CN107727508A - A kind of coal petrography multi- scenarios method monitoring test device - Google Patents

A kind of coal petrography multi- scenarios method monitoring test device Download PDF

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Publication number
CN107727508A
CN107727508A CN201711120011.3A CN201711120011A CN107727508A CN 107727508 A CN107727508 A CN 107727508A CN 201711120011 A CN201711120011 A CN 201711120011A CN 107727508 A CN107727508 A CN 107727508A
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China
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pressure
hole
sealing flange
application system
electric charge
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CN107727508B (en
Inventor
肖晓春
丁鑫
吴迪
潘山
潘一山
王磊
樊玉峰
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Liaoning Technical University
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Liaoning Technical University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/18Performing tests at high or low temperatures
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02Details
    • G01N3/06Special adaptations of indicating or recording means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02Details
    • G01N3/06Special adaptations of indicating or recording means
    • G01N3/066Special adaptations of indicating or recording means with electrical indicating or recording means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02Details
    • G01N3/06Special adaptations of indicating or recording means
    • G01N3/068Special adaptations of indicating or recording means with optical indicating or recording means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014Type of force applied
    • G01N2203/0016Tensile or compressive
    • G01N2203/0019Compressive
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003Generation of the force
    • G01N2203/0042Pneumatic or hydraulic means
    • G01N2203/0048Hydraulic means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058Kind of property studied
    • G01N2203/0069Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0075Strain-stress relations or elastic constants
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/022Environment of the test
    • G01N2203/0222Temperature
    • G01N2203/0226High temperature; Heating means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/022Environment of the test
    • G01N2203/023Pressure
    • G01N2203/0232High pressure
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/06Indicating or recording means; Sensing means
    • G01N2203/0617Electrical or magnetic indicating, recording or sensing means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/06Indicating or recording means; Sensing means
    • G01N2203/0641Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/06Indicating or recording means; Sensing means
    • G01N2203/0658Indicating or recording means; Sensing means using acoustic or ultrasonic detectors
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/06Indicating or recording means; Sensing means
    • G01N2203/067Parameter measured for estimating the property
    • G01N2203/0682Spatial dimension, e.g. length, area, angle

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

Coal petrography multi- scenarios method monitoring test device, belongs to mining technique field.The coal petrography multi- scenarios method monitoring test device includes base, experiment cavity, axial compressive force application system, confined pressure application system, hole stream pressure simulation system, temperature application system, electric charge acquisition system, acoustic emission signal acquisition system, strain acquisition system and equipment data acquisition analyzing;Experiment cavity includes the pressure-resistant chamber of steel and sealing flange, and drive link is provided among sealing flange, steel is pressure-resistant chamber with the confined space that sealing flange is formed is interior is provided with seaming chuck and push-down head;The first hole stream that hole stream pressure simulation system includes being arranged on seaming chuck presses mouth, the second hole stream being arranged on push-down head pressure mouth, first-class pressure transmission hole and second the pressure transmission hole being arranged on sealing flange, flowmeter and stream pressure application system;Temperature application system includes being wrapped in the automatically controlled heating tape on thermoplastic set surface;Axial compressive force application system includes axial hydraulic oil cylinder and pressure sensor.

Description

A kind of coal petrography multi- scenarios method monitoring test device
Technical field
The present invention relates to mining technique field, more particularly to a kind of coal petrography multi- scenarios method monitoring test device.
Background technology
The long-term mechanical behavior of coal, rock is the important research direction of rock mechanics field research, while is also an engineering Hot issue.Coal industry in recent years formally enters the deep mining stage, and deep coal and rock is not only acted on by high-ground stress, The coupling of hyperosmosis and High-geotemperature is also suffered from simultaneously, therefore mining engineering activity changes the stability of the stress of primary rock Problem just particularly highlights, and then induces bump and coal and gas prominent accident, therefore to high-ground stress-hyperosmosis-height The long-term mechanical behavior of coal and rock under ground temperature coupling conducts a research particularly important, and being advantageous to that more scientific understanding deep is high should Mechanism is bred in the catastrophe of coal and rock under power, Thief zone pressure and High-geotemperature environment, more reasonably proposes many reference amounts monitoring side Method simultaneously establishes corresponding coal body Instability of Rock Body catastrophe judgement and Prevention Technique, to realizing that it is important that deep safe coal exploitation has Scientific meaning and construction value.
