Indoor fault activation simulation test device

Abstract

The invention discloses an indoor fault activation simulation test device. The indoor fault activation simulation test device comprises a confining pressure chamber and a simulation bin arranged in the confining pressure chamber. Compared with the prior art, the indoor fault activation simulation test device disclosed by the invention can simulate complex engineering disturbance and deep real stress environment conditions, and simulate dynamic and static coupling effects in engineering activities; the method can be used for researching the influence of injection fracturing in engineering activities such as shale gas exploitation on fault stability and how engineering disturbance induces a deep fault activation mechanism, and meanwhile, provides key data for mechanisms such as seismic nucleation and fracture expansion processes.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical testing, and in particular to an indoor fault activation simulation testing device. Background Art

[0002] my country's shale gas production has shown a significant growth trend, and the proportion of unconventional natural gas in my country's natural gas production has continued to increase. However, shale gas extraction still faces some challenges, such as complex geological conditions and high extraction costs, and shale gas extraction also brings some problems, such as pollution of water resources and other environments. In the process of shale gas extraction, injection fracturing is one of the key steps. A fracture network is formed in the shale layer by injecting fluid at high pressure to increase the production of shale gas. However, this process may change 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 new energy such as shale gas, and for predicting and preventing seismic activities that may be induced during shale gas extraction. Indoor fault activation simulation 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 and provide scientific guidance for the safe and efficient development of shale gas. Deep faults are in a high-stress environment, the disturbance intensity of engineering activities is large, the dynamic-static coupling characteristics are significant, and the fluid injection pressure is high and changes frequently.

[0003] At present, domestic and foreign research teams mostly use conventional rock mechanics shear test equipment or conventional rock mechanics triaxial test equipment to carry out experimental research on related mechanisms. However, the existing test equipment cannot accurately simulate complex engineering disturbances and real stress environmental conditions at depth, which restricts the breakthrough of the mechanism of deep fault activation induced by engineering disturbances. It is urgent to develop a simulator for deep fault activation induced by complex engineering disturbances, break through basic problems and technical bottlenecks through experimental research, and provide support for resource and energy production capacity.

[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 breaking through the problem of the mechanism of deep fault activation induced by engineering disturbances, is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] In view of the problem that the prior art cannot accurately simulate complex engineering disturbances and real deep stress environmental conditions, which restricts the breakthrough of the mechanism problem 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 environmental conditions, thereby creating conditions for the breakthrough of the mechanism problem of deep fault activation induced by engineering disturbances.

[0006] To achieve the above-mentioned purpose, the present invention provides an indoor fault activation simulation test device, which includes a confining pressure chamber and a simulation chamber arranged inside the confining pressure chamber, wherein the simulation chamber includes: a sample chamber, which is a cylindrical structure with a accommodating space in the middle of the sample chamber; four arc-shaped pads outside the chamber, each of which is an arc-shaped plate-shaped structure, one arc surface of each arc-shaped pad is adapted to the cylindrical outer side wall of the sample chamber, and the other arc surface of each arc-shaped pad is provided with a fixing groove; the four arc-shaped pads outside the chamber are evenly spaced on the cylindrical outer side wall of the sample chamber; a vertical force transmission column, one end of which is connected to the first The fixed grooves of the arc-shaped pads outside the warehouse are abutted against each other; two lateral force transmission columns, one end of one lateral force transmission column is abutted against the fixed groove of the second arc-shaped pad outside the warehouse, and one end of the other lateral force transmission column is abutted against the fixed groove of the third arc-shaped pad outside the warehouse; the two lateral force transmission columns are symmetrically arranged; two warehouse covers, each of which is provided with a force transmission column through-hole, and the two warehouse covers are respectively fixedly connected to the two ends of the sample warehouse; a constant confining pressure shear force transmission column, one end of the constant confining pressure shear force transmission column passes through one of the force transmission column through-holes and abuts against the lower part of one end of the sample warehouse; a constant confining pressure adaptive offset force transmission column, one end of the constant confining pressure adaptive offset force transmission column passes through the other of the force transmission column through-holes and abuts against the lower part of the other end of the sample warehouse.

[0007] In the first aspect, the simulation chamber also includes: an oversized heat shrink sleeve, which is in a cylindrical structure and is arranged on the periphery of the sample chamber; two force transmission column fixing frames, each of which is in a cylindrical structure, and the two force transmission column fixing frames are symmetrically arranged, one of which is fixed to the lower part of one of the chamber covers, and the other of which is fixed to the lower part of the other of the chamber 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 to one of the force transmission column fixing frames, and the other end of the constant confining pressure adaptive offset force transmission column is located in another of the sliding spaces and is slidably connected to another of the force transmission column fixing frames; a tangential loading rod, one end of which is fixedly connected to the other end of the constant confining pressure shear force transmission column; an adaptive offset loading rod, one end of which is fixedly connected to the other end of the constant confining pressure adaptive offset force transmission column.

