CN207730543U - Test piece fixing device for rock burst experiment - Google Patents
Test piece fixing device for rock burst experiment Download PDFInfo
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- CN207730543U CN207730543U CN201721803132.3U CN201721803132U CN207730543U CN 207730543 U CN207730543 U CN 207730543U CN 201721803132 U CN201721803132 U CN 201721803132U CN 207730543 U CN207730543 U CN 207730543U
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Abstract
The utility model provides a kind of test piece fixing device for rock burst experiment, include for install and fix the test specimen box of test specimen, for test specimen transmit load and can freely falling body make the first briquetting and oil cylinder for lifting first briquetting that test specimen forms the scope of freedom；The test specimen box is rectangular parallelepiped structure, and the opposed side hollow out of two of which of the test specimen box is both provided with through-hole on remaining four face, and the through hole is provided with the pressure transfer device for transmitting load to test specimen；First briquetting is set to the hollow out face of test specimen box during load, and one end of first briquetting is used to contact with test specimen extruding, and the other end of first briquetting is for directly bearing to load；The oil cylinder is set to the lower section of the first briquetting, and the direction of oil cylinder stroke is vertical direction.By way of the first briquetting freely falling body, test specimen is made to quickly form the scope of freedom, to solve the problems, such as that existing testing machine is difficult to so that test specimen quickly forms the scope of freedom.
Description
Technical field
The utility model is related to material mechanical performance testing equipment fields, and being applied to rock burst in particular to one kind tries
The test piece fixing device tested.
Background technology
Rock burst is a kind of unexpected fierce release of the flexible deformation potential energy built up in rock mass under certain condition, leads to rock
The phenomenon that bursting and ejecting is deep-buried underground engineering common power destruction phenomenon in the construction process, when gathering in rock mass
When long-pending high elastic strain can be more than the energy that the rock failure mechanism of rock is consumed, the balance of rock mass structure is destroyed, extra energy is led
Rock explosion is caused, so that carg is removed from rock mass, collapses.
Since rock burst directly threatens the safety of construction personnel and equipment in underground engineering, domestic and international researcher is to rock burst
It conducts extensive research.In the lab, usually six face of three-dimensional is carried out to rock sample using true triaxial test equipment to load
And unidirectional unloading, so that the energy gathered in sillar is discharged suddenly, rock burst occurs and destroys.Existing rock burst testing machine is due to it
The structure of test piece fixing device limits, and unidirectionally unloads moment in rock burst testing machine, rock sample is difficult to quickly form the scope of freedom, make
The Loading pathj and the Loading pathj of true rock burst for obtaining rock sample not fully coincide, and leading to test result, there are larger mistakes
Difference.
Utility model content
The purpose of this utility model is to provide a kind of test piece fixing device for rock burst experiment, the test piece fixing device
Moment is unidirectionally unloaded in rock burst testing machine, the uninstall direction of rock sample can be made to quickly form the scope of freedom, and then improve to true
The simulation degree of rock burst reduces test error.
To achieve the goals above, the utility model provides following technical scheme：A kind of test specimen for rock burst experiment is solid
Determine device, include for install and fix the test specimen box of test specimen, for test specimen transmit load and can freely falling body make test specimen shape
At first briquetting on the scope of freedom and the oil cylinder for lifting first briquetting；
The test specimen box be rectangular parallelepiped structure, the opposed side hollow out of two of which of the test specimen box, remaining four
Through-hole is both provided on face, the through hole is provided with the pressure transfer device for transmitting load to test specimen；Institute during load
The hollow out face that the first briquetting is set to test specimen box is stated, one end of first briquetting is used to contact with test specimen extruding, and described first
The other end of briquetting is for directly bearing to load；The oil cylinder is set to the lower section of the first briquetting, and the direction of oil cylinder stroke is perpendicular
Directly upwards or straight down.
Before rock burst experiment, test specimen is fixed first with the test specimen box, oil cylinder lifts first briquetting to height of specimen.
