CN105004600B - Heat flow piercement coal body true triaxial shears seepage experimental apparatus sample apparatus for placing assembly - Google Patents
Heat flow piercement coal body true triaxial shears seepage experimental apparatus sample apparatus for placing assembly Download PDFInfo
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- CN105004600B CN105004600B CN201510409968.4A CN201510409968A CN105004600B CN 105004600 B CN105004600 B CN 105004600B CN 201510409968 A CN201510409968 A CN 201510409968A CN 105004600 B CN105004600 B CN 105004600B
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Abstract
Seepage experimental apparatus sample apparatus for placing assembly is sheared the invention discloses a kind of heat flow piercement coal body true triaxial, it is on the basis of existing technology, by using the true triaxial experiment box of Split type structure form, the rubber pallet of the special structure form adaptable with experiment box, and the rack assembly with slidable connection structure type, so that in test specimen detrusion operation is carried out, it will be substantially improved in terms of authenticity, accuracy and the reliability of simulation, and be easy to monitoring；Seepage experimental apparatus is sheared using the heat flow piercement coal body true triaxial of the sample apparatus for placing assembly 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.
Description
Technical field
Seepage apparatus, more particularly to a kind of heat flow piercement are sheared the present invention relates to a kind of heat flow piercement coal body true triaxial
Coal body true triaxial shears seepage experimental apparatus sample apparatus for placing assembly.
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 the test specimen used, which holds experiment box,
Body formula structure, and situation of the simplex method to stress is only only accounted for, during its experiment, to the shear action produced 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 it can not carry out watt
, there is larger use limitation in the research of this gas, it is impossible to which the seepage flow situation to coal body carries out comprehensive, systematic research.
The content of the invention
It is an object of the present invention to provide a kind of simple in construction, regulation is easy, it is adaptable to which heat flow piercement coal body true triaxial is cut
Cut the sample apparatus for placing assembly of seepage experimental apparatus.
The present invention is to achieve the above object the technical scheme adopted is that a kind of shearing of heat flow piercement coal body true triaxial is oozed
Flow experimental provision sample apparatus for placing assembly, it is characterised in that including a rack assembly and true triaxial experiment box；It is described
True triaxial tests box for split-type structural, including two experiment boxes, and this two experiment box one the first from left are right, face-to-face, with respective
The mode that head is fitted with the afterbody of other side, is placed in the rack assembly into rotationally symmetrical, by the rack assembly
Grip, shape is integral, be 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；
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 that two cylindrical columns, two vertical edges are
Section is 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 two ends of the cylindrical column are passed from the through-hole in corresponding square column respectively,
And be 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, longitudinal neck inserted with a bar shaped inserted block, 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 sample apparatus for placing assembly also includes rubber pallet, and the rubber pallet is integral type structure, including two
Section, one section therein 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
Bar is respectively by the corresponding outward flange boundary line in open portion of the box, along towards the outside extended line in that side of the end-plate-free of box
On direction, extension is formed；
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；
Above-mentioned two on rotationally symmetrical experiment box that face bonded to each other, the second through hole vertically on
On the extended line direction in two longitudinal edge boundary lines, the sealing groove matched 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 is abutted, also
Gas gas water access way is offered respectively, and one end of the gas gas water access way is connected with above-mentioned second through hole, separately
One end is to be arranged on the connection mouth of pipe of experiment box outwardly on the wall of side；
Above-mentioned two gas gas water access way one be import, another be outlet, pass through flexible pipe and the heat respectively
Fluid media on fluid structurecoupling coal body true triaxial shearing seepage experimental apparatus pressure-bearing cylinder barrel enters the mouth of pipe and fluid media is discharged
Ferrule is connected, the fluid media enter the mouth of pipe and fluid media discharge respectively with watt supporting outside experimental provision
This gas water generating means and gas gas water reception device are connected by fluid media pipeline；
The box position of above-mentioned two rubber pallet surrounds to place in the cavity of a hexahedral shape, the cavity and used jointly
The test specimen of Seepage Experiment is sheared in heat flow piercement coal body true triaxial；
The appearance and size of the test specimen matches with the cavity, when test specimen is put such as the cavity inside, test specimen and cavity
Each wall of surrounding formation interference fits.
Preferably, the gap is more than 30mm.