[0008] In the first aspect, the sample bin comprises: two vertical arc pads, the two vertical arc pads are symmetrically spaced, one arc surface of the first arc pad outside the bin is matched with the outer side wall of one vertical arc pad, and one arc surface of the second arc pad outside the bin is matched with the outer side wall of the other vertical arc pad; two lateral arc pads, the two lateral arc pads are located in the middle of the two vertical arc pads, the two lateral arc pads are symmetrically spaced, and the third lateral bin An arc surface of the outer arc pad is matched with the outer side wall of one of the lateral arc pads, and an arc surface of the fourth lateral warehouse outer arc pad is matched with the outer side wall of another lateral arc pad; wherein the circle where the outer side wall of each vertical arc pad is located is the same as the diameter of the circle where the outer side wall of each lateral arc pad is located; the two vertical arc pads and the two lateral arc pads are combined to form a through space, and the through space is a cubic structure; the two warehouse covers are respectively located in the through space At the two end ends of the through space, the inner side wall of one of the bin covers is fixedly connected to one end of the two vertical arc-shaped pads and one end of the two lateral arc-shaped pads, and the inner side wall of the other bin cover is fixedly connected to the other end of the two vertical arc-shaped pads and the other end of the two lateral arc-shaped pads; the simulation bin also includes two first polytetrafluoroethylene plates and four second polytetrafluoroethylene plates, the two first polytetrafluoroethylene plates are respectively adapted to the two bin covers, and each of the first polytetrafluoroethylene plates is provided with a through hole adapted to the through space in the middle; one of the first polytetrafluoroethylene plates is located on the inner side of one of the bin covers, and is respectively abutted against the two vertical arc-shaped pads and the two lateral arc-shaped pads; another of the first polytetrafluoroethylene plates is located on the inner side of the other bin cover, and is respectively abutted against the two vertical arc-shaped pads and the two 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.

[0009] In the first aspect, the sample bin further comprises: two upper rectangular pads, each of which is in a cubic structure, each of which is located in the through-space, and the two upper rectangular pads are symmetrically arranged at both ends of the through-space; two lower rectangular pads, each of which is in a cubic structure, each of which is located in the through-space, and the two lower rectangular pads are 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 side wall of each bin cover is opened There is an upper plate pad groove and a lower plate pad groove, each of the upper plate rectangular pads is matched with each of the upper plate pad grooves, and the outer side of each of the upper plate rectangular pads is located in a matched upper plate pad groove and abuts against the bin cover; each of the lower plate rectangular pads is matched with each of the lower plate pad grooves, and the outer side of each of the lower plate rectangular pads is located in a matched lower plate pad groove and abuts against the bin cover; a force transfer column groove is provided in the middle of the outer side wall of each of the lower plate rectangular pads, one end of the constant confining pressure shear force transfer column is located in one of the force transfer column grooves and abuts against one of the lower plate rectangular pads, and one end of the constant confining pressure misalignment force transfer column is located in another of the force transfer column grooves and abuts against another of the lower plate rectangular pads.

[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 is against the inner wall of one of the upper plate rectangular pads, and the other end of the upper plate sample is against the inner wall of another of the upper plate rectangular pads; one end of the lower plate sample is against the inner wall of one of the lower plate rectangular pads, and the other end of the lower plate sample is against the inner wall of another of the lower plate rectangular pads; the thickness of each of the upper plate rectangular pads is greater than the thickness of each of the lower plate rectangular pads, the inner wall of one of the upper plate rectangular pads and the inner wall of one of the lower plate rectangular pads are located on the same straight line, and the outer wall of another of the upper plate rectangular pads and the outer wall of another of the lower plate rectangular pads are located on the same straight line; wherein, a first copper sheet is arranged between one of the vertical arc pads and the upper plate sample, and a second copper sheet is arranged between another of the vertical arc pads and the lower plate sample.

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

[0012] In the first aspect, an injection hole is provided on the upper part of the bin cover, a first channel and a second channel are provided on the upper plate rectangular pad, the first channel passes through the upper plate rectangular pad, and the injection hole is connected to one end of the first channel; one end of the second channel is connected to the middle end of the first channel, an inlet cavity is provided between an upper plate rectangular pad and a lower plate rectangular pad, and the other end of the second channel is connected to the inlet cavity; a pad through hole is provided on the first rubber pad layer, a plate through hole is provided on the first third polytetrafluoroethylene plate, the first channel is connected to the pad through hole, and the pad through hole is connected to the plate through hole; 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 is connected to the pad through hole, and the other end of the third channel is connected to one end of the fourth channel, an outlet cavity is provided between another upper plate rectangular pad and another lower plate rectangular pad, and the other end of the fourth channel is connected to the outlet cavity.

[0013] In the first aspect, the simulation chamber also includes a first pipe, a second pipe and an outlet pipe, one end of the first pipe passes through the injection hole, the first channel, the pad perforation, the plate perforation, the third channel and the fourth channel in sequence to enter the outlet cavity to form a first path; one end of the second pipe passes through the injection hole, the first channel, the second channel in sequence to enter the inlet cavity to form a second path; one end of the inlet cavity is connected with one end of the outlet cavity through the gap between the upper plate sample and the lower plate sample; an outlet is opened in the middle of the other chamber cover, and the outlet is connected with the other end of the outlet cavity, and one end of the outlet pipe passes through the outlet and the seepage outlet of the confining pressure chamber in sequence to be connected to the outside of the confining pressure chamber.

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

[0015] In the first aspect, the simulation chamber also includes: a plurality of vibration sensors, which are evenly arranged on both sides of the upper plate sample; a plurality of acoustic emission sensors, which are evenly arranged on both sides of the upper plate sample; a plurality of matrix strain gauges, which are evenly arranged on both sides of the upper plate sample; a plurality of eddy current sensors, whose upper supports are arranged on both sides of the upper plate sample, and whose lower supports are arranged on both sides of the lower plate sample, and whose lower supports are arranged on both sides of the lower plate sample, and whose lower supports are arranged at the positions corresponding to the upper supports of the corresponding eddy current sensors; 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, the plurality of acoustic emission sensors, the plurality of matrix strain gauges, the upper supports of the plurality of eddy current sensors and the lower supports of the plurality of eddy current sensors are all located inside the epoxy resin adhesive layer.

