CN109001053A - Coal petrography dynamic impulsion destroys test macro under a kind of confining pressure and damp and hot coupling condition - Google Patents
Coal petrography dynamic impulsion destroys test macro under a kind of confining pressure and damp and hot coupling condition Download PDFInfo
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- CN109001053A CN109001053A CN201810607313.1A CN201810607313A CN109001053A CN 109001053 A CN109001053 A CN 109001053A CN 201810607313 A CN201810607313 A CN 201810607313A CN 109001053 A CN109001053 A CN 109001053A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/307—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated by a compressed or tensile-stressed spring; generated by pneumatic or hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
Abstract
The invention discloses coal petrography dynamic impulsions under a kind of confining pressure and damp and hot coupling condition to destroy test macro, is related to coal or rock dynamic failure test technical field, can be realized coal and rock dynamic impulsion under high confining pressure, high damp and hot and strong power disturbed conditions and loads.This system is made of impact loading device and damp and hot power coupling device, and impact loading device applies strong power disturbance, humidity, temperature and confining pressure condition needed for damp and hot power coupling device forms test to sample to coal and rock sample.During Impulsive load, micro rupture signal and surface fracture image information inside sample can be obtained in real time, for analyzing high confining pressure, the high damp and hot dynamic response feature with coal and rock under strong power disturbed conditions, having important theory significance and more practical value with control is predicted for Deep Underground Space dynamic disaster.
Description
Technical field
The present invention relates to coal or rock dynamic failure test technical fields, and in particular to coal under a kind of confining pressure and damp and hot coupling condition
Rock dynamic impulsion destroys test macro.
Background technique
As global economy is grown rapidly, the industries underground engineering scale such as national defence, traffic, water conservancy, mining industry and depth are quick
Increase, Deep Underground Space, which is utilized, is increasingly becoming various countries' priority research areas with exploitation of mineral resources.Currently, coal resources in China
Starting to extend to deep mostly, Deep Underground Space coal and rock is often in high confining pressure, high damp and hot and strong power bumpy weather,
The dynamic disasters such as rock burst, bump easily occur during development of deep part, seriously threaten human life and property safety.
Currently, people still lack foot to coal and rock dynamic response under high confining pressure, high damp and hot and strong power bumpy weather
Enough understanding, therefore, it is difficult to Deep Underground Space dynamic disaster is effectively predicted and is controlled.Develop a kind of confining pressure with it is damp and hot
Coal petrography dynamic impulsion destroys test macro under coupling condition, for analyzing coal and rock power under deep confining pressure and damp and hot coupling condition
Response characteristic is learned, Deep Underground Space dynamic disaster is predicted and is controlled with important theory significance and more practical value.
Currently, existing coal petrography dynamic impulsion, which destroys test macro, is mainly based upon split hopkinson press bar device reality
Existing, the confining pressure device in such system mostly uses greatly hydraulic power unit that oil or water are injected airtight chamber, will be pressed by seal rubber sleeve
Power acts on around sample, and this processing mode has the disadvantage that:
1. mechanism moment terminates, such as since the time of Hopkinson pressure bar test only can be completed in several ms
Using hydraulic way, hydraulic servo actuation overlong time, material when causing confining pressure to be difficult to synchronous load with shock loading, and testing
The moderate finite deformation of material will lead to the volume change of hydraulic oil in confining pressure device, so that confining pressure device is difficult to keep during the test
Pressure stabilizing.
2. it is micro- that inside of sample during impact failure can not be directly acquired since sample is packaged in seal rubber sleeve
Destruction signals and surface fracture image information hinder people to the full appreciation of coal and rock dynamic response feature.
3. existing coal petrography dynamic impulsion, which destroys test macro, can not simulate hygrothermal environment, it is even more impossible to for study confining pressure with
Coal and rock dynamic response under damp and hot coupling.
Summary of the invention
The technical issues of solution
The object of the present invention is to provide coal petrography dynamic impulsions under a kind of confining pressure and damp and hot coupling condition to destroy test macro, energy
It enough realizes that coal and rock dynamic impulsion destroys under confining pressure and damp and hot coupling condition, and during impact failure, can obtain in real time
It materialses internal micro rupture signal and surface fracture image information, it is true to reflect deep high confining pressure, high damp and hot disturbed with strong power
The dynamic response feature of Coal Under rock mass.
Technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs:
The present invention includes impact loading device and damp and hot power coupling device；The impact loading device and the damp and hot couple of force
It attaches together setting on same axis, the impact loading device is pneumatic control, the damp and hot external pressurization dress of power coupling device
It sets, dynamic monitor, sample, and the damp and hot power coupling device and the sample is installed in the damp and hot power coupling device
Directly contact.
Further, the impact loading device includes gas chamber, control valve, trip rod, incident bar, transmission bar；The punching
It hits control valve in loading device to be located in gas chamber pipeline for controlling the unlatching of gas chamber pipeline and closed state, trip rod, and hits
Bar, incident bar and transmission bar are on same axis.
Further, the wet Thermal-mechanical Coupling loading device includes incident rod set, incidence end chamber, transmission end chamber, thoroughly
Penetrate rod set；The successively sealing socket from inside to outside of the incident bar, the incident rod set and the incidence end chamber；The transmission
The successively sealing socket from inside to outside of bar, the transmission rod set and the transmission end chamber；The incident bar and the transmission bar it
Between be clamped with sample, the incidence end chamber and the transmission end chamber are bolted by normal direction, and the incidence end chamber
Rigid base is respectively and fixedly provided with below the transmission end chamber.
Further, the supercharging device includes hydraulic power unit, and the dynamic monitor includes pressure sensor, high pressure
Gas cylinder, acoustic emission sensor, electric resistor heating type coil pipe, temperature sensor, humidity sensor, sound emission Acquisition Instrument, dynamic data
Acquisition Instrument, industrial control computer and high-speed camera.
Further, the incident rod set and the transmission rod set whole body surface are respectively equipped with annular projection, described in two
Annular projection forms enclosure space with incidence end chamber, the transmission end chamber respectively；
The incidence end chamber in the enclosure space and oil inlet is provided on the wall surface of the transmission bar chamber.
The incidence end chamber includes 1 oil inlet, 1 air inlet and 1 pressure relief opening, oil inlet by pressure duct and
The hydraulic power unit connection, the air inlet are connect by pressure duct with the pressure sensor and the high pressure gas cylinder, institute
It states pressure sensor to connect with the dynamic data acquiring instrument, the pressure relief opening connects relief valve, when pressure exceeds safe threshold
The relief valve automatically turns on release when value.
The position of sample described in the incidence end chamber face is provided with transparent observing window, and the transparent observing window is adopted
It is closed with high strength glass, the transparent observing window peripheral hardware is equipped with the high-speed camera；The transmission end chamber includes 1
Oil inlet, oil inlet are connect by pressure duct with the hydraulic power unit.
Further, the incident rod set and incident bar is concentric passes through the incidence end chamber, and the incidence
The end face and sample contacts of rod set and the incident bar.The a plurality of wire channel of axially spaced 90 ° of distributions in the incidence rod set
A, wire channel a share 4, and wire channel a is contacted with the end face of the sample, and opposite with the sample in wire channel a
Endface be evenly distributed with the acoustic emission sensor.
Elastic buffer cushion block is arranged in the acoustic emission sensor bottom, and the acoustic emission sensor conducting wire passes through the elasticity
Cushion block is pierced by the incident bar rod set via the wire channel a, accesses the sound emission Acquisition Instrument.
Further, the transmission rod set and the transmission bar are concentric across the transmission end chamber, the transmission bar
End face and the sample contacts of the set with the transmission bar.It is axially disposed in the transmission rod set to have 1 fluid passage and 1
Wire channel b, one end of the fluid passage is contacted with the end face of the sample, the other end is connected with water flooding pump station.
The transmission rod set side end opposite with the sample is provided with the electric resistor heating type coil pipe, and described
The temperature sensor and the humidity sensor is distributed on rod set surface in transmission, and the electric resistor heating type coil pipe passes through conducting wire
It is logical that the conducting wire of the channel b access industrial control computer, the temperature sensor and the humidity sensor passes through the conducting wire
Road b accesses the dynamic data acquiring instrument.
