CN105021471B - Heat flow piercement coal body true triaxial shearing seepage experimental apparatus and its experimental method based on device in Gas - Google Patents
Heat flow piercement coal body true triaxial shearing seepage experimental apparatus and its experimental method based on device in Gas Download PDFInfo
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- CN105021471B CN105021471B CN201510409976.9A CN201510409976A CN105021471B CN 105021471 B CN105021471 B CN 105021471B CN 201510409976 A CN201510409976 A CN 201510409976A CN 105021471 B CN105021471 B CN 105021471B
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Abstract
The invention discloses a kind of heat flow piercement coal body true triaxial shearing seepage experimental apparatus and its experimental method based on device in Gas, its experimental provision part, on the basis of existing technology, box is tested by using the true triaxial of Split type structure form, and the rubber pallet of the special structure form adaptable with experiment box, so that in test specimen detrusion operation is carried out, authenticity, accuracy and the reliability aspect of simulation will be substantially improved, and be easy to monitor；The experimental provision of the present invention, because test specimen to be detected exerts a force in " three axially " of three-dimensional coordinate system simultaneously simultaneously, thus it is a kind of " true triaxial " shearing seepage experimental apparatus truly.The features such as its experimental method, relative to prior art, fidelity is high, and testing result is true, accurate, good reliability.
Description
Technical field
The present invention relates to one kind shearing seepage apparatus and its experimental method, more particularly to a kind of hot-fluid based on device in Gas to consolidate
Couple coal body true triaxial shearing seepage experimental apparatus and its experimental method.
Background technology
Coal body permeability is to study the basic parameter that methane gas or water are migrated in coal body, and its simulation experiment study is
Presently the most common research method.
There is a common ground in the analogue experiment installation of prior art, i.e. it is one that used test specimen, which holds experiment box,
Body formula structure, and situation of the simplex method to stress is only only accounted for, during its experiment, to shear action caused by test specimen
In the presence of largely distortion or misalignment；Moreover, the simulation experiment study of liquid seepage can only be carried out, and can not carry out watt
The research of this gas, larger use limitation be present, comprehensive, systematic research can not be carried out to the seepage flow situation of coal body.
The content of the invention
It is an object of the invention to provide a kind of simple in construction, regulation simplicity, device in Gas can be used as fluid matchmaker
Matter carries out the experimental provision of heat flow piercement coal body true triaxial shearing Seepage Experiment.
The present invention is to achieve the above object the technical scheme adopted is that a kind of heat flow piercement coal body based on device in Gas
True triaxial shears seepage experimental apparatus, is supported the use with hydraulic station, detecting system, it includes frame, the first hydraulic jack, second
Hydraulic cylinder, the 3rd hydraulic cylinder, true triaxial pressure chamber, test specimen apparatus for placing；Wherein：
The frame is tower structure, including top plate, bottom plate and column；
The top plate and bottom plate are rectangular steel plates, are respectively offered at four corner positions of the rectangular steel plates logical
Open-work；
The column is four, and each column is each passed through the corresponding through-hole on the top plate and bottom plate, and passes through spiral shell
Bolt is formed and is detachably connected；
The true triaxial pressure chamber includes the pressure-bearing cylinder barrel that top carries cover；
The pressure-bearing cylinder barrel is bottom lock, the cylinder of open topped, and a circle is provided with the open position of cylinder and is turned over
Side, the cover are face-flange structure, O-ring seal are provided between the cover and pressure-bearing cylinder barrel, and consolidate by bolt
Fixed connection；
The center position of bottom plate one side upward, it is provided with the border circular areas surrounded by a circle flange, the pressure-bearing
Cylinder barrel is erect and is placed on inside the border circular areas；
First hydraulic jack is arranged on the center position on the top plate, the piston rod of first hydraulic jack
The centre bore opened up on the top plate and the cover is vertically each passed through, and is extend into the pressure-bearing cylinder barrel；
Both sides waist in the same level height of the pressure-bearing cylinder barrel, respectively symmetrically it is provided with a connection mouth of pipe, the company
Adapter mouth outer end outwards turns down to form a flange face flange；
The first from left of cylinder seat one of the second hydraulic cylinder and the 3rd hydraulic cylinder is right to be bolted on the pressure-bearing cylinder respectively
The flange face flange opening position of cylinder waist both sides；
The piston rod of the second hydraulic cylinder and the 3rd hydraulic cylinder stretches into/is retracted to the pressure-bearing cylinder in the horizontal direction respectively
In cylinder；
The piston rod of the first hydraulic cylinder is vertically stretched into/is retracted in the pressure-bearing cylinder barrel from up to down；
A fuel feed hole and a steam vent are opened up on the cover respectively, the fuel feed hole passes through the external above-mentioned liquid of hydraulic oil pipe
Press the hydraulic oil delivery pump at station；
Inlet valve is installed on the hydraulic oil pipe；Internal thread is provided with the steam vent inwall, and is sealed by a jackscrew
It is stifled；
The bottom of the pressure-bearing cylinder barrel is additionally provided with an outage, and the outage passes through oil exit pipe and outside oil storage oil
Case is connected, and draining valve is provided with oil exit pipe；
Characterized in that, the test specimen apparatus for placing is combining structure, including a rack assembly and true triaxial experiment
Box；True triaxial experiment box be split-type structural, including two experiment boxes, and this two experiment box one the first from left are right, face-to-face, with
The mode that respective head is bonded with the afterbody of other side, into being symmetrically placed in the rack assembly, by the support
Sub-assembly grips, and shape is integral, is placed on the center of the pressure-bearing cylinder barrel bottom；
In the vertical direction, the end of above-mentioned two experiment box is respectively between the upper and lower frame of the rack assembly
Retain certain gap；
During work, when the piston rod of the first hydraulic cylinder presses downwards, its end is squeezed in above-mentioned positioned at right side
On that experiment box；
The rack assembly includes two supports, and two supports are separate, each arrangement in left and right；
The support is rectangle frame, and two horizontal sides of the rectangle frame are two cylindrical columns, two vertical edges are
Section for square square column, wherein, the both ends of the cylindrical column are respectively arranged with screw thread, the two of the square column
End offers a through-hole respectively, and the both ends of the cylindrical column pass from the through-hole in corresponding square column respectively,
And it is bolted integral；
In above-mentioned two rack assembly, that support positioned at right side, the respective table of side inwardly of its two square columns
On face, be respectively welded with a longitudinal neck, inserted with a bar shaped inserted block in longitudinal neck, the bar shaped inserted block with it is described
Longitudinal neck is into slidable connection；
The experiment box is the hexahedral shape of hollow out, and the center position before it with latter two face offers an insertion