[0016] Beneficial effects:

[0017] An indoor fault activation simulation test device of the present invention comprises a sample chamber, four arc-shaped pads outside the chamber, 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 offset force transmission column. The sample chamber is composed of two vertical arc-shaped pads, two lateral arc-shaped pads, two upper rectangular pads and two lower rectangular pads, and a closed accommodating space is formed inside the sample chamber. The accommodating space in 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 comprises an upper plate sample and a lower plate sample. The upper plate sample is located above the lower plate sample. The two ends of the lower plate sample are respectively against the two lower rectangular pads. The constant confining pressure shear force transmission column is used to press a lower rectangular plate against the upper plate sample. The pad applies a load, giving a shear force to the lower plate sample, and applies a load to another lower rectangular pad through the constant confining pressure adaptive force transfer column, giving a compensation force to the lower plate sample, so that the magnitude of the shear force on the upper plate sample is within a controllable range; the two lateral force transfer columns are used to apply lateral loading force, and the two sides of the upper plate sample and the lower plate sample are respectively against the two lateral arc pads, and the two lateral warehouse outer arc pads correspond to the positions of the two lateral arc pads, so that the force applied by the two lateral force transfer columns to the two lateral warehouse outer arc pads can be transmitted to the upper plate sample and the lower plate sample through the lateral arc pads; the vertical force transfer column is used to apply normal loading force, and the upper end surface of the upper plate sample is against a vertical arc pad located above The positions of the arc-shaped pads outside the warehouse correspond to the vertical arc-shaped pads, so that the force applied by the vertical force transmission column is transmitted to the vertical arc-shaped pads through the first arc-shaped pads outside the warehouse, and then to the upper plate sample; at the same time, by arranging pipes in the two warehouse covers, an upper plate rectangular pad and the upper plate sample, the upper plate sample is placed under 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 and static coupling effect in engineering activities; the upper support of the acoustic emission sensor, the vibration sensor, the matrix strain gauge and the eddy current sensor is arranged on the side surface of the upper plate sample, and the upper support of the lower plate sample is arranged on the side surface of the lower plate sample. The lower support with an eddy current sensor arranged on the surface is used to monitor the sound, vibration, strain, displacement change and other data of the upper plate sample when the sample in the sample chamber is simultaneously subjected to static confining pressure loading force, shear force, lateral loading force, normal loading force and high permeability pressure, so as to provide key data for mechanisms such as earthquake nucleation and rupture propagation process. In summary, an indoor fault activation simulation test device of the present invention can simulate the high stress environment of deep faults and simulate the dynamic and static coupling effect in engineering activities. It can be used to study the influence of injection fracturing on fault stability in engineering activities such as shale gas extraction and how engineering disturbance induces deep fault activation mechanism, and at the same time provide key data for mechanisms such as earthquake nucleation and rupture propagation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a simulation chamber of an indoor fault activation simulation test device of the present invention;

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

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

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

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

[0024] Reference numerals:

[0025] 1. Confining pressure chamber;

[0026] 2. Simulation chamber; 201. Sample chamber; 2011. Vertical arc pad; 2012. Lateral arc pad; 2013. Upper plate rectangular pad; 2014. Lower plate rectangular pad; 202. Arc pad outside the chamber; 203. Vertical force transfer column; 204. Lateral force transfer column; 205. Chamber cover; 206. Constant confining pressure shear force transfer column; 207. Constant confining pressure misalignment force transfer column; 208. Extra large heat shrink sleeve; 209. Force transfer column fixing frame; 210. Tangential loading rod; 211. Misalignment Loading rod; 212, first polytetrafluoroethylene plate; 213, second polytetrafluoroethylene plate; 214, first copper sheet; 215, second copper sheet; 216, upper lateral rectangular pad; 217, lower lateral rectangular pad; 218, lateral rectangular pad; 219, rubber strip; 220, rubber cushion; 221, transverse water sealing strip; 222, force transmission column sealing strip; 223, vibration sensor; 224, acoustic emission sensor; 225, matrix strain gauge; 226, eddy current sensor;

[0027] 3. Upper plate sample;

[0028] 4. Lower plate specimen;

[0029] 101, injection hole; 102, first channel; 103, second channel; 104, inlet cavity; 105, third channel; 106, fourth channel; 107, outlet cavity. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0031] Embodiment 1

[0032] like Figures 1 to 5 As shown, the present embodiment 1 provides an indoor fault activation simulation test device, the indoor fault activation simulation test device comprises a confining pressure chamber 1 and a simulation chamber 2 arranged inside the confining pressure chamber 1, the simulation chamber 2 comprises: a sample chamber 201, the sample chamber 201 is a cylindrical structure, and a containing space is provided in the middle of the sample chamber 201; four outer chamber arc-shaped pads 202, each of the outer chamber arc-shaped pads 202 is an arc-shaped plate-shaped structure, one arc surface of each outer chamber arc-shaped pad 202 is adapted to the cylindrical outer side wall of the sample chamber 201, and the other arc surface of each outer chamber arc-shaped pad 202 is provided with a fixing groove; the four outer chamber arc-shaped pads 202 are evenly spaced on the cylindrical outer side wall of the sample chamber 201; a vertical force transmission column 203, one end of the vertical force transmission column 203 is connected to the first outer chamber arc-shaped pad The fixing groove of the block 202 is abutted; two lateral force transmission columns 204, one end of one of the lateral force transmission columns 204 is abutted against the fixing groove of the second outer arc-shaped cushion block 202, and one end of the other lateral force transmission column 204 is abutted against the fixing groove of the third outer arc-shaped cushion block 202; the two lateral force transmission columns 204 are symmetrically arranged; two bin covers 205, each of which is provided with a force transmission column through hole, and the two bin covers 205 are respectively fixedly connected to the two ends of the sample bin 201; 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 bin 201; constant confining pressure misalignment 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 bin 201. .

