CN112326476A - Testing method and device for rock multi-field coupling rheological test under action of dynamic load - Google Patents
Testing method and device for rock multi-field coupling rheological test under action of dynamic load Download PDFInfo
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- 239000011435 rock Substances 0.000 title claims abstract description 77
- 238000012360 testing method Methods 0.000 title claims abstract description 71
- 230000009471 action Effects 0.000 title claims abstract description 30
- 230000008878 coupling Effects 0.000 title claims abstract description 20
- 238000010168 coupling process Methods 0.000 title claims abstract description 20
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 20
- 238000011068 loading method Methods 0.000 claims abstract description 24
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 238000010998 test method Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 32
- 230000008859 change Effects 0.000 claims description 29
- 239000003921 oil Substances 0.000 claims description 26
- 230000003204 osmotic effect Effects 0.000 claims description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 13
- 125000004122 cyclic group Chemical group 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 239000010720 hydraulic oil Substances 0.000 claims description 9
- 239000004411 aluminium Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000035939 shock Effects 0.000 abstract description 7
- 238000004880 explosion Methods 0.000 abstract description 4
- 239000002360 explosive Substances 0.000 abstract description 4
- 230000001276 controlling effect Effects 0.000 description 12
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 235000019738 Limestone Nutrition 0.000 description 4
- 239000006028 limestone Substances 0.000 description 4
- 238000005422 blasting Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
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- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- 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
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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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
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- G01N2203/0048—Hydraulic means
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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
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- 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
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
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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
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
- G01N2203/0242—With circulation of a fluid
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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
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
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Abstract
The invention discloses a testing method and a testing device for a rock multi-field coupling rheological test under the action of dynamic load, belonging to the fields of rock mechanics, civil engineering and geological disasters; the existing test method and equipment apply instantaneous load to the rock, and the influence of explosion on the rock caused by the instantaneous load cannot be simulated in the simulated working condition. The rock sample is placed in a sample chamber of a triaxial rheological test device, mechanical energy output by a motor is converted into dynamic load continuously applied to the rock sample through two times of hydraulic transmission, and the influence of explosive blast shock waves on the rock is simulated; a load loading mechanism above the sample chamber on the device converts the rotary motion of the motor into linear reciprocating motion, and applies continuous dynamic load to the rock sample by hydraulic transmission through a cylinder body, a power converter and a hydraulic hose connected with the cylinder body and the power converter; the testing method and the testing equipment provided by the invention are convenient and flexible, and are suitable for various test sites.
Description
Technical Field
The invention relates to a testing method and equipment for a rock multi-field coupling rheological test under the action of dynamic load, and belongs to the fields of rock mechanics, civil engineering and geological disasters.
Background
The multi-field coupling problem of the rock is an important research subject of rock mechanics at present, and has very important engineering background and significance. In the areas of the south and the south of China, such as Yunnan, Sichuan, Guizhou, Guangxi and other provinces, a dyadic limestone stratum exists in a large range, and the stratum has abundant high-quality limestone mineral resources and is an important building material source for building a large number of basic facilities in China. The two-cascade limestone stratum distribution area is a section where rainfall frequently occurs in China, dynamic load can be generated by differential blasting in the open-pit mining process of limestone mine, continuous shock wave disturbance influence is generated on rocks after blasting, and geological disasters such as landslide and collapse frequently occur in the area under the combined action of blasting shock waves, freeze-thaw cycles and rainfall seepage. Determining the long-term stability of the rock is an important premise for solving disasters such as landslide and collapse from the mechanism.
The rheological mechanical property test of the rock is one of the main means for determining the long-term stability of the rock, and the development of the multi-field coupling rheological test of the rock under the action of dynamic load becomes necessary. At present, a multi-field coupling rheological test load loading method under the action of dynamic load is to load axial dynamic load on a rock sample in an intermittent impact or impact mode at the top of a sample chamber so as to simulate the influence of explosive explosion on applying instantaneous load to the rock, but both loading modes can not simulate the continuous influence of shock waves generated by explosive explosion on the rock; meanwhile, the loading in the form of impact and impact can also lead the equipment to generate irregular vibration in the test process, so that the whole equipment is easy to damage, and the detection data can be influenced; in addition, in the existing test method, the seepage system takes water as a seepage medium, so that water icing under a low-temperature condition cannot meet different seepage test conditions, and the test purpose and effect cannot be achieved. Meanwhile, in the existing test equipment, a servo motor drives a piston, and a loading device driven by a dowel bar fixedly connected with the piston impacts a rock sample, so that the dynamic load can not be continuously applied to the rock sample in the test process, and the function of continuously applying the axial dynamic load can not be realized.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a method and equipment for a multi-field coupling rheological test under the action of dynamic load.
