Fault slip measurement device under artificial cave conditions and use method

Abstract

The application discloses a fault slip measurement device and method based on an artificial cave condition, which comprises a downhole mechanism, the downhole mechanism comprises a rock stratum, the inside of the rock stratum is respectively provided with a collection well and a measurement well, and a fault zone is arranged in the inside of the rock stratum. The fault slip measurement device and method based on the artificial cave condition can compatibly use a plurality of thread butt-jointed plastic hoses in combination with a fixing seat and the measurement well to measure the fault slip of the optical fiber sensor and the fault slip of the strain gauge sensor, and then, based on the BOTDA technology of the stimulated Brillouin scattering amplification effect, the influence of the fault slip on the rock stratum and the collection well as a whole can be measured by the optical fiber sensor, and meanwhile, the strain gauge sensor can more accurately measure the local strain data, so that the accuracy of the fault slip measurement data can be effectively improved, and the fault slip data information can be more comprehensively acquired.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fault slip measurement, and particularly relates to a fault slip measurement device and a use method based on an artificial cavern. BACKGROUND

[0002] With the increasing construction of underground gas storage, oil storage and other underground energy storage facilities, the demand for artificial caverns is increasing. However, the gas stored in the artificial caverns is easily affected by fault slip under high pressure conditions, leading to gas leakage, reservoir damage, and even serious safety accidents. Fault slip is usually triggered by changes in ground stress, seismic activity or human intervention (such as fracturing, drilling, blasting, etc.). When fault slip occurs, the rock mass structure will be dislocated, causing the stress field of the surrounding rock to be redistributed, and cracks or shear failure may occur on the inner wall of the cavern, thereby forming connected channels, allowing the stored gas to leak along these channels to the surface or other geological horizons, causing the reservoir pressure to drop and the storage efficiency to decrease.

[0003] Currently, research on artificial cavern gas leakage caused by fault slip at home and abroad mainly focuses on geological modeling, numerical simulation and monitoring and early warning. However, the existing technology has certain limitations in practical application. First, geological modeling and numerical simulation are limited by the uncertainty of geological conditions and the complexity of model parameters, making it difficult to accurately reflect the real-time dynamic process of fault slip. Second, existing monitoring methods mainly rely on seismic wave, microseismic monitoring and strain gauge monitoring, but these methods have many monitoring blind spots and it is difficult to obtain high-precision fault slip data in complex fault systems. In addition, the existing technology lacks real-time response and data processing capability after fault slip occurs, making it difficult to timely feedback the slip situation and take effective leakage control measures.

[0004] The present application provides a fault slip measurement device and method based on artificial cavern conditions, aiming to solve the shortcomings of existing technology in fault slip monitoring and leakage warning. Through real-time monitoring and data fusion analysis of multiple parameters during fault slip, the present application can effectively improve the accuracy and response speed of fault slip monitoring, providing strong protection for the safety of artificial cavern storage. SUMMARY

[0005] The purpose of the present application is to solve the above problems and provide a fault slip measurement device and method based on artificial cavern conditions with accurate and comprehensive data acquisition, which can effectively utilize space.

[0006] To solve the above technical problems, the technical scheme of the present application is: a fault slip measuring device based on artificial chamber conditions, comprising a downhole mechanism, the downhole mechanism comprising a rock stratum, the rock stratum having an artificial chamber, a measuring well and a fault zone respectively formed in the inside, the upper surface of the rock stratum being fixedly connected with a measuring mechanism, the upper surface of the rock stratum being provided with a connecting well, the connecting well being in communication with the artificial chamber; the measuring mechanism comprising a combined measuring unit, the combined measuring unit being arranged in the inside of the measuring well, the combined measuring unit being capable of measuring fault slip data of the rock stratum in cooperation with the measuring well; the measuring mechanism further comprising a leakage detection unit, the leakage detection unit being arranged in the inside of the artificial chamber, the leakage detection unit being capable of filling gas into the inside of the artificial chamber through the connecting well for leakage detection; the top end of the combined measuring unit being provided with a sealing mechanism, the sealing mechanism being used in cooperation with the measuring mechanism, the sealing mechanism being used for the gap between the leakage detection unit and the connecting well.

[0007] Preferably, the combined measuring unit comprises a bottom plate, the bottom surface of the bottom plate being fixedly connected with the upper surface of the rock stratum, the inside of the measuring well being provided with a plurality of plastic hoses, the ends of the plastic hoses close to each other being connected by threads, the top end of one of the plastic hoses penetrating above the bottom plate, the inner walls of the plastic hoses being fixedly connected with a plurality of fixing seats, the side surfaces of the fixing seats being respectively fixedly connected with fiber optic sensors and strain gauge sensors, the insides of the plastic hoses being provided with cables, the ends of the cables close to each other being electrically connected by conductive slip rings, each of the fiber optic sensors and the strain gauge sensors being electrically connected with the cables by wires, the top end of one of the cables being fixedly connected with a connecting plug, the inner walls of the plastic hoses being fixedly connected with fixing discs, the inner walls of the fixing discs being fixedly connected with the outer surfaces of the cables.

[0008] Preferably, among the plurality of plastic hoses, the outer surface of the plastic hose at the top is fixedly connected with a mounting disc, the inside of the mounting disc being threadedly connected with a plurality of mounting bolts, the bottom ends of the mounting bolts penetrating into the inside of the bottom plate to form threadedly connected.