[0033] An indoor fault activation simulation test device of the present invention comprises a sample chamber, four arc-shaped pads outside the chamber, 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 offset force transmission column. The sample chamber is composed of two vertical arc-shaped pads, two lateral arc-shaped pads, two upper rectangular pads and two lower rectangular pads, and a closed accommodating space is formed inside the sample chamber. The accommodating space in 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 comprises an upper plate sample and a lower plate sample. The upper plate sample is located above the lower plate sample. The two ends of the lower plate sample are respectively against the two lower rectangular pads. The constant confining pressure shear force transmission column is used to press a lower rectangular plate against the upper plate sample. The pad applies a load, giving a shear force to the lower plate sample, and applies a load to another lower rectangular pad through the constant confining pressure adaptive force transfer column, giving a compensation force to the lower plate sample, so that the magnitude of the shear force on the upper plate sample is within a controllable range; the two lateral force transfer columns are used to apply lateral loading force, and the two sides of the upper plate sample and the lower plate sample are respectively against the two lateral arc pads, and the two lateral warehouse outer arc pads correspond to the positions of the two lateral arc pads, so that the force applied by the two lateral force transfer columns to the two lateral warehouse outer arc pads can be transmitted to the upper plate sample and the lower plate sample through the lateral arc pads; the vertical force transfer column is used to apply normal loading force, and the upper end surface of the upper plate sample is against a vertical arc pad located above The positions of the arc-shaped pads outside the warehouse correspond to the vertical arc-shaped pads, so that the force applied by the vertical force transmission column is transmitted to the vertical arc-shaped pads through the first arc-shaped pads outside the warehouse, and then to the upper plate sample; at the same time, by arranging pipes in the two warehouse covers, an upper plate rectangular pad and the upper plate sample, the upper plate sample is placed under 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 and static coupling effect in engineering activities; the upper support of the acoustic emission sensor, the vibration sensor, the matrix strain gauge and the eddy current sensor is arranged on the side surface of the upper plate sample, and the upper support of the lower plate sample is arranged on the side surface of the lower plate sample. The lower support with an eddy current sensor arranged on the surface is used to monitor the sound, vibration, strain, displacement change and other data of the upper plate sample when the sample in the sample chamber is simultaneously subjected to static confining pressure loading force, shear force, lateral loading force, normal loading force and high permeability pressure, so as to provide key data for mechanisms such as earthquake nucleation and rupture propagation process. In summary, an indoor fault activation simulation test device of the present invention can simulate the high stress environment of deep faults and simulate the dynamic and static coupling effect in engineering activities. It can be used to study the influence of injection fracturing on fault stability in engineering activities such as shale gas extraction and how engineering disturbance induces deep fault activation mechanism, and at the same time provide key data for mechanisms such as earthquake nucleation and rupture propagation process.

[0034] In some possible implementations, the simulation chamber 2 further includes: an oversized heat shrink sleeve 208, which is a cylindrical structure and is sleeved on the periphery of the sample chamber 201; two force transmission column fixing frames 209, each of which is a cylindrical structure, and the two force transmission column fixing frames 209 are symmetrically arranged, one of the force transmission column fixing frames 209 is fixed to the lower part of one of the chamber covers 205, and the other of the force transmission column fixing frames 209 is fixed to the lower part of the other of the chamber covers 205; each of the force transmission column fixing frames 209 is a cylindrical structure and is symmetrically arranged. 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, and the other end of the constant confining pressure adaptive offset force transmission column 207 is located in another of the sliding spaces and is slidably connected to another of the force transmission column fixing frames 209; a 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; an adaptive offset loading rod 211, one end of the adaptive offset loading rod 211 is fixedly connected to the other end of the constant confining pressure adaptive offset force transmission column 207.

[0035] Specifically, an extra-large heat shrink sleeve is arranged on the periphery of the sample bin, which can seal the gaps existing after the two vertical arc pads, the two lateral arc pads, the two upper rectangular pads and the two lower rectangular pads are enclosed, so as to prevent the hydraulic oil in the confining pressure chamber from entering the accommodating space through the gaps in the cylindrical outer wall of the sample bin, and at the same time prevent the exudate in the accommodating space from seeping 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 offset force transmission column, and 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 offset force transmission column to slide therein when the tangential loading rod and the adaptive offset loading rod apply loading force; the tangential loading rod is used to apply shear force, and the adaptive offset loading rod is used to apply compensation force, which has a compensation effect and is used to control the size of the shear force so that it is within a controllable range.

