CN113686695A - Rock friction test device - Google Patents
Rock friction test device Download PDFInfo
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- CN113686695A CN113686695A CN202110851920.4A CN202110851920A CN113686695A CN 113686695 A CN113686695 A CN 113686695A CN 202110851920 A CN202110851920 A CN 202110851920A CN 113686695 A CN113686695 A CN 113686695A
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- 238000012360 testing method Methods 0.000 title claims abstract description 60
- 239000011435 rock Substances 0.000 title claims abstract description 37
- 239000002775 capsule Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 11
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 239000000523 sample Substances 0.000 description 161
- 230000004913 activation Effects 0.000 description 8
- 239000010720 hydraulic oil Substances 0.000 description 8
- 239000003921 oil Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 3
- 238000004445 quantitative analysis Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a rock friction test device, and belongs to the technical field of rock friction. The rock friction test device includes: the device comprises a cylinder, a support column, a first loading shaft and a second loading shaft; the first square sample and the second square sample are arranged in the cylinder body, the first square sample and the second square sample are arranged in a staggered mode along a cross section layer, and an oil filling hole is formed in the cylinder body; the second square sample is arranged on the supporting column; the first loading shaft penetrates through the cylinder body to be in contact with the top of the first square test sample; the second loading shaft penetrates through the cylinder body to be in contact with the side portion of the second square test sample. The rock friction test device applies confining pressure to provide a three-dimensional stress state, and ensures that the measured parameters meet the actual conditions.
Description
Technical Field
The invention relates to the technical field of rock friction, in particular to a rock friction test device.
Background
With the rapid development of the economy of China, the exploitation of shallow resources of the earth is almost exhausted, and how to safely and efficiently utilize deep resources of the earth becomes an important direction. When deep engineering construction is carried out, the fault stress state is inevitably changed due to the fault, excavation or mining disturbance, fault activation is induced under certain conditions, and earthquake is generated, so that serious engineering disasters or natural disasters are caused. Fault activation generates a tectonic earthquake, the physical essence of which is vibration generated by release of locally accumulated elastic strain energy during mutual frictional sliding between fault surfaces. In order to reveal the physical mechanical mechanism of the earthquake generated by fault activation, laboratory earthquake or laboratory rock friction test is a method commonly adopted in the international geophysical and seismology fields.
At present, a rock friction test device in a laboratory is used for carrying out a single-sided or double-sided direct shear test on rocks, cuboid samples are adopted for an upper disc and a lower disc of a fault, a certain load is applied to a normal direction of a fault surface, and a disc of the fault is pushed to slide by applying a load in a tangential direction. The direct shear test has the advantages that normal stress distribution on a fault surface is relatively uniform, and a strain gauge or an acoustic emission probe is pasted on the side surface of a sample, so that local information during fault activation can be obtained, and a physical mechanism of fault activation can be better revealed.
Disclosure of Invention
The invention provides a rock friction test device, which solves or partially solves the technical problems that in the prior art, a rock direct shear test is carried out by the rock friction test device, the rock direct shear test is not consistent with the three-dimensional stress condition of a deep fault, and the measured parameters are not in line with the actual situation.
In order to solve the above technical problem, the present invention provides a rock friction test apparatus for applying pressure to a first square sample and a second square sample, the rock friction test apparatus comprising: the device comprises a cylinder, a support column, a first loading shaft and a second loading shaft; the first square sample and the second square sample are arranged in the cylinder body, the first square sample and the second square sample are arranged in a staggered mode along a cross section layer, and an oil filling hole is formed in the cylinder body; the second square sample is arranged on the supporting column; the first loading shaft penetrates through the cylinder body to be in contact with the top of the first square test sample; the second loading shaft penetrates through the cylinder body to be in contact with the side portion of the second square test sample.
Further, a first cushion block is arranged in the cylinder body; the first spacer is disposed between the first square specimen and the first loading shaft.
Further, a first hydraulic servo capsule is arranged between the first cushion block and the second square sample; the top of the first hydraulic servo capsule is flush with the top of the first square test piece.
Further, a second cushion block is arranged in the cylinder body; the second cushion block is arranged between the second loading shaft and the second square sample; an arc-shaped groove is formed in the end face, facing the second square sample, of the second cushion block; a third cushion block is arranged between the second cushion block and the second square sample; the end face, facing the second cushion block, of the third cushion block is arc-shaped, and the third cushion block can be embedded in the arc-shaped groove; the end face, facing the second square sample, of the third cushion block is square; and a first friction reducing plate is arranged between the third cushion block and the second square sample.