Further, it is connected between the dynamic data acquiring instrument, sound emission Acquisition Instrument and high-speed camera by conducting wire,
The dynamic data acquiring instrument starts starting according to strain signal variation in incident bar and acquires and export Transistor-Transistor Logic level signal, sound hair
Start starting acquisition after penetrating Acquisition Instrument and high-speed camera reception Transistor-Transistor Logic level signal.
Beneficial effect
Using technical solution provided by the invention, compared with known publicly-owned technology, have as follows
The utility model has the advantages that
The present invention is by the way that confining pressure device to be changed to air pressure and directly acted on around sample by hydraulic, air pressure Impulsive load speed
Fastly, confined pressure steady is not only increased, barrier of the seal rubber sleeve to sample is more avoided, makes it possible to through sound emission and high speed
Photographic apparatus directly acquires inside micro rupture signal and surface fracture image information of the sample during impact failure, more fully
Reflect the dynamic response feature of coal and rock.On the other hand, the present invention provides impact under a kind of confining pressure and damp and hot coupling
The experimental method of load can simulate realistically high confining pressure locating for Deep Underground Space coal and rock, high damp and hot and strong power
Bumpy weather has important value with control mechanism for the prediction of research Deep Underground Space dynamic disaster, for research comprehensively
Coal and rock dynamic response provides important channel, horizontal with control technology for improving the prediction of Deep Underground Space dynamic disaster
With important theory significance and more practical value.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.It should be evident that the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the principle of the present invention schematic diagram；
Fig. 2 is schematic perspective view of the invention；
Fig. 3 is incident rod set schematic perspective view of the invention；
Fig. 4 is transmission rod set schematic perspective view of the invention；
Label in figure respectively represents: 1- gas chamber；2- control valve；3- trip rod；4- incident bar；5- incidence rod set；6- enters
Penetrate end chamber；7- transmission end chamber；8- transmits rod set；9- transmission bar；10- rigid base；11- sample；12- ring type seal；
13- normal direction bolt；14- radial bolts；15- annular projection；16- enclosure space；17- oil inlet；18- air inlet；19- pressure release
Mouthful；20a- wire channel；20b- wire channel b；21- fluid passage；22- hydraulic power unit；23- relief valve；24- pressure sensing
Device；25- high pressure gas cylinder；26- acoustic emission sensor；27- elastic buffer cushion block；28- electric resistor heating type coil pipe；29- water flooding pump station；
30- temperature sensor；31- humidity sensor；32- sound emission Acquisition Instrument；33- dynamic data acquiring instrument；34- industrial control computer；
35- transparent observing window；36- high-speed camera.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
The present invention will be further described with reference to the examples below.
Embodiment 1
In conjunction with Fig. 1-4: coal petrography dynamic impulsion destroys test macro under a kind of confining pressure and damp and hot coupling condition, including impact adds
It carries and sets and damp and hot power coupling device；The impact loading device and the damp and hot couple of force are attached together setting on same axis, are rushed
Hitting loading device is pneumatic control, and the external supercharging device of the damp and hot power coupling device, dynamic monitor, damp and hot couple of force attach together
It is installed with sample 11 in setting, and damp and hot power coupling device is directly contacted with sample 11.
The impact loading device includes gas chamber 1, control valve 2, trip rod 3, incident bar 4, transmission bar 9；The impact adds
Carry set middle control valve 2 for control 1 pipeline of gas chamber open and closed state, trip rod 3 be located in 1 pipeline of gas chamber, and shock
Bar 3, incident bar 4 and transmission bar 9 are on same axis.After control valve 2 opens gas chamber 1, high pressure gas is gone out from gas chamber 1, is pushed away
Dynamic 3 high-speed impact incident bar 4 of trip rod forms dynamic impact loads.
The wet Thermal-mechanical Coupling loading device includes incident rod set 5, incidence end chamber 6, transmission end chamber 7, transmission bar
Set 8；The successively sealing socket from inside to outside of the incident bar 4, the incident rod set 5 and the incidence end chamber 6；The transmission bar
9, the transmission rod set 8 and the transmission end chamber 7 successively sealing socket from inside to outside；The incident bar 4 and the transmission bar 9
Between be clamped with sample 11.