, the first through hole of rectangular cross-section, the center position in two faces of left and right offers an insertion, rectangular cross-section
Two through holes；
The working end of the piston rod of the first hydraulic cylinder and the piston rod of second hydraulic cylinder, respectively it is fixedly connected with
One rectangular-shape briquetting；
The working end of the piston rod of 3rd hydraulic cylinder is fixedly connected with the second rectangular-shape briquetting；
The first neck is offered on the outer surface of the second rectangular-shape briquetting, and passes through first neck and table
The 3rd rectangular-shape briquetting that face is provided with fin forms slidable connection；
The first through hole and shape, the size of the first rectangular-shape briquetting match；
Second through hole respectively with each self-corresponding 4th rectangular-shape briquetting and shape, the chi of the 3rd cuboid briquetting
It is very little to match；
The test specimen apparatus for placing also includes rubber pallet, and the rubber pallet is integral type structure, including two sections, its
In one section be supreme lid and the box of one end end-plate-free, another section be two rubber strips being parallel to each other, and every rubber strip divides
Not as corresponding to the open portion of the box outward flange boundary line, along towards the outside extended line direction in that side of the end-plate-free of box
On, extension forms；
The rubber tray number is two, and the box position of each rubber pallet is embedded in corresponding described second and led to
In hole, into tight fit；
On that face that the experiment box of above-mentioned two into rotational symmetry is bonded to each other, the second through hole vertically on
On the extended line direction in two longitudinal edge boundary lines, the sealing groove to match with the shape of rubber strips, size is respectively arranged with；
The rubber strip is entrapped in the groove, forms tight fit；
On the wall that one end of above-mentioned each experiment respective second through hole of box and rubber pallet end-plate-free abuts, also
Device in Gas access way is offered respectively, and one end of the device in Gas access way connects with above-mentioned second through hole, and the other end is
It is arranged on the experiment box connection mouth of pipe on the wall of side outwardly；
Above-mentioned two device in Gas access way one be import, another be outlet, pass through flexible pipe and the fluid respectively
Medium enters the mouth of pipe and fluid media discharge is tightly connected, and the fluid media enters the mouth of pipe and fluid media discharge
It is connected respectively with device in Gas generating means and device in Gas reception device supporting outside experimental provision by fluid media pipeline；
The box position of above-mentioned two rubber pallet surrounds the cavity of a hexahedral shape jointly, places and uses in the cavity
In the test specimen of heat flow piercement coal body true triaxial shearing Seepage Experiment；The appearance and size of the test specimen matches with the cavity,
When test specimen is put such as the cavity inside, each wall of surrounding of test specimen and cavity forms interference fits；
On above-mentioned first, third and fourth cuboid briquetting and true triaxial pressure chamber cover, pressure is respectively installed
Sensor；
On above-mentioned first, second, and third hydraulic cylinder piston rod, LVDT displacement transducers are respectively installed；
On the inwall of above-mentioned true triaxial pressure chamber, temperature sensor is installed；
Pressure regulation is installed on the fluid media pipeline entered with above-mentioned fluid media between the mouth of pipe and device in Gas generating means
On valve, with above-mentioned fluid media discharge and the fluid media pipeline of device in Gas reception device, device in Gas flowmeter is installed；
Hydraulic oil thermostatic control system is further fixedly arranged on inside the pressure-bearing cylinder barrel, for the hydraulic pressure in pressure-bearing cylinder barrel
Oil temperature carries out dynamic regulation, to keep hydraulic oil constant temperature.
The technical effect directly brought by the technical proposal is that experimental result is true, accurate, reliable；And whole experiment dress
Put that simple in construction, flexible adjustment is easy.
This mainly due to " experiment box is split-type structural, including two experiment boxes, this two experiment box one the first from left are right,
Face-to-face, in a manner of being bonded by respective head with the afterbody of other side, into being symmetrically placed in the rack assembly, by
The rack assembly grips, and shape is integral, is placed on the center of the pressure-bearing cylinder barrel bottom；During work, when
When the piston rod of the first hydraulic cylinder presses downwards, its end is squeezed on above-mentioned that experiment box positioned at right side ", make
Test specimen is obtained when the piston rod of first hydraulic cylinder presses downwards, its suffered shearing force will not be by experiment box body in itself because stress becomes
The reaction force of the force downward with the piston rod of first hydraulic cylinder, in turn results in active force suffered by test specimen reality caused by shape
Size distortion, misalignment (that is, the active force of the application detected and " active force " in actual transfer to test specimen size therebetween
Distortion, misalignment).
Moreover, " in the vertical direction, the end upper and lower side with the rack assembly respectively of above-mentioned two experiment box
Retain certain gap between frame ", the use of this technological means so that right side experiment box applies work vertically downward in piston rod
In the case of firmly, relative (dislocation) displacement can vertically occur between left side experiment box and right side experiment box.That is, if
The test specimen in the chamber of the hexahedral shape surrounded jointly in left and right sides experiment box is put, detrusion trend will occur or cut
Shear deformation, this shearing strain quantity is by continuous enlargement, until test specimen is sheared destruction.It is not difficult to find out, this split-type structural shape
The true triaxial experiment box of formula, relative to the experiment box of the integral structure form of prior art, is carrying out test specimen detrusion behaviour
In work, authenticity, accuracy and the reliability aspect of simulation will be substantially improved, and be more convenient for monitoring.
In above-mentioned technical proposal, used due to supporting " rubber pallet for integral type structure, including two sections, one section therein
For supreme lid and the box of one end end-plate-free, another section is two rubber strips being parallel to each other, and every rubber strip is respectively by described
Outward flange boundary line corresponding to the open portion of box, along towards on the outside extended line direction in that side of the end-plate-free of box, extension
Into ", the rubber pallet of such a special structure form, on the one hand, so that the structure of true triaxial experiment box is more reasonable, group
Dress is more convenient；On the other hand, in experimentation, the stress of the left and right sides of test specimen in the horizontal direction is by second and the 3rd liquid
The piston rod of cylinder pressure provides, by being transferred at left and right sides of rubber support disk on test specimen.Because the favorable elasticity of quality of rubber materials deforms
Ability so that detected second and the 3rd hydraulic cylinder piston rod force, with test specimen actual loading, number therebetween
Value difference significantly reduces (or even can be described as, can be neglected)；It is of particular importance that another further aspect, this special structure form
Rubber pallet, it is ensured that left and right sides experiment box is when being assembled integrally, this contact tested boxes at two and be bonded to each other
The good sealing of the gas/liquid in face.
