CN208547549U - Coal seam containing gas rupture process many reference amounts experimental rig under static-dynamic coupling - Google Patents

Coal seam containing gas rupture process many reference amounts experimental rig under static-dynamic coupling Download PDF

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Publication number
CN208547549U
CN208547549U CN201821002136.6U CN201821002136U CN208547549U CN 208547549 U CN208547549 U CN 208547549U CN 201821002136 U CN201821002136 U CN 201821002136U CN 208547549 U CN208547549 U CN 208547549U
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pressure
connect
dynamic
static
containing gas
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肖晓春
丁鑫
吕祥锋
吴迪
王磊
樊玉峰
沈天宇
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Liaoning Technical University
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Liaoning Technical University
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Abstract

Coal seam containing gas rupture process many reference amounts experimental rig under a kind of static-dynamic coupling belongs to static-dynamic load coal seam containing gas and destroys test device technical field.Coal seam containing gas rupture process many reference amounts experimental rig under the static-dynamic coupling, including pressure-resistant cavity, hole clearance flow pressure system, confining pressure and Hydraulic Power Transmission System, seaming chuck and push-down head are provided in the pressure resistance cavity, coal petrography sample is set among the seaming chuck and push-down head, one end of dynamic load compression bar passes through blind flange and connect with seaming chuck, the other end passes through the first cylinder shape connector and connect with the piston coaxial of dynamic load hydraulic cylinder, one end of static load compression bar passes through ring flange and connect with push-down head, and the top of the other end and strain gauge is coaxially connected.Coal seam containing gas rupture process many reference amounts experimental rig establishes the coupling mechanism that three kinds of load develop with unstability to coal rock specimen mechanical behavior under the static-dynamic coupling, discloses Deep Mine coal seam containing gas and destroys origin mechanism.

Description

Coal seam containing gas rupture process many reference amounts experimental rig under static-dynamic coupling
Technical field
The utility model relates to static-dynamic load coal seam containing gas to destroy test device technical field, in particular to a kind of dynamic- Coal seam containing gas rupture process many reference amounts experimental rig under quiet coupling.
Background technique
Coal industry in recent years formally enters the deep mining stage, by deep " three high one disturbance " effect, bump and Coal and gas prominent accident scale, occurrence frequency show apparent ascendant trend, especially have both bump and coal with watt The composite power disaster accident of this prominent features happens occasionally, and analyse in depth disaster characterization be exactly deep be in high stress, watt The unstable phenomenon that coal body under this pressure environment is induced by human engineering disturbance.It actively develops under high stress, gas pressure environment Coal body shock loading failure test specifies loaded destructive characteristics, explores coal body solid-gased coupling and acts on mechanical mechanism, discloses impact- Prominent compound inherence of disaster is cleared loaded sound emission, charge signal temporal and spatial evolution in the process, is proposed based on sound emission and electricity Lotus incudes the deep Coal body Instability comprehensive judgement method of precursor information to Deep Mine production environment is improved, and realizes deep coal money Source safety and high efficiency has important scientific meaning and engineering value.
Relatively fewer about the mechanics row experimental rig under coal, the effect of rock lash load at present, existing research is main Carry out different confining pressures, the pressure coal body shock loading destruction of hole clearance flow using SHBP device but experimentation complexity, and being able to satisfy While test can also to coal petrography damage development in entire loaded destructive process, sound emission, charge signal real-time monitoring device So far report is had not yet to see.Deep impact-protrude compound disaster breed mechanism and precursor signal identification, determination method is built It is vertical not only to need theoretically further investigated, while the corresponding physical test research of study emphasis is also needed, therefore develop one kind Easy to operate, strong applicability can collect and record what coal seam with gas destructive process under high confining pressure, impact loading generated Sound emission, electric charge induction signal experimental rig be very necessary.
Comprehensive field measurement and theory analysis, in order to reflect experimental rig really as far as possible, the difference of deep coal body is answered Power state and Engineering Disturbance impact load stress environment, more fully acquire with loaded destructive process generate sound emission with Charge signal, utility model device meet following necessary condition: 1. can carry out statics load, apply high hole clearance flow to coal and rock Pressure, axis pressure and confining pressure are to simulate original loaded state;Coal body is loaded for dynamics 2. can mention, make impact test carry out it is simple, Facilitate feasible;3. having form that can observe entire loaded destructive process;4. there is reasonable acquisition probe distribution method, has letter Number high speed acquisition function, sufficiently acquires, records and stores with charge signal to sound emission.
