranged between one vertical arc-shaped pad 2011 and the upper sample 3, and a second copper sheet 215 is arranged between another vertical arc-shaped pad 2011 and the lower sample 4.

[0041] Specifically, the length of the upper plate sample is shorter than that of the lower plate sample. The end of the lower plate sample subjected to the compensating force is located on the same plane as the end of the upper plate sample. This allows the lower plate sample to move along the direction of the applied shear force during the simulation of a soil fault, causing friction between it and the frictional sliding surface of the upper plate sample. This also facilitates monitoring by an eddy current displacement sensor. The first copper sheet and the second copper sheet are used to reduce the friction between the vertical arc-shaped pad and the upper plate sample, and between the vertical arc-shaped pad and the lower plate sample, respectively.

[0042] In some possible implementations, the simulation chamber 2 further includes: four third PTFE plates, the first of which is located between one of the upper rectangular pads 2013 and the upper sample 3; the second of which is located between another upper rectangular pad 2013 and the upper sample 3; the third of which is located between one lower rectangular pad 2014 and the lower sample 4; and the fourth of which is located between another lower rectangular pad 2014 and the lower sample 4; and two upper lateral rectangular pads. 216, one of the upper lateral rectangular pads 216 is located between the upper plate sample 3 and one of the lateral arc-shaped pads 2012, and a third copper sheet is arranged between the upper lateral rectangular pad 216 and the upper plate sample 3; another upper lateral rectangular pad 216 is located between the upper plate sample 3 and another lateral arc-shaped pad 2012, and a fourth copper sheet is arranged between the other upper lateral rectangular pad 216 and the upper plate sample 3; two lower lateral rectangular pads 217, one of the lower lateral rectangular pads 217 is located between the lower plate sample 4 and one of the lateral arc-shaped pads 2012. Between the lower lateral rectangular pad 217 and the lower plate sample 4, a fifth copper sheet is arranged; another lower lateral rectangular pad 217 is located between the lower plate sample 4 and another lateral arc-shaped pad 2012, and a sixth copper sheet is arranged between the other lower lateral rectangular pad 217 and the lower plate sample 4; two lateral rectangular pads 218, one lateral rectangular pad 218 is located between an upper lateral rectangular pad 216 and a lower lateral rectangular pad 217, and the other lateral rectangular pad 218 is located between another upper lateral rectangular pad 216 and another lower lateral rectangular pad 2012. Between one of the lower lateral rectangular pads 217; two rubber strips 219, one rubber strip 219 is disposed between one of the upper lateral rectangular pads 216 and one of the lower lateral rectangular pads 217, one rubber strip 219 is adjacent to the side of one of the lateral rectangular pads 218 away from one of the lateral arc-shaped pads; the other rubber strip 219 is disposed between another upper lateral rectangular pad 216 and another lower lateral rectangular pad 217, the other rubber strip 219 is adjacent to the side of another lateral rectangular pad 218 away from another lateral arc-shaped pad;Four rubber pads 220 are provided. The first rubber pad 220 is located between the first third PTFE plate and one upper rectangular pad 2013. The second rubber pad 220 is located between the second third PTFE plate and another upper rectangular pad 2013. The third rubber pad 220 is located between the third third PTFE plate and one lower rectangular pad 2014. The fourth rubber pad 220 is located between the fourth third PTFE plate and another lower rectangular pad 2014.

[0043] Specifically, the first and second PTFE plates are used to reduce friction between the upper rectangular pad and the upper plate sample, while the third and fourth PTFE plates are used to reduce friction between the lower rectangular pad and the lower plate sample. This reduces frictional losses during load transfer, thereby minimizing the impact of the sample chamber on the forces acting on the upper and lower plate samples and improving test accuracy. The two upper and two lower rectangular pads have corresponding holes to accommodate vibration and acoustic emission sensors. The third and fourth copper plates reduce friction between the two upper rectangular pads and the upper plate sample, while the fifth and sixth copper plates reduce friction between the two lower rectangular pads. Friction between the pad and the lower plate sample; two rubber strips are used to seal the fracture gap between the upper and lower plate samples; rubber pads are used to seal the gap between the upper plate sample and the upper rectangular pad, and the gap between the lower plate sample and the lower rectangular pad, to prevent the injected permeate from flowing into the gap between the upper plate sample and the upper rectangular pad, and between the lower plate sample and the lower rectangular pad, thus avoiding the impact on high osmotic pressure; transverse water-sealing strips are used to prevent permeate in the containment space from seeping out through the first channel and from seeping out through the inlet cavity; under the action of the two rubber strips, four rubber pads, and transverse water-sealing strips, the interior of the containment space is sealed, preventing the permeate in the containment space from seeping out under high osmotic pressure conditions.