Further preferably, the material of above-mentioned rubber pallet is IIR butyl rubbers.
Further preferably, the thickness of above-mentioned rubber pallet is more than 10mm.
Further preferably, above-mentioned heat flow piercement coal body true triaxial shearing seepage experimental apparatus and hydraulic station, detecting system
Support the use, it includes frame, the first hydraulic jack, second hydraulic cylinder, the 3rd hydraulic cylinder and true triaxial pressure chamber；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 formation 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 is face-flange structure, and O-ring seal is provided between the cover and pressure-bearing cylinder barrel, and solid by bolt
Fixed connection；
The center position of bottom plate one side upward, 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, is respectively symmetrically provided with a connection mouth of pipe, the company
Adapter 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 is arranged into the mouth of pipe and a fluid media
Outlet spout；
One the first from left is right is bolted on the pressure-bearing cylinder respectively for the cylinder seat of the second hydraulic cylinder and the 3rd hydraulic cylinder
At the flange face flange 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；
The working end of the piston rod of the first hydraulic cylinder and the piston rod of second hydraulic cylinder, is respectively 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
Face is provided with the 3rd rectangular-shape briquetting formation slidable connection of fin；
The first through hole and shape, the size of the first rectangular-shape briquetting match；
Shape, the chi of second through hole respectively with each self-corresponding 4th rectangular-shape briquetting and the 3rd cuboid briquetting
It is very little to match；
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；
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；
Enter with above-mentioned fluid media on the fluid media pipeline between the mouth of pipe and device in Gas/water generating device and tune is installed
In pressure valve, with the fluid media pipeline of above-mentioned fluid media discharge and gas gas water reception device, be provided with device in Gas/
Water ga(u)ge；
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.
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 second hydraulic cylinder and the piston rod and the pressure-bearing cylinder barrel left and right sidewall of the 3rd hydraulic cylinder
Sealed with Glais ring.
The technical effect directly brought by the technical proposal is that, experimental result is true, accurate, reliable；And whole experiment dress
Put simple in construction, flexible adjustment 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 the way of being fitted by respective head with the afterbody of other side, it is placed on into rotationally symmetrical in the rack assembly, by
The rack assembly is gripped, 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 with the piston rod of first hydraulic cylinder downwards produced by shape, in turn results in the actual suffered active force of test specimen
Size distortion, misalignment (that is, " active force " on the active force and actual transfer to test specimen of the application detected size therebetween
Distortion, misalignment).
Moreover, " in the vertical direction, above-mentioned two tests the upper and lower side of the end of box respectively with the rack assembly
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, can vertically occur relative (dislocation) displacement between left side experiment box and right side experiment box.That is, if
The test specimen in the chamber for testing the hexahedral shape that box is surrounded jointly in the left and right sides is put, will occur detrusion trend 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, it will be substantially improved in terms of authenticity, accuracy and the reliability of simulation, and monitoring of being more convenient for.
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
The corresponding outward flange boundary line in 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 more reasonable, group of true triaxial experiment box
Dress more facilitates；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 is provided, and is transferred to by the rubber support disk left and right sides on test specimen.Because the favorable elasticity of quality of rubber materials is deformed
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 tests box this contact bonded to each other at two when being assembled integrally
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, respectively it is welded with a longitudinal neck, longitudinal neck 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 that the first neck and surface are provided with 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, in test specimen is in initial reference position, moves downward deviation reference position, whole motion process, the 3rd hydraulic pressure
Extruding force of the piston rod of cylinder from right to left on direction can be consistent all the time, 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 is used so that each force and movement under force executing agency are mutually coordinated, phase
Interworking unification is caused, organically unified overall as one, effectively further ensure that the authenticity and accuracy of experimental result.
In above-mentioned technical proposal, gap is more than 30mm.The reason for this is that generally, the raw coal (rock) or moulded coal used
The appearance and size of standard specimen is 200 × 100 × 100mm, and practical experience is proved, when test specimen is because of failure by shear, right side experiment
The downward relative shift of box is respectively less than 30mm.Therefore, it is 30mm by above-mentioned Interval selecting, it is compacter in structure, reasonable.