The incidence end chamber 6 is concentric with transmission end chamber 7 and is connect by normal direction bolt 13, the incidence end chamber
6 and the transmission end chamber 7 below be respectively and fixedly provided with rigid base 10.And in the contact surface of incidence end chamber 6 and transmission end chamber 7
Place is equipped with two ring type seals 12, and 12 outer portion of ring type seal is connected and fixed by normal direction bolt 13.
The supercharging device includes hydraulic power unit 22, and the dynamic monitor includes pressure sensor 24, high pressure gas cylinder
25, acoustic emission sensor 26, electric resistor heating type coil pipe 28, temperature sensor 30, humidity sensor 31, sound emission Acquisition Instrument 32,
Dynamic data acquiring instrument 33, industrial control computer 34 and high-speed camera 36.
Incident rod set 5 is passed through along axle center in the incidence end chamber 6, incident rod set 5 is concentric with incident bar 4 and passes through diameter
Fixed to bolt 14, the incident rod set 5 inside incidence end chamber 6 is parallel with 4 end face of incident bar；Inside incidence end chamber 6
Incident 5 whole body surface of rod set is equipped with annular projection 15, and annular projection 15 is contacted with 6 inner wall of incidence end chamber, 15 table of annular projection
Two ring type seals 12 are arranged in face, and two ring type seals are arranged in 6 end face of incidence end chamber and incident 5 contact portion of rod set
12；Annular projection 15 and incidence end chamber 6 form enclosure space 16.
The circumferential wall surface of incidence end chamber 6 in enclosure space 16 is equipped with oil inlet 17, oil inlet 17 and hydraulic power unit 22
It is connected；Setting air inlet 18 and pressure relief opening 19 in the middle part of incidence end chamber 6 wall surface, air inlet 18 successively with pressure sensor 24 and height
Air bottle 25 connects, and pressure sensor 24 is connect with dynamic data acquiring instrument 33, and relief valve 23 is arranged in pressure relief opening 19, works as incidence end
Pressure in chamber 6 is automatically turned on beyond relief valve 23 after safe pressure threshold value carries out release；In the middle part of 6 wall surface of incidence end chamber
Rectangular-shaped transparent observing window 35 is arranged in 11 position of face sample, and transparent observing window 35 is covered using high strength glass, thoroughly
High-speed camera 36 is arranged in the normal direction of bright watch window 35, believes for acquiring crack propagation during 11 impact fracture of sample
Breath.
4 circular wire channel a20a of axially spaced 90 ° of settings, wire channel a20a are worn in the incidence rod set 5
It penetrates and penetrates rod set 5a and form cylindrical cavity for placing acoustic emission sensor 26, acoustic emission sensor 26 and incident bar in end
Set 5 is contacted by discoidal elastic buffer cushion block 27；The conducting wire of acoustic emission sensor 26 passes through elastic buffer cushion block 27, via
Wire channel a20a is pierced by incident rod set 5, accesses sound emission Acquisition Instrument 32.
Transmission rod set 8 is passed through along axle center in the transmission end chamber 7, transmission rod set 8 is concentric with transmission bar 9 and passes through diameter
It is fixed to bolt 14, it is parallel with the end face of transmission bar 9 in 7 internal transmission rod set 8 of transmission end chamber；Inside transmission end chamber 7
9 whole body of transmission bar is cased with annular projection 15, and annular projection 15 is contacted with 7 inner wall of transmission end chamber, in 15 contact surface of annular projection
Two ring type seals 12 are set, and two ring type seals 12 are arranged in 7 end face of transmission end chamber and transmission 8 contact portion of rod set；
Annular projection 15 and transmission end chamber 7 form enclosure space 16, the circumferential wall surface of the transmission end chamber 7 in enclosure space 16 be equipped with into
Hydraulic fluid port 17, oil inlet 17 are connected with hydraulic power unit 22.