[0044] In some possible implementations, an injection hole 101 is provided on the upper part of one of the bin covers 205, and a first channel 102 and a second channel 103 are provided on one of the upper rectangular pad blocks 2013. The first channel 102 penetrates the upper rectangular pad block 2013, and the injection hole 101 communicates with one end of the first channel 102; one end of the second channel 103 communicates with the middle end of the first channel 102, and an inflow cavity 104 is provided between one of the upper rectangular pad blocks 2013 and one of the lower rectangular pad blocks 2014. The other end of the second channel 103 is connected to the inlet cavity 104; a pad perforation is formed on the first rubber pad layer 220, and a plate perforation is formed on the first third polytetrafluoroethylene plate; the first channel 102 is connected to the pad perforation, and the pad perforation is connected to the plate perforation; a third channel 105 and a fourth channel 106 are formed on the upper plate sample 3; the third channel 105 and the fourth channel 106 are perpendicular to each other; one end of the third channel 105 is connected to the pad perforation, and the other end of the third channel 105 is connected to the first inlet cavity 104; One end of the four-channel 106 is connected, and an outlet cavity 107 is provided between another upper rectangular pad 2013 and another lower rectangular pad 2014. The other end of the fourth channel 106 is connected to the outlet cavity 107. The simulation chamber 2 also includes a first pipe, a second pipe, and an outlet pipe. One end of the first pipe passes through the injection hole 101, the first channel 102, the pad perforation, the plate perforation, the third channel 105, and the fourth channel 106 in sequence to enter the outlet cavity 107, forming a first path. One end of the two pipes passes sequentially through the injection hole 101, the first channel 102, and the second channel 103 into the inlet cavity 104 to form a second path; one end of the inlet cavity 104 is connected to one end of the outlet cavity 107 through the gap between the upper plate sample 3 and the lower plate sample 4; another compartment cover 205 has an outlet in the middle, which is connected to the other end of the outlet cavity 207; one end of the water outlet pipe passes sequentially through the outlet and the seepage outlet of the confining pressure chamber 1 to connect to the outside of the confining pressure chamber 1.

[0045] Specifically, after the permeate is injected into the injection port, there are two permeation paths. The first permeation path is that the permeate enters the gap between the upper and lower plate samples via the first path. This gap is the fault plane. The permeate seeps and diffuses from the middle to both ends of the fault plane, diffusing into the inlet cavity and the outlet cavity respectively. The horizontal plane of the outlet cavity is lower than that of the inlet cavity. The permeate in the outlet cavity flows out of the containment space and the confining pressure chamber through the outlet pipe. The permeate in the inlet cavity seeps along the fault plane to the outlet cavity under a certain pressure, and then flows out of the containment space and the confining pressure chamber through the outlet pipe. The second permeation path is that the permeate enters the inlet cavity via the second path. Under a certain pressure, the permeate seeps from the inlet cavity along the fault plane to the bottom and enters the outlet cavity, and then flows out of the containment space and the confining pressure chamber through the outlet pipe. The indoor fault activation simulation test device of the present invention can simulate the influence of different infiltration sites and permeation diffusion modes on the fault sliding stability through two permeation paths.

[0046] In some possible implementations, the simulation chamber 2 further includes: two transverse water-sealing strips 221, one of which is disposed at the other end of the second channel 103 and the other is sealed to the periphery of the first pipe; the other is sealed to the other end of the inlet cavity 104; two force transmission column sealing strips 222, one of which is located in a through hole of a force transmission column and the other is wrapped around the periphery of the constant confining pressure shear force transmission column 206; the other is located in a through hole of another force transmission column and the other is wrapped around the periphery of the constant confining pressure shear force transmission column 207.