Be additionally, since () " in two rack assemblies, that support positioned at right side, the respective court of its two square columns
On the surface of interior side, a longitudinal neck is respectively welded with, longitudinal neck is interior inserted with a bar shaped inserted block, the bar shaped
Inserted block and longitudinal neck are into slidable connection ".The use of this technological means so that test box in first hydraulic cylinder in right side
Piston rod vertically downward force effect under, right side experiment box and rack assembly frame between frictional resistance significantly subtract
It is small.
Further, in above-mentioned technical proposal, " the piston rod of (applying extruding force from right side to test specimen) the 3rd hydraulic cylinder
Working end be fixedly connected with the second rectangular-shape briquetting；The first card is offered on the outer surface of second rectangular-shape briquetting
Groove, and the 3rd rectangular-shape briquetting for being provided with by the first neck and surface fin forms slidable connection ", this technology hand
The use of section so that when test specimen is pressed down against in the piston rod of first piston cylinder, detrusion, fracture, dislocation, examination occur for test specimen
When the right half part of part produces downward mobile trend or displacement, due to the 3rd rectangular-shape pressure directly contacted with test specimen
Block can between test specimen and the 3rd rectangular-shape briquetting under the drive of frictional force, be generated synchronously with downward mobile trend or
Displacement.That is, initial reference position is in test specimen, move downward and deviate reference position, in whole motion process, the 3rd hydraulic pressure
The extruding force on direction can be consistent the piston rod of cylinder all the time from right to left, be not in any jam or failure, entered
And influence the distortion of experimental result.
The combinations of above-mentioned technological means a series of uses so that each force and movement under force executing agency are mutually coordinated, phase
Interworking unification causes, and turns into an organically unified entirety, effectively further ensure that the authenticity and accuracy of experimental result.
Further preferably, above-mentioned gap is more than 30mm.
What the optimal technical scheme was directly brought has the technical effect that, generally, used raw coal (rock) or the examination of moulded coal standard
The appearance and size of part is 200 × 100 × 100mm, and practical experience proves, when test specimen is because of failure by shear, right side experiment box is downward
Relative shift be respectively less than 30mm.Therefore, it is 30mm by above-mentioned Interval selecting, it is compacter in structure, reasonable.
Further preferably, sealed between the piston rod and cover of above-mentioned first hydraulic jack using hole with Glais ring；
Hole is used between the piston rod and the pressure-bearing cylinder barrel left and right sidewall of the second hydraulic cylinder and the 3rd hydraulic cylinder
Sealed with Glais ring.
What the optimal technical scheme was directly brought has the technical effect that, in this way it can be ensured that this is with pressure closed for pressure-bearing cylinder barrel
Container work is in stable condition, reliable.
Further preferably, the material of above-mentioned rubber pallet is IIR butyl rubbers.
What the optimal technical scheme was directly brought has the technical effect that, the material by rubber pallet is preferably IIR butyl rubbers,
Primary concern is that IIR butyl rubbers have good a chemical stability and heat endurance, excellent air-tightness and watertightness,
And oil resistivity is good, particularly suitable for its specifically used operating mode.
Further preferably, the thickness of above-mentioned rubber pallet is more than 10mm.
What the optimal technical scheme was directly brought has the technical effect that, it has been experienced that, the thickness of rubber pallet is more than 10mm,
It can ensure that its own has intensity that is certain, being easy to experimental implementation；Also, thickness is more than 10mm, it is ensured that it is not fragile
Damage, has good service life.
The second object of the present invention is to provide a kind of above-mentioned heat flow piercement coal body true triaxial shearing based on device in Gas and oozed
Flow the experimental method of experimental provision
The present invention is to realize the purpose the technical scheme adopted is that a kind of heat flow piercement coal body based on device in Gas is true
The experimental method of triaxial machining seepage experimental apparatus, it is characterised in that comprise the following steps：
The first step, Preparatory work of experiment：
According to requirement of experiment, it is previously prepared go out rectangular shape raw coal (rock) or moulded coal standard specimen, enter drying box,
Under the conditions of 80 DEG C, dry 24 hours, take out and wrapped with preservative film, be cooled to room temperature, it is standby；
When experiment starts, first start each hydraulic cylinder and its respective piston rod bounces back, then open the cylinder of pressure-bearing cylinder barrel
Lid；Meanwhile two rubber pallets and two experiment boxes are assembled respectively；
Then, the preservative film on test specimen is removed, uniformly smears one respectively on four walls of the front, rear, left and right of test specimen
Thickness about 0.5mm 704 silica gel；
After silica gel condensation, test specimen is placed on the hexahedral shape that the box positions of two rubber pallets surrounds jointly
In cavity, and whole test specimen apparatus for placing is assembled in place by rack assembly, the bottom centre position being put into pressure-bearing cylinder barrel
Put；
Second step, switch on power, the piston rod of the piston rod and the 3rd hydraulic cylinder that operate second hydraulic cylinder synchronously stretches out, directly
To its, each end face is in contact with true triaxial experiment box, completes to the spacing of true triaxial experiment box；
Start monitoring device, while read, store the initial value of following instrument：It is separately mounted to first, the 3rd,
Pressure sensor on four cuboid briquettings and true triaxial pressure chamber cover, is separately mounted to first, second, and third hydraulic pressure
LVDT displacement transducers on cylinder piston rod, the temperature sensor on true triaxial pressure chamber inwall, and installed in true
D07-11CM type gas mass flow gauge or DMF-1 series of fluids on the external pipeline of triaxial tests box gas exhaust pipe mouth
Mass flowmenter；
3rd step, experimental procedure：
Cover the cover of pressure-bearing cylinder barrel, open inlet valve, the closure jackscrew of removal steam vent, closing draining valve；
Then, start oil feed pump, hydraulic oil is slowly injected into pressure-bearing cylinder barrel；Entertain and be already filled with hydraulic pressure in cylinder pressure cylinder
Oil, steam vent screw on jackscrew and block steam vent there is no during gas discharge；
Oil feed pump opening is kept, so that hydraulic fluid pressure reaches and is maintained at setting pressure in pressure-bearing cylinder barrel；
Thermostatic control system is opened, by hydraulic fluid temperature control in pressure-bearing cylinder barrel in design temperature；
Then, device in Gas air-supplying valve is opened, by the pressure regulation valve regulation on device in Gas supply air line to setting value, and is kept
The supply gas pressure of device in Gas is constant；
After the device in Gas flowmeter registration on gas exhaust piping is in stable state, the air bleeding valve on closing gas exhaust piping
Door, and continue to keep device in Gas air-supplying valve to be in opening, so that test specimen is in the dynamic equilibrium of an adsorption and desorption
State, 24 hours and then open gas exhaust piping on drain tap；
After gas flowmeter registration is again at stable state, to hydraulic oil pressure force value, the first hydraulic pressure in pressure-bearing cylinder barrel
The extruding force numerical value of the piston rod of the extruding force numerical value of the piston rod of cylinder, the piston rod of second hydraulic cylinder and the 3rd hydraulic cylinder is carried out
Serialization dynamic regulation, during regulation：The extruding force of the piston rod of the piston rod of second hydraulic cylinder and the 3rd hydraulic cylinder is synchronous
Regulation, to ensure the symmetry of test specimen loading, and above-mentioned second hydraulic cylinder piston rod and the 3rd hydraulic cylinder piston rod are applied to examination
Extruding force on part is more than hydraulic oil pressure force value in pressure-bearing cylinder barrel；
Test specimen is treated under the piston rod extruding of first hydraulic cylinder, during by overall shear failure, first hydraulic cylinder piston rod
Loading procedure is completed；
In above-mentioned whole experiment process, monitoring system monitored over time, record by each instrument be transmitted back to Lai information, these
Information includes test specimen stress, displacement vector, the piston rod force size of each hydraulic cylinder, temperature, the pressure of methane gas, stream
Measure the situation of change of data and above-mentioned each data.