Utility model content
Of the existing technology in order to solve the problems, such as, the utility model provides under a kind of static-dynamic coupling containing gas Coal petrography rupture process many reference amounts experimental rig, experimental rig structure is simple and convenient to operate, parameter is accurate, can be applied on coal petrography Different confining pressures, hole clearance flow pressure, and there is shirtsleeve operation method to apply shock loading to coal body, while destructive process production can be obtained Raw stress, strain, hole clearance flow buckling, real-time monitoring simultaneously obtain coal petrography and destroy external crack evolution Feature, sound emission and electricity Lotus signal temporal and spatial evolution is impacted-is protruded compound disaster for exploration deep and breed development process, establishes and be based on sound emission-electricity The deep Coal body Instability comprehensive judgement method of lotus signal provides theoretical foundation and Engineering Guidance.
To achieve the goals above, the utility model uses following technical scheme:
The utility model provides coal seam containing gas rupture process many reference amounts experimental rig under a kind of static-dynamic coupling, Including pressure-resistant cavity, hole clearance flow pressure system, confining pressure and Hydraulic Power Transmission System;
It is provided with seaming chuck and push-down head in the pressure resistance cavity, coal petrography is set among the seaming chuck and the push-down head Sample, the top of the pressure resistance cavity are equipped with the first opening, and first opening is connect with blind flange, the top of the blind flange It is connect with the bottom of the first cylinder shape connector, the top of the first cylinder shape connector and the shell of dynamic load hydraulic cylinder connect It connects, dynamic load compression bar is equipped in the first cylinder shape connector, one end of the dynamic load compression bar passes through blind flange and seaming chuck connects It connects, the other end passes through the first cylinder shape connector and connect with the piston coaxial of dynamic load hydraulic cylinder, the lower part of the pressure resistance cavity Equipped with the second opening, second opening is connect with ring flange, and the ring flange is equipped with multiple fluid-tight transmission holes, the method Blue pan bottom is connect with the top of the second cylinder shape connector, the bottom of the second cylinder shape connector and static load hydraulic cylinder The top of shell connects, and the bottom of the static load hydraulic cylinder shell is fixedly arranged on pedestal, in the second cylinder shape connector Equipped with static load compression bar, one end of the static load compression bar passes through ring flange and connect with the push-down head, the other end and strain gauge Top it is coaxially connected, the bottom of the strain gauge is connect with the piston of static load hydraulic cylinder, the pressure resistance cavity lower part Two sides connect respectively with the top of an elevating ram, the bottom of the elevating ram is fixedly arranged on the pedestal, described resistance to Circumferentially arranged in the middle part of pressure cavity to have multiple pressure-resistant forms and multiple electrodes seat, the fixed acoustic emission of coal petrography specimen surface is visited The data line of head, the acoustic emission probe is exported through the fluid-tight transmission hole, and is connect with Acquisition Instrument, the pressure resistance cavity Gap setting between the coal petrography sample has micro- electric induction pole piece;
The hole clearance flow pressure system includes the first external air source, pressure regulator valve, pressure gauge and flowmeter, and the pressure gauge passes through Pipeline is connect with the pressure regulator valve, while the pressure regulator valve is connect by pipeline with first external air source, the seaming chuck It is provided with hole clearance flow indentation mouth, the hole clearance flow indentation mouth is by pipeline and a fluid-tight transmission hole close to pressure-resistant cavity One end connection, while the other end of the fluid-tight transmission hole is connect by pipeline with the pressure gauge, the push-down head is set It is equipped with hole clearance flow and extrudes mouth, the hole clearance flow extrudes mouth by pipeline and another fluid-tight transmission hole close to the pressure-resistant chamber One end of body connects, while the other end of the fluid-tight transmission hole is connect by pipeline with the flowmeter;
The confining pressure is provided by the second extraneous gas source, and the described second extraneous gas source is filled with by fluid-tight transmission hole to institute State pressure-resistant cavity;
The Hydraulic Power Transmission System includes that fuel tank, dynamic loading oil circuit, dead load oil circuit and elevating ram add unloading oil circuit, institute It states fuel tank and is provided with electric-motor pump, the electric-motor pump is that the dynamic loading oil circuit, dead load oil circuit and elevating ram add unloading oil circuit Power source is provided, the dynamic loading oil circuit includes two bladder type hydropneumatic accumulators, first pressure transmitter, solenoid valve and proportioning valve, institute It states proportioning valve to connect with dynamic load hydraulic cylinder, the servo valve of the dead load oil circuit is connect with the static load hydraulic cylinder, described Elevating ram adds unloading oil circuit to connect with the elevating ram.