[0047] Specifically, the two transverse water-sealing strips are used to prevent the seepage in the containment space from leaking out through the first channel and to prevent the seepage in the containment space from leaking out through the inlet cavity; the two force transmission column sealing strips are used to prevent the hydraulic oil in the confining pressure chamber from entering the sample chamber through the force transmission column perforation.

[0048] In some possible implementations, the simulation chamber 2 further includes: a plurality of vibration sensors 223, the plurality of vibration sensors 223 being evenly distributed on both sides of the upper platen sample 3; a plurality of acoustic emission sensors 224, the plurality of acoustic emission sensors 224 being evenly distributed on both sides of the upper platen sample 3; a plurality of matrix strain gauges 225, the plurality of matrix strain gauges 225 being evenly distributed on both sides of the upper platen sample 3; and a plurality of eddy current sensors 226, the upper supports of the plurality of eddy current sensors 226 being distributed on both sides of the upper platen sample 3. The lower supports of the sensors 226 are arranged on both sides of the lower platen sample 4, and the lower support of each eddy current sensor 226 corresponds to the position of the upper support of a matching eddy current sensor 226. The upper platen sample 3 and the lower platen sample 4 are coated with epoxy resin adhesive layers. The upper supports and lower supports of several vibration sensors 223, several acoustic emission sensors 224, several matrix strain gauges 225, several eddy current sensors 226 are all located inside the epoxy resin adhesive layer.

[0049] Specifically, the inner sides of the two upper lateral rectangular pads and the two lower lateral rectangular pads are provided with grooves corresponding to the vibration sensor and the acoustic emission sensor to accommodate them. The epoxy resin adhesive layer applied to both sides of the upper and lower plate samples has a certain thickness to protect the vibration sensor, acoustic emission sensor, matrix strain gauge, and eddy current sensor installed on the sample. In this invention, the vertical force transmission column is subjected to a normal loading force, which is transmitted to the vertical arc-shaped pad through the outer arc-shaped pad, and then to the upper plate sample via the copper sheet. The lateral force transmission column is subjected to a lateral loading force, which is transmitted to the lateral arc-shaped pad through the outer arc-shaped pad, then to the upper and lower lateral rectangular pads, and finally to the upper and lower plate samples via the epoxy resin adhesive layer. A shear force is applied by the tangential loading rod, which is transmitted to the lower rectangular pad through the constant confining pressure shear force transmission column, and then through the third rubber pad and the third polytetrafluoroethylene plate. The lower plate sample is subjected to a compensating force applied through a fault-fitting loading rod. This compensating force is transmitted to the lower plate rectangular pad through a constant confining pressure fault-fitting force transmission column, and then to the lower plate sample through a fourth rubber pad layer and a fourth polytetrafluoroethylene plate. In summary, the load transfer of the indoor fault activation simulation test device of this invention is accurate, ensuring that the externally applied load can be accurately transmitted to the sample. In addition, in this invention, the output lines of the vibration sensor, acoustic emission sensor, matrix strain gauge, and eddy current sensor are all connected to a high-pressure sealed joint, ensuring normal communication and data transmission of the sensor lines under high-pressure conditions. By constructing a monitoring system using the vibration sensor, acoustic emission sensor, matrix strain gauge, and eddy current sensor, the indoor fault activation simulation test device of this invention can collect detailed data on the initiation location, propagation direction, rate, and vibration characteristics of fault rupture, providing a scientific basis for the study of fault activation mechanisms, helping to overcome fundamental problems and technical bottlenecks, and providing support for resource and energy production capacity assurance.