At present on coal and rock three-axis force scholarship and moral conduct be experimental rig it is relatively fewer, particularly can simultaneously by hole stream press and temperature It is more rare to spend the experimental rig for the long term strength test that the two influence factors carry out coal body, and studies deep coal body rock mass punching Press with hitting and breed genesis mechanism and not only need theoretically to study, while also need to carry out corresponding experimental study, therefore develop A kind of mechanical behavior for obtaining coal and rock under the effect of stress field, seepage field and temperature field multi- scenarios method, and prison can be realized The experimental rig for surveying caused physical signalling in its rupture process is very necessary.
The content of the invention
The invention provides a kind of coal petrography multi- scenarios method monitoring test device, the coal petrography multi- scenarios method monitoring test device Experiment cavity and axial compressive force application system, confined pressure application system, hole stream pressing mold including base, on base intend system System, temperature application system, electric charge acquisition system, acoustic emission signal acquisition system, strain acquisition system and data collection and analysis dress Put;
Experiment cavity includes the pressure-resistant chamber of steel and the sealing flange installed in the pressure-resistant bottom of chamber portion of steel, in sealing flange Between drive link is installed, be provided with seaming chuck and push-down head in the confined space that steel is pressure-resistant chamber is formed with sealing flange, push Head is connected with drive link, and one end of sample is fixed on push-down head, and seaming chuck is fixed on the other end of sample, intracavitary that steel is pressure-resistant Provided with seaming chuck spacing hole, the outer surface of sample is enclosed with thermoplastic set;
The first hole stream pressure mouth that hole stream pressure simulation system includes being arranged in seaming chuck side wall, it is arranged on and pushes rostral On wall the second hole stream pressure mouth, be arranged on the sealing flange first-class pressure transmission hole and second pressure transmission hole, Flowmeter and stream pressure application system, the first hole stream pressure mouth extend to seaming chuck close to the end face of sample in seaming chuck, and second Hole stream pressure mouth extends to push-down head close to the end face of sample, the first hole stream pressure mouth and first-class pressure transmission hole in push-down head Connection, first-class pressure transmission hole are connected with ambient pressure or hydraulic pressure application system, and the second hole stream pressure mouth transmits with second pressure Hole is connected, and second pressure transmission hole is connected with flowmeter;
Confined pressure simulation system connects with the experiment cavity and can apply oil pressure or air pressure into the test cavity body;
Temperature application system includes being wrapped in the automatically controlled heating tape on the thermoplastic set surface, is also set on the sealing flange There is signal string holes, the wire of automatically controlled heating tape is connected through signal string holes with the equipment data acquisition analyzing;
Electric charge acquisition system includes multiple electric charge probe mounting holes, the electric charge spy being arranged in the pressure-resistant chamber side wall of the steel Head and electrode slice, one electric charge probe of the interior installation of each electric charge probe mounting holes, each electric charge probe one electrode slice of connection are electric Between the sample and the pressure-resistant cavity wall of steel, electric charge probe is connected pole piece with the equipment data acquisition analyzing;
Acoustic emission signal acquisition system includes being fixed on the acoustic emission probe of the thermoplastic set outer surface, acoustic emission probe Signal wire is connected through the signal string holes with the equipment data acquisition analyzing;
Strain acquisition system includes the Axial extensometer and ring extensometer for being fixed on the thermoplastic set outer surface, axially draws The signal wire for stretching meter and annular extensometer is connected through the signal string holes with the equipment data acquisition analyzing;
Axial compressive force application system includes axial hydraulic oil cylinder and pressure sensor, and axial hydraulic oil cylinder is fixed on the bottom On seat, axial hydraulic oil cylinder is connected with pressure sensor, and pressure sensor is connected with the drive link, pressure sensor with it is described Equipment data acquisition analyzing connects.
The pressure-resistant chamber of steel includes covering on cavity body and cavity;
The multiple electric charge probe mounting holes are arranged in the side wall of the cavity body, and the sealing flange is arranged on The bottom of the cavity body, the bottom of the cavity body are additionally provided with adpting flange, multiple liftings are fixed with the base Oil cylinder, multiple elevating rams are connected with the adpting flange, and the cavity body is provided with mounting hole, are covered to be located on cavity and are being pacified Fill in hole, the seaming chuck spacing hole is arranged on the cavity on lid.
The bottom of the sealing flange is connected by bolt with cast steel cylinder, and the bottom of cast steel cylinder passes through bolt and institute State the cage connection of axial hydraulic oil cylinder, the shell of the axial hydraulic oil cylinder is fixed on the base, the drive link and The pressure sensor is located in the cast steel cylinder.