The technical effect directly brought by the technical proposal is that in experimentation, whole experimental provision is easy to operate, regulation
Nimbly and freely, all detection data are detected using automatic instrument(s), recorded.It is the most key, carrying out simulated experiment process
In, its fidelity is high, and testing result is true, accurate, good reliability.
In summary, the present invention has the advantages that relative to prior art：
1st, experimental provision is simple in construction, rationally distributed, easy to operate, flexible adjustment；
2nd, during heat flow piercement coal body shearing Seepage Experiment is carried out, it applies this experimental provision in vertical direction
While active force, also applied with fore-and-aft direction (fore-and-aft direction transmits pressure by the hydraulic oil in pressure-bearing cylinder barrel) in the horizontal direction
Add active force, realize " three axles " force truly, thus be " true triaxial ".
3rd, during simulated experiment is carried out, its fidelity is high, and testing result is true, accurate, good reliability.
Brief description of the drawings
Fig. 1 is the overall axle geodesic structure schematic diagram of the present invention；
Fig. 2 is the true triaxial pressure chamber internal structure schematic diagram of the present invention (not including pressure-bearing cylinder shell)；
Fig. 3 is the experiment box axle geodesic structure schematic diagram of the present invention；
Fig. 4 is the present invention looks up structural representation of the experiment box of the present invention；
Fig. 5 is the axle geodesic structure schematic diagram of the rubber pallet of the present invention；
Fig. 6 is the axle geodesic structure schematic diagram of the test specimen apparatus for placing of the present invention；
Fig. 7 is the side structure schematic view of the test specimen apparatus for placing of the present invention.
Embodiment
Below in conjunction with the accompanying drawings, the present invention is described in detail.
As shown in Figure 1 and Figure 2, the heat flow piercement coal body true triaxial shearing Seepage Experiment dress of the invention based on device in Gas
Put, used with hydraulic station 6, detecting system supporting 7, it includes frame 2, the first hydraulic jack 5, second hydraulic cylinder 3, the 3rd hydraulic pressure
Cylinder 4, true triaxial pressure chamber 1, test specimen apparatus for placing；Wherein：
Above-mentioned frame 2 is tower structure, including top plate 21, bottom plate 22 and column；
Above-mentioned top plate and bottom plate are rectangular steel plates, are respectively offered at four corner positions of above-mentioned rectangular steel plates logical
Open-work；
Above-mentioned column is four, and each column is each passed through the corresponding through-hole on above-mentioned top plate and bottom plate, and passes through spiral shell
Bolt is formed and is detachably connected；
Above-mentioned true triaxial pressure chamber includes the pressure-bearing cylinder barrel that top carries cover 11；
Above-mentioned pressure-bearing cylinder barrel is bottom lock, the cylinder of open topped, and a circle is provided with the open position of cylinder and is turned over
Side, above-mentioned cover are face-flange structure, O-ring seal are provided between above-mentioned cover and pressure-bearing cylinder barrel, and consolidate by bolt
Fixed connection；
The center position of above-mentioned bottom plate one side upward, it is provided with the border circular areas surrounded by a circle flange, above-mentioned pressure-bearing
Cylinder barrel is erect and is placed on inside the border circular areas；
Above-mentioned first hydraulic jack is arranged on the center position on above-mentioned top plate, the piston rod of above-mentioned first hydraulic jack
The centre bore opened up on above-mentioned top plate and above-mentioned cover is vertically each passed through, and is extend into above-mentioned pressure-bearing cylinder barrel；
Both sides waist in the same level height of above-mentioned pressure-bearing cylinder barrel, respectively symmetrically it is provided with a connection mouth of pipe, above-mentioned company
Adapter mouth outer end outwards turns down to form a flange face flange；
The first from left of cylinder seat one of the above-mentioned hydraulic cylinder 4 of second hydraulic cylinder 3 and the 3rd is right to be bolted on above-mentioned pressure-bearing respectively
The flange face flange opening position of cylinder barrel waist both sides；
The piston rod of above-mentioned second hydraulic cylinder and the 3rd hydraulic cylinder stretches into/is retracted to above-mentioned pressure-bearing cylinder in the horizontal direction respectively
In cylinder；
The piston rod of above-mentioned first hydraulic cylinder is vertically stretched into/is retracted in above-mentioned pressure-bearing cylinder barrel from up to down；
A fuel feed hole and a steam vent are opened up on above-mentioned cover respectively, above-mentioned fuel feed hole passes through the external above-mentioned liquid of hydraulic oil pipe
Press the hydraulic oil delivery pump at station；
Inlet valve is installed on above-mentioned hydraulic oil pipe；Internal thread is provided with above-mentioned steam vent inwall, and is sealed by a jackscrew
It is stifled；
The bottom of above-mentioned pressure-bearing cylinder barrel is additionally provided with an outage, and above-mentioned outage passes through oil exit pipe and outside oil storage oil
Case is connected, and draining valve is provided with oil exit pipe；
As shown in Figures 3 to 5, it is characterised in that above-mentioned test specimen apparatus for placing is combining structure, including a rack assembly
10 and one true triaxial experiment box 8；Above-mentioned true triaxial experiment box be split-type structural, including two experiment boxes, and this two are tested boxes
One the first from left is right, face-to-face, in a manner of being bonded by respective head with the afterbody of other side, into being symmetrically placed on above-mentioned support group
In component, gripped by above-mentioned rack assembly, shape is integral, is placed on the center of above-mentioned pressure-bearing cylinder barrel bottom；
In the vertical direction, the end of above-mentioned two experiment box is respectively between the upper and lower frame of above-mentioned rack assembly
Retain certain gap；
During work, when the piston rod of above-mentioned first hydraulic cylinder presses downwards, its end is squeezed in above-mentioned positioned at right side
On that experiment box.