[0050] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An indoor fault activation simulation test device, characterized by, The indoor fault activation simulation test device comprises a confining pressure chamber and a simulation bin arranged inside the confining pressure chamber, and the simulation bin comprises: a sample bin, which is in a cylindrical structure and has a containing space in the middle; four outer-arc-shaped pad blocks, each of which is in an arc plate structure, one arc surface of each of the outer-arc-shaped pad blocks is matched with the cylindrical outer lateral wall of the sample bin, and the other arc surface of each of the outer-arc-shaped pad blocks has a fixing groove; the four outer-arc-shaped pad blocks are uniformly and spacedly arranged on the cylindrical outer lateral wall of the sample bin; a vertical force transmission column, one end of which is matched with the fixing groove of the first outer-arc-shaped pad block; two lateral force transmission columns, one end of one of the lateral force transmission columns is matched with the fixing groove of the second outer-arc-shaped pad block, and one end of the other lateral force transmission column is matched with the fixing groove of the third outer-arc-shaped pad block; the two lateral force transmission columns are symmetrically arranged; two bin covers, each of which is provided with a force transmission column through hole, and the two bin covers are fixedly connected with the two ends of the sample bin, respectively; a constant confining pressure shear force transmission column, one end of which is matched with the lower part of one end of the sample bin through the force transmission column through hole; a constant confining pressure misfit force transmission column, one end of which is matched with the lower part of the other end of the sample bin through the other force transmission column through hole; the simulation bin further comprises: an ultra-large heat shrink sleeve, which is in a cylindrical structure and is sleeved on the periphery of the sample bin; two force transmission column fixing frames, each of which is in a cylindrical structure, the two force transmission column fixing frames are symmetrically arranged, one of the force transmission column fixing frames is fixedly connected with the lower part of one of the bin covers, and the other of the force transmission column fixing frames is fixedly connected with the lower part of the other of the bin covers; each of the force transmission column fixing frames has a sliding space, the other end of the constant confining pressure shear force transmission column is located in one of the sliding spaces and is slidably connected with one of the force transmission column fixing frames, and the other end of the constant confining pressure misfit force transmission column is located in the other of the sliding spaces and is slidably connected with the other of the force transmission column fixing frames; a tangential loading rod, one end of which is fixedly connected with the other end of the constant confining pressure shear force transmission column; a misfit loading rod, one end of which is fixedly connected with the other end of the constant confining pressure misfit force transmission column; the sample bin comprises: two vertical arc-shaped pad blocks, which are symmetrically and spacedly arranged, one arc surface of the first outer-arc-shaped pad block is matched with the outer lateral wall of one of the vertical arc-shaped pad blocks, and one arc surface of the second outer-arc-shaped pad block is matched with the outer lateral wall of the other of the vertical arc-shaped pad blocks; two lateral arc-shaped pad blocks, which are located in the middle of the two vertical arc-shaped pad blocks, the two lateral arc-shaped pad blocks are symmetrically and spacedly arranged, one arc surface of the third outer-arc-shaped pad block is matched with the outer lateral wall of one of the lateral arc-shaped pad blocks, and one arc surface of the fourth outer-arc-shaped pad block is matched with the outer lateral wall of the other of the lateral arc-shaped pad blocks. Two of the vertical arc-shaped pads and two of the lateral arc-shaped pads enclose a through space, which is in a cubic structure; two of the can covers are respectively located at two ends of the through space, and an inner side wall of one of the can covers is fixedly connected with one end of two of the vertical arc-shaped pads and one end of two of the lateral arc-shaped pads; an inner side wall of the other of the can covers is fixedly connected with the other end of two of the vertical arc-shaped pads and the other end of two of the lateral arc-shaped pads; the simulation can further comprises two first polytetrafluoroethylene plates and four second polytetrafluoroethylene plates, two of the first polytetrafluoroethylene plates are respectively matched with two of the can covers, and a through hole matched with the through space is formed in the middle of each of the first polytetrafluoroethylene plates; one of the first polytetrafluoroethylene plates is located on the inner side of one of the can covers and abuts against two of the vertical arc-shaped pads and two of the lateral arc-shaped pads; the other of the first polytetrafluoroethylene plates is located on the inner side of the other of the can covers and abuts against two of the vertical arc-shaped pads and two of the lateral arc-shaped pads; each of the second polytetrafluoroethylene plates is