In above-mentioned technical proposal, sealed between the piston rod and cover of the first hydraulic jack using hole with Glais ring；Second
Sealed between hydraulic cylinder and the piston rod and the pressure-bearing cylinder barrel left and right sidewall of the 3rd hydraulic cylinder using hole with Glais ring., this
Sample, it can be ensured that pressure-bearing cylinder barrel this closed container stable working state with pressure, reliable.
In above-mentioned technical proposal, the material of rubber pallet is IIR butyl rubbers.It has the technical effect that, by rubber pallet
Material is preferably IIR butyl rubbers, primary concern is that, IIR butyl rubbers have good chemical stability and heat endurance,
Excellent air-tightness and watertightness, and oil resistivity is good, is particularly suitable for its specifically used operating mode.
In above-mentioned technical proposal, the thickness of rubber pallet is more than 10mm.Reason is, it has been experienced that, rubber pallet
Thickness is more than 10mm, it is ensured that its own has intensity that is certain, being easy to experimental implementation；Also, thickness is more than 10mm,
Its not cracky can be ensured, with good service life.
To more fully understand the present invention, the following detailed description of the heat flow piercement for being configured with said sample apparatus for placing assembly
Coal body true triaxial shears the experimental method of seepage experimental apparatus.
The experiment of seepage experimental apparatus is sheared using the heat flow piercement coal body true triaxial of this sample apparatus for placing assembly
Method,
It is characterised in that it includes 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 are assembled respectively with two experiment boxes；
Then, the preservative film on test specimen is removed, it is uniform respectively on four walls of the front, rear, left and right of test specimen to smear one
Thickness about 0.5mm 704 silica gel；
After silica gel condenses, the hexahedral shape that the box position that test specimen is placed on into two rubber pallets is surrounded jointly
In cavity, and whole test specimen apparatus for placing is assembled in place by rack assembly, be put into the bottom centre position in pressure-bearing cylinder barrel
Put；
Second step, switches on power, and operates the piston rod of second hydraulic cylinder and the piston rod of the 3rd hydraulic cylinder synchronously to stretch out, directly
To its each end face and true triaxial experiment box be in contact, complete to test the spacing of box to true triaxial；
Start monitoring device, while reading, storing 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 systems on the external pipeline of triaxial tests box gas exhaust/drain pipe port
Row liquid mass flow meter；
3rd step, experimental procedure：
The cover of pressure-bearing cylinder barrel is covered, inlet valve, the closure jackscrew of removal steam vent is opened, closes draining valve；
Then, start oil feed pump, hydraulic oil is slowly injected into pressure-bearing cylinder barrel；Entertain cylinder pressure cylinder in be already filled with hydraulic pressure
Oil, steam vent 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, gas gas water air-supplying valve is opened, by the pressure regulation valve regulation on gas gas water supply air line to setting value,
And keep the supply gas pressure of gas gas water constant；
After the device in Gas on exhaust/discharge pipe line/water ga(u)ge registration is in stable state, exhaust/drainpipe is closed
Exhaust/water discharging valve on road, and continue to keep gas gas water air-supplying valve to be in opening, so that test specimen is in one
The dynamic balance state of adsorption and desorption, after 24 hours, then opens exhaust/water discharging valve on exhaust/discharge pipe line；
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 to complete；
In above-mentioned whole experiment process, monitoring system monitored over time, record by each instrument be transmitted back to Lai information, these
Information includes piston rod force size, temperature, the pressure of device in Gas/water body of test specimen stress, displacement vector, each hydraulic cylinder
The situation of change of power, data on flows 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, the multiple functional of heat flow piercement coal body true triaxial shearing seepage experimental apparatus is caused, simple in construction, layout is closed
Reason, easy to operate, flexible adjustment；
2nd, seepage experimental apparatus is sheared using the heat flow piercement coal body true triaxial of the present invention, is carrying out heat flow piercement coal
During body shearing Seepage Experiment, it is while vertical direction applies active force, in the horizontal direction with fore-and-aft direction (front and back
Into by pressure-bearing cylinder barrel hydraulic oil transmission pressure) on also apply active force, realize truly " three axles " force, because
But " true triaxial ".
3rd, seepage experimental apparatus is sheared using the heat flow piercement coal body true triaxial of the present invention, is carrying out simulated experiment process
In, its fidelity is high, and testing result is true, accurate, good reliability.