[0036] In some possible implementations, the sample bin 201 includes: two vertical arc-shaped pads 2011, the two vertical arc-shaped pads 2011 are symmetrically spaced, one arc surface of the first arc-shaped pad 202 outside the bin is matched with the outer side wall of one vertical arc-shaped pad 2011, and one arc surface of the second arc-shaped pad 202 outside the bin is matched with the outer side wall of another vertical arc-shaped pad 2011; two lateral arc-shaped pads 2012, the two lateral arc-shaped pads 2012 are located in the middle of the two vertical arc-shaped pads 2011, and the two lateral arc-shaped pads 2012 are symmetrically spaced, and the first One arc surface of the three lateral warehouse outer arc pads 202 is matched with the outer side wall of one lateral arc pad 2012, and one arc surface of the fourth lateral warehouse outer arc pad 202 is matched with the outer side wall of another lateral arc pad 2012; wherein, the circle where the outer side wall of each vertical arc pad 2011 is located has the same diameter as the circle where the outer side wall of each lateral arc pad 2012 is located; the two vertical arc pads 2011 and the two lateral arc pads 2012 enclose a through space, and the through space is a cubic structure; the two bin covers 205 are respectively located at At the two ends of the through space, the inner side wall of one of the bin covers 205 is respectively fixedly connected to one end of the two vertical arc-shaped pads 2011 and one end of the two lateral arc-shaped pads 2012, and the inner side wall of the other bin cover 205 is respectively fixedly connected to the other end of the two vertical arc-shaped pads 2011 and the other end of the two lateral arc-shaped pads 2012; the simulation bin 2 also includes two first polytetrafluoroethylene plates 212 and four second polytetrafluoroethylene plates 213, the two first polytetrafluoroethylene plates 212 are respectively matched with the two bin covers, and each of the first polytetrafluoroethylene plates 212 has a A through hole adapted to the through space is provided in between; one of the first polytetrafluoroethylene plates 212 is located on the inner side of one of the bin covers 205, and is respectively abutted against the two vertical arc-shaped pads 2011 and the two lateral arc-shaped pads 2012; another of the first polytetrafluoroethylene plates 212 is located on the inner side of another of the bin covers 205, and is respectively abutted against the two vertical arc-shaped pads 2011 and the two lateral arc-shaped pads 2012; each of the second polytetrafluoroethylene plates 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 diameters of the circles on which the outer walls of the two vertical arc pads and the two lateral arc pads are located are the same, so that the two vertical arc pads and the two lateral arc pads together form a through space with a circular outer wall. The interior of the through space is a cubic structure for placing the upper plate sample and the lower plate sample. The upper plate sample and the lower plate sample are loaded in the through space to simulate rock and soil faults; the bin cover is located at both ends of the through space, and is fixedly connected to the vertical arc pad and the lateral arc pad respectively, playing the role of an outer closed through space; the first polytetrafluoroethylene plate is used to reduce the friction between the vertical arc pad and the lateral arc pad, and the second polytetrafluoroethylene plate is used to reduce the friction between the bin cover and the vertical arc pad, thereby reducing the friction loss during load transfer, thereby reducing the influence of the sample bin on the force of the upper plate sample and the lower plate sample, and 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 is in a cubic structure, each of which is located in the through-space, and the two upper rectangular pads 2013 are symmetrically arranged at both ends of the through-space; two lower rectangular pads 2014, each of which is in a cubic structure, each of which is located in the through-space, and the two lower rectangular pads 2014 are symmetrically arranged at both ends of the through-space; each lower rectangular pad 2014 is located below each upper rectangular pad 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 of the chamber covers An upper plate pad groove and a lower plate pad groove are provided on the inner side wall of 205, each of the upper plate rectangular pads 2013 is matched with each of the upper plate pad grooves, and the outer side of each of the upper plate rectangular pads 2013 is located in a matched upper plate pad groove and abuts against the bin cover 205; each of the lower plate rectangular pads 2014 is matched with each of the lower plate pad grooves, and the outer side of each of the lower plate rectangular pads 2014 is located in a matched lower plate pad groove and abuts against the bin cover 205; a force transfer column groove is provided in the middle of the outer side wall of each of the lower plate rectangular pads 2014, one end of the constant confining pressure shear force transfer column 206 is located in one of the force transfer column grooves and abuts against one of the lower plate rectangular pads 2014, and one end of the constant confining pressure adaptation force transfer column 207 is located in another of the force transfer column grooves and abuts against another of the lower plate rectangular pads 2014.

[0039] Specifically, two vertical arc pads, two lateral arc pads, two upper plate rectangular pads and two lower plate rectangular pads together form a containing space, the upper plate sample. The lower plate sample is located in the containing space, the two upper rectangular pads and the two lower rectangular pads are located on the inner side of the two bin covers, each upper rectangular pad and each lower rectangular pad are against the bin cover, so that the two bin covers and the containing space form a hollow cylindrical structure, so that the static confining pressure loading force on the sample bin is more uniform; the force transfer column groove is used to stabilize the force application position of the constant confining pressure shear force transfer column and the constant confining pressure adaptive force transfer column to avoid displacement during the loading process, and a load is applied to a lower rectangular pad through the constant confining pressure shear force transfer column to give a shear force to the lower plate sample, and a load is applied to another lower rectangular pad through the constant confining pressure adaptive force transfer column to give a compensation force to the lower plate sample, so that the magnitude of the shear force on the upper plate sample is within a controllable range.

[0040] In some possible implementations, an upper plate sample 3 and a lower plate sample 4 are placed in the accommodating space, the upper plate sample 3 is located above the lower plate sample 4, one end of the upper plate sample 3 is against the inner wall of one of the upper plate rectangular pads 2013, and the other end of the upper plate sample 3 is against the inner wall of another upper plate rectangular pad 2013; one end of the lower plate sample 4 is against the inner wall of one of the lower plate rectangular pads 2014, and the other end of the lower plate sample 4 is 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 plate rectangular pads 2014, the inner wall of one of the upper plate rectangular pads 2013 and the inner wall of one of the lower plate rectangular pads 2014 are located on the same straight line, and the outer wall of another of the upper plate rectangular pads 2013 and the outer wall of another of the lower plate rectangular pads 2014 are located on the same straight line; wherein, a first copper sheet 214 is arranged between one of the vertical arc pads 2011 and the upper plate sample 3, and a second copper sheet 215 is arranged between another of the vertical arc pads 2011 and the lower plate sample 4.

[0041] Specifically, the length of the upper plate sample is smaller than that of the lower plate sample, and the end of the lower plate sample subjected to the compensation force is located in the same plane as one end of the upper plate sample, so that in the process of simulating the shear force of the rock and soil fault, the lower plate sample moves along the direction of the shear force and rubs against the friction sliding surface between the upper plate sample, and at the same time, it is convenient for the eddy current displacement sensor to monitor; the first copper sheet and the second copper sheet are respectively used to reduce the friction between the vertical arc pad and the upper plate sample, and between the vertical arc pad and the lower plate sample.