The first hole stream pressure mouth is connected with the first-class pressure transmission hole by stainless steel tube, the second hole stream Pressure mouth is connected with second pressure transmission hole by stainless steel tube.
The sealing flange is ladder plate, and the less part of ladder plate diameter is located in the cavity body, ladder plate The part being relatively large in diameter and the adpting flange of cavity body are located at Sealing Method by screw connection, one end of first-class pressure transmission hole On the end face of blue disk smaller-diameter portion, and extend in sealing flange the side wall of sealing flange larger diameter portion On, one end of second pressure transmission hole is located on the end face of sealing flange smaller-diameter portion, and in sealing flange Extend in the side wall of sealing flange larger diameter portion.
The cross section of the seaming chuck and the push-down head is rectangle or circle.
Coal petrography multi- scenarios method monitoring test device in the present invention, by the continual and steady application confined pressure of sample, axial direction Pressure, hole stream pressure and sample is heated, can simulate be in for a long time in recovery process high-ground stress, hyperosmosis with And the stressing conditions of the coal and rock under High-geotemperature coupling, and the monitoring test device can gather the whole stand under load mistake of sample It is caused respectively to strain signal, acoustic emission signal and electric signal in journey, sample long-term evolution can be obtained according to each signal The temporal-spatial evolution rule of axially and radially strain, the acoustic emission signal in sample destructive process and charge signal in destructive process Rule, the mechanical behavior for the coal and rock for being more beneficial for establishing in actual recovery process by multi- scenarios method effect develop and unstability catastrophe Mechanism of action, disclose coal and rock dynamic disaster origin mechanism, for coal and rock dynamic disaster prevent and treat relatively reliable experiment is provided Basis, corresponding coal and rock unstability catastrophe judgement and Prevention Technique are established according to experimental basis.
Brief description of the drawings
Fig. 1 is the front view of coal petrography multi- scenarios method monitoring test device provided by the invention;
Fig. 2 is the sectional view of the cavity body provided by the invention for being mounted with electric charge probe;
Fig. 3 is the sectional view of sealing flange provided by the invention;
Fig. 4 is the top view of sealing flange provided by the invention.
Wherein,
1 base, 2 steels are pressure-resistant chamber, 3 sealing flanges, 4 drive links, 5 seaming chucks, 6 push-down heads, 7 samples, 8 seaming chucks limit Position hole, 9 cavity bodies, is covered on 10 cavitys, 11 adpting flanges, 12 elevating rams, 13 axial hydraulic oil cylinders, 14 pressure sensors, 15 cast steel cylinders, the shell of 16 axial hydraulic oil cylinders, 17 chute holes, 18 confined pressure transmission holes, 19 air bleeding valves, 20 first hole stream pressures Mouthful, 21 second hole streams pressure mouth, 22 first-class pressure transmission holes, 23 seconds pressure transmission hole, 24 signal string holes, 25 electric charges probe peace Hole is filled, 26 electric charges are popped one's head in, 27 electrode slices, the screw hole on 29 sealing flanges.
Embodiment
In order to study mechanical behavior of the coal and rock for a long time under high-ground stress, hyperosmosis and High-geotemperature coupling, As shown in Figures 1 to 4, the invention provides a kind of coal petrography multi- scenarios method monitoring test device, coal petrography multi- scenarios method monitoring examination Experiment device includes base 1, the experiment cavity on base 1 and axial compressive force application system, confined pressure application system, hole stream Pressure simulation system, temperature application system, electric charge acquisition system, acoustic emission signal acquisition system, strain acquisition system and data are adopted Set analysis device;
Experiment cavity includes the pressure-resistant chamber 2 of steel and the sealing flange 3 installed in the pressure-resistant bottom of chamber 2 of steel, sealing flange Drive link 4 is installed among disk 3, be provided with the confined space that steel is pressure-resistant chamber 2 is formed with sealing flange 3 seaming chuck 5 and under Pressure head 6, push-down head 6 are connected with drive link 4, and one end of sample 7 is fixed on push-down head 6, and seaming chuck 5 is fixed on the another of sample 7 One end, seaming chuck spacing hole 8 is provided with steel is pressure-resistant chamber 2, the outer surface of sample 7 is enclosed with thermoplastic set;
Steel is pressure-resistant, and chamber 2 includes lid 10 on cavity body 9 and cavity;
Sealing flange 3 is arranged on the bottom of cavity body 9, and the bottom of cavity body 9 is additionally provided with adpting flange 11, base Multiple elevating rams 12 are fixed with 1, multiple elevating rams 12 are connected with adpting flange 11, and cavity body 9 is provided with mounting hole, Lid 10 is located in mounting hole on cavity, and seaming chuck spacing hole 8 is arranged on cavity on lid 10.