Above-mentioned rack assembly includes two supports, and two supports are separate, each arrangement in left and right；
Above-mentioned support is rectangle frame, and two horizontal sides of above-mentioned rectangle frame are two cylindrical columns, two vertical edges are
Section for square square column, wherein, the both ends of above-mentioned cylindrical column are respectively arranged with screw thread, the two of above-mentioned square column
End offers a through-hole respectively, and the both ends of above-mentioned cylindrical column pass from the through-hole in corresponding square column respectively,
And it is bolted integral；
As shown in Figure 6, Figure 7, in above-mentioned two rack assembly, that support positioned at right side, its two square columns are each
From the surface of side inwardly, a longitudinal neck 302 is respectively welded with, above-mentioned longitudinal neck is interior inserted with a bar shaped inserted block
301, above-mentioned bar shaped inserted block 301 and above-mentioned longitudinal neck 302 are into slidable connection；
As shown in figure 3, above-mentioned experiment box 8 is the hexahedral shape of hollow out, the center position before it with latter two face is opened
Provided with an insertion, the first through hole 202 of rectangular cross-section, the center position in two faces of left and right offer an insertion,
Second through hole 201 of rectangular cross-section；
The working end of the piston rod of above-mentioned first hydraulic cylinder and the piston rod of second hydraulic cylinder, respectively it is fixedly connected with
One rectangular-shape briquetting 115；
The working end of the piston rod of above-mentioned 3rd hydraulic cylinder is fixedly connected with the second rectangular-shape briquetting 104；
The first neck is offered on the outer surface of above-mentioned second rectangular-shape briquetting, and passes through above-mentioned first neck and table
The 3rd rectangular-shape briquetting that face is provided with fin forms slidable connection；(not shown)
Above-mentioned first through hole and shape, the size of above-mentioned first rectangular-shape briquetting match；
Above-mentioned second through hole respectively with each self-corresponding 4th rectangular-shape briquetting and shape, the chi of the 3rd cuboid briquetting
It is very little to match；
As shown in figure 5, above-mentioned test specimen apparatus for placing also includes rubber pallet 9, above-mentioned rubber pallet is integral type structure,
Including two sections, one section therein is supreme lid and the box 207 of one end end-plate-free, and another section is two rubber strips being parallel to each other
206, every rubber strip respectively as corresponding to the open portion of above-mentioned box outward flange boundary line, along towards that side of the end-plate-free of box
On outside extended line direction, extension forms；
Above-mentioned rubber tray number is two, and the position of box 9 of each rubber pallet is embedded in corresponding above-mentioned second
In through hole, into tight fit；
As shown in figure 3, on that face that the experiment box of above-mentioned two into rotational symmetry is bonded to each other, the second through hole is along perpendicular
On the extended line direction in two upward longitudinal edge boundary lines of Nogata, it is respectively arranged with and matches with above-mentioned shape of rubber strips, size
Groove 205 is used in sealing；
Above-mentioned rubber strip is entrapped in above-mentioned groove, forms tight fit；
As shown in Figure 3, Figure 4, in that one end of above-mentioned each experiment respective second through hole of box and rubber pallet end-plate-free
On adjacent wall, device in Gas access way 203, one end of above-mentioned device in Gas access way and above-mentioned second are also offered respectively
Through hole connects, and the other end is to be arranged on the experiment box connection mouth of pipe 204 on the wall of side outwardly；
Above-mentioned two device in Gas access way one be import, another be outlet, pass through flexible pipe and above-mentioned fluid respectively
Medium enters the mouth of pipe and fluid media discharge is tightly connected, and above-mentioned fluid media enters the mouth of pipe and fluid media discharge
(do not show in figure with device in Gas generating means 12 (as shown in Figure 2) and device in Gas reception device supporting outside experimental provision respectively
Go out) connected by fluid media pipeline；
The box position of above-mentioned two rubber pallet surrounds the cavity of a hexahedral shape jointly, places and uses in above-mentioned cavity
In the test specimen of heat flow piercement coal body true triaxial shearing Seepage Experiment；The appearance and size of above-mentioned test specimen matches with above-mentioned cavity,
When test specimen is put such as the cavity inside, each wall of surrounding of test specimen and cavity forms interference fits；
On above-mentioned first, third and fourth cuboid briquetting and true triaxial pressure chamber cover, pressure is respectively installed
Sensor；
On above-mentioned first, second, and third hydraulic cylinder piston rod, LVDT displacement transducers are respectively installed；
On the inwall of above-mentioned true triaxial pressure chamber, temperature sensor is installed；
Pressure regulation is installed on the fluid media pipeline entered with above-mentioned fluid media between the mouth of pipe and device in Gas generating means
On valve, with above-mentioned fluid media discharge and the fluid media pipeline of device in Gas reception device, device in Gas flowmeter is installed；
As shown in Fig. 2 hydraulic oil thermostatic control system 110 is further fixedly arranged on inside the pressure-bearing cylinder barrel, for holding
Hydraulic oil temperature in cylinder pressure cylinder carries out dynamic regulation, to keep hydraulic oil constant temperature.
Above-mentioned gap is more than 30mm.
Sealed between the piston rod and cover of above-mentioned first hydraulic jack using hole with Glais ring；
Hole is used between the piston rod and above-mentioned pressure-bearing cylinder barrel left and right sidewall of above-mentioned second hydraulic cylinder and the 3rd hydraulic cylinder
Sealed with Glais ring.