During rock burst is tested, the loading device of rock burst testing machine is pressed in four pressure transfer devices and two opposed first briquettings in advance
When upper, the frictional force between the first briquetting and test specimen and loading device can balance the dead weight of the first briquetting；It is subsequently used for lifting
The oil cylinder of one briquetting declines, and is detached from the first briquetting；The loading device acted at this time on the first briquetting unloads rapidly, and leaves
First briquetting, then the first briquetting, which understands freely falling body, makes test specimen form the scope of freedom.By way of the first briquetting freely falling body, make examination
Part quickly forms the scope of freedom, and the spacing at this time between test specimen and loading device is enough, does not influence test piece deformation and rock burst.To
Solve the problems, such as that existing testing machine is difficult to so that test specimen quickly forms the scope of freedom.
Further, the displacement sensor for measuring oil cylinder stroke is provided on the oil cylinder；The piston of the oil cylinder
Horizontal support plate is provided at the top of bar, the support plate is used to support the first briquetting, and the first briquetting is made to be horizontal；
At least two axis pins straight up is provided in the support plate, the bottom of first briquetting is provided with the corresponding axis pin
Pin hole；When the first briquetting of oil cylinder supporting, support plate supports the first briquetting, and axis pin is inserted into pin hole.Pass through displacement sensor
Setting accurately controls oil cylinder stroke, and then controls the height error between the first briquetting and test specimen；Pass through setting for support plate
It sets, the first briquetting can be made to keep horizontality；By the setting of at least two axis pins and pin hole, can be used for positioning the first briquetting,
Prevent the offset and rotation of the first briquetting generation all around.
Further, the one side that first briquetting directly bears load is indent hemisphere face structure.By the way that first is pressed
The face of block is designed as indent hemisphere face structure, while the acting surface of loading device is designed as evagination hemisphere face structure, passes through
The self-centering design of spherical surface, can compensate for the non-perpendicularity error of loading direction and the first briquetting surface, be conducive to reduce load
The load eccentricity degree of period.
Preferably, the spherical surface depth of the indent hemisphere face structure is 3~4mm.When loading device traveling speed be 5~
10mm/s, and the spherical surface depth of the indent hemisphere face structure be 3~4mm when, the first briquetting falls to what test specimen was completely exposed
Time is about 200ms.
Further, the pressure transfer device includes pressure head, last item and the second briquetting；The pressure head is set to test specimen box
The outside in each face, second briquetting are set to the inside in each face of test specimen box；The last item by the through-hole on the test specimen box,
One end connects pressure head, and the other end connects the second briquetting；The pressure head passes sequentially through last item and second for directly bearing to load
Load is passed to test specimen by briquetting；Second briquetting is used to contact with test specimen extruding and fixed test specimen；
The pressure transfer device further includes guide rod, and the guide rod is fixed and perpendicular to the surface of test specimen box, the pressure head
On be provided with pilot hole corresponding with guide rod, the pressure head can be along the axial movement of the guide rod.By the setting of guide rod, make pressure
Head perpendicular to the direction on test specimen box surface only along moving, then the end face of the second briquetting is parallel with the surface of test specimen box without inclined
Tiltedly, and then ensure test specimen with respect to test specimen box not run-off the straight.
Further, the pressure transfer device further includes the first screw for pre-tightening test specimen, and first screw connects
The surface of test specimen box and the pressure head are connect, the gap during preload between pressure head and test specimen box surface is filled by cushion block.Pass through use
In the setting of the first screw, the first screw is pre-tightened before loading, during preload using the fixed cushion block filling pressure head of geomery with
Gap between test specimen box surface, the then distance of the pressure head of four direction and the second briquetting for being connect with pressure head apart from box surface
It is controlled by cushion block, and then ensures that the geometric center of test specimen is overlapped with the geometric center of test specimen box.