Axial compressive force application system includes axial hydraulic oil cylinder 13 and pressure sensor 14, and axial hydraulic oil cylinder 13 is fixed on On base 1, axial hydraulic oil cylinder 13 is connected with pressure sensor 14, and pressure sensor 14 is connected with drive link 4, pressure sensor 14 are connected with equipment data acquisition analyzing;
When axial hydraulic oil cylinder 13 works, axial hydraulic oil cylinder 13 promotes pressure sensor 14 to move upwards so that pressure Sensor 14 promotes drive link 4 to move upwards, so promote push-down head 6, sample 7 and seaming chuck 5 together in test cavity body to Upper motion, when seaming chuck 5 is stuck in seaming chuck spacing hole 8, seaming chuck 5 stops moving upwards so that sample 7 is by axial direction Extruding force, pressure sensor 14 can detect the size for the axial compressive force that axial hydraulic oil cylinder 13 applies to sample 7, in the present invention In, the cross section of seaming chuck 5 and push-down head 6 is rectangle or circle, can select cross section not according to various sizes of sample 7 Same seaming chuck 5 and push-down head 6, seaming chuck 5 and push-down head 6 can select high strength steel making to form, the energy of pressure sensor 14 Enough detection axial hydraulic sensor is applied to the magnitude of load of sample 7;
In the present invention, the bottom of sealing flange 3 is connected by bolt with cast steel cylinder 15, can be in sealing flange Screw hole 28 is set on 3, is connected sealing flange 3 with cast steel cylinder 15 through screw hole 28 and cast steel cylinder 15 by screw Get up, the bottom of cast steel cylinder 15 is connected by bolt with the shell 16 of axial hydraulic oil cylinder 13, outside axial hydraulic oil cylinder 13 Shell 16 is fixed on base 1, and drive link 4 and pressure sensor 14 are located in cast steel cylinder 15, can be in the side of cast steel cylinder 15 Wall is provided with chute hole 17, and grating displacement sensor is located at outside cast steel cylinder 15, and grating displacement sensor connects a connecting rod, And connecting rod is connected through chute hole 17 with drive link 4, grating displacement sensor is connected with equipment data acquisition analyzing, works as biography When lever 4 is moved upwards, connecting rod can be driven to move upwards, connecting rod is in the upward sliding of chute hole 17 and drives pattern displacement to pass Sensor slides and then detects that axial hydraulic oil cylinder 13 drives the change in displacement situation of drive link 4.
Confined pressure simulation system connects with experiment cavity and can apply oil pressure or air pressure into test cavity body;Confined pressure application system It can be external hydraulic station or external air source, gas pressure is provided to providing oil pressure in test cavity body so as to realize, wherein, can To set confined pressure transmission hole 18 on sealing flange 3, confined pressure transmission hole 18 will test cavity and be connected with the external world, extraneous confined pressure Application system applies oil pressure or air pressure into test cavity body by confined pressure transmission hole 18, and the quantity of confined pressure transmission hole 18 can root Rationally set according to actual conditions, for the sealing in more preferable guarantee test cavity, can be set on sealing flange 3 close Seal, sealing flange 3 is in close contact with cavity body 9, prevent confined pressure from leaking, lid 10 connects with cavity body 9 on cavity Tactile cylindrical setting sealing ring, meanwhile, multiple sealing rings are also provided between drive link 4 and sealing flange 3, in push-down head 6 Multiple sealing rings are also provided between drive link 4, prevent confined pressure from leaking;The present invention can set air bleeding valve by lid 10 on cavity 19, when confined pressure application system apply into test cavity body for oil pressure when, open air bleeding valve 19 discharge test cavity body in air.