[0009] Preferably, the leakage detection unit comprises a connecting disc, the bottom surface of the connecting disc is in contact with the upper surface of the bottom plate, the inner wall of the connecting disc is fixedly connected with a connecting cylinder, the bottom end of the connecting cylinder penetrates through the connecting disc and extends to the inside of the connecting well, the upper surface of the connecting disc is fixedly connected with a first air filter, one side of the first air filter is provided with a first air feeding pump, the air inlet end of the first air feeding pump is fixedly communicated with the air outlet end of the first air filter, the air outlet end of the first air feeding pump is fixedly communicated with a first control valve, the other end of the first control valve is fixedly communicated with a connecting pipe, the outer surface of the connecting pipe is fixedly communicated with a pressure gauge, the outer surface of the connecting pipe is fixedly communicated with a second control valve, and the other end of the connecting pipe is fixedly communicated with an air outlet pipe.

[0010] Preferably, the inside of the connecting disc is threadedly connected with a plurality of fixing bolts, the bottom end of each fixing bolt penetrates into the inside of the bottom plate, and the outer surface of each fixing bolt is threadedly connected with the inner wall of the bottom plate.

[0011] Preferably, the bottom surface of the first air feeding pump is fixedly connected with a support seat, the cross section of the support seat is in an inverted "U" shape structure, and the bottom surface of the support seat is fixedly connected with the upper surface of the bottom plate.

[0012] Preferably, the sealing mechanism comprises a second air filter, the bottom surface of the second air filter is fixedly connected with the upper surface of the bottom plate, one side of the second air filter is provided with a second air feeding pump, the air inlet end of the second air feeding pump is fixedly communicated with the air outlet end of the second air filter, the air outlet end of the second air feeding pump is fixedly communicated with a one-way valve, the other end of the one-way valve is fixedly communicated with a communicating pipe, the outer surface of the communicating pipe is fixedly communicated with a third control valve, the inside of the connecting cylinder is provided with an air feeding pipe, the other end of the communicating pipe is fixedly communicated with one end of the air feeding pipe, the outer surface of the air feeding pipe is fixedly connected with two stable frames, the outer surfaces of the two stable frames are fixedly connected with the inner wall of the connecting cylinder, the outer surface of the connecting cylinder is fixedly connected with two rubber air bags, the outer surface of the air feeding pipe is fixedly communicated with two air outlet pipes, and the two air outlet pipes penetrate into the inside of the rubber air bags.

[0013] Preferably, the bottom surface of the second air feeding pump is fixedly connected with a stable seat, the cross section of the stable seat is in an inverted "U" shape structure, and the bottom surface of the stable seat is fixedly connected with the upper surface of the bottom plate.

[0014] Preferably, the upper surface and the bottom surface of the rubber air bag are fixedly connected with reinforcing rings, and the inner walls of the reinforcing rings are fixedly connected with the outer surface of the connecting cylinder.

[0015] Preferably, the use method of the fault slip measurement device based on artificial cave conditions comprises the following steps:

[0016] S1, first use drilling equipment in artificial chamber beside the drill measuring well, then insert multiple plastic hose into the inside of the measuring well, when the plastic hose is inserted into the measuring well, the continuity and reliability of the plastic hose inserted into the inside of the measuring well can be ensured by the thread on the plastic hose, the plug on the conductive slip ring can also connect two cables at the same time of plastic hose docking, and because the conductive slip ring can keep the continuity of current or electrical signal under rotation, the rotation of the conductive slip ring can prevent the cable from being twisted too much when the plastic hose is docked;

[0017] S2, then connect the connecting plug with the computer terminal receiving port, use the connecting plug to cooperate with the CPU processor and running program inside the computer terminal to collect the data of the fiber optic sensor and the strain gauge sensor, and provide the working power required by the fiber optic sensor and the strain gauge sensor, when the rock stratum appears fault zone, due to the offset of the rock stratum, the plastic hose will be slightly deformed, at this time, the fiber optic sensor fault slip measurement and the strain gauge sensor fault slip measurement can be used together through the computer terminal, and based on the BOTDA technology of stimulated Brillouin scattering amplification effect, the influence of fault slip on the rock stratum and the overall artificial chamber can be measured by the fiber optic sensor, and the strain gauge sensor can measure the local strain data more accurately, so as to effectively increase the accuracy of fault slip measurement data and obtain more comprehensive fault slip data information;

[0018] S3, when the fault slip influence detection of artificial chamber is needed, only the air filtered by the first air filter is sent into the connecting well from the first control valve, connecting pipe and air outlet pipe through the suction force provided by the first air pump, due to the cooperation of the bottom plate and the connecting disc and the connecting cylinder, the top end of the connecting well can be blocked, so that the air can only enter the inside of the artificial chamber through the connecting well, when the gas pressure in the artificial chamber reaches a certain value, the first air pump stops working and the first control valve is closed, at this time, the air pressure value in the artificial chamber can be monitored through the pressure gauge, and the pressure value change in the artificial chamber can be observed, so as to detect the permeation and leakage condition of the rock stratum and the artificial chamber after fault slip through the pressure value change of the pressure gauge, simulate the influence of fault slip on the subsequent normal use of artificial chamber, provide more real data of the influence of fault slip on artificial chamber, when the fault slip influence detection of artificial chamber is completed, only the excess air in the artificial chamber can be discharged outward by opening the second control valve;

[0019] S4, in the process of filling the artificial cave with gas, the suction provided by the second air feeding pump can send the air filtered by the second air filter into the interior of the rubber air bag through the one-way valve, the communication pipe, the air feeding pipe and the air exhaust pipe, as the gas pressure in the interior of the rubber air bag gradually increases, the rubber air bag can be inflated, the inflation of the rubber air bag can block the gap between the connecting cylinder and the connecting well, the air leakage phenomenon from the outlet of the connecting well during the fault slip detection of the artificial cave can be prevented, the collection accuracy of the fault slip influence data of the artificial cave is further ensured, and when the rubber air bag is inflated to a certain extent, the second air feeding pump stops working, at this time, the gas in the interior of the rubber air bag can be prevented from leaking outward through the one-way valve, the use reliability of the rubber air bag is ensured, and when the fault slip measurement of the artificial cave is completed, the gas in the interior of the rubber air bag can be discharged outward by opening the third control valve.

