CN115389342B - Rock torsion shear instrument combined with global monitoring - Google Patents
Rock torsion shear instrument combined with global monitoring Download PDFInfo
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- CN115389342B CN115389342B CN202211041265.7A CN202211041265A CN115389342B CN 115389342 B CN115389342 B CN 115389342B CN 202211041265 A CN202211041265 A CN 202211041265A CN 115389342 B CN115389342 B CN 115389342B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 44
- 239000011435 rock Substances 0.000 title claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims description 20
- 238000005452 bending Methods 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 18
- 238000012360 testing method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 11
- 238000012797 qualification Methods 0.000 abstract description 3
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 230000001808 coupling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a rock torsion shear apparatus combined with global monitoring. In the sample loading process of the sample, the shaking and rotation of the upper loading disc are limited through the fixed guide rod, so that the damage to the sample possibly caused in the sample loading process is reduced, and the qualification rate of the test is improved. Meanwhile, the axial pressure and the torque are applied through different hydraulic devices, so that the mutual interference in the axial force and torque application process is avoided, and the accuracy of the test is improved.
Description
Technical Field
The invention relates to the technical field of rock torsion shear apparatuses, in particular to a rock torsion shear apparatus combining global monitoring.
Background
In the development process of basic engineering in the fields of water conservancy and hydropower, traffic, energy storage, energy development and the like, the stress environment of surrounding rock is very complex, and rocks under different stress paths can show different damage modes and peak strengths. In the process of changing the stress path, besides the change of the stress, the rotation of the stress direction is also not neglected. The large-angle rotation of the stress direction can cause the reduction of the rock mass strength and promote the development of cracks, so that the occurrence of disasters such as rock burst and the like is induced, the life safety of constructors is threatened, and great economic loss is caused. Therefore, it is very interesting to study the strength decrease caused by the rotation of stress and the deformation law.
Disclosure of Invention
The invention provides the rock torsion shear apparatus combined with global monitoring, which can study the strength reduction and deformation rule caused by stress rotation.
The invention provides a rock torsion shear apparatus combined with global monitoring, comprising: the device comprises a frame, a guide rod, a lower pressing rod, an upper loading disc, a lower loading disc, a rotary motor, a power cylinder, a shooting component and a processor; the guide rod, the lower pressure rod, the rotary motor and the power cylinder are all arranged on the frame; the upper loading disc is arranged at the end part of the lower pressure rod; the lower loading disc is arranged on the rotary motor; a guide through hole is formed in the upper loading disc; the guide rod passes through the guide through hole; the power output end of the power cylinder is communicated with the power input ends of the downward pressure rod and the rotary motor; and a shooting end of the shooting component faces between the upper loading disc and the lower loading disc, and a signal output end of the shooting component is in communication connection with a signal input end of the processor.
Specifically, the method further comprises the steps of: an upper sleeve, a lower sleeve, an elastic component and an air heating device; the upper end of the upper sleeve is connected with the lower end of the upper loading disc; the lower end of the lower sleeve is connected with the upper end of the lower loading disc; the lower end of the upper sleeve is sleeved with the upper end of the lower sleeve; the lower end of the upper sleeve is provided with an upper bending structure; the upper end of the lower sleeve is provided with a lower bending structure; the upper end of the elastic component is connected with the upper bending structure, and the lower end of the elastic component is connected with the lower bending structure; the upper sleeve is provided with an air outlet hole; an air inlet is arranged on the lower sleeve; the air outlet hole is communicated with the air inlet end of the air heating device, and the air inlet hole is communicated with the air outlet end of the air heating device; the signal input end of the air heating device is in communication connection with the signal output end of the processor.
Specifically, a high temperature resistant sealing ring is arranged between the upper sleeve and the lower sleeve.
Specifically, the method further comprises the steps of: a temperature monitoring component; the temperature monitoring component is arranged at the air outlet end of the air heating device; the signal output end of the temperature monitoring component is in communication connection with the signal input end of the processor.