Further, the test piece fixing device for rock burst experiment further includes having test specimen mounting bracket, the test specimen peace
It shelves and is used to support and fixes the test specimen box, levelling device is provided between the test specimen box and test specimen mounting bracket.Pass through tune
The setting of leveling device, the height error for compensating test specimen mounting bracket, and then ensure that test specimen box is in horizontality before load.
Further, the test piece fixing device for rock burst experiment further includes the fixation for being useful for fixing the oil cylinder
Plate, the oil cylinder are secured by bolts in the fixed plate, and the fixed plate is fixed on the test specimen mounting bracket, described solid
It is provided with levelling device between fixed board and test specimen mounting bracket.By the setting of fixed plate, fixed plate can be used as the anti-of oil cylinder
Power fulcrum, while fixed plate can mitigate the larger compression bar amount of deflection that oil cylinder is generated because long range jacks.
Further, first briquetting is middle alloy high strength bloom body, and the surface of first briquetting is provided with
Carburized layer.By the setting of carburized layer, the case hardness of the first briquetting is improved, is avoided during the first briquetting freely falling body because touching
It hits testing machine other component and deforms.
Further, the lifting lug for lifting by crane test specimen box is provided on the top surface of the test specimen box.The setting of lifting lug is convenient
The test specimen box is loaded and unloaded in lifting.
Compared with prior art, the test piece fixing device described in the utility model for rock burst experiment has below beneficial to effect
Fruit：
1, using the free falling of briquetting, surface of test piece can be made to quickly form the scope of freedom, solves existing testing machine and is difficult to
So that test specimen quickly forms the problem of scope of freedom.Technical solution provided by the utility model makes simulation journey of the experiment to true rock burst
Higher is spent, and then conducive to diminution test error.
2, after briquetting is fallen, the spacing between test specimen and loading device is at least not less than the length of test specimen, and the spacing is not
Influence test piece deformation and rock burst.
Description of the drawings
It, below will be to required use in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing briefly introduce, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be seen
Work is the restriction to range, for those of ordinary skill in the art, without creative efforts, can be with
Other relevant drawings are obtained according to these attached drawings.
Fig. 1 show the structural schematic diagram of test specimen box described in the utility model.
Fig. 2 show the structural schematic diagram of the first briquetting described in the utility model.
Fig. 3 show the structural schematic diagram of oil cylinder described in the utility model.
Fig. 4 show the structural schematic diagram of the test piece fixing device described in the utility model for rock burst experiment.
Figure label explanation：
10- test specimen boxes；11- supporting racks；12- lifting lugs；The first briquettings of 20-；21- pin holes；30- oil cylinders；31- displacement sensings
Device；32- support plates；33- axis pins；40- pressure transfer devices；41- pressure heads；42- last items；The second briquettings of 43-；44- guide rods；46-
First screw；47- cushion blocks；50- test specimen mounting brackets；51- base plates；52- columns；60- levelling devices；70- fixed plates；80- is tried
Part.
Specific implementation mode
Below in conjunction with attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear
Chu completely describes.It should be appreciated that specific embodiment described herein is used only for explaining the utility model, it is not used to limit
Determine the utility model.Based on the embodiments of the present invention, those skilled in the art are in no creative work under the premise of institute
The every other embodiment obtained, belongs to the scope of protection of the utility model.
It please refers to Fig.1 to Fig.4, present embodiments provides a kind of test piece fixing device for rock burst experiment.The test specimen
The purpose of fixing device aims to solve the problem that existing testing machine is difficult to quickly form asking for the scope of freedom in unidirectionally unloading moment, rock sample
Topic.
The test piece fixing device includes test specimen box 10, the first briquetting 20 and oil cylinder 30.The test specimen box 10 is for installing
And fixed test specimen 80, first briquetting 20 be used for test specimen 80 transmit load and can freely falling body so that test specimen 80 is formed freedom
Face, the oil cylinder 30 are used in 20 the first briquetting of freely falling body front support 20 of the first briquetting.