[0020] The beneficial effects of the present application are:

[0021] 1、The fault slip measurement device under the condition of the artificial cave provided by the present application can use the optical fiber sensor fault slip measurement and the strain gauge sensor fault slip measurement in combination through the multi-thread butt joint plastic hose, the fixed seat and the measurement well, and then based on the BOTDA technology of the stimulated Brillouin scattering amplification effect, the influence of the fault slip on the rock stratum and the overall large range of the artificial cave can be measured through the optical fiber sensor, and the strain gauge sensor can more accurately measure the local strain data, so that the accuracy of the fault slip measurement data can be effectively increased, and the fault slip data information can be more comprehensively obtained.

[0022] 2、The leakage detection unit is arranged, the first air filter filtered air can be sent into the interior of the artificial cave through the connecting well by the first air feeding pump, and then the pressure value change in the artificial cave can be observed through the pressure gauge, the permeation leakage condition of the rock stratum and the artificial cave after the fault slip can be detected through the pressure value change of the pressure gauge, the influence of the fault slip on the subsequent normal use of the artificial cave can be simulated, and more real data of the influence of the fault slip on the artificial cave can be provided.

[0023] 3、The sealing mechanism is arranged, the second air filter filtered air can be sent into the interior of the rubber air bag through the one-way valve, the communication pipe and the air feeding pipe by the second air feeding pump, the rubber air bag can be inflated, the inflation of the rubber air bag can block the gap between the connecting cylinder and the connecting well, the air leakage phenomenon from the connecting well during the fault slip detection of the artificial cave can be prevented, and the collection accuracy of the fault slip influence data of the artificial cave is further ensured. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1is a sectional structure schematic diagram of a fault slip measuring device based on artificial chamber condition according to the present application;

[0025] Figure 2 is a sectional structure schematic diagram of stratum and artificial chamber position distribution according to the present application;

[0026] Figure 3 is a structure schematic diagram of plastic hose according to the present application;

[0027] Figure 4 is a structure schematic diagram of the present application Figure 3 is an enlarged schematic diagram of structure at A in the present application;

[0028] Figure 5 is an enlarged schematic diagram of structure at B in the present application; Figure 3

[0029] Figure 6 is a structure schematic diagram of base plate according to the present application;

[0030] Figure 7 is a sectional structure schematic diagram of connecting cylinder according to the present application;

[0031] Figure 8 is a sectional structure schematic diagram of rubber air bag and connecting cylinder according to the present application.

[0032] BRIEF DESCRIPTION OF DRAWINGS 1, downhole mechanism; 2, measuring mechanism; 3, sealing mechanism; 11, stratum; 12, artificial chamber; 13, measuring well; 14, fault zone; 15, connecting well; 21, combined measuring unit; 22, leakage detecting unit; 301, second air filter; 302, second air feeding pump; 303, one-way valve; 304, connecting pipe; 305, third control valve; 306, air feeding pipe; 307, rubber air bag; 308, air discharging pipe; 309, stabilizing seat; 310, stabilizing frame; 311, reinforcing ring; 2101, base plate; 2102, plastic hose; 2103, fixing seat; 2104, optical fiber sensor; 2105, strain gauge sensor; 2106, electric cable; 2107, conductive slip ring; 2108, connecting plug; 2109, fixing disc; 2110, mounting disc; 2111, mounting bolt; 2201, connecting disc; 2202, connecting cylinder; 2203, first air filter; 2204, first air feeding pump; 2205, first control valve; 2206, connecting pipe; 2207, pressure gauge; 2208, second control valve; 2209, air outlet pipe; 2210, fixing bolt; 2211, supporting seat. DETAILED DESCRIPTION

[0033] The present application will be further described below in conjunction with the drawings and specific embodiments:

[0034] As Figures 1 to 8 ​As shown, the fault slip measurement device based on artificial cavity condition provided by the present application comprises a downhole mechanism 1, the downhole mechanism 1 comprises a rock stratum 11, the inside of the rock stratum 11 is respectively provided with an artificial cavity 12, a measurement well 13 and a fault zone 14, the artificial cavity 2 is an artificial underground excavation cavity, which makes stress redistribution in a limited range during the underground rock stratum excavation process, ensures the bearing capacity of the surrounding rock, and the cavity rock wall is reinforced by a concrete structure, the upper surface of the rock stratum 11 is fixedly connected with a measurement mechanism 2, and the upper surface of the rock stratum 11 is provided with a connecting well 15 which is in communication with the artificial cavity 12.

[0035] The measurement mechanism 2 comprises a combined measurement unit 21, the combined measurement unit 21 is arranged in the inside of the measurement well 13, and the combined measurement unit 21 can measure the fault slip data of the rock stratum 11 in cooperation with the measurement well 13.