Specifically, the method further comprises the steps of: a pressure monitoring component; the pressure monitoring component is arranged at the power output end of the power cylinder; the signal output end of the pressure monitoring component is in communication connection with the signal input end of the processor.
Specifically, the processor is at least used for comparing and analyzing two adjacent pictures shot by the shooting component based on the DIC processing system, and comparing the position change of a special point on the sample so as to realize global deformation monitoring of the sample.
In particular, the photographing means is an industrial camera.
One or more technical schemes provided by the invention have at least the following technical effects or advantages:
in the sample loading process of the sample, the shaking and rotation of the upper loading disc are limited through the fixed guide rod, so that the damage to the sample possibly caused in the sample loading process is reduced, and the qualification rate of the test is improved. Meanwhile, the axial pressure and the torque are applied through different hydraulic devices, so that the mutual interference in the axial force and torque application process is avoided, and the accuracy of the test is improved.
1. The digital speckle correlation (DIC) method can be used for full-field deformation monitoring of the sample, so that the monitoring precision is improved, and the requirements on the test environment are also very relaxed.
2. Through the use of the air heating device and the temperature monitoring component, rock torsion shear tests under different temperature states are realized. Through flexible thermal-insulated sleeve, realized the temperature control in the loading process, and then realized the technical effect of carrying out the torsional shear test under the high temperature state for the first time.
Drawings
FIG. 1 is a front view of a rock torsion shear apparatus incorporating global monitoring provided in an embodiment of the present invention;
FIG. 2 is a cross-sectional view of section 1 of FIG. 1;
FIG. 3 is a cross-sectional view of section 2 of FIG. 1;
FIG. 4 is a cross-sectional view of section 3 of FIG. 1;
FIG. 5 is a cross-sectional view of section 4 of FIG. 1;
fig. 6 is a schematic diagram of the connection of the upper sleeve 10 and the lower sleeve 11 in a rock torsion shear apparatus incorporating global monitoring according to an embodiment of the present invention;
FIG. 7 is an enlarged view of the connection of the upper 10 and lower 11 sleeves of the rock torsion shear apparatus incorporating global monitoring provided by an embodiment of the present invention;
The device comprises a 1-frame, a 2-guide rod, a 3-lower pressure rod, a 4-upper loading disc, a 5-lower loading disc, a 6-rotary motor, a 7-power cylinder, an 8-shooting component, a 9-processor, a 10-upper sleeve, a 11-lower sleeve, a 12-elastic component, a 13-air heating device, a 14-air outlet hole, a 15-air inlet hole, a 16-high temperature resistant sealing ring, a 17-bracket, a 18-sample and a 19-high pressure oil pipe.
Detailed Description
The embodiment of the invention can study the strength reduction and deformation rule caused by stress rotation by providing the rock torsion shear apparatus combined with global monitoring.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
Referring to fig. 1,2,3, 4 and 5, a rock torsion shear apparatus with global monitoring according to an embodiment of the present invention includes: the device comprises a frame 1, a guide rod 2, a lower pressure rod 3, an upper loading disc 4, a lower loading disc 5, a rotary motor 6, a power cylinder 7, a shooting component 8 and a processor 9; the guide rod 2, the pressing rod 3, the rotary motor 6 and the power cylinder 7 are all arranged on the frame 1; the upper loading disc 4 is arranged at the end part of the lower pressure rod 3; the lower loading disc 5 is arranged on the rotary motor 6; a guide through hole is formed in the upper loading disc 4; the guide rod 2 passes through the guide through hole; the power output end of the power cylinder 7 is communicated with the power input end of the lower pressure rod 3 and the rotary motor 6; the shooting end of the shooting part 8 is communicated and connected between the upper loading disc 4 and the lower loading disc 5, and the signal output end of the shooting part 8 is communicated and connected with the signal input end of the processor 9.