The test specimen box 10 uses the opposed side hollow out of two of which, remaining circumferential closed structure type.Closing
Four faces on be both provided with through-hole, through hole is provided with pressure transfer device 40.The pressure transfer device 40 can be along vertical
It is moved in the direction on 10 surface of test specimen box, the loading device of testing machine directly acts on the pressure transfer device 40, the pressure
Load is passed to test specimen 80 by force transfering device 40.In addition, the pressure transfer device 40 is also by way of pre-tightening test specimen 80
To position test specimen 80.
The oil cylinder 30 selects servo hydraulic oil cylinder, the oil cylinder 30 to be set to the side-lower in hollow out face, oil cylinder before loading
30 piston rod heads on the 20 upward traveling of the first briquetting, and by the first briquetting 20 jacking to 80 height of test specimen, the first briquetting 20 with
Connection relation is had no between piston rod.During load, one end of first briquetting 20 is contacted with the extruding of test specimen 80, and the other end is used
In directly bearing to load.
When the loading device of rock burst testing machine is pressed in four pressure transfer devices 40 and two opposed first briquettings in advance
When on 20, the frictional force between the first briquetting 20 and test specimen 80 and loading device can balance the dead weight of the first briquetting 20；Then it uses
Decline in the oil cylinder 30 for lifting the first briquetting 20, is detached from the first briquetting 20；The load dress on the first briquetting 20 is acted at this time
Rapid unloading is set, and leaves the first briquetting 20, then the first briquetting 20 meeting freely falling body makes test specimen 80 form the scope of freedom.Pass through first
The mode of 20 freely falling body of briquetting makes test specimen 80 quickly form the scope of freedom, and the spacing between test specimen 80 and loading device at this time
Enough, the deformation of test specimen 80 and rock burst are not influenced.It is difficult to rapidly in unidirectionally unloading moment, test specimen 80 to solve existing testing machine
The problem of forming the scope of freedom.
In view of being loaded since the first briquetting 20 is used to transmit to test specimen 80, the position error of the first briquetting 20 can directly be led
It causes load eccentric, and then causes larger test error.The test specimen 80 for rock burst experiment that the present embodiment is provided thus is solid
Following 4 technical characteristics can also be had by determining device, to solve the orientation problem of the first briquetting 20.
1, the displacement sensor 31 for measuring 30 stroke of oil cylinder, as an example, institute's rheme are provided on the oil cylinder 30
Displacement sensor 31 selects magnetostrictive displacement sensor.Skilled addressee readily understands that, due to the magnetostriction position
Displacement sensor is applied to measure the prior art that oil cylinder stroke has been ripe, so being not described in detail.Pass through displacement sensor
31 setting accurately controls 30 stroke of oil cylinder, and then controls the height error between the first briquetting 20 and test specimen 80.
2, the piston rod top of the oil cylinder 30 is provided with the support plate 32 of horizontal T-type, and oil cylinder 30 lifts the first briquetting
When 20, the support plate 32 is used to support the first briquetting 20, and the first briquetting 20 is made to keep horizontality.
3, at least two axis pins 33 straight up is provided in the support plate 32, the bottom surface of first briquetting 20 is set
It is equipped with the pin hole 21 of the corresponding axis pin 33, when oil cylinder 30 lifts the first briquetting 20, axis pin 33 is inserted into pin hole 21.Axis pin 33 and pin
The setting in hole 21 prevents the offset and inclination of briquetting generation all around.
4, in addition, can also directly bear first briquetting 20 to load is designed as indent hemisphere face structure on one side.Phase
It is corresponding, while the acting surface of loading device is designed as evagination hemisphere face structure, it, can by the self-centering design of the spherical surface
The non-perpendicularity error of loading direction and 20 surface of the first briquetting is compensated, is conducive to reduce the load eccentricity degree during loading.It examines
The maximum traveling speed for considering existing loading device is 5~10mm/s, then the spherical surface depth of the indent hemisphere face structure is preferred
In 3~4mm, under the conditions of this, it is about 200ms that the time that test specimen 80 is completely exposed is offloaded to since loader.