[0036] The combined measurement unit 21 comprises a bottom plate 2101, the bottom surface of the bottom plate 2101 is fixedly connected with the upper surface of the rock stratum 11, a plurality of plastic hoses 2102 are arranged in the inside of the measurement well 13, the plastic hose 2102 is a flexible hose which is mainly made of plastic, the ends of the plurality of plastic hoses 2102 which are close to each other are connected through threads, the top end of one of the plastic hoses 2102 penetrates to the upper side of the bottom plate 2101, the inner walls of the plurality of plastic hoses 2102 are fixedly connected with a plurality of fixing seats 2103, the side surfaces of the plurality of fixing seats 2103 are respectively fixedly connected with a fiber optic sensor 2104 and a strain gauge sensor 2105, the fiber optic sensor 2104 is of the model FS-N, and the strain gauge sensor 2105 is of the model BLT-910. A plurality of cables 2106 are arranged in the insides of the plurality of plastic hoses 2102, the ends of the plurality of cables 2106 which are close to each other are electrically connected through a conductive slip ring 2107, the conductive slip ring 2107 is an electrical component responsible for connecting and transmitting energy and signals for a rotating body, which is divided into an electric slip ring, a fluid slip ring and an optical slip ring according to the transmission medium, and can also be commonly referred to as a rotating connection or a rotation, and the conductive slip ring 2107 is of the model MHF108. Each of the fiber optic sensor 2104 and the strain gauge sensor 2105 is electrically connected with the cable 2106 through wires, the top end of one of the cables 2106 is fixedly connected with a connecting plug 2108, the inner walls of the plurality of plastic hoses 2102 are fixedly connected with fixing discs 2109, and the inner walls of each of the fixing discs 2109 are fixedly connected with the outer surfaces of the cables 2106.

[0037] Through setting the merging measuring unit 21, the fiber sensor 2104 fault slip measurement and the strain gauge sensor 2105 fault slip measurement can be used compatibly through the multiple threaded plastic hose 2102, the cooperation fixing seat 2103 and the measuring well 13, and then based on the BOTDA technology of the stimulated Brillouin scattering amplification effect, the pump pulse light at the Stokes frequency and the anti-Stokes frequency is synchronously injected into the optical fiber, the Brillouin gain-loss effect of the scattered light is used to be different in the optical path, the synchronization problem between the signals is solved, and the measurement time only needs half of the traditional DPP technology. The influence of the gain characteristics of the erbium-doped optical fiber amplifier in the sensing system on the pulse sequence decoding result is analyzed, the encoding gain under the condition of uneven gain is theoretically calculated, the influence of the fault slip on the rock stratum 11 and the artificial chamber 12 as a whole can be measured by the fiber sensor 2104, and the strain gauge sensor 2105 can measure the local strain data more accurately, so that the accuracy of the fault slip measurement data can be effectively increased, and the fault slip data information can be more comprehensively obtained.

[0038] The outer surface of the plastic hose 2102 at the top is fixedly connected with a mounting disc 2110, a plurality of mounting bolts 2111 are threadedly connected in the mounting disc 2110, and the bottom ends of the mounting bolts 2111 penetrate into the inside of the bottom plate 2101 to form a threaded connection. The mounting disc 2110 cooperates with the mounting bolts 2111 to fix the position between the uppermost plastic hose 2102 and the bottom plate 2101, and increase the use reliability of the plastic hose 2102.

[0039] The specific implementation of the embodiment is that a measuring well 13 is drilled beside the artificial chamber 12 by using a drilling device, and then a plurality of plastic hoses 2102 are inserted into the inside of the measuring well 13. When the plastic hoses 2102 are inserted into the measuring well 13, the plastic hoses 2102 can be connected by the threads on the plastic hoses 2102, to ensure the continuity and reliability of the plastic hoses 2102 inserted into the inside of the measuring well 13, and the plug on the conductive slip ring 2107 can also be connected to the two cables 2106 at the same time as the plastic hoses 2102 are connected. Moreover, the conductive slip ring 2107 can keep the continuity of the current or electrical signal in the rotating state, so that the rotation of the conductive slip ring 2107 can prevent the plastic hoses 2102 from being excessively twisted when they are connected, and then the connection plug 2108 is connected to the computer terminal receiving port, and the connection plug 2108 is used in cooperation with the computer terminal to collect the data of the optical fiber sensor 2104 and the strain gauge sensor 2105, and to provide the required power for the optical fiber sensor 2104 and the strain gauge sensor 2105. When the rock stratum 11 has a fault zone 14, due to the deviation of the rock stratum 11, the plastic hoses 2102 are slightly deformed by being squeezed, at which time the optical fiber sensor 2104 fault slip measurement method and the strain gauge sensor 2105 fault slip measurement method can be used in compatible combination through the computer terminal, and then the BOTDA technology based on the stimulated Brillouin scattering amplification effect. The influence of the fault slip on the rock stratum 11 and the artificial chamber 12 as a whole can be measured by the optical fiber sensor 2104, and the strain gauge sensor 2105 can more accurately measure the local strain data, so that the accuracy of the fault slip measurement data can be effectively increased, and the fault slip data information can be more comprehensively obtained.

[0040] As shown in Figures 6 to 8 The measuring mechanism 2 also includes a leakage detection unit 22, which is arranged in the inside of the artificial chamber 12, and the leakage detection unit 22 can fill the gas into the inside of the artificial chamber 12 through the connecting well 15 for leakage detection.

[0041] The leakage detection unit 22 comprises a connecting disc 2201, the bottom surface of the connecting disc 2201 is in contact with the upper surface of the bottom plate 2101, the inner wall of the connecting disc 2201 is fixedly connected with a connecting cylinder 2202, the bottom end of the connecting cylinder 2202 penetrates through the connecting disc 2201 and extends to the inside of the connecting well 15. The upper surface of the connecting disc 2201 is fixedly connected with a first air filter 2203, the first air filter 2203 is an SMC industrial filter, one side of the first air filter 2203 is provided with a first air feeding pump 2204, the air inlet end of the first air feeding pump 2204 is fixedly communicated with the air outlet end of the first air filter 2203, the air outlet end of the first air feeding pump 2204 is fixedly communicated with a first control valve 2205, the other end of the first control valve 2205 is fixedly communicated with a connecting pipe 2206, the outer surface of the connecting pipe 2206 is fixedly communicated with a pressure gauge 2207, and the outer surface of the connecting pipe 2206 is fixedly communicated with a second control valve 2208. The other end of the connecting pipe 2206 is fixedly communicated with an air outlet pipe 2209, and the other end of the air outlet pipe 2209 penetrates through the connecting cylinder 2202 and extends to the inside of the connecting well 15.