The material of above-mentioned rubber pallet is IIR butyl rubbers.
The thickness of above-mentioned rubber pallet is more than 10mm.
To more fully understand the present invention, cut the following detailed description of the above-mentioned heat flow piercement coal body true triaxial based on device in Gas
Cut the experimental method of seepage experimental apparatus.
The experimental method of the above-mentioned heat flow piercement coal body true triaxial shearing seepage experimental apparatus based on device in Gas, its feature
It is, comprises the following steps：
The first step, Preparatory work of experiment：
According to requirement of experiment, it is previously prepared go out rectangular shape raw coal (rock) or moulded coal standard specimen, enter drying box,
Under the conditions of 80 DEG C, dry 24 hours, take out and wrapped with preservative film, be cooled to room temperature, it is standby；
When experiment starts, first start each hydraulic cylinder and its respective piston rod bounces back, then open the cylinder of pressure-bearing cylinder barrel
Lid；Meanwhile two rubber pallets and two experiment boxes are assembled respectively；
Then, the preservative film on test specimen is removed, uniformly smears one respectively on four walls of the front, rear, left and right of test specimen
Thickness about 0.5mm 704 silica gel；
After silica gel condensation, test specimen is placed on the hexahedral shape that the box positions of two rubber pallets surrounds jointly
In cavity, and whole test specimen apparatus for placing is assembled in place by rack assembly, the bottom centre position being put into pressure-bearing cylinder barrel
Put；
Second step, switch on power, the piston rod of the piston rod and the 3rd hydraulic cylinder that operate second hydraulic cylinder synchronously stretches out, directly
To its, each end face is in contact with true triaxial experiment box, completes to the spacing of true triaxial experiment box；
Start monitoring device, while read, store the initial value of following instrument：It is separately mounted to first, the 3rd,
Pressure sensor on four cuboid briquettings and true triaxial pressure chamber cover, is separately mounted to first, second, and third hydraulic pressure
LVDT displacement transducers on cylinder piston rod, the temperature sensor on true triaxial pressure chamber inwall, and installed in true
D07-11CM type gas mass flow gauge or DMF-1 series of fluids on the external pipeline of triaxial tests box gas exhaust pipe mouth
Mass flowmenter；
3rd step, experimental procedure：
Cover the cover of pressure-bearing cylinder barrel, open inlet valve, the closure jackscrew of removal steam vent, closing draining valve；
Then, start oil feed pump, hydraulic oil is slowly injected into pressure-bearing cylinder barrel；Entertain and be already filled with hydraulic pressure in cylinder pressure cylinder
Oil, steam vent screw on jackscrew and block steam vent there is no during gas discharge；
Oil feed pump opening is kept, so that hydraulic fluid pressure reaches and is maintained at setting pressure in pressure-bearing cylinder barrel；
Thermostatic control system is opened, by hydraulic fluid temperature control in pressure-bearing cylinder barrel in design temperature；
Then, device in Gas air-supplying valve is opened, by the pressure regulation valve regulation on device in Gas supply air line to setting value, and is kept
The supply gas pressure of device in Gas is constant；
After the device in Gas flowmeter registration on gas exhaust piping is in stable state, the air bleeding valve on closing gas exhaust piping
Door, and continue to keep device in Gas air-supplying valve to be in opening, so that test specimen is in the dynamic equilibrium of an adsorption and desorption
State, 24 hours and then open gas exhaust piping on drain tap；
After gas flowmeter registration is again at stable state, to hydraulic oil pressure force value, the first hydraulic pressure in pressure-bearing cylinder barrel
The extruding force numerical value of the piston rod of the extruding force numerical value of the piston rod of cylinder, the piston rod of second hydraulic cylinder and the 3rd hydraulic cylinder is carried out
Serialization dynamic regulation, during regulation：The extruding force of the piston rod of the piston rod of second hydraulic cylinder and the 3rd hydraulic cylinder is synchronous
Regulation, to ensure the symmetry of test specimen loading, and above-mentioned second hydraulic cylinder piston rod and the 3rd hydraulic cylinder piston rod are applied to examination
Extruding force on part is more than hydraulic oil pressure force value in pressure-bearing cylinder barrel；
Test specimen is treated under the piston rod extruding of first hydraulic cylinder, during by overall shear failure, first hydraulic cylinder piston rod
Loading procedure is completed；
In above-mentioned whole experiment process, monitoring system monitored over time, record by each instrument be transmitted back to Lai information, these
Information includes test specimen stress, displacement vector, the piston rod force size of each hydraulic cylinder, temperature, the pressure of methane gas, stream
Measure the situation of change of data and above-mentioned each data.