Axial compressive force application system and confined pressure simulation system in the present invention are used to simulate to the pressure that sample 7 applies jointly The high-ground stress that coal petrography is subject in actual recovery process;
The first hole stream pressure mouth 20 that hole stream pressure simulation system includes being arranged in the side wall of seaming chuck 5, it is arranged on and pushes The second hole stream in first 6 side wall presses mouth 21, first-class the pressure transmission hole 22 and second being arranged on sealing flange 3 pressure to pass Defeated hole 23, flowmeter and stream pressure application system, the first hole stream pressure mouth 20 extend to seaming chuck 5 close to sample 7 in seaming chuck 5 End face, the second hole stream pressure mouth 21 extends to push-down head 6 close to the end face of sample 7 in push-down head 6, the first hole stream pressure mouth 20 are connected with first-class pressure transmission hole 22, and first-class pressure transmission hole 22 is connected with ambient pressure or hydraulic pressure application system, the second hole Clearance flow presses mouth 21 to be connected with second pressure transmission hole 23, and second pressure transmission hole 23 is connected with flowmeter, wherein, the first hole stream Pressure mouth 20 can be connected with first-class pressure transmission hole 22 by stainless steel tube, the second hole stream pressure mouth 21 and second pressure transmission hole 23 can be connected by stainless steel tube;
Mesopore clearance flow pressing mold of the present invention intends the application well clearance flow pressure of sample 7 that system can be pointed in test cavity body, is used for The air pressure or hydraulic pressure that the hyperosmosis that simulation deep coal and rock is subject to, ambient pressure or hydraulic pressure application system provide pass through first Stream pressure transmission hole 22, stainless steel tube and the first hole stream pressure mouth 20 are applied to sample 7, and flowmeter, which can be measured, is applied to sample 7 Gas or water flow.
In the present invention, sealing flange 3 is designed to a ladder plate, the less part of diameter be located in cavity body 9 and It is engaged with the internal diameter of cavity body 9, the adpting flange 11 of the part being relatively large in diameter and cavity body 9 is by screw connection, and One end of one stream pressure transmission hole 22 is located on the end face of the smaller-diameter portion of sealing flange 3, and prolongs in sealing flange 3 In the side wall for extending the part that sealing flange 3 is relatively large in diameter, similarly, one end of second pressure transmission hole 23 is located at sealing flange On the end face of the smaller-diameter portion of disk 3, and extend in sealing flange 3 part that sealing flange 3 is relatively large in diameter In side wall, in this way, realizing that first-class pressure transmission hole 22 presses mouth 20 to connect in test cavity body by stainless steel tube and the first hole stream It is logical, and connected in vitro with stream pressure application system in sample chamber, and realize that second pressure transmission hole 23 passes through in test cavity body Stainless steel tube connects with the second hole stream pressure mouth 21, and is connected in vitro with flowmeter in sample chamber.
Temperature application system includes being wrapped in the automatically controlled heating tape on thermoplastic set surface, and signal is additionally provided with sealing flange 3 String holes 24, the wire of automatically controlled heating tape are connected through signal string holes 24 with equipment data acquisition analyzing, and automatically controlled heating tape can be right Sample 7 carries out being heated to required temperature, the High-geotemperature being subject to for simulating actual recovery process medium and deep coal and rock;
Axial compressive force application system and confined pressure application system in the present invention simulate the highland that deep coal and rock is subject to should Power, hole stream pressing mold intend the hyperosmosis that system simulation deep coal and rock is subject to, and temperature application system simulates deep coal petrography The High-geotemperature that body is subject to, therefore simulate deep coal and rock and exerted oneself in the effect of stress field, seepage field and temperature field multi- scenarios method Learn Behavioral change.
Electric charge acquisition system includes multiple electric charges probe peace in the side wall for the cavity body 9 for being arranged on the pressure-resistant chamber 2 of steel Hole 25, electric charge probe 26 and electrode slice 27 are filled, an electric charge probe 26, each electric charge are installed in each electric charge probe mounting holes 25 One electrode slice 27 of connection of probe 26, electrode slice 27 are located between sample 7 and the pressure-resistant inwall of chamber 2 of steel, electric charge probe 26 and number Connected according to acquisition and analysis device;
Under THM coupling effect, sample 7 can be destroyed, and micro- electric charge, micro- electric charge can be produced during sample 7 destroys Electrode slice 27 can be made powered, electric charge probe 26 gathers the potential change situation of connected electrode slice 27 and is sent to data and adopts Set analysis device, electrode slice 27 can select electrode slice 27 of the material for nickel cobalt (alloy), in order to prevent electric charge probe 26 and cavity Interconnected between body 9 and influence potential change, high-strength insulating can be scribbled between cavity body 9 and electric charge probe 26 Gel;Preferably, four electric charge probe mounting holes 25, four edges of electric charge probe mounting holes 25 are set in the side wall of cavity body 9 The circumference for cavity body 9 is uniformly distributed, and an electric charge probe 26 is respectively mounted in each electric charge probe mounting holes 25.