Thermoplastic set is enclosed with outside the coal petrography sample.
By rubber seal rings for seal, the ring flange is equipped in gap between the pressure resistance cavity and the ring flange Threaded hole, the ring flange are threadedly coupled with the pressure-resistant cavity.
The first circular groove is arranged in one end that the seaming chuck is connect with the dynamic load compression bar, and the dynamic load compression bar is plugged into In first circular groove, the second circular groove is arranged in one end that the static load compression bar is connect with the push-down head, under described Pressure head is plugged into second circular groove.
The section of one end that the seaming chuck and the push-down head are connect with the coal petrography sample respectively be simultaneously it is rectangular or Person is round.
The side of the second cylinder shape connector is equipped with hollow out sliding slot, and the static load compression bar is vertical with tip bar to be connect, institute It states tip bar and is slidably connected by the hollow out sliding slot with grating sensor.
The pressure resistance form is 2, and the electrode tip holder is 4.
The acoustic emission probe is 6-12.
In the utility model under a kind of static-dynamic coupling coal seam containing gas rupture process many reference amounts experimental rig it is beneficial Effect is: can more really simulate the shock vibration of the loaded stress state of underground coal petrography and the induction of mankind's mining activity, observe coal The loaded destructive process of rock, while to broken under the environmental pressure of coal seam containing gas, hole clearance flow pressure and shock loading three's collective effect Stress, axial strain, gas or water pressure and the sound emission in destructive process, charge signal temporal and spatial evolution during bad Be monitored, specify ambient stress, influence that hole clearance flow pressure and shock loading destroy coal petrography with contact, establish three kinds of load pair The coupling mechanism that coal rock specimen mechanical behavior develops with unstability discloses Deep Mine coal seam containing gas and destroys origin mechanism, Reliable experimental basis is provided for the prevention and treatment of coal and rock dynamic disaster.
Detailed description of the invention
Fig. 1 is coal seam containing gas rupture process many reference amounts experimental rig under static-dynamic coupling provided by the utility model Main view;
Fig. 2 is the pressure-resistant cavity top view provided by the utility model with form;
Fig. 3 is the cross-sectional view of ring flange provided by the utility model;
Fig. 4 is the top view of ring flange provided by the utility model;
Fig. 5 is the schematic diagram of Hydraulic Power Transmission System provided by the utility model.
Wherein,
1- pressure resistance cavity, 2- blind flange, 3- ring flange, 4- dynamic load hydraulic cylinder, 5- the first cylinder shape connector, 6- dynamic load Compression bar, 7- coal petrography sample, 8- seaming chuck, 9- push-down head, 10- pressure resistance form, 11- electrode tip holder, 12- static load compression bar, 13- second Cylindrical connecting member, 14- elevating ram, 15- strain gauge, 16- static load hydraulic cylinder, 17- pedestal, the micro- electric induction pole 18- Piece, 19- fluid-tight transmission hole, 20- fuel tank, 21- dynamic loading oil circuit, 22- dead load oil circuit, 23- elevating ram add unloading oil Road.
Specific embodiment
Of the existing technology in order to solve the problems, such as, as shown in Figures 1 to 5, the utility model provides a kind of static-dynamic coupling Cooperate lower coal seam containing gas rupture process many reference amounts experimental rig, including pressure-resistant cavity 1, hole clearance flow pressure system and hydraulic drive System, in the present embodiment, pressure-resistant cavity 1 is the cylindrical structure of cast steel, and has high-air-tightness, preferably 40Cr Steel.