Brief description of the drawings
Fig. 1 illustrates for the overall axle geodesic structure of the heat flow piercement coal body true triaxial shearing seepage experimental apparatus of the present invention
Figure；
Fig. 2 is true triaxial pressure chamber internal structure schematic diagram of the invention (not including pressure-bearing cylinder shell)；
Fig. 3 is experiment box axle geodesic structure schematic diagram of the invention；
Fig. 4 is the present invention looks up structural representation for testing box of the 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 sample apparatus for placing assembly of the present invention；
Fig. 7 is the side structure schematic view of the sample apparatus for placing assembly 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, heat flow piercement coal body true triaxial of the invention shearing seepage experimental apparatus is held with sample
Assembly of devices, it is characterised in that the heat flow piercement coal body true triaxial shearing seepage experimental apparatus and hydraulic station 6, detection system
Set 7 under unified central planning is used, and it includes frame 2, the first hydraulic jack 5, second hydraulic cylinder 3, the 3rd hydraulic cylinder 4 and true triaxial pressure chamber 1；
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 formation 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 is face-flange structure, and O-ring seal is provided between above-mentioned cover and pressure-bearing cylinder barrel, and solid by bolt
Fixed connection；
The center position of above-mentioned bottom plate one side upward, 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, is respectively symmetrically provided with a connection mouth of pipe, above-mentioned company
Adapter mouth outer end outwards turns down to form a flange face flange；
One the first from left is right is bolted on above-mentioned pressure-bearing respectively for the cylinder seat of the above-mentioned hydraulic cylinder 4 of second hydraulic cylinder 3 and the 3rd
At the flange face flange 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 one exhaust/osculum are opened up on above-mentioned cover respectively, above-mentioned fuel feed hole is external by hydraulic oil pipe
The hydraulic oil delivery pump of above-mentioned hydraulic station；
Inlet valve is installed on above-mentioned hydraulic oil pipe；Internal thread is provided with above-mentioned exhaust/osculum inwall, and passes through a top
Silk closure；
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, said sample apparatus for placing assembly, including a rack assembly 10 and true triaxial experiment
Box 8；Above-mentioned true triaxial tests box for split-type structural, including two experiment boxes, and this two experiment box one the first from left are right, face-to-face,
In the way of being fitted by respective head with the afterbody of other side, it is placed on into rotationally symmetrical in above-mentioned rack assembly, by above-mentioned branch
Frame sub-assembly is gripped, and 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 that two cylindrical columns, two vertical edges are
Section is 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 two ends of above-mentioned cylindrical column are passed from the through-hole in corresponding square column respectively,
And be 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, respectively it is welded with a longitudinal neck 302, above-mentioned longitudinal neck 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, rectangular cross-section first through hole 202, 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, is respectively 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
Face is provided with the 3rd rectangular-shape briquetting formation slidable connection of fin；(not shown)
Above-mentioned first through hole and shape, the size of above-mentioned first rectangular-shape briquetting match；
Shape, the chi of above-mentioned second through hole respectively with each self-corresponding 4th rectangular-shape briquetting and the 3rd cuboid briquetting
It is very little to match；
As shown in figure 5, said sample apparatus for placing assembly 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 and is parallel to each other
Rubber strip 206, every rubber strip respectively by the corresponding outward flange boundary line in open portion of above-mentioned box, along towards box end-plate-free
On the outside extended line direction in that side, extension is formed；
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, above-mentioned two on rotationally symmetrical experiment box that face 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
Sealing groove 205；
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, also offer gas gas water access way 203 respectively, one end of above-mentioned gas gas water access way with it is upper
The connection of the second through hole is stated, the other end is to be arranged on the connection mouth of pipe 204 of experiment box outwardly on the wall of side；
Above-mentioned two gas gas water access way one be import, another be outlet, pass through flexible pipe and above-mentioned stream respectively
Body 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 pipe
Mouth respectively with supporting device in Gas/water generating device 12 (as shown in Figure 2) outside experimental provision and gas gas water reception device
(not shown) is connected by fluid media pipeline；
The box position of above-mentioned two rubber pallet surrounds to place in the cavity of a hexahedral shape, above-mentioned cavity and used jointly
The test specimen of Seepage Experiment is sheared in heat flow piercement coal body true triaxial；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 formation interference fits of surrounding of test specimen and cavity；
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；
Enter with above-mentioned fluid media on the fluid media pipeline between the mouth of pipe and device in Gas/water generating device and tune is installed
In pressure valve, with the fluid media pipeline of above-mentioned fluid media discharge and gas gas water reception device, be provided with device in Gas/
Water ga(u)ge；
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 above-mentioned second hydraulic cylinder and the piston rod and above-mentioned pressure-bearing cylinder barrel left and right sidewall of 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, the following detailed description of the heat flow piercement for being configured with said sample apparatus for placing assembly
Coal body true triaxial shears the experimental method of seepage experimental apparatus.