[0042] By arranging the leakage detection unit 22, the air filtered by the first air filter 2203 can be sent into the artificial cavern 12 through the connecting well 15 by the first air feeding pump 2204, and then the pressure value change in the artificial cavern 12 can be observed by the pressure gauge 2207, so that the permeation leakage condition of the rock stratum 11 and the artificial cavern 12 after fault slip can be detected by the pressure value change of the pressure gauge 2207, the influence of fault slip on the normal use of the subsequent artificial cavern 12 is simulated, and more real data of the influence of fault slip on the artificial cavern 12 is provided.

[0043] The inside of the connecting disc 2201 is threadedly connected with a plurality of fixing bolts 2210, the bottom end of each fixing bolt 2210 penetrates into the inside of the bottom plate 2101, and the outer surface of each fixing bolt 2210 is threadedly connected with the inner wall of the bottom plate 2101. The fixing bolts 2210 can fix the position of the connecting disc 2201 on the bottom plate 2101, so that the connecting disc 2201 is not easy to loosen, and the use reliability of the connecting disc 2201 is improved.

[0044] The bottom surface of the first air feeding pump 2204 is fixedly connected with a support seat 2211, the support seat 2211 has an inverted “U” shaped structure in cross section, and the bottom surface of the support seat 2211 is fixedly connected with the upper surface of the bottom plate 2101. The support seat 2211 can support and stabilize the position of the first air feeding pump 2204, prevent the first air feeding pump 2204 from shaking excessively during use, and increase the stability of the first air feeding pump 2204.

[0045] The specific implementation of the embodiment is: when it is necessary to detect the fault slip influence on the artificial chamber 12, only the air filtered by the first air filter 2203 is sent into the connecting well 15 through the first control valve 2205, the connecting pipe 2206 and the air outlet pipe 2209 by the suction force provided by the first air sending pump 2204, and because the bottom plate 2101 cooperates with the connecting disc 2201 and the connecting cylinder 2202, the top end of the connecting well 15 can be blocked to make the air enter the inside of the artificial chamber 12 only through the connecting well 15, when the air pressure in the inside of the artificial chamber 12 reaches a certain value, the first air sending pump 2204 stops working and the first control valve 2205 is closed, at this time, the air pressure value in the artificial chamber 12 can be monitored through the pressure gauge 2207, and the pressure value change in the artificial chamber 12 can be observed, when the pressure displayed on the pressure gauge 2207 gradually decreases, it is proved that the artificial chamber 12 has a leakage problem caused by the front fault slip, and when the pressure value in the inside of the pressure gauge 2207 remains stable for a long time, it is proved that the fault slip does not cause influence on the artificial chamber 12, thereby the permeation and leakage conditions of the rock stratum 11 and the artificial chamber 12 after the fault slip can be detected through the pressure value change of the pressure gauge 2207, the influence of the fault slip on the normal use of the subsequent artificial chamber 12 is simulated, more real data of the influence of the fault slip on the artificial chamber 12 is provided, and after the fault slip influence detection of the artificial chamber 12 is completed, only the excess air in the inside of the artificial chamber 12 can be discharged outward by opening the second control valve 2208.

[0046] The top end of the combined measuring unit 21 is provided with a sealing mechanism 3, the sealing mechanism 3 is used in cooperation with the measuring mechanism 2, and the sealing mechanism 3 is used for the gap between the leakage detection unit 22 and the connecting well 15.

[0047] The sealing mechanism 3 comprises a second air filter 301, the bottom surface of the second air filter 301 is fixedly connected with the upper surface of the bottom plate 2101, the second air filter 301 is an SMC industrial filter, one side of the second air filter 301 is provided with a second air supply pump 302, the air inlet end of the second air supply pump 302 is fixedly communicated with the air outlet end of the second air filter 301, the air outlet end of the second air supply pump 302 is fixedly communicated with a one-way valve 303, the other end of the one-way valve 303 is fixedly communicated with a communication pipe 304, and the outer surface of the communication pipe 304 is fixedly communicated with a third control valve 305. The inside of the connecting cylinder 2202 is provided with an air supply pipe 306, the other end of the communication pipe 304 is fixedly communicated with one end of the air supply pipe 306, and the outer surface of the air supply pipe 306 is fixedly connected with two stable frames 310, and the outer surfaces of the two stable frames 310 are fixedly connected with the inner wall of the connecting cylinder 2202. The outer surface of the connecting cylinder 2202 is fixedly connected with two rubber air bags 307, the outer surface of the air supply pipe 306 is fixedly communicated with two exhaust pipes 308, and the two exhaust pipes 308 penetrate into the inside of the rubber air bag 307, and the exhaust pipe 308 communicates the air supply pipe 306 and the rubber air bag 307.

[0048] By arranging the sealing mechanism 3, the air filtered by the second air filter 301 can be sent into the rubber air bag 307 through the one-way valve 303, the communication pipe 304 and the air supply pipe 306 by the second air supply pump 302, so that the rubber air bag 307 is inflated, the gap between the connecting cylinder 2202 and the connecting well 15 is sealed by the inflation of the rubber air bag 307, and the air leakage phenomenon from the connecting well 15 position during the fault slip detection of the artificial cavern 12 is prevented, and the collection accuracy of the fault slip influence data of the artificial cavern 12 is further ensured.

[0049] The bottom surface of the second air supply pump 302 is fixedly connected with a stable seat 309, the cross section of the stable seat 309 is an inverted "U" shaped structure, and the bottom surface of the stable seat 309 is fixedly connected with the upper surface of the bottom plate 2101. The stable seat 309 can improve the stability of the second air supply pump 302 during use, make the second air supply pump 302 work more stably and reliably, and ensure the use effect of the second air supply pump 302.