Further, a first sealing plate is fixedly arranged on the third cushion block and is in contact with the side of the first cushion block; a first rubber pad is arranged between the first sealing plate and the first cushion block.
Further, a fourth cushion block is arranged between the supporting column and the second square sample.
Further, a second hydraulic servo capsule is arranged between the fourth cushion block and the first square test sample; the bottom of the second hydraulic servo capsule is flush with the bottom of the second square test specimen.
Furthermore, a fifth cushion block is arranged in the cylinder body; the fifth cushion block is arranged between the cylinder and the first square sample; an arc-shaped groove is formed in the end face, facing the first square sample, of the fifth cushion block; a sixth cushion block is arranged between the fifth cushion block and the first square sample; the end face, facing the fifth cushion block, of the sixth cushion block is arc-shaped, and the sixth cushion block can be embedded in the arc-shaped groove; the end face, facing the first square sample, of the sixth cushion block is square; and a second friction reducing plate is arranged between the sixth cushion block and the first square sample.
Further, a second sealing plate is fixedly arranged on the sixth cushion block and is in contact with the side of the fourth cushion block; and a second rubber pad is arranged between the second sealing plate and the fourth cushion block.
Furthermore, a heat-shrinkable sleeve is sleeved outside the sixth cushion block and the third cushion block.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
as the first square sample and the second square sample are arranged in the cylinder body, the first square sample and the second square sample are arranged in a staggered mode along the cross section layer, the oil injection hole is formed in the cylinder body, the second square sample is arranged on the supporting column, the first loading shaft penetrates through the cylinder body to be in contact with the top of the first square sample, the second loading shaft penetrates through the cylinder body to be in contact with the side portion of the second square sample, when the rock friction test is carried out, the first square sample and the second square sample are arranged in the cylinder body in a staggered mode along the cross section layer, the second square sample is supported through the supporting column, hydraulic oil is injected into the cylinder body through the oil injection hole to provide confining pressure for the first square sample and the second square sample, the first loading shaft penetrates through the cylinder body to apply stress to the top of the first square sample, the second loading shaft penetrates through the cylinder body to apply stress to the side portion of the second square sample to provide a three-way stress state, the three-dimensional stress condition of the deep fault is met, and the measured parameters are guaranteed to meet the actual condition.
Drawings
FIG. 1 is a front view of a rock friction test apparatus provided in an embodiment of the present invention;
FIG. 2 is a top view of the rock friction test apparatus of FIG. 1;
FIG. 3 is a schematic layout of a first square test piece and a second square test piece of the rock friction test device of FIG. 1;
FIG. 4 is a sectional view taken along line A-A of FIG. 3;
FIG. 5 is a sectional view taken along line B-B of FIG. 3;
FIG. 6 is a top view of FIG. 3;
FIG. 7 is a bottom view of FIG. 4;
fig. 8 is a schematic layout of a support column of the rock friction test device of fig. 1.
Detailed Description
Referring to fig. 1, 2 and 8, a rock friction test device according to an embodiment of the present invention is used for applying pressure to a first square sample 1 and a second square sample 2, and includes: the device comprises a cylinder 3, a support column 4, a first loading shaft 5 and a second loading shaft 6.
Set up first square sample 1 and the square sample 2 of second in the barrel 3, first square sample 1 sets up along the cross-section layer with the square sample 2 of second in the barrel 3 along the crisscross setting, has seted up the oil filler point on the barrel 3.
A second square sample 2 is arranged on the support column 4.
The first loading shaft 5 passes through the cylinder 3 to contact the top of the first square test piece 1.
The second loading shaft 6 passes through the cylinder 3 to contact the side of the second square sample 2.
In the embodiment of the application, as the first square sample 1 and the second square sample 2 are arranged in the cylinder 3, the first square sample 1 and the second square sample 2 are arranged in a staggered manner along the section layer, the oil injection hole is formed in the cylinder 3, the second square sample 2 is arranged on the support column 4, the first loading shaft 5 penetrates through the cylinder 3 to be in contact with the top of the first square sample 1, and the second loading shaft 6 penetrates through the cylinder 3 to be in contact with the side part of the second square sample 2, when the rock friction test is carried out, the first square sample 1 and the second square sample 2 are arranged in the cylinder 3 in a staggered manner along the section layer, the second square sample 2 is supported by the support column 4, hydraulic oil is injected into the cylinder 3 through the oil injection hole to provide confining pressure for the first square sample 1 and the second square sample 2, the first loading shaft 5 penetrates through the cylinder 3 to apply stress to the top of the first square sample 1, namely, the first loading shaft 5 applies axial load, the second loading shaft 6 penetrates through the cylinder 3 to apply pressure stress to the side part of the second square sample 2, namely, the second loading shaft 6 applies horizontal load, a three-way stress state is provided, the three-dimensional stress condition of a deep fault is met, and the measured parameters are guaranteed to meet the actual condition.