The experiment of seepage experimental apparatus is sheared using the heat flow piercement coal body true triaxial of this sample apparatus for placing assembly
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,
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 are assembled respectively with two experiment boxes；
Then, the preservative film on test specimen is removed, it is uniform respectively on four walls of the front, rear, left and right of test specimen to smear one
Thickness about 0.5mm 704 silica gel；
After silica gel condenses, the hexahedral shape that the box position that test specimen is placed on into two rubber pallets is surrounded jointly
In cavity, and whole test specimen apparatus for placing is assembled in place by rack assembly, be put into the bottom centre position in pressure-bearing cylinder barrel
Put；
Second step, switches on power, and operates the piston rod of second hydraulic cylinder and the piston rod of the 3rd hydraulic cylinder synchronously to stretch out, directly
To its each end face and true triaxial experiment box be in contact, complete to test the spacing of box to true triaxial；
Start monitoring device, while reading, storing 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 systems on the external pipeline of triaxial tests box gas exhaust/drain pipe port
Row liquid mass flow meter；
3rd step, experimental procedure：
The cover of pressure-bearing cylinder barrel is covered, inlet valve, the closure jackscrew of removal steam vent is opened, closes draining valve；
Then, start oil feed pump, hydraulic oil is slowly injected into pressure-bearing cylinder barrel；Entertain cylinder pressure cylinder in be already filled with hydraulic pressure
Oil, steam vent 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, gas gas water air-supplying valve is opened, by the pressure regulation valve regulation on gas gas water supply air line to setting value,
And keep the supply gas pressure of gas gas water constant；
After the device in Gas on exhaust/discharge pipe line/water ga(u)ge registration is in stable state, exhaust/drainpipe is closed
Exhaust/water discharging valve on road, and continue to keep gas gas water air-supplying valve to be in opening, so that test specimen is in one
The dynamic balance state of adsorption and desorption, after 24 hours, then opens exhaust/water discharging valve on exhaust/discharge pipe line；
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 to complete；
In above-mentioned whole experiment process, monitoring system monitored over time, record by each instrument be transmitted back to Lai information, these
Information includes piston rod force size, temperature, the pressure of device in Gas/water body of test specimen stress, displacement vector, each hydraulic cylinder
The situation of change of power, data on flows and above-mentioned each data.
Claims (6)
1. a kind of heat flow piercement coal body true triaxial shears seepage experimental apparatus sample apparatus for placing assembly, it is characterised in that
Including a rack assembly and true triaxial experiment box；The true triaxial tests box for split-type structural, including two experiment boxes,
This two experiment box one the first from left are right, face-to-face, in the way of being fitted by respective head with the afterbody of other side, placed into rotationally symmetrical
In the rack assembly, gripped by the rack assembly, shape is integral, be placed on the heat flow piercement coal
The center of the pressure-bearing cylinder barrel bottom of body true triaxial shearing seepage experimental apparatus；
In the vertical direction, the end of above-mentioned two experiment box retains between the upper and lower frame of the rack assembly respectively
Certain gap；
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 that 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 two ends point of the square column
A through-hole is not offered, and the two ends of the cylindrical column are passed from the through-hole in corresponding square column respectively, and are led 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,
Respectively it is welded with a longitudinal neck, longitudinal neck 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 sample apparatus for placing assembly 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 is two rubber strips for being parallel to each other, every rubber strip point
Not by the corresponding outward flange boundary line in open portion of the box, along towards the outside extended line direction in that side of the end-plate-free of box
On, extension is formed；
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；
Above-mentioned two on rotationally symmetrical experiment box that face bonded to each other, the second through hole vertically on two indulge
To on the extended line direction of boundary line, the sealing groove matched 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 is abutted, also distinguish
Gas gas water access way is offered, one end of the gas gas water access way is connected with above-mentioned second through hole, the other end
To be arranged on the connection mouth of pipe of experiment box outwardly on the wall of side；
Above-mentioned two gas gas water access way one be import, another be outlet, consolidated respectively by flexible pipe and the hot-fluid
The fluid media coupled on coal body true triaxial shearing seepage experimental apparatus pressure-bearing cylinder barrel enters the mouth of pipe and fluid media discharge
Be tightly connected, the fluid media enter the mouth of pipe and fluid media discharge respectively with gas supporting outside experimental provision
Gas water generating means and gas gas water reception device are connected by fluid media pipeline；
The box position of above-mentioned two rubber pallet is surrounded jointly places in the cavity of a hexahedral shape, 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, when test specimen is put into the cavity inside, and the four of test specimen and cavity
Week, each wall formed interference fits.