It is provided with seaming chuck 8 and push-down head 9 in pressure-resistant cavity 1, coal petrography sample 7 is set among seaming chuck 8 and push-down head 9, Thermoplastic set, the company that the upper and lower part of coal petrography sample 7 is connect with seaming chuck 8 and push-down head 9 respectively are enclosed with outside coal petrography sample 7 The place of connecing is compressed with sealing ring, the section of one end that seaming chuck 8 and push-down head 9 are connect with coal petrography sample 7 respectively be simultaneously it is rectangular or Person is round.In the present embodiment, seaming chuck 8 and push-down head 9 are made of high strength steel, and seaming chuck 8 is truncated cone-shaped, and push-down head 9 is Cylinder, coal petrography sample 7 are fixed between seaming chuck 8 and the end face of push-down head 9, pass through thermoplastic set and the pressure-resistant cavity of outside package The isolation of 1 internal pressure environment, the section of one end that seaming chuck 8 and push-down head 9 are connect with coal petrography sample 7 respectively is 50 simultaneously × The circle that the rectangular or diameter of 50mm is 50mm is, it can be achieved that rushing under the conditions of various sizes of 7 three axis of coal seam containing gas sample Hit load test.
The top of pressure-resistant cavity 1 is equipped with the first opening, and the first opening is connect with blind flange 2, the top of blind flange 2 and first The bottom of cylindrical connecting member 5 connects, the top of the first cylinder shape connector 5 and the cage connection of dynamic load hydraulic cylinder 4, flange It is connected by high-strength bolts between lid 2, the first cylinder shape connector 5 and the shell of dynamic load hydraulic cylinder 4, fully ensures that each portion The strength and stability of part junction, the first cylinder shape connector 5 is interior to be equipped with dynamic load compression bar 6, and one end of dynamic load compression bar 6 passes through method Blue lid 2 is connect with seaming chuck 8, and the other end passes through the first cylinder shape connector 5 and connect with the piston coaxial of dynamic load hydraulic cylinder 4, Dynamic load compression bar 6 moves in the first cylinder shape connector 5, and one end setting first that seaming chuck 8 is connect with dynamic load compression bar 6 is round recessed Slot, dynamic load compression bar 6 are plugged into the first circular groove, and the lower part of pressure-resistant cavity 1 is equipped with the second opening, the second opening and ring flange 3 connections, for the gap between pressure-resistant cavity 1 and ring flange 3 by rubber seal rings for seal, ring flange 3 is equipped with threaded hole, flange Disk 3 is threadedly coupled with pressure-resistant cavity 1.In the present embodiment, the gap between pressure-resistant cavity 1 and ring flange 3 is minim gap, flange Disk 3 is the closed multichannel ring flange of steel, and rubber seal is O-shaped rubber seal, fully ensures that the stability of pressure-resistant cavity 1 With the safety of entire experimental rig.
Ring flange 3 is equipped with multiple fluid-tight transmission holes 19, the hole for being applied outside by fluid-tight transmission hole 19 Stream pressure and inside cavity confining pressure are filled in pressure-resistant cavity 1, and the conducting wire of acoustic emission probe are imported into pressure-resistant cavity 1, flange 3 bottom of disk is connect with the top of the second cylinder shape connector 13, and in the present embodiment, 3 bottom of ring flange is connect with the second cylinder shape The top of part 13 is fixedly connected using high-strength bolt, outside the bottom of the second cylinder shape connector 13 and static load hydraulic cylinder 16 The top of shell connects, and the bottom of 16 shell of static load hydraulic cylinder is fixedly arranged on pedestal 17, ring flange 3, the second cylinder shape connector Be connected by high-strength bolts between 13 and the shell of static load hydraulic cylinder 16, fully ensure that each component junction intensity and Stability, the second cylinder shape connector 13 is interior to be equipped with static load compression bar 12, and the material of static load compression bar 12 is steel, static load compression bar 12 One end pass through ring flange 3 connect with push-down head 9, the top of the other end and strain gauge 15 is coaxially connected, static load compression bar 12 and The second circular groove is arranged in one end that push-down head 9 connects, and push-down head 9 is plugged into the second circular groove, strain gauge 15 Bottom is connect with the piston of static load hydraulic cylinder 16.In the present embodiment, strain gauge 15 is spoke type strain gauge, stress The bottom of sensor 15 is connect with the piston coaxial of static load hydraulic cylinder 16, and static load hydraulic cylinder 16 provides the load of 400kN, quiet Carrier fluid compressing cylinder 16 pushes strain gauge 15 to move, and then pushes static load compression bar 12 inside the second cylinder shape connector 13 It moves back and forth to achieve the purpose that Load-unload lotus, strain gauge 15 is to the stress variation during monitoring Load-unload lotus.