Axially disposed 1 wire channel b20b and 1 fluid passage 21 in the transmission rod set 8, transmission rod set 8 and examination
Two grooves are circumferentially arranged in the contact surface of sample 11, the high voltage bearing electric resistor heating type coil pipe 28 of arrangement, electric resistor heating type in groove
The conducting wire of coil pipe 28 is pierced by transmission rod set 8 via wire channel b20b and connect with industrial control computer 34, passes through industrial control computer 34
Control the heating rate of electric resistor heating type coil pipe 28；Fluid passage 21 is connected to sample 11 and water flooding pump station 29, passes through water flooding pump station
Damp condition in 29 control incidence end chambers 6；It transmits 8 surface of rod set and two annular holes, annular hole bottom and conducting wire is set
Channel b20b connection, be respectively set in two annular holes high pressure resistant humidity temperature sensor 30 and high-temperature and high-presure resistent humidity
Sensor 31, temperature sensor 30 and 31 conducting wire of humidity sensor are pierced by transmission rod set 8 and dynamic via wire channel b20b
Data collecting instrument 33 connects.
This pilot system theoretically can be realized maximum confining pressure 20MPa, highest shock loading 400MPa, and shock loading is lasting
Time maximum 400us, 100 DEG C of maximum temperature, highest relative humidity 80%.
It is described below below with reference to 11 pairs of sample pilot system concrete operating principle operating procedures of the present invention:
1. sample 11 be coal and rock coring to be measured made of cylindrical-shaped structure, diameter 50mm, 25~50mm of length range,
And each surface of sample 11 polishes flat, both ends of the surface irregularity degree is less than 0.02mm, and end face is each perpendicular to axis, and maximum deviation is not
Greater than 0.25 °.Incidence end chamber 6 and transmission end chamber 7 are opened, 11 both ends of the surface of sample are smeared into lubricating grease, are placed in 4 He of incident bar
Among transmission bar 9 and clamp stabilization.
2. incidence end chamber 6 is docked with transmission end chamber 7 and is closed and tightens radial bolts 14, incidence end chamber 6 is opened
The hydraulic power unit 22 connected at 7 oil inlet 17 of transmission end chamber injects hydraulic oil to enclosure space 16.Hydraulic oil act on into
It penetrates rod set 5 and transmits the annular projection 15 of rod set 8, drive incident bar 4 and transmission bar 9 to move to chamber central, to 11 shape of sample
At the initial axial nip stress of 1MPa.
3. opening 6 air inlet 18 of incidence end chamber, air inlet 18 is closed after 1MPa nitrogen is filled with into enclosure space 16.Enter
It penetrates end chamber 6 and stands 2h, whether the reading of pressure sensor 24 observed in incidence end chamber 6 changes, and as unchanged, proves
It is good to penetrate end 6 airtightness of chamber, next step operation can be carried out, otherwise needs the ring packing for checking each junction of incidence end chamber 6
Whether circle 12 connects normal.
4. being again turned on 6 air inlet 18 of incidence end chamber, air inlet is closed after nitrogen to 5MPa is filled with into enclosure space 16
Mouth 18.High pressure nitrogen forms circumference stress to sample 11, and confining pressure size is 5MPa, while the threshold value of 23 release of relief valve being set
It is set to 5MPa.By the gas pressure change inside 24 real-time monitoring incidence end chamber 6 of pressure sensor, keep gas confining pressure steady
Determine 2h.
Liquid water is injected into transmission end chamber 7 by fluid passage 21 5. opening water flooding pump station 29, while utilizing calculating
Machine control electric resistor heating type coil pipe 28 starts to warm up, and passes through 31 real-time monitoring transmission end chamber of temperature sensor 30 and humidity sensor
Temperature and humidity variation in room 7, until temperature and humidity closes water flooding pump station 29 after reaching the required condition of test and resistance adds
Heat.
6. opening 1 control valve 2 of gas chamber, the high pressure gas in gas chamber 1 pushes rapidly trip rod 3 to go out from tracheae, collide into
It penetrates bar 4 and forms impact stress, impact stress acts on sample 11 after propagating in incident bar 4, forms dynamic impulsion to sample 11
Load, sample 11 destroy during Impulsive load.In dynamic impulsion loading procedure, since the movement of incident bar 4 causes
Gas confining pressure in incidence end chamber 6 increases rapidly, and after pressure exceeds release threshold value 5MPa, the automatic opening of relief valve 23 is unloaded
Pressure, holding chamber indoor gas confining pressure is always 5MPa, to realize impact stress load synchronous with confining pressure.