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

[0043] Specifically, the first third polytetrafluoroethylene plate and the second third polytetrafluoroethylene plate are used to reduce the friction between the upper plate rectangular pad and the upper plate sample, and the third third polytetrafluoroethylene plate and the fourth third polytetrafluoroethylene plate are used to reduce the friction between the lower plate rectangular pad and the lower plate sample, reducing the friction loss during load transfer, thereby reducing the influence of the sample chamber on the force of the upper plate sample and the lower plate sample, and improving the accuracy of the test; the two upper lateral rectangular pads and the two lower lateral rectangular pads are provided with corresponding holes for accommodating vibration sensors and acoustic emission sensors; the third copper sheet and the fourth copper sheet are used to reduce the friction between the two upper lateral rectangular pads and the upper plate sample, and the fifth copper sheet and the sixth copper sheet are used to reduce the friction between the two lower lateral rectangular pads. Friction between the pad and the lower plate sample; two rubber strips are used to seal the fault gap between the upper plate sample and the lower plate sample, the rubber pad is 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 seepage 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, to avoid affecting the high osmotic pressure, the horizontal water sealing strip is used to prevent the seepage in the accommodating space from seeping out through the first channel and to prevent the seepage in the accommodating space from seeping out through the inflow cavity; under the action of the two rubber strips, four rubber pads and the horizontal water sealing strip, the interior of the accommodating space is in a sealed state, and the seepage of the seepage in the accommodating space is blocked under high osmotic pressure conditions.

[0044] In some possible implementations, an injection hole 101 is provided on the upper portion of the bin cover 205, a first channel 102 and a second channel 103 are provided on the upper plate rectangular pad 2013, the first channel 102 passes through the upper plate rectangular pad 2013, the injection hole 101 is connected to one end of the first channel 102; one end of the second channel 103 is connected to the middle end of the first channel 102, an inlet cavity 104 is provided between the upper plate rectangular pad 2013 and the lower plate rectangular pad 2014, The other end of the second channel 103 is connected to the inlet cavity 104; a pad through hole is provided on the first rubber pad layer 220, and a plate through hole is provided on the first third polytetrafluoroethylene plate, the first channel 102 is connected to the pad through hole, and the pad through hole is connected to the plate through hole; a third channel 105 and a fourth channel 106 are provided 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 through hole, and the other end of the third channel 105 is connected to the first One end of the four channels 106 is connected, and an outlet cavity 107 is provided between another upper plate rectangular pad 2013 and another lower plate rectangular pad 2014, and the other end of the fourth channel 106 is connected to the outlet cavity 107; the simulation chamber 2 also includes a first pipeline, a second pipeline and a water outlet pipe, and one end of the first pipeline sequentially 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 to enter the outlet cavity 107 to form a first path; the second pipeline 106 is connected to the outlet cavity 107 to form a first path; the first pipeline 106 is connected to ... One end of the two pipes passes through the injection hole 101, the first channel 102, and the second channel 103 in sequence to enter the inlet chamber 104 to form a second path; one end of the inlet chamber 104 is connected with one end of the outlet chamber 107 through the gap between the upper plate sample 3 and the lower plate sample 4; an outlet is opened in the middle of the other bin cover 205, and the outlet is connected with the other end of the outlet chamber 207, and one end of the outlet pipe passes through the outlet and the seepage outlet of the confining pressure chamber 1 in sequence to be connected with the outside of the confining pressure chamber 1.

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

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

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

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

[0049] Specifically, grooves corresponding to vibration sensors and acoustic emission sensors are arranged on the inner sides of the two upper lateral rectangular pads and the two lower lateral rectangular pads for accommodating vibration sensors and acoustic emission sensors. The epoxy resin adhesive layer coated on both sides of the upper plate sample and the lower plate sample has a certain thickness, which can protect the vibration sensors, acoustic emission sensors, matrix strain gauges and eddy current sensors arranged on the samples. In the present invention, the vertical force transmission column is subjected to normal loading force, and the loading force is transmitted to the vertical arc pad through the arc pad outside the warehouse, and then transmitted to the upper plate sample through the copper sheet; the lateral force transmission column is subjected to lateral loading force, and the loading force is transmitted to the lateral arc pad through the arc pad outside the warehouse, and then transmitted to the upper lateral rectangular pad and the lower lateral rectangular pad through the lateral arc pad, and finally transmitted to the upper plate sample and the lower plate sample through the epoxy resin adhesive layer; the shear force is applied by the tangential loading rod, and the shear force is transmitted to the lower plate rectangular pad through the constant confining pressure shear force transmission column, and then transmitted through the third rubber pad layer and the third polytetrafluoroethylene plate to the lower plate sample; applying compensation force through the misaligned loading rod, the compensation force is transmitted to the lower plate rectangular pad through the constant confining pressure misaligned force transmission column, and then transmitted to the lower plate sample through the fourth rubber pad and the fourth polytetrafluoroethylene plate. In summary, the load transmission of the indoor fault activation simulation test device of the present invention is accurate, so that the externally applied load can be accurately transmitted to the sample; in addition, in the present invention, the output lines of the vibration sensor, acoustic emission sensor, matrix strain gauge and eddy current sensor are all connected to the high-pressure sealing joint, which can ensure the normal communication and data transmission of the sensor line under high-pressure conditions; a monitoring system is constructed by vibration sensors, acoustic emission sensors, matrix strain gauges and eddy current sensors, so that the indoor fault activation simulation test device of the present invention can collect detailed data on the starting position, expansion direction, rate and vibration characteristics of fault rupture, which provides a scientific basis for the study of fault activation mechanism, helps to break through basic problems and technical bottlenecks, and provides support for resource and energy production capacity guarantee.