2. heat flow piercement coal body true triaxial shearing seepage experimental apparatus according to claim 1 is total with sample apparatus for placing
Into, it is characterised in that the gap is more than 30mm.
3. heat flow piercement coal body true triaxial shearing seepage experimental apparatus according to claim 1 is total with sample apparatus for placing
Into, it is characterised in that the material of the rubber pallet is IIR butyl rubbers.
4. heat flow piercement coal body true triaxial shearing seepage experimental apparatus according to claim 1 is total with sample apparatus for placing
Into, it is characterised in that the thickness of the rubber pallet is more than 10mm.
5. held according to any described heat flow piercement coal body true triaxial shearing seepage experimental apparatus of claim 1-4 with sample
Assembly of devices, it is characterised in that the heat flow piercement coal body true triaxial shearing seepage experimental apparatus and hydraulic station, detecting system
Support the use, heat flow piercement coal body true triaxial shearing seepage experimental apparatus includes frame, the first hydraulic jack, the second hydraulic pressure
Cylinder, the 3rd hydraulic cylinder and true triaxial pressure chamber；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
Cover is stated for face-flange structure, 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, 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
The centre bore that Nogata is opened up to being each passed through on the top plate and the cover, and extend into the pressure-bearing cylinder barrel；
Both sides waist in the same level height of the pressure-bearing cylinder barrel, is respectively symmetrically 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, a fluid media is also respectively provided with into the mouth of pipe and a fluid media discharge pipe
Mouthful；
One the first from left is right is bolted on the pressure-bearing cylinder barrel waist respectively for the cylinder seat of the second hydraulic cylinder and the 3rd hydraulic cylinder
At the flange face flange 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；Institute
The bottom for stating pressure-bearing cylinder barrel is additionally provided with an outage, and the outage is connected by oil exit pipe with outside oil storage fuel tank,
Draining valve is installed on oil exit pipe；
The working end of the piston rod of the first hydraulic cylinder and the piston rod of second hydraulic cylinder, is respectively fixedly connected with the first length
Cube 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 is set by first neck with surface
It is equipped with the 3rd rectangular-shape briquetting formation slidable connection of fin；
The first through hole and shape, the size of the first rectangular-shape briquetting match；
Shape, the size phase of second through hole respectively with each self-corresponding 4th rectangular-shape briquetting and the 3rd cuboid briquetting
Matching；
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；
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；
Enter with above-mentioned fluid media on the fluid media pipeline between the mouth of pipe and device in Gas/water generating device and pressure regulation is installed
On valve, with above-mentioned fluid media discharge and the fluid media pipeline of gas gas water reception device, gas gas water is installed
Flowmeter；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.
6. heat flow piercement coal body true triaxial shearing seepage experimental apparatus according to claim 5 is total with sample apparatus for placing
Into, it is characterised in that sealed between the piston rod and cover of first hydraulic jack using hole with Glais ring；
Hole lattice are used between the second hydraulic cylinder and the piston rod and the pressure-bearing cylinder barrel left and right sidewall of the 3rd hydraulic cylinder
Lai Quan is sealed.
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| CN201510409968.4A CN105004600B (en) | 2015-07-14 | 2015-07-14 | Heat flow piercement coal body true triaxial shears seepage experimental apparatus sample apparatus for placing assembly |
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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 |
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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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