In order to ensure that the upper loading plate 4 is pressed down in a balanced manner, the guide bar 2 has two symmetrically arranged left and right, and correspondingly, two symmetrically arranged guide through holes are also arranged left and right on the upper loading plate 4.
To achieve a torsion shear test under temperature-stress coupling, see fig. 6 and 7, further comprising: an upper sleeve 10, a lower sleeve 11, an elastic member 12, and an air heating device 13; the upper end of the upper sleeve 10 is connected with the lower end of the upper loading disc 4; the lower end of the lower sleeve 11 is connected with the upper end of the lower loading disc 5; the lower end of the upper sleeve 10 is sleeved with the upper end of the lower sleeve 11; the lower end of the upper sleeve 10 is provided with an upper bending structure; the upper end of the lower sleeve 11 is provided with a lower bending structure; the upper end of the elastic component 12 is connected with the upper bending structure, and the lower end of the elastic component 12 is connected with the lower bending structure; the upper sleeve 10 is provided with an air outlet hole 14; an air inlet hole 15 is formed in the lower sleeve 11; the air outlet hole 14 is communicated with the air inlet end of the air heating device 13, and the air inlet hole 15 is communicated with the air outlet end of the air heating device 13; the signal input of the air heating device 13 is connected in communication with the signal output of the processor 9. The upper sleeve 10 is always propped against the upper loading disc 4 through the elastic part 12, and the lower sleeve 11 is always propped against the lower loading disc 5; and allows the upper sleeve 10 to move downwardly with the upper loading plate 4. The air heating device 13 heats the air entering from the air inlet end to a specified temperature by receiving a signal and sends the air into the sleeve, so that a torsion shear test under the stress-temperature coupling effect is realized. The embodiment of the invention can realize the temperature control range of 0-200 ℃.
In this embodiment, the upper sleeve 10 and the lower sleeve 11 are made of acrylic, and the elastic member 12 is a spring.
In order to ensure that the high-temperature gas cannot overflow, a high-temperature resistant sealing ring 16 is arranged between the upper sleeve 10 and the lower sleeve 11.
In order to realize accurate monitoring and adjustment of the temperature environment of the torsion shear test, the method further comprises the following steps: a temperature monitoring component; the temperature monitoring component is arranged at the air outlet end of the air heating device 13; the signal output of the temperature monitoring means is connected in communication with the signal input of the processor 9.
In order to realize accurate monitoring and adjustment of the pressure of the torsion shear test, the method further comprises the following steps: a pressure monitoring component; the pressure monitoring component is arranged at the power output end of the power cylinder 7; the signal output of the pressure monitoring means is connected in communication with the signal input of the processor 9.
To specifically describe the process of global deformation monitoring of the sample 18, the processor 9 is at least configured to compare and analyze two adjacent pictures captured by the capturing component 8 based on the DIC processing system, and compare the position change of a specific point on the sample 18, so as to realize global deformation monitoring of the sample 18.
In the present embodiment, the photographing part 8 is an industrial camera, which is provided on the frame 1 through an industrial camera mount 17. The pressure-down lever 3 is a hydraulic lever. The swing motor 6 is a hydraulic swing motor. The power cylinder 7 is a hydraulic cylinder, and the hydraulic cylinder is connected with a hydraulic rod and a hydraulic rotary motor through a high-pressure oil pipe 19.