Wherein, because among the prior art triaxial test method adopts cylindrical sample to carry out the rock friction test, there is the contained angle in beveling formula fault plane tendency and the main stress direction that triaxial test method adopted, so make the normal stress of different positions on the fault plane uneven, and the sample of fault plane upper and lower plates is uneven along fault plane thickness, fault activation's law and mechanism receive stress and sample inhomogeneous distribution's influence very big, be unfavorable for quantitative analysis, and this application adopts first square sample 1 and second square sample 2, make the normal stress of different positions on the fault plane of this application even, and fault plane first square sample 1 and second square sample 2 are even along fault plane thickness, fault activation's law and mechanism can not receive stress and sample distribution's influence, do benefit to quantitative analysis. The upper and lower discs of the axial cutting type sample adopted by the triaxial test method are semi-cylinders, and the problem of uneven thickness exists, and the first square sample 1 and the second square sample 2 are adopted in the method, so that the first square sample 1 and the second square sample 2 on the fault surface are uniform in thickness along the fault surface, and the fault activation rule and mechanism cannot be influenced by stress and sample distribution, and quantitative analysis is facilitated.
In addition, as the triaxial test method adopts the cylindrical sample, the strain gauges can not be adhered to the side surfaces of the sample to monitor the physical process of fault nucleation, and the first square sample 1 and the second square sample 2 are adopted in the method, the strain gauges can be adhered to the side surfaces of the first square sample 1 and the second square sample 2 to monitor the physical process of fault nucleation.
In the present embodiment, the size of the first square sample 1 is the same as the size of the second square sample 2, the first square sample 1 and the second square sample 2 are bonded together along the cross-sectional surface, the first square sample 1 and the second square sample 2 are vertically displaced by a predetermined distance, and the top end of the first square sample 1 is 10mm higher than the top end of the second square sample 2, so that the bottom surface of the first square sample 1 is determined to be 10mm higher than the bottom surface of the second square sample 2.
Referring to fig. 4-7, specifically, a first block 7 is disposed within the barrel 3. The first spacer 7 is disposed between the first square test piece 1 and the first loading shaft 5.
When carrying out the rock friction test, the stress that first loading axle 5 applyed passes through first cushion 7 and transmits for first square sample 1, guarantees that first square sample 1 atress is even, avoids first loading axle 5 direct and first square sample 1 contact, leads to first square sample 1 to damage, simultaneously, can seal the top of first square sample 1 and the square sample 2 of second, avoids hydraulic oil to leak first square sample 1 and the square sample 2 department of second, and the influence test is gone on.
Specifically, a first hydraulic servo capsule 21 is arranged between the first cushion block 7 and the second square sample 2, the top of the first hydraulic servo capsule 21 is flush with the top of the first square sample 1, the first hydraulic servo capsule 21 ensures that the force applied by the first loading shaft 5 can only act on the first square sample 1 for buffering, and the stress value of the top end of the first square sample 1 is kept to be the confining pressure value and is not changed along with the dislocation.
Specifically, a second cushion block 8 is arranged in the cylinder 3.
A second spacer 8 is arranged between the second loading shaft 6 and the second square specimen 2.
The end face of the second cushion block 8 facing the second square sample 2 is provided with an arc-shaped groove.
And a third cushion block 9 is arranged between the second cushion block 8 and the second square sample 2.
The end face, facing the second cushion block 8, of the third cushion block 9 is arc-shaped, and the third cushion block 9 can be embedded in the arc-shaped groove.
The end face of the third block 9 facing the second square sample 2 is square.
In the present embodiment, the horizontal direction load applied by the second loading shaft 6 is transmitted to the third cushion block 9 through the second cushion block 8, and is transmitted to the second square sample 2 through the third cushion block 9, so that the first loading shaft 5 is prevented from directly contacting with the first square sample 1, and the first square sample 1 is prevented from being damaged. Simultaneously, the arc wall has been seted up towards the terminal surface of the square sample 2 of second to second cushion 8, and the terminal surface of third cushion 9 towards second cushion 8 is the arc, and third cushion 9 inlays and locates in the arc wall, through arc wall parcel third cushion 9, guarantees that the horizontal direction load that second loading axle 6 was applyed can evenly transmit for the square sample 2 of second, guarantees that the square sample 2 atress of second is even.