arranged between any one of the lateral arc-shaped pads and a corresponding one of the vertical arc-shaped pads; The sample can further comprises: Two upper disc rectangular pads, each of the upper disc rectangular pads is in a cubic structure, each of the upper disc rectangular pads is located in the through space, and two of the upper disc rectangular pads are symmetrically arranged at two ends of the through space; Two lower disc rectangular pads, each of the lower disc rectangular pads is in a cubic structure, each of the lower disc rectangular pads is located in the through space, and two of the lower disc rectangular pads are symmetrically arranged at two ends of the through space; each of the lower disc rectangular pads is located below each of the upper disc rectangular pads, so that two of the upper disc rectangular pads and two of the lower disc rectangular pads enclose the through space to form the containing space; An upper disc pad groove and a lower disc pad groove are formed in the inner side wall of each of the can covers, each of the upper disc rectangular pads is matched with each of the upper disc pad grooves, and the outer side of each of the upper disc rectangular pads is located in a matched one of the upper disc pad grooves and abuts against the can cover; each of the lower disc rectangular pads is matched with each of the lower disc pad grooves, and the outer side of each of the lower disc rectangular pads is located in a matched one of the lower disc pad grooves and abuts against the can cover; a force transmission column groove is formed in the middle of the outer side wall of each of the lower disc rectangular pads, one end of the constant-enclosure-pressure shear force transmission column is located in one of the force transmission column grooves and abuts against one of the lower disc rectangular pads, and one end of the constant-enclosure-pressure misalignment force transmission column is located in the other of the force transmission column grooves and abuts against the other of the lower disc rectangular pads. The accommodation space is provided with an upper disc sample and a lower disc sample, the upper disc sample is located above the lower disc sample, one end of the upper disc sample abuts against the inner side wall of one of the upper disc rectangular pads, and the other end of the upper disc sample abuts against the inner side wall of the other upper disc rectangular pad; one end of the lower disc sample abuts against the inner side wall of one of the lower disc rectangular pads, and the other end of the lower disc sample abuts against the inner side wall of the other lower disc rectangular pad; the thickness of each upper disc rectangular pad is greater than the thickness of each lower disc rectangular pad, the inner side wall of one upper disc rectangular pad is located on the same straight line as the inner side wall of one lower disc rectangular pad, and the outer side wall of the other upper disc rectangular pad is located on the same straight line as the outer side wall of the other lower disc rectangular pad; wherein a first copper sheet is arranged between one vertical arc-shaped pad and the upper disc sample, and a second copper sheet is arranged between the other vertical arc-shaped pad and the lower disc sample; The length of the upper disc sample is less than the length of the lower disc sample; The simulation bin further comprises: Four third polytetrafluoroethylene plates, a first third polytetrafluoroethylene plate is located between one of the upper disc rectangular pads and the upper disc sample, a second third polytetrafluoroethylene plate is located between the other upper disc rectangular pad and the upper disc sample, a third third polytetrafluoroethylene plate is located between one of the lower disc rectangular pads and the lower disc sample, and a fourth third polytetrafluoroethylene plate is located between the other lower disc rectangular pad and the lower disc sample; Two upper lateral rectangular pads, one upper lateral rectangular pad is located between the upper disc sample and one lateral arc-shaped pad, and a third copper sheet is arranged between the one upper lateral rectangular pad and the upper disc sample; the other upper lateral rectangular pad is located between the upper disc sample and the other lateral arc-shaped pad, and a fourth copper sheet is arranged between the other upper lateral rectangular pad and the upper disc sample; Two lower lateral rectangular pads, one lower lateral rectangular pad is located between the lower disc sample and one lateral arc-shaped pad, and a fifth copper sheet is arranged between the one lower lateral rectangular pad and the lower disc sample; the other lower lateral rectangular pad is located between the lower disc sample and the other lateral arc-shaped pad, and a sixth copper sheet is arranged between the other lower lateral rectangular pad and the lower disc sample; Two lateral rectangular pads, one lateral rectangular pad is located between one upper lateral rectangular pad and one lower lateral rectangular pad, and the other lateral rectangular pad is located between the other upper lateral rectangular pad and the other lower lateral rectangular pad; Two rubber strips, one of the rubber strips is arranged between one of the upper lateral rectangular pads and one of the lower lateral rectangular pads, one of the rubber strips is close to one side of one of the lateral rectangular pad away from one of the lateral arc pad; another of the rubber