In view of the position error due to test specimen 80, load bias is also resulted in, and then cause larger test error.
The test piece fixing device for rock burst experiment that the present embodiment is provided thus can also have following 3 technical characteristics, to solve
The orientation problem of test specimen 80.
1, as an example, the pressure transfer device 40 includes pressure head 41, last item 42 and the second briquetting 43.The pressure head 41
Cylindrical structure, the pressure head 41 are set to the outside of 10 4 sealing surfaces of test specimen box.Second briquetting 43 is for squeezing
Test specimen 80 and fixed test specimen 80 are contacted, the one side that second briquetting 43 is contacted with test specimen 80 is plane, second briquetting 43
It is set to the inside of 10 4 sealing surfaces of test specimen box.The last item 42 is cylindrical-shaped structure, is passed through on the test specimen box 10
Through-hole, one end are bolted with pressure head 41, and the other end is detachably connected by feather key and seam allowance with briquetting.The pressure
First 41 directly bear to load, and pass sequentially through last item 42 and load is passed to test specimen 80 by the second briquetting 43.
In addition, the pressure transfer device 40 further includes the guide rod 44 perpendicular to 10 surface of test specimen box, the guide rod 44 1
The surface of test specimen box 10 is fixed at end, and the other end is free.It is corresponding, pilot hole is provided on the pressure head 41, guide rod 44 is worn
Enter pilot hole, enable the sliding axially along the guide rod 44 of pressure head 41, so realize pressure transfer device 40 can along perpendicular to
Move this technical characteristic in the direction on 10 surface of test specimen box.Preferably, the guide rod 44 is cylindrical bar, and is not less than two.
By the setting of guide rod 44, make pressure head 41 only along being moved perpendicular to the direction on 10 surface of test specimen box, then the second briquetting
43 end face is parallel with the surface of test specimen box 10 without deflection, and then ensures that test specimen 80 does not incline with respect to test specimen box 10
Tiltedly.
In the present embodiment, the size of the test specimen 80 can be 50 × 50 × 100cm, 100 × 100 × 100cm or 100
Tri- kinds of specifications of × 100 × 200cm.The test specimen 80 of different size, the shape ruler of corresponding the first briquetting 20 and the second briquetting 43
It is very little also to differ.
2, on the basis of the example above, the pressure transfer device 40 further includes the first screw for pre-tightening test specimen 80
46.The first connecting hole, the inner wall smooth of the first connecting hole are begun on the pressure head 41.The surface of the test specimen box 10 offers
Second connecting hole, the second connecting hole are threaded hole.
The method for pre-tightening test specimen 80 is as follows：The first screw 46 is penetrated into the first, second connecting hole first, but is not screwed.So
The fixed cushion block of the shape specification of customization 47 is filled in the gap between 10 surface of pressure head 41 and test specimen box afterwards, and screws spiral shell
Nail.At this time due to the size Control of cushion block 47, make distance of the every piece of pressure head 41 on four sealing surfaces apart from 10 surface of test specimen box
Equal, then distance of every piece of second briquetting 43 apart from 10 surface of test specimen box is also equal, then is extruded among four piece of second briquetting 43
Test specimen 80 geometric center, overlapped with the geometric center of test specimen box 10.
3 and the present embodiment in, it is described for rock burst experiment test piece fixing device further include having test specimen mounting bracket 50.
As an example, the test specimen mounting bracket 50 includes the four columns 52 of base plate 51 and square distribution, the column 52
Bottom end is fixed on the base plate 51.Corresponding with four columns 52, the test specimen box 10 further includes having in right-angled intersection
The supporting rack 11 of structure, support frame as described above 11 are fixedly arranged at the bottom of box body, four ends difference of support frame as described above 11
It is connect with the top of four columns 52.It should be appreciated that the structure type of the test specimen mounting bracket 50 is not limited to above-mentioned act
Example, the structure type of the test specimen mounting bracket 50 can also have other selections, such as truss structure.