Wherein, be provided with first antifriction board 10 between third cushion 9 and the square sample 2 of second, reduce the friction through first antifriction board 10, avoid frictional force effect on the square sample 2 of second, guarantee that the test result is accurate. In the present embodiment, the material of the first friction reducing plate 10 may be polytetrafluoroethylene.
In the embodiment, the size of the first friction reducing plate 10 is matched with that of the second square sample 2, so that friction between the second square sample 2 and the third cushion block 9 is prevented from influencing the test result in the test process.
Specifically, fixed first shrouding 11 that is provided with on the third cushion 9, the lateral part contact of first shrouding 11 and first cushion 7 seals the lateral part of first cushion 7 through first shrouding 11, further seals the top of first square sample 1 and the square sample 2 of second, avoids hydraulic oil to leak first square sample 1 and the square sample 2 department of second, and the influence test goes on, guarantees that the power transmission of second loading axle 6 application of force is for the square sample 2 of second and first square sample 1.
Be provided with first rubber pad 12 between first shrouding 9 and the first cushion 7, play the effect of buffering, only act on the square sample 2 of second in order to guarantee the load that second loading axle 6 applyed, avoid the load to act on first cushion 7, guarantee that the test result is accurate.
Specifically, be provided with fourth cushion 13 between support column 4 and the square sample 2 of second, support column 4 supports first square sample 1 and the square sample 2 of second through fourth cushion 13, simultaneously, can seal the bottom of first square sample 1 and the square sample 2 of second, avoids hydraulic oil to leak first square sample 1 and the square sample 2 department of second, influences the experiment and carries out
Specifically, be provided with second hydraulic servo capsule 14 between fourth cushion 13 and the first square sample 1, the bottom of second hydraulic servo capsule 14 and the bottom parallel and level of the square sample 2 of second buffer the first square sample 1, avoid reaction force to act on first square sample 1, guarantee that first square sample 1 top stress magnitude keeps for the confining pressure size, does not change along with the dislocation.
Specifically, a fifth pad 15 is fixedly disposed in the cylinder 3 for providing a reaction force to the first square sample 1 and the second square sample 2.
A fifth pad 15 is provided between the cylinder and the first square specimen 1.
The end face of the fifth cushion block 15 facing the first square sample 1 is provided with an arc-shaped groove.
A sixth block 16 is arranged between the fifth block 15 and the first square sample 1.
The end face, facing the fifth cushion block 15, of the sixth cushion block 16 is arc-shaped, and the sixth cushion block 16 can be embedded in the arc-shaped groove.
The end face of the sixth block 16 facing the first square sample 1 is square.
In the present embodiment, the horizontal load applied by the second loading shaft 6 is transmitted to the third pad block 9 through the second pad block 8, transmitted to the second square sample 2 by the third pad block 9, and reacted to the second square sample 2 by the fifth pad block 15 and the sixth pad block 16. Simultaneously, the arc wall has been seted up towards the terminal surface of first square sample 1 to fifth cushion 15, and the terminal surface of sixth cushion 16 towards fifth cushion 15 is the arc, and sixth cushion 16 inlays and locates in the arc wall, through arc wall parcel sixth cushion 16, guarantees that reaction force can evenly transmit for first square sample 1, guarantees that first square sample 1 atress is even.
Specifically, a second friction reducing plate 17 is arranged between the sixth cushion block 16 and the first square sample 1, friction is reduced through the second friction reducing plate 17, friction force is prevented from acting on the first square sample 1, and accuracy of a test result is guaranteed. In the present embodiment, the second friction reducing plate 17 may be made of polytetrafluoroethylene. .
Specifically, a second sealing plate 18 is fixedly arranged on the sixth cushion block 16, the second sealing plate 18 is in contact with the side portion of the fourth cushion block 13, the side portion of the fourth cushion block 13 is sealed through the second sealing plate 18, the bottoms of the first square sample 1 and the second square sample 2 are further sealed, hydraulic oil is prevented from leaking to the first square sample 1 and the second square sample 2, and the influence test is conducted.
Specifically, be provided with second rubber pad 19 between second shrouding 18 and the fourth cushion 13, play the effect of buffering, only act on first square sample 2 in order to guarantee the reaction force, avoid the load to act on fourth cushion 13, guarantee that the test result is accurate, guarantee that the power of exerting of second loading axle 6 transmits for second square sample 2 and first square sample 1.