Acoustic emission signal acquisition system includes being fixed on the acoustic emission probe of thermoplastic set outer surface, the signal of acoustic emission probe Line is connected through signal string holes 24 with equipment data acquisition analyzing;
Acoustic emission signal acquisition system includes being fixed on the acoustic emission probe of thermoplastic set outer surface, the signal of acoustic emission probe Line is connected through signal string holes 24 with equipment data acquisition analyzing;Acoustic emission probe can be fixed on thermoplastic set using glue is coupled Outer surface, in the presence of stress field, seepage field and temperature field, sample 7 can be destroyed, and sample 7 can deform before destroying, Crack etc. is produced, sample 7 can discharge hyperfrequency stress wave pulse signal in this process, and acoustic emission signal acquisition system is used for The pulse signal is gathered, wherein, acoustic emission probe can be arranged in thermoplastic set outer surface, sound according to Acoustic Emission location detection method The quantity of transmitting probe is 6~12.
Strain acquisition system includes the Axial extensometer and ring extensometer for being fixed on thermoplastic set outer surface, Axial extensometer It is connected with the signal wire of annular extensometer through signal string holes 24 with equipment data acquisition analyzing.The quantity of signal string holes 24 can be with Rationally set according to actual conditions, because the thermoplastic hard-pressed bale that is locked is rolled in the surface of sample 7, therefore, sample 7 is in axial compressive force and encloses When axial direction and the strain of ring occurring in the presence of pressure, thermoplastic set can deform simultaneously with sample 7, Axial extensometer and ring Axial strain and radial strain of the sample 7 under stress are detected respectively to extensometer, in the present invention, to signal string holes 24 Corresponding sealing is carried out, ensures that confined pressure will not while each wire and signal wire can stretch out the external world by signal string holes 24 Revealed by signal string holes 24.
Equipment data acquisition analyzing record and storage sample 7 are under THM coupling effect in the present invention, whole stand under load process In it is caused respectively can include multiple Acquisition Instruments to strain signal, acoustic emission signal and electric signal, equipment data acquisition analyzing, often The corresponding computer of individual Acquisition Instrument, multiple Acquisition Instruments gather the acoustic emission signal of acoustic emission probe, the electricity of electric charge probe 26 respectively Lotus signal, the signal of Axial extensometer and ring extensometer, the pressure signal and grating displacement sensor of pressure sensor 14 Displacement signal, the corresponding computer of each Acquisition Instrument, the signal received is stored and post-processed.
The application method of coal petrography multi- scenarios method monitoring test device in the present invention is as follows:
Illustrate the first use process of the present invention below in conjunction with the accompanying drawings:
It is circular or rectangle seaming chuck 5 and push-down head 6 first according to the size selection cross section of coal petrography sample 7, will One end of sample 7 is fixed on push-down head 6 with adhesive tape, seaming chuck 5 is fixed on to the other end of sample 7 with adhesive tape, and utilize heat Mould set wraps sample 7, and push-down head 6 is fixed on to the top of drive link 4, and Axial extensometer and ring extensometer are fixed on Thermoplastic covers outer surface, and acoustic emission probe is fixed on into thermoplastic set outer surface using glue is coupled, automatically controlled heating tape is wrapped in into heat Outside mould set, the wire of the signal wire of Axial extensometer and ring extensometer, the signal wire of acoustic emission probe, automatically controlled heating tape is worn The signal string holes 24 for crossing sealing flange 3 is connected with equipment data acquisition analyzing, and specifically, the signal wire of different device correspondingly connects Connect equipment data acquisition analyzing different Acquisition Instrument and computer;
Elevating ram 12 is opened, drives the pressure-resistant chamber 2 of steel to move downward and closes and be fixed by screw with sealing flange 3 Cavity body 9 and sealing flange 3, axial hydraulic oil cylinder 13 is opened, axial hydraulic oil cylinder 13 is moved upwards, while with dynamic pressure Force snesor 14 and drive link 4 move upwards, and when seaming chuck 5 is stuck in seaming chuck spacing hole 8, axial hydraulic oil cylinder 13 continues Motion upwards, axial compression power can be applied to sample 7, open confined pressure application system and hole stream pressure application system, control is automatically controlled Heating tape is heated to sample 7, wherein, confined pressure application system is according to experiment demand, if selection oil pressure is opened as confined pressure The air bleeding valve 19 of lid 10 on cavity, air unnecessary in test cavity body is excluded, is had a meeting, an audience, etc. well under one's control in high geostress field, the Thief zone simulated And under the coupling of high/low temperature intestines, acoustic emission signal acquisition system gathers work of the sample 7 in confined pressure and axial compressive force in real time The acoustic emission signal sent under, electric charge acquisition system gather caused electric signal, strain acquirement in the destructive process of sample 7 in real time System gathers the strain signal axially and radially that sample 7 occurs under stress state in real time, and equipment data acquisition analyzing is real-time Receive each signal and store result of the test, until sample 7 stops collection when losing bearing capacity;
After experiment, hole stream pressure is first shed, then sheds confined pressure and axial compressive force, stops heating sample 7, opens and lifts Oil-lifting jar 12 drives the pressure-resistant chamber 22 of steel to move upwards, takes out sample 7, and the form after being destroyed to coal petrography is observed and taken pictures.