The two sides of pressure-resistant 1 lower part of cavity are connect with the top of an elevating ram 14 respectively, in pressure-resistant 1 lower part two sides of cavity It is installed with threaded hole, pressure-resistant cavity 1 is threadedly coupled with two elevating rams 14 of lower part, and two elevating rams 14 are with pressure-resistant cavity 1 axis is symmetrical arranged for symmetry axis, and for elevating ram 14 to automatic lifting pressure resistance cavity 1, the bottom of elevating ram 14 is fixed In on pedestal 17.In the present embodiment, mechanization ground closure or openness pressure resistance cavity 1, pressure-resistant cavity 1 are realized using elevating ram 14 After closure, pressure-resistant cavity 1 is closely connect with ring flange 3, and passes through the fixed check pressure resistance of threaded hole using 12 high-strength bolts Cavity 1 guarantees the stable safety with experimental rig of the pressure of pressure-resistant cavity 1.
Pressure-resistant 1 middle part of cavity is circumferentially arranged multiple pressure-resistant forms 10 and multiple electrodes seat 11, and pressure-resistant form 10 is 2 A, electrode tip holder 11 is 4, and pressure-resistant form 10 is pressure-resistant cobalt glass form, and 7 surface of coal petrography sample is installed with acoustic emission probe, coal 7 surface of rock sample is fixed with acoustic emission probe using couplant, and acoustic emission probe is 6-12, the data line warp of acoustic emission probe Fluid-tight transmission hole 19 exports, and connect with Acquisition Instrument, and the gap setting between pressure-resistant cavity 1 and coal petrography sample 7 has micro- electricity Inductive pole piece 18.In the present embodiment, electrode tip holder is electric charge induction electrode tip holder, there is copper pole bar in electrode seat, and pole bar inside cavity connects Micro- electric induction pole piece 18 is connect, pole bar cavity is outer to be connected with shielding line, is mainly used for transmitting micro- electricity that micro- electric induction pole piece 18 generates Signal guarantees that cavity internal pressure is stablized again simultaneously;Micro- electric induction pole piece 18 is the micro- electric induction pole piece of nickel alloy, is made of nickel alloy Round sheet metal component monitor the micro- electrical anomaly generated in 7 destructive process of coal petrography sample using electric charge induction principle, it is micro- Electrical anomaly causes micro- electric induction pole piece 18 to generate charge inducing;Acoustic emission probe acquisition signal through fluid-tight transmission hole 19 with External world's sealing connection, corresponding signal is transmitted to signal preamplifier, Acquisition Instrument and computer carry out signal storage with it is subsequent Processing.
It includes the first external air source, pressure regulator valve, pressure gauge and flowmeter that hole clearance flow, which presses system, and pressure gauge is by pipeline and adjusts Pressure valve connection, while pressure regulator valve is connect by pipeline with the first external air source, in the present embodiment, pressure gauge is high accuracy number pressure Power table, external air source provide hole clearance flow and calm the anger body, control pressure size using pressure regulator valve and are shown by high-accuracy digital pressure gauge, The fluid-tight transmission hole 19 of ring flange 3 imports the hole clearance flow pressure of outside application, confining pressure in pressure-resistant cavity 1, while also conduct Wire guide is by inside the incoming pressure-resistant cavity 1 of extraneous power supply, and seaming chuck 8 is provided with hole clearance flow indentation mouth, and clearance flow indentation mouth in hole passes through Pipeline is connect with a fluid-tight transmission hole 19 close to one end of pressure-resistant cavity 1, while fluid-tight transmission hole 19 is another End is connect by pipeline with pressure gauge, and push-down head 9 is provided with hole clearance flow and extrudes mouth, and hole clearance flow extrudes mouth and passes through pipeline and another Fluid-tight transmission hole 19 is connected close to one end of pressure-resistant cavity 1, while the other end of fluid-tight transmission hole 19 passes through pipeline It is connect with flowmeter, loaded pore pressure in the process is monitored by flowmeter and is changed.Pipeline in the present embodiment is stainless steel Pipeline, hole clearance flow is pressed into mouth and hole clearance flow extrudes mouth as steel material, and through hole clearance flow is pressed into mouth, hole clearance flow extrudes mouth and pipeline To 7 application well clearance flow pressure of coal petrography sample.