strips is arranged between another of the upper lateral rectangular pad and another of the lower lateral rectangular pad, another of the rubber strips is close to another side of another of the lateral rectangular pad away from another of the lateral arc pad; Four rubber pad layers, the first rubber pad layer is located between the first third polytetrafluoroethylene plate and one of the upper disc rectangular pads, the second rubber pad layer is located between the second third polytetrafluoroethylene plate and another of the upper disc rectangular pads, the third rubber pad layer is located between the third third polytetrafluoroethylene plate and one of the lower disc rectangular pads, and the fourth rubber pad layer is located between the fourth third polytetrafluoroethylene plate and another of the lower disc rectangular pads; The upper part of one of the cover caps is provided with an injection hole, one of the upper disc rectangular pads is provided with a first channel and a second channel, the first channel penetrates through the upper disc rectangular pad, and one end of the injection hole is in communication with one end of the first channel; one end of the second channel is in communication with the middle end of the first channel, one of the upper disc rectangular pads and one of the lower disc rectangular pads have an inflow cavity, and the other end of the second channel is in communication with the inflow cavity; the first rubber pad layer is provided with a pad through hole, the first third polytetrafluoroethylene plate is provided with a plate through hole, the first channel is in communication with the pad through hole, and the pad through hole is in communication with the plate through hole; the upper disc sample is provided with a third channel and a fourth channel, the third channel and the fourth channel are perpendicular to each other, one end of the third channel is in communication with the pad through hole, the other end of the third channel is in communication with one end of the fourth channel, another of the upper disc rectangular pads and another of the lower disc rectangular pads have an outflow cavity, and the other end of the fourth channel is in communication with the outflow cavity; The simulation bin further comprises a first pipeline, a second pipeline and a water outlet pipe, one end of the first pipeline sequentially penetrates through the injection hole, the first channel, the pad through hole, the plate through hole, the third channel and the fourth channel into the outflow cavity to form a first path; one end of the second pipeline sequentially penetrates through the injection hole, the first channel and the second channel into the inflow cavity to form a second path; one end of the inflow cavity is in communication with the other end of the outflow cavity through the gap between the upper disc sample and the lower disc sample; the middle part of the other cover cap is provided with an outflow port, the outflow port is in communication with the other end of the outflow cavity, and one end of the water outlet pipe sequentially penetrates through the outflow port, the seepage liquid outlet of the confining pressure chamber and the outside of the confining pressure chamber in communication; The simulation bin further comprises: Two lateral water sealing strips, one of the lateral water sealing strips is arranged at the other end of the second channel, and one of the lateral water sealing strips is in sealing connection with the periphery of the first pipeline; another of the lateral water sealing strips is in sealing connection with the other end of the inflow cavity; Two force column sealing strips, one of the force column sealing strips is located in one of the force column perforations, and one of the force column sealing strips is arranged on the periphery of the constant surrounding pressure shear force column; the other force column sealing strip is located in the other force column perforation, and the other force column sealing strip is arranged on the periphery of the constant surrounding pressure shear force column.

2. The apparatus for simulating fault activation in a room according to claim 1, wherein The simulation bin further comprises: A plurality of vibration sensors, a plurality of vibration sensors are uniformly arranged on both sides of the upper disc sample; A plurality of acoustic emission sensors, a plurality of acoustic emission sensors are uniformly arranged on both sides of the upper disc sample; A plurality of matrix strain gauges, a plurality of matrix strain gauges are uniformly arranged on both sides of the upper disc sample; A plurality of eddy current sensors, a plurality of upper supports of the eddy current sensors are arranged on both sides of the upper disc sample, and a plurality of lower supports of the eddy current sensors are arranged on both sides of the lower disc sample, and the position of each lower support of the eddy current sensor corresponds to the position of the upper support of the corresponding eddy current sensor; Wherein, both sides of the upper disc sample and both sides of the lower disc sample are coated with an epoxy resin glue layer, and a plurality of vibration sensors, a plurality of acoustic emission sensors, a plurality of matrix strain gauges, a plurality of upper supports of the eddy current sensors and a plurality of lower supports of the eddy current sensors are located inside the epoxy resin glue layer.

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