[0050] The upper surface and the bottom surface of the rubber air bag 307 are fixedly connected with reinforcing rings 311, and the inner walls of the reinforcing rings 311 are fixedly connected with the outer surface of the connecting cylinder 2202. The reinforcing rings 311 can increase the connection tightness of the rubber air bag 307 and the connecting cylinder 2202, so that the rubber air bag 307 and the connecting cylinder 2202 are not easy to be loose, and the cooperation sealing property of the rubber air bag 307 and the connecting cylinder 2202 is increased.

[0051] The specific implementation of the embodiment is that: during the gas filling process of the artificial chamber 12, the air filtered by the second air filter 301 can be sent into the inside of the rubber air bag 307 through the one-way valve 303, the communication pipe 304, the air supply pipe 306 and the exhaust pipe 308 by the suction force provided by the second air supply pump 302, with the gradual increase of the gas pressure in the inside of the rubber air bag 307 and the elasticity of the rubber material of the rubber air bag 307, the rubber air bag 307 can be inflated, the inflation of the rubber air bag 307 can block the gap between the connecting cylinder 2202 and the connecting well 15, the air leakage phenomenon can be prevented from occurring at the outlet position of the connecting well 15 during the fault slip detection of the artificial chamber 12, the collection accuracy of the fault slip influence data of the artificial chamber 12 is further ensured, and when the rubber air bag 307 is inflated to a certain extent, the second air supply pump 302 stops working, at this time, the gas in the inside of the rubber air bag 307 can be prevented from leaking outward through the one-way valve 303, the use reliability of the rubber air bag 307 is ensured, and when the fault slip measurement of the artificial chamber 12 is completed, the gas in the inside of the rubber air bag 307 can be discharged outward only by opening the third control valve 305.

[0052] The application further discloses a use method of the fault slip measurement device under the condition of the artificial chamber, and the use method comprises the following steps.

[0053] S1, first, a drilling device is used to drill a measurement well 13 beside the artificial chamber 12, then a plurality of plastic hoses 2102 are inserted into the inside of the measurement well 13, when the plastic hoses 2102 are inserted into the measurement well 13, the plastic hoses 2102 can be butt-jointed through the threads on the plastic hoses 2102, the continuity and reliability of the plastic hoses 2102 inserted into the inside of the measurement well 13 are ensured, meanwhile, the two cables 2106 can be connected through the plugs on the conductive slip rings 2107 when the plastic hoses 2102 are butt-jointed, and since the conductive slip rings 2107 can keep the continuity of the current or the electrical signal in the rotating state, the rotation of the conductive slip rings 2107 can prevent the plastic hoses 2102 from being excessively twisted when the plastic hoses 2102 are butt-jointed in the rotating state.

[0054] S2, then the connection plug 2108 and computer terminal receiving port connected, using the connection plug 2108 with the computer terminal internal CPU processor and running programs to collect the data of fiber optic sensor 2104 and strain gauge sensor 2105, while providing the fiber optic sensor 2104 and strain gauge sensor 2105 required for the work of electricity; When the rock 11 fault zone 14 appears, due to the offset of rock 11, will squeeze the plastic hose 2102 slight deformation, at this time can be used by the computer terminal compatible combination of fiber optic sensor 2104 fault slip measurement and strain gauge sensor 2105 fault slip measurement, and then based on the BOTDA technology of stimulated Brillouin scattering amplification effect, can be measured by fiber optic sensor 2104 fault slip on the rock 11 and artificial cave 12 overall large range caused by the impact of strain gauge sensor 2105, which can more accurately measure the local strain data, so as to effectively increase the accuracy of fault slip measurement data, can more comprehensive access to fault slip data information.

[0055] S3, when the need for artificial cave 12 fault slip influence detection, only need to provide the suction of the first air pump 2204, the first air filter 2203 filtered air, from the first control valve 2205, connecting pipe 2206 and air outlet pipe 2209 into the connection well 15 inside, due to the bottom plate 2101 with the connection disc 2201 and connecting cylinder 2202, can block the top of the connection well 15, so that air can only through the connection well 15 into the inside of artificial cave 12, when the gas pressure in the artificial cave 12 reaches a certain value, the first air pump 2204 stop working, and close the first control valve 2205, at this time through the pressure gauge 2207 can not only monitor the air pressure in the artificial cave 12, but also can observe the pressure value change in the artificial cave 12, and then can be detected by the pressure value change of pressure gauge 2207 after the fault slip of rock 11 and artificial cave 12 permeation leakage condition, simulation fault slip on the subsequent artificial cave 12 normal use caused by the influence, provide more real fault slip on the artificial cave 12 influence data, when the artificial cave 12 fault slip influence detection is completed, only need to open the second control valve 2208 to discharge the excess air in the artificial cave 12.

[0056] S4, in the process of filling gas into the artificial cave 12, the air filtered by the second air filter 301 can be sent into the interior of the rubber air bag 307 through the one-way valve 303, the communication pipe 304, the air sending pipe 306 and the air exhaust pipe 308 by the suction force provided by the second air sending pump 302, with the gradual increase of the gas pressure in the interior of the rubber air bag 307, the rubber air bag 307 can be inflated, the gap between the connecting cylinder 2202 and the connecting well 15 can be sealed by the inflation of the rubber air bag 307, the air leakage phenomenon can be prevented from occurring at the outlet position of the connecting well 15 when the artificial cave 12 is used to detect fault slip, the collection accuracy of the fault slip influence data of the artificial cave 12 is further ensured, and when the rubber air bag 307 is inflated to a certain extent, the second air sending pump 302 stops working, at this time, the gas in the interior of the rubber air bag 307 can be prevented from leaking outward through the one-way valve 303, the use reliability of the rubber air bag 307 is ensured, and when the fault slip measurement of the artificial cave 12 is completed, the gas in the interior of the rubber air bag 307 can be discharged outward by only opening the third control valve 305.