7. in 11 dynamic failure process of sample, micro rupture signal is generated inside sample 11, it is macro in 11 Surface Creation of sample
See fracture crack.Micro rupture signal is received by the acoustic emission sensor 26 of incident 5 end of rod set, is transmitted by wire channel a20a
To sound emission Acquisition Instrument 32,11 surface Macroscopic crackle of sample is deposited by the acquisition of high-speed camera 36 outside transparent observing window 35
Storage.Finally, the inside micro rupture signal and table of 11 impact failure of sample under confining pressure and damp and hot coupling condition are obtained through the invention
Face is broken image information.
The present invention is by the way that confining pressure device to be changed to air pressure and directly acted on around sample by hydraulic, air pressure Impulsive load speed
Fastly, confined pressure steady is not only increased, barrier of the seal rubber sleeve to sample is more avoided, makes it possible to through sound emission and high speed
Photographic apparatus directly acquires inside micro rupture signal and surface fracture image information of the sample during impact failure, more fully
Reflect the dynamic response feature of coal and rock.On the other hand, the present invention provides impact under a kind of confining pressure and damp and hot coupling
The experimental method of load can simulate realistically high confining pressure locating for Deep Underground Space coal and rock, high damp and hot and strong power
Bumpy weather has important value with control mechanism for the prediction of research Deep Underground Space dynamic disaster, for research comprehensively
Coal and rock dynamic response provides important channel, horizontal with control technology for improving the prediction of Deep Underground Space dynamic disaster
With important theory significance and more practical value.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, also do not limit the specific embodiment of the invention.Obviously, according to the content of this specification, can make very much
Modifications and variations.These embodiments are chosen and specifically described to this specification, be principle in order to better explain the present invention and
Practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only wanted by right
Ask the limitation of book and its full scope and equivalent.
Claims (7)
1. coal petrography dynamic impulsion destroys test macro under a kind of confining pressure and damp and hot coupling condition, it is characterised in that: add including impact
It carries and sets and damp and hot power coupling device；The impact loading device and the damp and hot couple of force are attached together setting on same axis, institute
Stating impact loading device is pneumatic control, the external supercharging device of the damp and hot power coupling device, dynamic monitor, described damp and hot
It is installed in power coupling device sample (11), and the damp and hot power coupling device is directly contacted with the sample (11).
2. coal petrography dynamic impulsion destroys test macro under a kind of confining pressure according to claim 1 and damp and hot coupling condition,
Be characterized in that: the impact loading device includes gas chamber (1), control valve (2), trip rod (3), incident bar (4) and transmission bar
(9)；
The control valve (2) controls the folding condition of the gas chamber (1), and the trip rod (3) is located in the gas chamber (1), and
The trip rod (3), the incident bar (4) and the transmission bar (9) are on same axis；
The wet Thermal-mechanical Coupling loading device includes incident rod set (5), incidence end chamber (6), transmission end chamber (7) and transmission bar
It covers (8)；
The incident bar (4), the incident rod set (5) and the incidence end chamber (6) successively sealing socket from inside to outside；It is described
The successively sealing socket from inside to outside of transmission bar (9), the transmission rod set (8) and the transmission end chamber (7)；
It is clamped between the incident bar (4) and the transmission bar (9) sample (11), the incidence end chamber (6) and institute
Transmission end chamber (7) are stated to connect by normal direction bolt (13).
3. coal petrography dynamic impulsion destroys test macro under a kind of confining pressure according to claim 2 and damp and hot coupling condition,
Be characterized in that: the supercharging device includes hydraulic power unit (22)；
The incidence rod set (5) and transmission rod set (8) whole body surface are respectively equipped with annular projection (15), two ring-types
Raised (15) form enclosure space (16) with incidence end chamber (6), the transmission end chamber (7) respectively；
It is provided on the wall surface of the incidence end chamber (6) and the transmission bar chamber (7) in the enclosure space (16)
Oil inlet (17), the oil inlet (17) are connect by pressure duct with hydraulic power unit (22), and the hydraulic power unit (22) is to envelope
It closes in space (16) and is injected with hydraulic oil.