Confining pressure is provided by the second extraneous gas source, and the second extraneous gas source is filled with by fluid-tight transmission hole 19 to the pressure resistance Cavity, and reach set definite value, air pressure maximum pressure 12MPa.
Hydraulic Power Transmission System includes that fuel tank 20, dynamic loading oil circuit 21, dead load oil circuit 22 and elevating ram add unloading oil circuit 23, it is mutually indepedent between each oil circuit, controlled by corresponding program electrification, using program realize electrified module control plus, Unloading test, fuel tank 20 are provided with electric-motor pump, and electric-motor pump is that dynamic loading oil circuit 21, dead load oil circuit 22 and elevating ram add unloading Oil circuit 23 provides power source, and dynamic loading oil circuit 21 includes two bladder type hydropneumatic accumulators, first pressure transmitter, solenoid valve and ratio Valve, proportioning valve are connect with dynamic load hydraulic cylinder 4, and the servo valve of dead load oil circuit 22 is connect with static load hydraulic cylinder 16, lifting oil Cylinder adds unloading oil circuit 23 to connect with elevating ram 14.In the present embodiment, dynamic loading oil circuit 21 provides axial dynamic for experimental rig Load, multiple energy storage equipments of connecting in dynamic loading oil circuit 21, is pumped into energy storage equipment for hydraulic oil by proportioning valve and reaches setting Value is filled with dynamic load hydraulic cylinder 4 using big flow electromagnetic valve control hydraulic oil and achievees the purpose that Impulsive load, dead load oil circuit 22 provide axial static mechanical loading for experimental rig, the servo valve controlled by program setting electrification, and utilize servo valve will Hydraulic oil is pumped into or pumps out static load hydraulic cylinder 16, and to achieve the purpose that test specimen Load-unload, elevating ram adds unloading oil circuit 23 In be provided with synchronous balance valve, control two elevating rams 14, make they lifting speed have significant synchronism.
The side of the second cylinder shape connector 13 is equipped with hollow out sliding slot, and static load compression bar 12 is vertical with tip bar to be connect, and tip bar is logical It crosses hollow out sliding slot to be slidably connected with grating sensor, in the present embodiment, tip bar is steel tip bar, and grating sensor is high-precision light Gate sensor monitors movement and the load condition of static load compression bar 12 by grating sensor.