The structure of the rock torsion shear apparatus with global monitoring provided in the embodiment of the present invention is further described below, and the embodiment of the present invention is divided into an axial force application system and a torque application system. The axial force application system comprises a lower pressing rod 3, an upper loading disc 4 and a guide rod 2; the torque application system comprises a swing motor 6 and a lower loading disc 5. The power source is provided by the power cylinder 7, and the delivery of the power cylinder 7 at the next moment is adjusted by measuring the oil pressure value in real time so as to realize constant pressure loading. The target axial pressure and the target torque are set in the processor 9. The depression bar 3 can convert the oil pressure into axial pressure to apply axial force to the rock sample 18. The upper loading plate 4 applies the pressure generated by the lower pressure lever 3 to the sample 18, and the guide bar 2 restricts the moving path so that it can move only vertically. The rotary motor 6 can convert the oil pressure into torque, and the lower loading disc 5 transmits the torque generated by the rotary motor 6 to the sample 18 and is engraved with a circle having a diameter of 50mm, which is concentric with the lower loading disc 5. The industrial camera may take high-rate real-time photographs (0-6000 frames/s) of the specimen 18, capture the photographs as gray scale images, and transmit them in real-time to the DIC processing system for storage and processing. The DIC processing system compares the two adjacent pictures for comparison and compares the change in position of the specific point on the specimen 18 to achieve global deformation monitoring of the specimen 18.
The use method of the rock torsion shear apparatus combined with global monitoring provided by the embodiment of the invention comprises the following steps:
1. The rock sample 18 is pre-treated. Wiping both ends of the sample 18 with alcohol to form a cleaning surface; speckle is sprayed on the sides of the rock specimen 18.
2. The upper loading disc 4 is lifted by a hydraulic rod, quick-drying ab glue is smeared on two ends of the rock sample 18, the rock sample 18 is placed in the center of the lower loading disc 5, and an acrylic sleeve is sleeved on the periphery of the rock sample 18.
3. The upper loading disc 4 is lowered, the oil pressure servo system is used for loading pre-pressing on the rock sample 18, so that the rock sample is subjected to normal stress of 0.1MPa, and the rock sample is kept stand until the glue is solidified.
4. The air heating device 13 is operated by inputting a desired temperature into a computer, and the sample 18 is heated by hot air and left to stand for 30 minutes.
5. The industrial camera is activated and the high speed photographing of the rock sample 18 is started.
6. The hydraulic pressure is controlled by a hydraulic servo system so that the load applied to the sample 18 reaches a target value.
7. And 6, repeating the step, and realizing real-time monitoring of multiple loading loops.
8. At the end of the test, the industrial camera was turned off, the air heating system was turned off, the end of the rock sample 18 was heated with a hot air blower, and the sample 18 was removed.
The embodiment of the invention simplifies the sample loading process and improves the qualification rate. By the embedded DIC system, high precision global monitoring of the sample 18 is achieved. Through an embedded temperature control system, the torsion shear test under the stress-temperature coupling effect is realized for the first time.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (5)
1. A rock torsion shear apparatus incorporating global monitoring, comprising: the device comprises a frame, a guide rod, a lower pressing rod, an upper loading disc, a lower loading disc, a rotary motor, a power cylinder, a shooting component and a processor; the guide rod, the lower pressure rod, the rotary motor and the power cylinder are all arranged on the frame; the upper loading disc is arranged at the end part of the lower pressure rod; the lower loading disc is arranged on the rotary motor; a guide through hole is formed in the upper loading disc; the guide rod passes through the guide through hole; the power output end of the power cylinder is communicated with the power input ends of the downward pressure rod and the rotary motor; the shooting end of the shooting component faces between the upper loading disc and the lower loading disc, and the signal output end of the shooting component is in communication connection with the signal input end of the processor; further comprises: an upper sleeve, a lower sleeve, an elastic component and an air heating device; the upper end of the upper sleeve is connected with the lower end of the upper loading disc; the lower end of the lower sleeve is connected with the upper end of the lower loading disc; the lower end of the upper sleeve is sleeved with the upper end of the lower sleeve; the lower end of the upper sleeve is provided with an upper bending structure; the upper end of the lower sleeve is provided with a lower bending structure; the upper end of the elastic component is connected with the upper bending structure, and the lower end of the elastic component is connected with the lower bending structure; the upper sleeve is provided with an air outlet hole; an air inlet is arranged on the lower sleeve; the air outlet hole is communicated with the air inlet end of the air heating device, and the air inlet hole is communicated with the air outlet end of the air heating device; the signal input end of the air heating device is in communication connection with the signal output end of the processor; the processor is at least used for comparing and analyzing two adjacent pictures shot by the shooting component based on the DIC processing system, and comparing the position change of the special point on the sample so as to realize global deformation monitoring of the sample.