The technical scheme adopted by the invention for solving the technical problems is as follows: placing a rock sample in a sample chamber of a triaxial rheological test, controlling the temperature of the sample chamber to be minus 30-50 ℃, controlling the confining pressure of the sample chamber to be not more than 30MPa, controlling the osmotic pressure of the sample chamber to be not more than 1MPa, and applying a cyclic vibration dynamic load with the axial direction not more than 100MPa and not more than 50hz at the top end of the rock sample to carry out a triaxial rheological test; measuring the change values of dynamic stress strain and volume deformation of the rock sample along with time under the action of dynamic load; the cyclic vibration dynamic load is generated in such a way that the rotary motion of the motor is converted into linear reciprocating motion through the crank-link mechanism, the crank-link mechanism drives the piston A in the cylinder A to apply force to the liquid in the cylinder A, and the cyclic vibration dynamic load is applied to the rock sample by utilizing hydraulic transmission, the cylinder B and the piston B in the cylinder B.
The technical scheme is further implemented by obtaining a relation function between the change of the dynamic stress strain, the change of the volume and the time according to the measured change values of the dynamic stress strain and the body change of the rock sample under the action of the dynamic load along with the time.
The technical scheme adopts the following specific steps: the temperature in the sample chamber is adjusted by controlling the temperature of the top end and the bottom end of the sample chamber, and the temperature in the sample chamber is controlled to be-30-50 ℃; inputting hydraulic liquid into the sample chamber to produce confining pressure, wherein the confining pressure is controlled to be not more than 30 Mpa; applying constant air pressure to the top end and the bottom end of the sample chamber, wherein the air pressure of the top end is greater than that of the bottom end, generating constant air pressure difference to form osmotic pressure, and controlling the osmotic pressure to be not more than 1 MPa; applying axial cyclic vibration dynamic load of not more than 100MPa and not more than 50hz to the rock sample; and measuring the change values of the dynamic stress strain and the volume deformation of the rock sample along with time under the action of dynamic load.
The invention provides a testing device for a multi-field coupling rheological test of rocks under the action of dynamic load for solving the technical problem, which comprises the following specific steps: the top end of a sample chamber of the triaxial rheological test device is connected with a load loading mechanism, and the load loading mechanism comprises a power output unit, a hydraulic transmission unit and a load output unit;
the power output unit at least comprises a motor and a crank connected with the motor;
the load output unit at least comprises a dowel bar and a loading plate connected with the dowel bar, and the loading plate is in contact with the upper surface of the sample chamber;
the hydraulic transmission unit at least comprises a cylinder body A and a power converter, hydraulic oil is filled in a liquid storage pressure bin at the lower part of a piston A in the cylinder body A, a piston rod fixed on the upper surface of the piston A is connected with a crank, a hydraulic valve is arranged on an oil supply pipe at the side part of the liquid storage pressure bin, and the oil supply pipe is communicated with the liquid storage pressure bin and an oil cylinder A; the power converter comprises a cylinder body B and a piston B positioned in the cylinder body B, and the lower surface of the piston B is connected with the dowel bar; the lower part of the liquid storage pressure bin is communicated with the upper part of the cylinder body B through a hydraulic hose.
The technical scheme is further improved as follows:
triaxial rheological test device's sample room top and bottom are connected with the aluminium dish that is used for adjusting the indoor temperature of sample, and top aluminium dish A is connected with temperature cycle case A through two temperature cycle liquid hoses A and is led to, and bottom aluminium dish B communicates with temperature cycle case B through two temperature cycle liquid hoses B, and the temperature cycle case includes at least: cylinder body, heating rod and condenser pipe.