[0057] Those skilled in the art will realize that the embodiments described herein are for the purpose of helping the reader understand the principles of the present application and should be understood as not limiting the scope of the present application to such specific embodiments and examples. Those skilled in the art can make various other specific modifications and combinations according to the technical inspiration disclosed in the present application without departing from the spirit of the present application, and these modifications and combinations are still within the scope of the present application.

Claims

1. A fault slip measurement device based on artificial cave conditions, characterized by: The invention comprises a downhole mechanism (1), wherein the downhole mechanism (1) comprises a rock layer (11), wherein an artificial cavern (12), a measuring well (13) and a fault zone (14) are respectively opened inside the rock layer (11), wherein the upper surface of the rock layer (11) is fixedly connected with a measuring mechanism (2), wherein a connecting well (15) is opened on the upper surface of the rock layer (11), wherein the connecting well (15) is connected with the artificial cavern (12); wherein the measuring mechanism (2) comprises a combined measuring unit (21), wherein the combined measuring unit (21) is arranged inside the measuring well (13), and wherein the combined measuring unit (21) can be equipped with a measuring device (21). The combined measurement well (13) measures fault slip data of the rock layer (11); the measurement mechanism (2) further includes a leakage detection unit (22), which is arranged inside the artificial cave (12), and the leakage detection unit (22) can fill gas into the artificial cave (12) through the connecting well (15) to perform leakage detection; the top of the combined measurement unit (21) is provided with a sealing mechanism (3), which is used in conjunction with the measurement mechanism (2), and the sealing mechanism (3) is used to seal the gap between the leakage detection unit (22) and the connecting well (15); The combined measurement unit (21) includes a bottom plate (2101), the bottom surface of the bottom plate (2101) is fixedly connected to the upper surface of the rock layer (11), and a plurality of plastic hoses (2102) are provided inside the measurement well (13), and the ends of the plurality of plastic hoses (2102) close to each other are connected by threads, and the top end of one of the plastic hoses (2102) passes through the top of the bottom plate (2101), and the inner walls of the plurality of plastic hoses (2102) are fixedly connected to a plurality of fixing seats (2103), and the side surfaces of the plurality of fixing seats (2103) are fixedly connected to the optical fiber sensor (2104) and the strain gauge sensor (2104). 105), a cable (2106) is provided inside each of the plastic hoses (2102), and the ends of the cables (2106) close to each other are electrically connected through a conductive slip ring (2107), and each of the optical fiber sensors (2104) and the strain gauge sensors (2105) is electrically connected to the cable (2106) through a wire, and the top end of one of the cables (2106) is fixedly connected to a connecting plug (2108), and the inner walls of the plurality of plastic hoses (2102) are fixedly connected to a fixed disk (2109), and the inner wall of each fixed disk (2109) is fixedly connected to the outer surface of the cable (2106); The leakage detection unit (22) includes a connection disk (2201), the bottom surface of the connection disk (2201) contacts the upper surface of the bottom plate (2101), the inner wall of the connection disk (2201) is fixedly connected to a connection cylinder (2202), the bottom end of the connection cylinder (2202) passes through the connection disk (2201) and extends to the inside of the connection well (15), the upper surface of the connection disk (2201) is fixedly connected to a first air filter (2203), a first air pump (2204) is provided on one side of the first air filter (2203), and the air inlet end of the first air pump (2204) is connected to the first air filter (2203). The air outlet end of the device (2203) is fixedly connected, the air outlet end of the first air pump (2204) is fixedly connected to the first control valve (2205), the other end of the first control valve (2205) is fixedly connected to the connecting pipe (2206), the outer surface of the connecting pipe (2206) is fixedly connected to the pressure gauge (2207), the outer surface of the connecting pipe (2206) is fixedly connected to the second control valve (2208), the other end of the connecting pipe (2206) is fixedly connected to the air outlet pipe (2209), and the other end of the air outlet pipe (2209) passes through the connecting cylinder (2202) and extends to the interior of the connecting well (15).

2. The fault slip measurement device based on artificial cave conditions according to claim 1 is characterized in that: Among the plurality of plastic hoses (2102), the outer surface of the plastic hose (2102) located at the top is fixedly connected to a mounting plate (2110), the internal thread of the mounting plate (2110) is connected to a plurality of mounting bolts (2111), and the bottom ends of the mounting bolts (2111) all penetrate into the interior of the bottom plate (2101) to form a threaded connection.

3. The fault slip measurement device based on artificial cave conditions according to claim 1 is characterized in that: The internal thread of the connecting plate (2201) is connected to a plurality of fixing bolts (2210), the bottom ends of the fixing bolts (2210) are all passed through the interior of the bottom plate (2101), and the outer surfaces of the fixing bolts (2210) are all threadedly connected to the inner wall of the bottom plate (2101).

4. The fault slip measurement device based on artificial cave conditions according to claim 1 is characterized in that: The bottom surface of the first air pump (2204) is fixedly connected to a support base (2211), the cross-section of the support base (2211) is an inverted "U"-shaped structure, and the bottom surface of the support base (2211) is fixedly connected to the upper surface of the bottom plate (2101).