2. The rock torsion shear apparatus of claim 1 wherein a high temperature seal is provided between the upper sleeve and the lower sleeve.
3. The rock torsion shear apparatus of claim 1, further comprising: a temperature monitoring component; the temperature monitoring component is arranged at the air outlet end of the air heating device; the signal output end of the temperature monitoring component is in communication connection with the signal input end of the processor.
4. The rock torsion shear apparatus of claim 1, further comprising: a pressure monitoring component; the pressure monitoring component is arranged at the power output end of the power cylinder; the signal output end of the pressure monitoring component is in communication connection with the signal input end of the processor.
5. The rock torsion shear apparatus of claim 1, wherein the photographing means is an industrial camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211041265.7A CN115389342B (en) | 2022-08-29 | 2022-08-29 | Rock torsion shear instrument combined with global monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211041265.7A CN115389342B (en) | 2022-08-29 | 2022-08-29 | Rock torsion shear instrument combined with global monitoring |
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| Publication Number | Publication Date |
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| CN115389342A CN115389342A (en) | 2022-11-25 |
| CN115389342B true CN115389342B (en) | 2024-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211041265.7A Active CN115389342B (en) | 2022-08-29 | 2022-08-29 | Rock torsion shear instrument combined with global monitoring |
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| CN (1) | CN115389342B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1040380A1 (en) * | 1982-04-22 | 1983-09-07 | Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Горной Геомеханики И Маркшейдерского Дела | Device for specimen torsion-testing |
| CN104155175A (en) * | 2014-07-18 | 2014-11-19 | 中国科学院武汉岩土力学研究所 | Rock hollow cylinder torsion shear apparatus |
| CN106018059A (en) * | 2016-05-23 | 2016-10-12 | 中国矿业大学 | Test device and method applicable to rock and capable of realizing principal stress axis rotation |
| CN108152147A (en) * | 2018-03-16 | 2018-06-12 | 华北理工大学 | Rock sample torsional fracture breaking test device and simulation rock sample torsional fracture destruction methods |
| CN114002096A (en) * | 2021-12-30 | 2022-02-01 | 中国科学院地质与地球物理研究所 | True triaxial rock-drill interaction experimental device for ultra-deep drilling |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105973722B (en) * | 2016-07-26 | 2017-03-15 | 山东科技大学 | The constant normal stiffness shearing test device of rock discontinuum and its test method |
-
2022
- 2022-08-29 CN CN202211041265.7A patent/CN115389342B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1040380A1 (en) * | 1982-04-22 | 1983-09-07 | Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Горной Геомеханики И Маркшейдерского Дела | Device for specimen torsion-testing |
| CN104155175A (en) * | 2014-07-18 | 2014-11-19 | 中国科学院武汉岩土力学研究所 | Rock hollow cylinder torsion shear apparatus |
| CN106018059A (en) * | 2016-05-23 | 2016-10-12 | 中国矿业大学 | Test device and method applicable to rock and capable of realizing principal stress axis rotation |
| CN108152147A (en) * | 2018-03-16 | 2018-06-12 | 华北理工大学 | Rock sample torsional fracture breaking test device and simulation rock sample torsional fracture destruction methods |
| CN114002096A (en) * | 2021-12-30 | 2022-02-01 | 中国科学院地质与地球物理研究所 | True triaxial rock-drill interaction experimental device for ultra-deep drilling |
Non-Patent Citations (2)
| Title |
|---|
| 北山沙枣园花岗岩岩体露头节理的平面特征研究;王贵宾等;《岩石力学与工程学报》;20230915;全文 * |
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| CN115389342A (en) | 2022-11-25 |
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