Specifically, the sixth cushion block 16 and the third cushion block 9 are sleeved with the heat shrinkable sleeve 20, the side portions of the first square sample 1 and the second square sample 2 are sealed through the heat shrinkable sleeve, so that the oil leakage condition caused by the fact that hydraulic oil enters the first square sample 1 and the second square sample 2 when oil pressure is applied in the experiment process is avoided, and the sixth cushion block 16 and the third cushion block 9 are fixed into a whole by means of the heat shrinkable sleeve 13.
Meanwhile, the end face, facing the fifth cushion block 15, of the sixth cushion block 16 is arc-shaped, the end face, facing the second cushion block 8, of the third cushion block 9 is arc-shaped, the sharp edges of the first square sample 1 and the second square sample 2 cannot be in direct contact with the heat shrinkable sleeve 20, the sharp edges cannot cause damage to the heat shrinkable sleeve 20, integrity of the heat shrinkable sleeve 20 is guaranteed, and hydraulic oil is prevented from entering the first square sample 1 and the second square sample 2.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A rock friction test device for applying pressure to a first square sample and a second square sample, the rock friction test device comprising: the device comprises a cylinder, a support column, a first loading shaft and a second loading shaft;
the first square sample and the second square sample are arranged in the cylinder body, the first square sample and the second square sample are arranged in a staggered mode along a cross section layer, and an oil filling hole is formed in the cylinder body;
the second square sample is arranged on the supporting column;
the first loading shaft penetrates through the cylinder body to be in contact with the top of the first square test sample;
the second loading shaft penetrates through the cylinder body to be in contact with the side portion of the second square test sample.
2. A rock friction test apparatus according to claim 1, wherein:
a first cushion block is arranged in the cylinder body;
the first spacer is disposed between the first square specimen and the first loading shaft.
3. A rock friction test apparatus according to claim 2, wherein:
a first hydraulic servo capsule is arranged between the first cushion block and the second square sample;
the top of the first hydraulic servo capsule is flush with the top of the first square test piece.
4. A rock friction test apparatus according to claim 2, wherein:
a second cushion block is arranged in the cylinder;
the second cushion block is arranged between the second loading shaft and the second square sample;
an arc-shaped groove is formed in the end face, facing the second square sample, of the second cushion block;
a third cushion block is arranged between the second cushion block and the second square sample;
the end face, facing the second cushion block, of the third cushion block is arc-shaped, and the third cushion block can be embedded in the arc-shaped groove;
the end face, facing the second square sample, of the third cushion block is square;
and a first friction reducing plate is arranged between the third cushion block and the second square sample.
5. A rock friction test apparatus according to claim 4, wherein:
a first sealing plate is fixedly arranged on the third cushion block and is in contact with the side part of the first cushion block;
a first rubber pad is arranged between the first sealing plate and the first cushion block.
6. A rock friction test apparatus according to claim 4, wherein:
and a fourth cushion block is arranged between the support column and the second square sample.
7. A rock friction test apparatus according to claim 6, wherein:
a second hydraulic servo capsule is arranged between the fourth cushion block and the first square sample;
the bottom of the second hydraulic servo capsule is flush with the bottom of the second square test specimen.
8. A rock friction test apparatus according to claim 6, wherein:
a fifth cushion block is arranged in the cylinder body;
the fifth cushion block is arranged between the cylinder and the first square sample;
an arc-shaped groove is formed in the end face, facing the first square sample, of the fifth cushion block;
a sixth cushion block is arranged between the fifth cushion block and the first square sample;
the end face, facing the fifth cushion block, of the sixth cushion block is arc-shaped, and the sixth cushion block can be embedded in the arc-shaped groove;
the end face, facing the first square sample, of the sixth cushion block is square;
and a second friction reducing plate is arranged between the sixth cushion block and the first square sample.
9. A rock friction test apparatus according to claim 8, wherein:
a second sealing plate is fixedly arranged on the sixth cushion block and is in contact with the side part of the fourth cushion block;
and a second rubber pad is arranged between the second sealing plate and the fourth cushion block.
10. A rock friction test apparatus according to claim 8, wherein:
and the sixth cushion block and the third cushion block are sleeved with a heat-shrinkable sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110851920.4A CN113686695A (en) | 2021-07-27 | 2021-07-27 | Rock friction test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110851920.4A CN113686695A (en) | 2021-07-27 | 2021-07-27 | Rock friction test device |
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| CN113686695A true CN113686695A (en) | 2021-11-23 |
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| CN202110851920.4A Pending CN113686695A (en) | 2021-07-27 | 2021-07-27 | Rock friction test device |
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2021
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