Illustrate the first use process of the utility model below:
It tests the preparation stage: corresponding seaming chuck 8 and push-down head 9 being selected according to test 7 shape of coal petrography sample first, by coal 7 both ends of rock sample are fixed on seaming chuck 8 and push-down head 9 with adhesive tape respectively and are wrapped using thermoplastic set, and push-down head 9 is disposed In on static load compression bar 12, the steel hole clearance flow that stainless steel tubing one end is connected to seaming chuck is pressed into mouth respectively, and pipeline is existed Two circle of winding prevents the length of pipeline in loading procedure to be not enough broken around sample, after the other end is connected in the stream of lower flange On the closed transmission hole 19 of body, which connects pressure gauge, pressure maintaining valve, gas source far from one end of pressure-resistant cavity 1 Or water pressure source, the one end for choosing another stainless steel tubing are connected to the hole clearance flow on push-down head and extrude mouth and equally by stainless steel The other end is connected in another fluid-tight transmission hole 19 of ring flange, the fluid-tight transmission hole around two circle of sample winding by pipeline 19 one end far from pressure-resistant cavity 1 connect flowmeter, and by the acoustic emission probe of requirement of experiment selection respective numbers, sound emission is visited Head is fixed on coal body surface using coupling glue, arranges by Acoustic Emission location monitoring method, acoustic emission probe data line is passed through Acquisition Instrumen device is drawn and connected to fluid-tight transmission hole 19 on ring flange, while electrode tip holder 11 being connected and is acquired Instrument debugs each signal, opening program, and starting elevating ram, which adds unloading oil circuit 23 to control the decline of elevating ram 14, makes pressure-resistant cavity 1 With the closure of ring flange 3 and the tight bolt in school, starting dead load oil circuit 22 applies initial preload to test specimen using static load hydraulic cylinder 16 Lotus then applies hole to coal petrography sample 7 via fluid-tight transmission hole 19 to inside cavity gas injection confining pressure to target value Stream pressure ring border is stable to pressure and fluid is kept to be filled with, and high-speed camera is set up in outside a pressure-resistant form 10, by light source It is set up in outside another pressure-resistant form 10.
Experimental stage: strain gauge 15 is reset, and sets axial load path, and corresponding loading speed is to setting shaft Pressure, while sound emission acquisition system, charge monitoring system reset adjustment relevant parameter, each equipment adjusts rear cracking pressure simultaneously Each parameter variation of machine, Fluid pressure monitoring device, video camera, sound emission acquisition system, charge monitoring system acquisition, setting impact Rate of loading opens 21 accumulation of energy of dynamic loading oil circuit, when accumulation of energy reaches rated operation, opens top dynamic load hydraulic cylinder 4 to coal Rock sample 7 applies dynamics load impacting until test coal petrography sample 7, which loses bearing capacity, stops acquisition, storage test result.
Test post-processing: after each parameter storage, pore fluid pressure is first shed, then sheds confining pressure and axial direction respectively Pressure opens elevating ram 14 and opens pressure-resistant cavity 1, takes out test coal petrography sample 7.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model Within the scope of shield.

Claims (8)

1. coal seam containing gas rupture process many reference amounts experimental rig under a kind of static-dynamic coupling, which is characterized in that including pressure resistance Cavity, hole clearance flow pressure system, confining pressure and Hydraulic Power Transmission System;
Seaming chuck and push-down head are provided in the pressure resistance cavity, setting coal petrography tries among the seaming chuck and the push-down head Sample, it is described pressure resistance cavity top be equipped with first opening, it is described first opening is connect with blind flange, the top of the blind flange and The bottom of the first cylinder shape connector connects, and the top of the first cylinder shape connector and the shell of dynamic load hydraulic cylinder connect It connects, dynamic load compression bar is equipped in the first cylinder shape connector, one end of the dynamic load compression bar passes through blind flange and seaming chuck connects It connects, the other end passes through the first cylinder shape connector and connect with the piston coaxial of dynamic load hydraulic cylinder, the lower part of the pressure resistance cavity Equipped with the second opening, second opening is connect with ring flange, and the ring flange is equipped with multiple fluid-tight transmission holes, the method Blue pan bottom is connect with the top of the second cylinder shape connector, the bottom of the second cylinder shape connector and static load hydraulic cylinder The top of shell connects, and the bottom of the static load hydraulic cylinder shell is fixedly arranged on pedestal, in the second cylinder shape connector Equipped with static load compression bar, one end of the static load compression bar passes through ring flange and connect with the push-down head, the other end and strain gauge Top it is coaxially connected, the bottom of the strain gauge is connect with the piston of static load hydraulic cylinder, the pressure resistance cavity lower part Two sides connect respectively with the top of an elevating ram, the bottom of the elevating ram is fixedly arranged on the pedestal, described resistance to Circumferentially arranged in the middle part of pressure cavity to have multiple pressure-resistant forms and multiple electrodes seat, the fixed acoustic emission of coal petrography specimen surface is visited The data line of head, the acoustic emission probe is exported through the fluid-tight transmission hole, and is connect with Acquisition Instrument, the pressure resistance cavity Gap setting between the coal petrography sample has micro- electric induction pole piece;