4. coal petrography dynamic impulsion destroys test macro under a kind of confining pressure according to claim 1 or 2 and damp and hot coupling condition,
It is characterized by: the dynamic monitor includes pressure sensor (24), high pressure gas cylinder (25), dynamic data acquiring instrument
(33)；
Air inlet (18) and pressure relief opening (19) are provided in the middle part of the wall surface of the incidence end chamber (6), at the pressure relief opening (19)
It is connected with relief valve (23)；
It is successively connect with the pressure sensor (24) and the high pressure gas cylinder (25) at the air inlet (18), the pressure passes
Sensor (24) is connect with the dynamic data acquiring instrument (33)；
The high pressure gas cylinder (25) injects high pressure gas, the height to the incidence end chamber (6) by the air inlet (18)
Body of calming the anger is applied with circumferential confining pressure to the sample (11).
5. coal petrography dynamic impulsion destroys test macro under a kind of confining pressure according to claim 4 and damp and hot coupling condition,
Be characterized in that: the dynamic monitor includes acoustic emission sensor (26), sound emission Acquisition Instrument (32)；
A plurality of wire channel a (20a) is evenly distributed with for axially spaced 90 ° in the incidence rod set (5), and the sound emission passes
Sensor (26) is evenly distributed on the incident rod set (5) and the sample (11) opposite endface；
Elastic buffer cushion block (27) are arranged in acoustic emission sensor (26) bottom, and acoustic emission sensor (26) conducting wire passes through
The elastic buffer cushion block (27), and the incident bar rod set (5) and sound hair are pierced by via the wire channel a (20a)
Penetrate Acquisition Instrument (32) connection.
6. coal petrography dynamic impulsion destroys test macro under a kind of confining pressure according to claim 4 and damp and hot coupling condition,
Be characterized in that: the dynamic monitor further includes electric resistor heating type coil pipe (28), temperature sensor (30), humidity sensor
(31) and industrial control computer (34)；
Edge is axially arranged with fluid passage (21) and wire channel b (20b), the fluid passage (21) in the transmission rod set (8)
One end contacted with the end face of the sample (11), the other end is connected with water flooding pump station (40)；
Transmission rod set (8) and the sample (11) opposite side end are provided with the electric resistor heating type coil pipe (28),
And the temperature sensor (30) and the humidity sensor (31), the electricity is distributed on transmission rod set (8) surface
It hinders heated type coil pipe (28) and the industrial control computer (34) is accessed by the wire channel b (20b)；The temperature sensor
(30) dynamic data acquiring instrument (33) are connect by the wire channel b (20b) with the conducting wire of humidity sensor (31).
7. coal petrography dynamic impulsion destroys test macro under a kind of confining pressure according to claim 5 or 6 and damp and hot coupling condition,
It is characterized by: the dynamic monitor includes high-speed camera (36)；It is tried described in face in the middle part of the incidence end chamber (6)
The position of sample (11) is provided with transparent observing window (35), and the high-speed camera (36) is correspondingly arranged at the transparent observing window
(35) outside normal direction；The dynamic data acquiring instrument (33), the sound emission Acquisition Instrument (32) and the high-speed photography
It is connected between instrument (36) by conducting wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810607313.1A CN109001053B (en) | 2018-06-13 | 2018-06-13 | Coal rock dynamic impact damage test system under confining pressure and damp-heat coupling condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810607313.1A CN109001053B (en) | 2018-06-13 | 2018-06-13 | Coal rock dynamic impact damage test system under confining pressure and damp-heat coupling condition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109001053A true CN109001053A (en) | 2018-12-14 |
| CN109001053B CN109001053B (en) | 2021-01-12 |
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| CN113281175A (en) * | 2021-04-23 | 2021-08-20 | 中南大学 | Device and method for testing dynamic mechanical properties of rock in gas-solid coupling state |
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| CN110287506A (en) * | 2019-03-20 | 2019-09-27 | 北京航空航天大学 | A kind of fluid solid heat couple analysis method in hydraulic pump plunger pair temperature field |
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| CN113281175A (en) * | 2021-04-23 | 2021-08-20 | 中南大学 | Device and method for testing dynamic mechanical properties of rock in gas-solid coupling state |
| CN113281178A (en) * | 2021-05-19 | 2021-08-20 | 中国人民解放军国防科技大学 | Hydraulic fracturing experimental device and method based on separated Hopkinson pressure bar |
| CN113588460A (en) * | 2021-07-27 | 2021-11-02 | 中南大学 | High-temperature triaxial SHPB device for rock and assembling method and testing method thereof |
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