[0050] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. An indoor fault activation simulation test device, characterized in that: The indoor fault activation simulation test device comprises a confining pressure chamber and a simulation chamber arranged inside the confining pressure chamber, wherein the simulation chamber comprises: The sample chamber is cylindrical in structure and has a containing space in the middle; Four arc-shaped pads outside the bin, each of which is an arc-shaped plate-shaped structure, one arc surface of each arc-shaped pad is adapted to the cylindrical outer side wall of the sample bin, and the other arc surface of each arc-shaped pad is provided with a fixing groove; the four arc-shaped pads outside the bin are evenly spaced and arranged on the cylindrical outer side wall of the sample bin; A vertical force transmission column, one end of which is against the fixing groove of the first arc-shaped cushion block outside the warehouse; Two lateral force transmission columns, one end of one of the lateral force transmission columns abuts against the fixing groove of the second arc-shaped cushion block outside the warehouse, and one end of the other lateral force transmission column abuts against the fixing groove of the third arc-shaped cushion block outside the warehouse; the two lateral force transmission columns are symmetrically arranged; Two bin covers, each of which has a force transmission column through hole, and the two bin covers are respectively fixedly connected to the two ends of the sample bin; A constant confining pressure shear force transmission column, one end of which passes through a through hole of the force transmission column and abuts against the lower part of one end of the sample chamber; A constant confining pressure adapted staggered force transmission column, one end of which passes through another through-hole of the force transmission column and abuts against the lower portion of the other end of the sample bin.

2. An indoor fault activation simulation test device as claimed in claim 1, characterized in that: The simulation warehouse also includes: An extra-large heat shrink sleeve, which is in a cylindrical structure and is arranged on the periphery of the sample chamber; Two force transmission column fixing frames, each of which is a cylindrical structure, and the two force transmission column fixing frames are symmetrically arranged, one of which is fixed to the lower part of one of the bin covers, and the other of which is fixed to 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 to one of the force transmission column fixing frames, and the other end of the constant confining pressure adaptive force transmission column is located in the other of the sliding spaces and is slidably connected to the other of the force transmission column fixing frames; A tangential loading rod, one end of which is fixedly connected to the other end of the constant confining pressure shear force transmission column; An adaptive loading rod, one end of which is fixedly connected to the other end of the constant confining pressure adaptive force transmission column.

3. An indoor fault activation simulation test device as claimed in claim 2, characterized in that: The sample chamber comprises: Two vertical arc-shaped pads, the two vertical arc-shaped pads are symmetrically arranged at intervals, one arc surface of the first warehouse outer arc-shaped pad is matched with the outer side wall of one vertical arc-shaped pad, and one arc surface of the second warehouse outer arc-shaped pad is matched with the outer side wall of the other vertical arc-shaped pad; Two lateral arc-shaped pads, the two lateral arc-shaped pads are located in the middle of the two vertical arc-shaped pads, the two lateral arc-shaped pads are symmetrically spaced, an arc surface of the third lateral warehouse outer arc-shaped pad is matched with the outer side wall of one lateral arc-shaped pad, and an arc surface of the fourth lateral warehouse outer arc-shaped pad is matched with the outer side wall of another lateral arc-shaped pad; The two vertical arc-shaped pads and the two lateral arc-shaped pads enclose a through space, and the through space is a cubic structure; the two bin covers are respectively located at the two end ends of the through space, and the inner side wall of one bin cover is respectively fixedly connected to one end of the two vertical arc-shaped pads and one end of the two lateral arc-shaped pads, and the inner side wall of the other bin cover is respectively fixedly connected to the other end of the two vertical arc-shaped pads and the other end of the two lateral arc-shaped pads; the simulation bin also includes two first polytetrafluoroethylene plates and four second polytetrafluoroethylene plates, and the two first polytetrafluoroethylene plates are respectively fixedly connected to the other end of the two vertical arc-shaped pads and the other end of the two lateral arc-shaped pads. The ethylene plates are respectively matched with the two bin covers, and a through hole matched with the through space is opened 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 bin covers, and is respectively abutted against the two vertical arc-shaped pads and the two lateral arc-shaped pads; another of the first polytetrafluoroethylene plates is located on the inner side of the other bin cover, and is respectively abutted against the two vertical arc-shaped pads and the two 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.

4. An indoor fault activation simulation test device as claimed in claim 3, characterized in that: The sample chamber also includes: Two upper plate rectangular pads, each of which is in a cubic structure, each of which is located in the through-space, and the two upper plate rectangular pads are symmetrically arranged at two ends of the through-space; Two lower plate rectangular pads, each of which is in a cubic structure, each of which is located in the through space, and the two lower plate rectangular pads are symmetrically arranged at both ends of the through space; each of the lower plate rectangular pads is located below each of the upper plate rectangular pads, so that the two upper plate rectangular pads and the two lower plate rectangular pads enclose the through space to form the accommodating space; Among them, each of the bin cover is provided with an upper plate pad groove and a lower plate pad groove on the inner side wall, each of the upper plate rectangular pads is matched with each of the upper plate pad grooves, and the outer side of each of the upper plate rectangular pads is located in a matched upper plate pad groove and abuts against the bin cover; each of the lower plate rectangular pads is matched with each of the lower plate pad grooves, and the outer side of each of the lower plate rectangular pads is located in a matched lower plate pad groove and abuts against the bin cover; a force transfer column groove is provided in the middle of the outer side wall of each of the lower plate rectangular pads, one end of the constant confining pressure shear force transfer column is located in one of the force transfer column grooves and abuts against one of the lower plate rectangular pads, and one end of the constant confining pressure adaptation force transfer column is located in another of the force transfer column grooves and abuts against another of the lower plate rectangular pads.

5. An indoor fault activation simulation test device as claimed in claim 4, characterized in that: 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 is against the inner wall of one of the upper plate rectangular pads, and the other end of the upper plate sample is against the inner wall of another of the upper plate rectangular pads; one end of the lower plate sample is against the inner wall of one of the lower plate rectangular pads, and the other end of the lower plate sample is against the inner wall of another of the lower plate rectangular pads; the thickness of each of the upper plate rectangular pads is greater than the thickness of each of the lower plate rectangular pads, the inner wall of one of the upper plate rectangular pads and the inner wall of one of the lower plate rectangular pads are located on the same straight line, and the outer wall of another of the upper plate rectangular pads and the outer wall of another of the lower plate rectangular pads are located on the same straight line; wherein a first copper sheet is arranged between one of the vertical arc pads and the upper plate sample, and a second copper sheet is arranged between another of the vertical arc pads and the lower plate sample.