Claims (6)
- A kind of 1. heat flow piercement coal body true triaxial shearing seepage experimental apparatus based on device in Gas, with hydraulic station, detecting system Support the use；Heat flow piercement coal body true triaxial shearing seepage experimental apparatus based on device in Gas includes frame, the first hydraulic oil Cylinder, second hydraulic cylinder, the 3rd hydraulic cylinder, true triaxial pressure chamber, test specimen apparatus for placing；Wherein：The frame is tower structure, including top plate, bottom plate and column；The top plate and bottom plate are rectangular steel plates, are respectively offered at four corner positions of the rectangular steel plates penetrating Hole；The column is four, and each column is each passed through the corresponding through-hole on the top plate and bottom plate, and passes through bolt shape Into being detachably connected；The true triaxial pressure chamber includes the pressure-bearing cylinder barrel that top carries cover；The pressure-bearing cylinder barrel is bottom lock, the cylinder of open topped, and a circle flange, institute are provided with the open position of cylinder It is face-flange structure to state cover, and O-ring seal, and the company of being bolted are provided between the cover and pressure-bearing cylinder barrel Connect；The center position of bottom plate one side upward, it is provided with the border circular areas surrounded by a circle flange, the pressure-bearing cylinder barrel Setting is placed on inside the border circular areas；First hydraulic jack is arranged on the center position on the top plate, and the piston rod edge of first hydraulic jack is perpendicular Nogata is extend into the pressure-bearing cylinder barrel to being each passed through the centre bore that is opened up on the top plate and the cover；Both sides waist in the same level height of the pressure-bearing cylinder barrel, respectively symmetrically it is provided with a connection mouth of pipe, the connecting tube Mouth outer end outwards turns down to form a flange face flange；In the two side walls of the pressure-bearing cylinder barrel, it is also respectively provided with a fluid media and enters the mouth of pipe and a fluid media discharge pipe Mouthful；The first from left of cylinder seat one of the second hydraulic cylinder and the 3rd hydraulic cylinder is right to be bolted on the pressure-bearing cylinder barrel waist respectively The flange face flange opening position of portion both sides；The piston rod of the second hydraulic cylinder and the 3rd hydraulic cylinder stretches into/is retracted to the pressure-bearing cylinder barrel in the horizontal direction respectively It is interior；The piston rod of the first hydraulic cylinder is vertically stretched into/is retracted in the pressure-bearing cylinder barrel from up to down；A fuel feed hole and a steam vent are opened up on the cover respectively, the fuel feed hole passes through the external above-mentioned hydraulic station of hydraulic oil pipe Hydraulic oil delivery pump；Inlet valve is installed on the hydraulic oil pipe；Internal thread is provided with the steam vent inwall, and is blocked by a jackscrew；The bottom of the pressure-bearing cylinder barrel is additionally provided with an outage, and the outage is connected by oil exit pipe and outside oil storage fuel tank Connect, draining valve is installed on oil exit pipe；Characterized in that, the test specimen apparatus for placing is combining structure, including a rack assembly and true triaxial experiment box；Institute It is split-type structural to state true triaxial experiment box, including two experiment boxes, and this two experiment box one the first from left are right, face-to-face, with respective The mode that is bonded with the afterbody of other side of head, into being symmetrically placed in the rack assembly, by the holder combination Part grips, and shape is integral, is placed on the center of the pressure-bearing cylinder barrel bottom；In the vertical direction, the end of above-mentioned two experiment box retain between the upper and lower frame of the rack assembly respectively Certain gap；During work, when the piston rod of the first hydraulic cylinder presses downwards, its end is squeezed in above-mentioned that positioned at right side On individual experiment box；The rack assembly includes two supports, and two supports are separate, each arrangement in left and right；The support is rectangle frame, and two horizontal sides of the rectangle frame are two cylindrical columns, two vertical edges are section For the square column of square, wherein, the both ends of the cylindrical column are respectively arranged with screw thread, the both ends point of the square column A through-hole is not offered, and the both ends of the cylindrical column pass from the through-hole in corresponding square column respectively, and lead to Bolt is crossed to be integrally fixed；In above-mentioned two rack assembly, that support positioned at right side, its two square columns are each inwardly on the surface of side, A longitudinal neck is respectively welded with, longitudinal neck is interior inserted with a bar shaped inserted block, the bar shaped inserted block and the longitudinal direction Neck is into slidable connection；The experiment box is the hexahedral shape of hollow out, offer with the center position in latter two face before it insertion, cut Face is the first through hole of rectangle, and the center position in two faces of left and right offers an insertion, rectangular cross-section second and led to Hole；The working end of the piston rod of the first hydraulic cylinder and the piston rod of second hydraulic cylinder, respectively it is fixedly connected with the first length Cube briquetting；The working end of the piston rod of 3rd hydraulic cylinder is fixedly connected with the second cuboid briquetting；The first neck is offered on the outer surface of the second cuboid briquetting, and is set by first neck and surface The 3rd cuboid briquetting for having fin forms slidable connection；The first through hole and shape, the size of the first cuboid briquetting match；Second through hole shape, the size phase with each self-corresponding 4th cuboid briquetting and the 3rd cuboid briquetting respectively Match somebody with somebody；The test specimen apparatus for placing also includes rubber pallet, and the rubber pallet is integral type structure, including two sections, it is therein One section is supreme lid and the box of one end end-plate-free, and another section is two rubber strips being parallel to each other, every rubber strip respectively by Outward flange boundary line corresponding to the open portion of the box, along towards on the outside extended line direction in that side of the end-plate-free of box, Extension forms；The rubber tray number is two, and the box position of each rubber pallet is embedded in corresponding second through hole It is interior, into tight fit；On that face that the experiment box of above-mentioned two into rotational symmetry is bonded to each other, the second through hole vertically on it is two vertical To on the extended line direction of boundary line, the sealing groove to match with the shape of rubber strips, size is respectively arranged with；The rubber strip is entrapped in the groove, forms tight fit；On the wall that one end of above-mentioned each experiment respective second through hole of box and rubber pallet end-plate-free abuts, also distinguish Device in Gas access way is offered, one end of the device in Gas access way connects with above-mentioned second through hole, and the other end is setting Testing the box connection mouth of pipe on the wall of side outwardly；Above-mentioned two device in Gas access way one be import, another be outlet, pass through flexible pipe and the fluid media respectively It is tightly connected into the mouth of pipe and fluid media discharge, the fluid media enters the mouth of pipe and fluid media discharge is distinguished It is connected with device in Gas generating means and device in Gas reception device supporting outside experimental provision by fluid media pipeline；The box position of above-mentioned two rubber pallet surrounds the cavity of a hexahedral shape jointly, is placed in the cavity for heat Fluid structurecoupling coal body true triaxial shears the test specimen of Seepage Experiment；The appearance and size of the test specimen matches with the cavity, works as examination When part is put into the cavity inside, each wall of surrounding of test specimen and cavity forms interference fits；On above-mentioned first, third and fourth cuboid briquetting and true triaxial pressure chamber cover, pressure sensing is respectively installed Device；On above-mentioned first, second, and third hydraulic cylinder piston rod, LVDT displacement transducers are respectively installed；On the inwall of above-mentioned true triaxial pressure chamber, temperature sensor is installed；Pressure regulator valve is installed on the fluid media pipeline entered with above-mentioned fluid media between the mouth of pipe and device in Gas generating means, with Above-mentioned fluid media discharge is with the fluid media pipeline of device in Gas reception device, being provided with device in Gas flowmeter；Hydraulic oil thermostatic control system is further fixedly arranged on inside the pressure-bearing cylinder barrel, for the hydraulic oil temperature in pressure-bearing cylinder barrel Dynamic regulation is carried out, to keep hydraulic oil constant temperature.
- 2. the heat flow piercement coal body true triaxial shearing seepage experimental apparatus according to claim 1 based on device in Gas, its It is characterised by, the gap is more than 30mm.