It is described in order to compensate for the height error since there may be height errors during installation for test specimen mounting bracket 50
Levelling device 60 is provided between test specimen box 10 and test specimen mounting bracket 50.In the present embodiment, the levelling device 60 is set to branch
Between the end and the top of column 52 of support 11.Skilled addressee readily understands that, the levelling device 60 is existing
Mature technology, so no longer its structure is described in detail.By the setting of levelling device 60, for compensating test specimen mounting bracket
50 height error, and then ensure that test specimen box 10 is in horizontality before load.
Based on the above technical solution, the test piece fixing device for rock burst experiment described in the present embodiment also wraps
Include the fixed plate 70 for being useful for fixing the oil cylinder 30.The both ends of the fixed plate 70 are separately fixed at the top of above-mentioned column 52
End, and the fixed plate 70 can carry out leveling using above-mentioned levelling device 60.Through-hole, through-hole week are offered in the fixed plate 70
Enclosing setting, there are four the first threaded holes；The cylinder barrel top of the oil cylinder 30 is provided with a circle curtain plate, is opened up on the curtain plate
There are four the second threaded holes.Cylinder barrel passes through through-hole, and using the first threaded hole and the second threaded hole is bolted, oil cylinder 30 is consolidated
It is scheduled in fixed plate 70.The fixed plate 70 can be used as the counter-force fulcrum of oil cylinder 30, while fixed plate 70 can mitigate oil cylinder
The 30 larger compression bar amounts of deflection generated because long range jacks.
Based on the fixed plate 70, the second guiding is provided in the support plate 32 of the T-type on 30 piston rod top of oil cylinder
Hole has been fixedly disposed the second guide rod in fixed plate 70, and the second guide rod is vertical with the surface of fixed plate 70.Second guide rod penetrates
Two pilot holes make support plate 32 that can ensure that the horizontality of support plate 32 along the axial movement of the second guide rod.
In view of the first briquetting 20 will produce freely falling body in rock burst experiment, and inevitably with testing machine other
Component mutually collides.So in the present embodiment, alloy high strength steel is made during first briquetting 20 can be selected, and described the
The surface of one briquetting 20 is provided with carburized layer.By the setting of carburized layer, the case hardness of the first briquetting 20 is improved, avoids
It deforms because of collision tester other component during one briquetting, 20 freely falling body.
In view of the weight of the test specimen box 10 additional examination part 80 is heavy, the test specimen box 10, this implementation are assembled and disassembled for convenience
In example, the lifting lug 12 for lifting by crane test specimen box 10 can be set on the top surface of the test specimen box 10.
Above description is only a specific implementation of the present invention, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art can readily occur in variation within the technical scope disclosed by the utility model
Or replace, should all it cover within the protection scope of the present utility model.
Claims (10)
1. a kind of test piece fixing device for rock burst experiment, which is characterized in that include the test specimen for installing and fixing test specimen
Box, for test specimen transmit load and can freely falling body make first briquetting on the test specimen formation scope of freedom and for lifting described the
The oil cylinder of one briquetting；
The test specimen box is rectangular parallelepiped structure, the opposed side hollow out of two of which of the test specimen box, on remaining four face
It is both provided with through-hole, the through hole is provided with the pressure transfer device for transmitting load to test specimen；Described during load
One briquetting is set to the hollow out face of test specimen box, and one end of first briquetting is used to contact with test specimen extruding, first briquetting
The other end for directly bearing to load；The oil cylinder is set to the lower section of the first briquetting, the direction of oil cylinder stroke be vertically to
Above or straight down.