5. The fault slip measurement device based on artificial cave conditions according to claim 1 is characterized in that: The sealing mechanism (3) includes a second air filter (301), the bottom surface of the second air filter (301) is fixedly connected to the upper surface of the bottom plate (2101), a second air pump (302) is provided on one side of the second air filter (301), the air inlet end of the second air pump (302) is fixedly connected to the air outlet end of the second air filter (301), the air outlet end of the second air pump (302) is fixedly connected to a one-way valve (303), the other end of the one-way valve (303) is fixedly connected to a connecting pipe (304), and the outer surface of the connecting pipe (304) is fixedly connected to a third control valve (305); An air supply pipe (306) is provided inside the connecting tube (2202), the other end of the connecting tube (304) is fixedly connected to one end of the air supply pipe (306), the outer surface of the air supply pipe (306) is fixedly connected to two stabilizing frames (310), the outer surfaces of the two stabilizing frames (310) are fixedly connected to the inner wall of the connecting tube (2202), the outer surface of the connecting tube (2202) is fixedly connected to two rubber airbags (307), the outer surface of the air supply pipe (306) is fixedly connected to two exhaust pipes (308), and the two exhaust pipes (308) are both inserted into the interior of the rubber airbag (307).

6. The fault slip measurement device based on artificial cave conditions according to claim 5 is characterized in that: The bottom surface of the second air supply pump (302) is fixedly connected to a stabilizing seat (309), the cross section of the stabilizing seat (309) is an inverted "U"-shaped structure, and the bottom surface of the stabilizing seat (309) is fixedly connected to the upper surface of the bottom plate (2101).

7. The fault slip measurement device based on artificial cave conditions according to claim 5 is characterized in that: The upper surface and the bottom surface of the rubber airbag (307) are both fixedly connected to a reinforcement ring (311), and the inner wall of the reinforcement ring (311) is fixedly connected to the outer surface of the connecting tube (2202).

8. The fault slip measurement device based on artificial cave conditions according to claim 5, characterized in that: The method for using the fault slip measurement device under artificial cave conditions comprises the following steps: S1. First, a measuring well (13) is drilled next to the artificial cave (12) using a drilling device, and then a plurality of plastic hoses (2102) are inserted into the measuring well (13). When the plastic hoses (2102) are inserted into the measuring well (13), the plastic hoses (2102) are connected by the threads provided on the plastic hoses (2102) to ensure the continuity and reliability of the plastic hoses (2102) when inserted into the measuring well (13). At the same time, the plug provided on the conductive slip ring (2107) is used to connect the two cables (2106) when the plastic hoses (2102) are connected. Since the conductive slip ring (2107) can maintain the connection of the current or the electrical signal when rotating, the rotation of the conductive slip ring (2107 prevents the cable (2106) from being excessively twisted when the plastic hoses (2102) are rotated and connected. S2. Then connect the connecting plug (2108) to the receiving port of the computer terminal, and use the connecting plug (2108) to cooperate with the CPU processor inside the computer terminal and the running program to collect data from the optical fiber sensor (2104) and the strain gauge sensor (2105), and at the same time provide the optical fiber sensor (2104) and the strain gauge sensor (2105) with the required power. When a fault zone (14) appears in the rock layer (11), the plastic hose (2102) will be squeezed and slightly deformed due to the deviation of the rock layer (11). At this time, the optical fiber can be The fault slip measurement sensor (2104) and the fault slip measurement strain gauge sensor (2105) are used in a compatible combination through a computer terminal, and then based on the BOTDA technology of the stimulated Brillouin scattering amplification effect, the optical fiber sensor (2104) measures the impact of the fault slip on the entire large-scale rock layer (11) and the artificial cave (12), while the strain gauge sensor (2105) measures the local strain data more accurately, thereby effectively increasing the accuracy of the fault slip measurement data and being able to obtain more comprehensive fault slip data information; S3. When it is necessary to detect the impact of fault slip on the artificial cave (12), the air filtered by the first air filter (2203) is sent into the interior of the connecting well (15) through the first control valve (2205), the connecting pipe (2206) and the air outlet pipe (2209) by the suction force provided by the first air pump (2204). Since the bottom plate (2101) cooperates with the connecting disk (2201) and the connecting cylinder (2202), the top of the connecting well (15) can be blocked, so that the air can only enter the interior of the artificial cave (12) through the connecting well (15). When the gas pressure inside the artificial cave (12) reaches a certain value, the first air pump (2204) stops working and is turned off. Close the first control valve (2205). At this time, the pressure gauge (2207) can not only monitor the air pressure value in the artificial cavern (12), but also observe the pressure value change in the artificial cavern (12). Then, the permeation leakage condition of the rock layer (11) and the artificial cavern (12) after the fault slip can be detected through the pressure value change of the pressure gauge (2207). The impact of the fault slip on the subsequent normal use of the artificial cavern (12) is simulated, and more realistic data on the impact of the fault slip on the artificial cavern (12) is provided. After the fault slip impact detection of the artificial cavern (12) is completed, it is only necessary to open the second control valve (2208) to discharge the excess air inside the artificial cavern (12). S4. During the process of gas filling the artificial cave (12), the air filtered by the second air filter (301) is sent into the interior of the rubber airbag (307) through the one-way valve (303), the connecting pipe (304), the air supply pipe (306) and the exhaust pipe (308) by the suction force provided by the second air supply pump (302). As the gas pressure inside the rubber airbag (307) gradually increases, the rubber airbag (307) expands, and the expansion of the rubber airbag (307) is used to seal the gap between the connecting tube (2202) and the connecting well (15), thereby preventing the artificial cave (12) from being fractured. During the slip detection, air leakage occurs at the outlet of the connecting well (15), which further ensures that the slip of the fault in the artificial cave (12) affects the accuracy of data collection, and when the rubber airbag (307) expands to a certain extent, the second air pump (302) stops working. At this time, the one-way valve (303) can prevent the gas inside the rubber airbag (307) from leaking outward, ensuring the reliability of the use of the rubber airbag (307). After the slip measurement of the fault in the artificial cave (12) is completed, it is only necessary to open the third control valve (305) to discharge the gas inside the rubber airbag (307) outward.

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