- 3. the heat flow piercement coal body true triaxial shearing seepage experimental apparatus according to claim 1 based on device in Gas, its It is characterised by, is sealed between the piston rod and cover of first hydraulic jack using hole with Glais ring；Hole lattice are used between the piston rod and the pressure-bearing cylinder barrel left and right sidewall of the second hydraulic cylinder and the 3rd hydraulic cylinder Lai Quan is sealed.
- 4. the heat flow piercement coal body true triaxial shearing seepage experimental apparatus according to claim 1 based on device in Gas, its It is characterised by, the material of the rubber pallet is IIR butyl rubbers.
- 5. the heat flow piercement coal body true triaxial shearing seepage experimental apparatus according to claim 1 based on device in Gas, its It is characterised by, the thickness of the rubber pallet is more than 10mm.
- 6. the experiment of the heat flow piercement coal body true triaxial shearing seepage experimental apparatus based on device in Gas as claimed in claim 1 Method, it is characterised in that comprise the following steps：The first step, Preparatory work of experiment：According to requirement of experiment, it is previously prepared go out rectangular shape raw coal rock or moulded coal standard specimen, enter drying box, in 80 DEG C of bars Under part, dry 24 hours, take out and wrapped with preservative film, be cooled to room temperature, it is standby；When experiment starts, first start each hydraulic cylinder and its respective piston rod bounces back, then open the cover of pressure-bearing cylinder barrel；Together When, two rubber pallets and two experiment boxes are assembled respectively；Then, the preservative film on test specimen is removed, uniformly smears a thickness respectively on four walls of the front, rear, left and right of test specimen 0.5mm 704 silica gel；After silica gel condensation, test specimen is placed on to the cavity for the hexahedral shape that the box positions of two rubber pallets surrounds jointly It is interior, and assembled whole test specimen apparatus for placing in place by rack assembly, the bottom centre position being put into pressure-bearing cylinder barrel；Second step, switching on power, the piston rod of the piston rod and the 3rd hydraulic cylinder that operate second hydraulic cylinder synchronously stretches out, until its Respective end face is in contact with true triaxial experiment box, completes to the spacing of true triaxial experiment box；Start monitoring device, while read, store the initial value of following instrument：It is separately mounted to first, the three, the 4th length Pressure sensor on cube briquetting and true triaxial pressure chamber cover, it is separately mounted to the work of first, second, and third hydraulic cylinder LVDT displacement transducers on stopper rod, the temperature sensor on true triaxial pressure chamber inwall, and installed in true triaxial Test the D07-11CM type gas mass flow gauge or DMF-1 series of fluids quality on the external pipeline of box gas exhaust pipe mouth Flowmeter；3rd step, experimental procedure：Cover the cover of pressure-bearing cylinder barrel, open inlet valve, the closure jackscrew of removal steam vent, closing draining valve；Then, start oil feed pump, hydraulic oil is slowly injected into pressure-bearing cylinder barrel；Entertain and be already filled with hydraulic oil in cylinder pressure cylinder, arrange Stomata screws on jackscrew and blocks steam vent there is no during gas discharge；Oil feed pump opening is kept, so that hydraulic fluid pressure reaches and is maintained at setting pressure in pressure-bearing cylinder barrel；Thermostatic control system is opened, by hydraulic fluid temperature control in pressure-bearing cylinder barrel in design temperature；Then, device in Gas air-supplying valve is opened, by the pressure regulation valve regulation on device in Gas supply air line to setting value, and keeps gas The supply gas pressure of gas is constant；After the device in Gas flowmeter registration on gas exhaust piping is in stable state, the drain tap on closing gas exhaust piping, and Continue to keep device in Gas air-supplying valve to be in opening, so that test specimen is in the dynamic balance state of an adsorption and desorption, 24 hours and then open gas exhaust piping on drain tap；After gas flowmeter registration is again at stable state, to hydraulic oil pressure force value in pressure-bearing cylinder barrel, first hydraulic cylinder The extruding force numerical value of the piston rod of the extruding force numerical value of piston rod, the piston rod of second hydraulic cylinder and the 3rd hydraulic cylinder carries out continuous Change dynamic regulation, during regulation：The extruding force of the piston rod of the piston rod of second hydraulic cylinder and the 3rd hydraulic cylinder is adjusted in synchronism, To ensure the symmetry of test specimen loading, and above-mentioned second hydraulic cylinder piston rod and the 3rd hydraulic cylinder piston rod are applied on test specimen Extruding force is more than hydraulic oil pressure force value in pressure-bearing cylinder barrel；Test specimen is treated under the piston rod extruding of first hydraulic cylinder, during by overall shear failure, the loading of first hydraulic cylinder piston rod Process is completed；In above-mentioned whole experiment process, monitoring system monitored over time, record by each instrument be transmitted back to Lai information, these information Include test specimen stress, displacement vector, the piston rod force size of each hydraulic cylinder, temperature, the pressure of methane gas, flow number According to and above-mentioned each data situation of change.
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| CN105784559A (en) * | 2016-03-03 | 2016-07-20 | 山东科技大学 | True triaxial fluid-structure interaction coal body seepage test device |
| CN110542614A (en) * | 2019-10-09 | 2019-12-06 | 中国矿业大学(北京) | True triaxial experiment device and method with CT real-time scanning based on water seepage |
| CN112881151B (en) * | 2021-01-14 | 2023-01-31 | 淮阴工学院 | True triaxial coal rock fluid-solid coupling test device |
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| CN2527707Y (en) * | 2002-02-07 | 2002-12-25 | 西南石油学院 | High temp. high pressure porous medium model |
| CN201765159U (en) * | 2010-09-16 | 2011-03-16 | 重庆大学 | Gas-contained coal-rock meso shearing test device |
| CN102507307A (en) * | 2011-10-28 | 2012-06-20 | 西安理工大学 | Sealing device for pressure chamber of true triaxial apparatus |
| CN103743633A (en) * | 2014-01-24 | 2014-04-23 | 重庆大学 | Fluid structure interaction coal rock shear-seepage test device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2527707Y (en) * | 2002-02-07 | 2002-12-25 | 西南石油学院 | High temp. high pressure porous medium model |
| CN201765159U (en) * | 2010-09-16 | 2011-03-16 | 重庆大学 | Gas-contained coal-rock meso shearing test device |
| CN102507307A (en) * | 2011-10-28 | 2012-06-20 | 西安理工大学 | Sealing device for pressure chamber of true triaxial apparatus |
| CN103743633A (en) * | 2014-01-24 | 2014-04-23 | 重庆大学 | Fluid structure interaction coal rock shear-seepage test device |
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