6. An indoor fault activation simulation test device as claimed in claim 5, characterized in that: The simulation warehouse also includes: Four third polytetrafluoroethylene plates, the first of which is located between one of the upper plate rectangular pads and the upper plate sample, the second of which is located between another of the upper plate rectangular pads and the upper plate sample, the third of which is located between one of the lower plate rectangular pads and the lower plate sample, and the fourth of which is located between another of the lower plate rectangular pads and the lower plate sample; Two upper lateral rectangular pads, one of which is located between the upper plate sample and one of the lateral arc-shaped pads, and a third copper sheet is arranged between one of the upper lateral rectangular pads and the upper plate sample; another upper lateral rectangular pad is located between the upper plate sample and another of the lateral arc-shaped pads, 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 of the lower lateral rectangular pads is located between the lower plate sample and one of the lateral arc pads, and a fifth copper sheet is arranged between the one of the lower lateral rectangular pads and the lower plate sample; the other lower lateral rectangular pad is located between the lower plate sample and the other of the lateral arc pads, and a sixth copper sheet is arranged between the other of the lower lateral rectangular pads and the lower plate sample; Two lateral rectangular pads, one of which is located between one of the upper lateral rectangular pads and one of the lower lateral rectangular pads, and the other of which is located between another of the upper lateral rectangular pads and another of the lower lateral rectangular pads; Two rubber strips, one of which is arranged between one of the upper lateral rectangular pads and one of the lower lateral rectangular pads, and one of which is adjacent to one of the lateral rectangular pads on a side away from one of the lateral arcuate pads; the other of which is arranged between another of the upper lateral rectangular pads and another of the lower lateral rectangular pads, and the other of which is adjacent to another of the lateral rectangular pads on a side away from another of the lateral arcuate pads; Four rubber pads, the first rubber pad is located between the first third polytetrafluoroethylene plate and one of the upper plate rectangular pads, the second rubber pad is located between the second third polytetrafluoroethylene plate and another of the upper plate rectangular pads, the third rubber pad is located between the third third polytetrafluoroethylene plate and one of the lower plate rectangular pads, and the fourth rubber pad is located between the fourth third polytetrafluoroethylene plate and another of the lower plate rectangular pads.

7. An indoor fault activation simulation test device as claimed in claim 6, characterized in that: An injection hole is provided on the upper part of the bin cover, a first channel and a second channel are provided on the upper plate rectangular pad, the first channel passes through the upper plate rectangular pad, and the injection hole is connected to one end of the first channel; one end of the second channel is connected to the middle end of the first channel, an inlet cavity is provided between an upper plate rectangular pad and a lower plate rectangular pad, and the other end of the second channel is connected to the inlet cavity; a pad through-hole is provided on the first rubber pad layer, a plate through-hole is provided on the first third polytetrafluoroethylene plate, the first channel is connected to the pad through-hole, and the pad through-hole is connected to the plate through-hole; 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 is connected to the pad through-hole, and the other end of the third channel is connected to one end of the fourth channel, an outlet cavity is provided between another upper plate rectangular pad and another lower plate rectangular pad, and the other end of the fourth channel is connected to the outlet cavity.

8. An indoor fault activation simulation test device as claimed in claim 7, characterized in that: The simulation chamber also includes a first pipe, a second pipe and an outlet pipe, one end of the first pipe passes through the injection hole, the first channel, the pad perforation, the plate perforation, the third channel and the fourth channel in sequence to enter the outlet cavity to form a first path; one end of the second pipe passes through the injection hole, the first channel and the second channel in sequence to enter the inlet cavity to form a second path; one end of the inlet cavity is connected with one end of the outlet cavity through the gap between the upper plate sample and the lower plate sample; an outlet is opened in the middle of the other chamber cover, and the outlet is connected with the other end of the outlet cavity, and one end of the outlet pipe passes through the outlet and the seepage outlet of the confining pressure chamber in sequence to be connected to the outside of the confining pressure chamber.

9. An indoor fault activation simulation test device as claimed in claim 8, characterized in that: The simulation warehouse also includes: Two transverse water sealing strips, one of which is arranged at the other end of the second channel, one of which is sealed and connected to the periphery of the first pipe; and the other transverse water sealing strip is sealed and connected to the other end of the inlet cavity; Two force transfer column sealing strips, one of which is located in one of the force transfer column through-holes, and one of which is wound around the periphery of the constant confining pressure shear force transfer column; the other force transfer column sealing strip is located in another of the force transfer column through-holes, and the other of which is wound around the periphery of the constant confining pressure shear force transfer column.

10. An indoor fault activation simulation test device as claimed in claim 9, characterized in that: The simulation warehouse also includes: A plurality of vibration sensors, wherein the plurality of vibration sensors are evenly arranged on both sides of the upper plate sample; A plurality of acoustic emission sensors, wherein the plurality of acoustic emission sensors are evenly arranged on both sides of the upper plate sample; A plurality of matrix strain gauges, wherein the plurality of matrix strain gauges are evenly arranged on both sides of the upper plate sample; A plurality of eddy current sensors, wherein upper supports of the plurality of eddy current sensors are arranged on both sides of the upper plate sample, and lower supports of the plurality of eddy current sensors are arranged on both sides of the lower plate sample, and each lower support of the eddy current sensor is arranged to correspond to the position of the upper support of a matching eddy current sensor; Among them, both sides of the upper plate sample and both sides of the lower plate sample are coated with epoxy resin glue layer, and several vibration sensors, several acoustic emission sensors, several matrix strain gauges, several upper supports of eddy current sensors and several lower supports of eddy current sensors are all located inside the epoxy resin glue layer.

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