2. being used for the test piece fixing device of rock burst experiment according to claim 1, which is characterized in that be provided on the oil cylinder
Displacement sensor for measuring oil cylinder stroke；Horizontal support plate, the branch are provided at the top of the piston rod of the oil cylinder
Fagging is used to support the first briquetting, and the first briquetting is made to be horizontal；Be provided in the support plate at least two vertically to
On axis pin, the bottom of first briquetting is provided with the pin hole of the corresponding axis pin；When the first briquetting of oil cylinder supporting, support plate
The first briquetting is supported, and axis pin is inserted into pin hole.
3. being used for the test piece fixing device of rock burst experiment according to claim 1, which is characterized in that first briquetting is direct
The one side for bearing load is indent hemisphere face structure.
4. being used for the test piece fixing device of rock burst experiment according to claim 3, which is characterized in that the indent hemisphere face knot
The spherical surface depth of structure is 3~4mm.
5. being used for the test piece fixing device of rock burst experiment according to claim 1, which is characterized in that the pressure transfer device
Including pressure head, last item and the second briquetting；The pressure head is set to the outside in each face of test specimen box, and second briquetting is set to test specimen
The inside in each face of box；For the last item by the through-hole on the test specimen box, one end connects pressure head, and the other end connects the second briquetting；
The pressure head passes sequentially through last item and load is passed to test specimen by the second briquetting for directly bearing to load；Second pressure
Block is used to contact with test specimen extruding and fixed test specimen；
The pressure transfer device further includes guide rod, and the guide rod is fixed on and on the surface of test specimen box, the pressure head
It is provided with pilot hole corresponding with guide rod, the pressure head can be along the axial movement of the guide rod.
6. being used for the test piece fixing device of rock burst experiment according to claim 5, which is characterized in that the pressure transfer device
Further include the first screw for pre-tightening test specimen, the surface of the first screw connection test specimen box and the pressure head, during preload
It is filled by cushion block in gap between pressure head and test specimen box surface.
7. being used for the test piece fixing device of rock burst experiment according to claim 6, which is characterized in that described to be tested for rock burst
Test piece fixing device further include having test specimen mounting bracket, the test specimen mounting bracket is used to support and fixes the test specimen box, described
It is provided with levelling device between test specimen box and test specimen mounting bracket.
8. being used for the test piece fixing device of rock burst experiment according to claim 7, which is characterized in that described to be tested for rock burst
Test piece fixing device further include the fixed plate for being useful for fixing the oil cylinder, the oil cylinder is secured by bolts in the fixation
On plate, the fixed plate is fixed on the test specimen mounting bracket, and leveling dress is provided between the fixed plate and test specimen mounting bracket
It sets.
9. being used for the test piece fixing device of rock burst experiment according to claim 1, which is characterized in that during first briquetting is
Alloy high strength bloom body, and the surface of first briquetting is provided with carburized layer.
10. being used for the test piece fixing device of rock burst experiment according to claim 1, which is characterized in that the top of the test specimen box
The lifting lug for lifting by crane test specimen box is provided on face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721803132.3U CN207730543U (en) | 2017-12-21 | 2017-12-21 | Test piece fixing device for rock burst experiment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721803132.3U CN207730543U (en) | 2017-12-21 | 2017-12-21 | Test piece fixing device for rock burst experiment |
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| Publication Number | Publication Date |
|---|---|
| CN207730543U true CN207730543U (en) | 2018-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721803132.3U Active CN207730543U (en) | 2017-12-21 | 2017-12-21 | Test piece fixing device for rock burst experiment |
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| CN (1) | CN207730543U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111077017A (en) * | 2019-12-30 | 2020-04-28 | 黑龙江科技大学 | Unilateral uninstallation coal seam gas outburst analogue means |
-
2017
- 2017-12-21 CN CN201721803132.3U patent/CN207730543U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111077017A (en) * | 2019-12-30 | 2020-04-28 | 黑龙江科技大学 | Unilateral uninstallation coal seam gas outburst analogue means |
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