The hole clearance flow pressure system includes the first external air source, pressure regulator valve, pressure gauge and flowmeter, and the pressure gauge passes through pipeline It is connect with the pressure regulator valve, while the pressure regulator valve is connect by pipeline with first external air source, the seaming chuck setting There is hole clearance flow to be pressed into mouth, the hole clearance flow indentation mouth is by pipeline and a fluid-tight transmission hole close to one end of pressure-resistant cavity Connection, while the other end of the fluid-tight transmission hole is connect by pipeline with the pressure gauge, the push-down head is provided with Hole clearance flow extrudes mouth, and the hole clearance flow extrudes mouth by pipeline and another fluid-tight transmission hole close to the pressure-resistant cavity One end connection, while the other end of the fluid-tight transmission hole is connect by pipeline with the flowmeter;
The confining pressure is provided by the second extraneous gas source, and the described second extraneous gas source is filled with by fluid-tight transmission hole to described resistance to Press cavity;
The Hydraulic Power Transmission System includes that fuel tank, dynamic loading oil circuit, dead load oil circuit and elevating ram add unloading oil circuit, the oil Case is provided with electric-motor pump, and the electric-motor pump adds unloading oil circuit to provide for the dynamic loading oil circuit, dead load oil circuit and elevating ram Power source, the dynamic loading oil circuit include two bladder type hydropneumatic accumulators, first pressure transmitter, solenoid valve and proportioning valve, the ratio Example valve is connect with dynamic load hydraulic cylinder, and the servo valve of the dead load oil circuit is connect with the static load hydraulic cylinder, the lifting Oil cylinder adds unloading oil circuit to connect with the elevating ram.
2. coal seam containing gas rupture process many reference amounts experimental rig under static-dynamic coupling according to claim 1, special Sign is, is enclosed with thermoplastic set outside the coal petrography sample.
3. coal seam containing gas rupture process many reference amounts experimental rig under static-dynamic coupling according to claim 1, special Sign is that the gap between the pressure resistance cavity and the ring flange is equipped with by rubber seal rings for seal, the ring flange Threaded hole, the ring flange are threadedly coupled with the pressure-resistant cavity.
4. coal seam containing gas rupture process many reference amounts experimental rig under static-dynamic coupling according to claim 1, special Sign is that the first circular groove is arranged in one end that the seaming chuck is connect with the dynamic load compression bar, and the dynamic load compression bar is plugged into In first circular groove, the second circular groove is arranged in one end that the static load compression bar is connect with the push-down head, under described Pressure head is plugged into second circular groove.
5. coal seam containing gas rupture process many reference amounts experimental rig under static-dynamic coupling according to claim 1, special Sign is, the section of one end that the seaming chuck and the push-down head are connect with the coal petrography sample respectively be simultaneously it is rectangular or It is round.
6. coal seam containing gas rupture process many reference amounts experimental rig under static-dynamic coupling according to claim 1, special Sign is that the side of the second cylinder shape connector is equipped with hollow out sliding slot, and the static load compression bar is vertical with tip bar to be connect, described Tip bar is slidably connected by the hollow out sliding slot with grating sensor.
7. coal seam containing gas rupture process many reference amounts experimental rig under static-dynamic coupling according to claim 1, special Sign is that the pressure resistance form is 2, and the electrode tip holder is 4.
8. coal seam containing gas rupture process many reference amounts experimental rig under static-dynamic coupling according to claim 1, special Sign is that the acoustic emission probe is 6-12.
CN201821002136.6U 2018-06-27 2018-06-27 Coal seam containing gas rupture process many reference amounts experimental rig under static-dynamic coupling Active CN208547549U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110514525A (en) * 2019-08-29 2019-11-29 江苏神马电力股份有限公司 A kind of interior pressure comparative test device
CN113188919A (en) * 2021-04-20 2021-07-30 山东大学 Single-power-source high-low pressure self-adaptive high-precision dynamic and static loading test system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110514525A (en) * 2019-08-29 2019-11-29 江苏神马电力股份有限公司 A kind of interior pressure comparative test device
CN113188919A (en) * 2021-04-20 2021-07-30 山东大学 Single-power-source high-low pressure self-adaptive high-precision dynamic and static loading test system

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