Coal petrography multi- scenarios method monitoring test device in the present invention, by the continual and steady application confined pressure of sample 7, axial direction Pressure, hole stream are pressed and sample 7 are heated, and can be simulated and are in high-ground stress, hyperosmosis in recovery process for a long time And the stressing conditions of the coal and rock under High-geotemperature coupling, and the monitoring test device can gather sample 7 entirely by It is caused respectively to strain signal, acoustic emission signal and electric signal during load, it is long-term that sample 7 can be obtained according to each signal The space-time of axially and radially strain, the acoustic emission signal in the destructive process of sample 7 and charge signal in evolution destructive process is drilled Law, the mechanical behavior for the coal and rock for being more beneficial for establishing in actual recovery process by multi- scenarios method effect develops and unstability The mechanism of action of catastrophe, coal and rock dynamic disaster origin mechanism is disclosed, provided for the preventing and treating of coal and rock dynamic disaster relatively reliable Experimental basis, corresponding coal and rock unstability catastrophe judgement and Prevention Technique are established according to experimental basis.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.

Claims (6)

  1. A kind of 1. coal petrography multi- scenarios method monitoring test device, it is characterised in that the coal petrography multi- scenarios method monitoring test device bag Include base, the experiment cavity on base and axial compressive force application system, confined pressure application system, hole stream pressing mold plan system System, temperature application system, electric charge acquisition system, acoustic emission signal acquisition system, strain acquisition system and data collection and analysis dress Put;
    Experiment cavity includes the pressure-resistant chamber of steel and the sealing flange installed in the pressure-resistant bottom of chamber portion of steel, pacifies among sealing flange Equipped with drive link, be provided with seaming chuck and push-down head in the confined space that steel is pressure-resistant chamber is formed with sealing flange, push-down head and Drive link is connected, and one end of sample is fixed on push-down head, and seaming chuck is fixed on the other end of sample, and steel is pressure-resistant, and intracavitary is provided with Seaming chuck spacing hole, the outer surface of sample are enclosed with thermoplastic set;
    The first hole stream that hole stream pressure simulation system includes being arranged in seaming chuck side wall is pressed mouth, is arranged in push-down head side wall The second hole stream pressure mouth, be arranged on the sealing flange first-class pressure transmission hole and second pressure transmission hole, flow Meter and stream pressure application system, the first hole stream pressure mouth extend to seaming chuck close to the end face of sample, the second hole in seaming chuck Stream pressure mouth extends to push-down head in push-down head and connected close to the end face of sample, the first hole stream pressure mouth with first-class pressure transmission hole Logical, first-class pressure transmission hole is connected with ambient pressure or hydraulic pressure application system, the second hole stream pressure mouth and second pressure transmission hole Connection, second pressure transmission hole are connected with flowmeter;
    Confined pressure simulation system connects with the experiment cavity and can apply oil pressure or air pressure into the test cavity body;
    Temperature application system includes being wrapped in the automatically controlled heating tape on the thermoplastic set surface, and letter is additionally provided with the sealing flange Number string holes, the wire of automatically controlled heating tape are connected through signal string holes with the equipment data acquisition analyzing;
    Electric charge acquisition system include being arranged on multiple electric charge probe mounting holes in the pressure-resistant chamber side wall of the steel, electric charge probe and Electrode slice, one electric charge probe of the interior installation of each electric charge probe mounting holes, each electric charge probe one electrode slice of connection, electrode slice Between the sample and the pressure-resistant cavity wall of steel, electric charge probe is connected with the equipment data acquisition analyzing;
    Acoustic emission signal acquisition system includes being fixed on the acoustic emission probe of the thermoplastic set outer surface, the signal of acoustic emission probe Line is connected through the signal string holes with the equipment data acquisition analyzing;
    Strain acquisition system includes the Axial extensometer and ring extensometer for being fixed on the thermoplastic set outer surface, Axial extensometer It is connected with the signal wire of annular extensometer through the signal string holes with the equipment data acquisition analyzing;
    Axial compressive force application system includes axial hydraulic oil cylinder and pressure sensor, and axial hydraulic oil cylinder is fixed on the base On, axial hydraulic oil cylinder is connected with pressure sensor, and pressure sensor is connected with the drive link, pressure sensor and the number Connected according to acquisition and analysis device.
  2. 2. coal petrography multi- scenarios method monitoring test device according to claim 1, it is characterised in that the pressure-resistant chamber bag of steel Include and covered on cavity body and cavity;
    The multiple electric charge probe mounting holes are arranged in the side wall of the cavity body, and the sealing flange is arranged on described The bottom of cavity body, the bottom of the cavity body are additionally provided with adpting flange, multiple elevating rams are fixed with the base, Multiple elevating rams are connected with the adpting flange, and the cavity body is provided with mounting hole, and lid is located in mounting hole on cavity Interior, the seaming chuck spacing hole is arranged on the cavity on lid.
  3. 3. coal petrography multi- scenarios method monitoring test device according to claim 1, it is characterised in that the sealing flange Bottom is connected by bolt with cast steel cylinder, and the bottom of cast steel cylinder is connected by the shell of bolt and the axial hydraulic oil cylinder Connect, the shell of the axial hydraulic oil cylinder is fixed on the base, and the drive link and the pressure sensor are positioned at described In cast steel cylinder.
  4. 4. coal petrography multi- scenarios method monitoring test device according to claim 1, it is characterised in that the first hole stream pressure Mouth is connected with the first-class pressure transmission hole by stainless steel tube, the second hole stream pressure mouth and second pressure transmission hole Connected by stainless steel tube.
  5. 5. coal petrography multi- scenarios method monitoring test device according to claim 2, it is characterised in that the sealing flange is Ladder plate, the less part of ladder plate diameter are located in the cavity body, part and cavity body that ladder plate is relatively large in diameter Adpting flange by screw connection, one end of first-class pressure transmission hole is located at the end face of sealing flange smaller-diameter portion On, and extended in sealing flange in the side wall of sealing flange larger diameter portion, the one of second pressure transmission hole End on the end face of sealing flange smaller-diameter portion, and extend in sealing flange sealing flange diameter compared with In most side wall.
  6. 6. according to the coal petrography multi- scenarios method monitoring test device described in any one of claim 1 to 5 claim, its feature exists In the cross section of the seaming chuck and the push-down head is rectangle or circle.
CN201711120011.3A 2017-11-14 2017-11-14 Coal rock multi-field coupling monitoring test device Active CN107727508B (en)

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CN112557203A (en) * 2020-11-11 2021-03-26 核工业北京地质研究院 Hot hydraulic coupling triaxial test method for fractured rock
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CN109001053A (en) * 2018-06-13 2018-12-14 安徽工业大学 Coal petrography dynamic impulsion destroys test macro under a kind of confining pressure and damp and hot coupling condition
CN109001053B (en) * 2018-06-13 2021-01-12 安徽工业大学 Coal rock dynamic impact damage test system under confining pressure and damp-heat coupling condition
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CN108444848B (en) * 2018-06-27 2023-11-28 辽宁工程技术大学 Multi-parameter test device for gas-containing coal rock cracking process under dynamic-static coupling effect
CN110687140A (en) * 2019-11-14 2020-01-14 安徽理工大学 Triaxial loading seepage device for CT and implementation method thereof
CN110687140B (en) * 2019-11-14 2024-04-16 安徽理工大学 Triaxial loading seepage device for CT
CN112557203A (en) * 2020-11-11 2021-03-26 核工业北京地质研究院 Hot hydraulic coupling triaxial test method for fractured rock
CN112859946A (en) * 2021-01-15 2021-05-28 四川大学 Pressure overall control system for calibration platform and control method thereof

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