The top and the bottom of a sample chamber of the triaxial rheological test device are communicated with vent pipes, the top vent pipe is communicated with an air cylinder A, the vent pipe is provided with an air pressure valve A, the bottom vent pipe is communicated with an air cylinder B, and the vent pipe is provided with an air pressure valve B.
And the side part of a sample chamber of the triaxial rheological test device is connected with an oil pipe, the oil pipe is communicated with the oil cylinder B, and a hydraulic valve is arranged on the oil pipe.
In conclusion, the technical scheme of the invention has the beneficial effects that:
according to the method, the motor generates power, the mechanical energy of the motor is converted into hydraulic energy by utilizing hydraulic transmission, the hydraulic energy is converted into mechanical energy, the power converted for the second time is hydraulic energy, the power converted from the hydraulic energy can be continuously applied to a rock sample, and the influence of the continuous disturbance action of shock waves after explosive explosion on the rock can be well simulated; the problem that the test condition cannot be achieved due to icing of water flowing through a sample caused by the fact that water is used as a permeation medium under the low-temperature condition can be solved by using gas to replace water to apply the permeation pressure as the permeation medium; the device adopts hydraulic transmission to convert the mechanical energy of a motor into hydraulic energy, then converts the hydraulic energy into kinetic energy of a loading plate on the upper part of a sample chamber, the loading plate is always contacted with the upper part of the sample chamber, the converted kinetic energy is continuously applied to a rock sample, and continuous circulating dynamic load is applied to the rock sample; and the damage effect of high-frequency power on the instrument in the implementation process is reduced to the maximum extent through two times of power conversion, the stability of the instrument is effectively maintained, and the damage of impact or impact on the equipment is avoided.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
in the figure: 1. a rock sample; 11. a temperature cycle box A; 12. a temperature circulating liquid hose A; 13. an aluminum plate A; 21. a pneumatic valve A; 22. a cylinder A; 23. a pneumatic valve B; 24. a cylinder B; 31. an oil cylinder B; 32. a hydraulic valve; 41. an electric motor; 42. a piston rod; 43. a piston; 44. a liquid storage pressure bin; 45. a hydraulic valve; 46. an oil cylinder A; 47. a hydraulic hose; 48. a power converter; 49. a dowel bar; 410. a loading plate; 411. a rigid indenter.
Detailed Description
The process of the present invention is further illustrated by the following examples.
The method test is carried out by taking an end value and a middle value in the value ranges of the test temperature value, the confining pressure value and the osmotic pressure value, and three embodiments are provided.
The test method for the rock multi-field coupling rheological test under the action of the dynamic load provided by the embodiment 1 specifically comprises the following steps: placing a rock sample in a sample chamber of a triaxial rheological equipment, adjusting the temperature in the sample chamber to-28 ℃, controlling the confining pressure to 3Mpa, keeping the state for 30 minutes, applying constant air pressure on the top and the bottom of the sample chamber, wherein the air pressure at the top is greater than the air pressure at the bottom to generate constant air pressure difference, the air pressure difference is the osmotic pressure of the embodiment, and the osmotic pressure is controlled to be 0.2 Mpa; keeping the temperature, the confining pressure and the osmotic pressure stable until the test is finished, applying a cyclic vibration dynamic load which changes once in 1 second within the range of not more than 100Mpa and not more than 50hz to the rock sample in the axial direction, acquiring indoor temperature value, confining pressure value, osmotic pressure value, load change value and rock sample volume change value data of the sample through a sensor, and recording the dynamic stress change value and the volume change value of the rock sample once in 1 second under different test conditions;
the test method for the rock multi-field coupling rheological test under the action of the dynamic load provided by the embodiment 2 specifically comprises the following steps: controlling the temperature in a sample chamber to be 10 ℃, controlling the ambient pressure in the sample chamber to be 15MPa, keeping the state for 30 minutes, controlling the osmotic pressure in the sample chamber to be 0.5MPa, keeping the temperature, the ambient pressure and the osmotic pressure stable until the test is finished, applying a cyclic vibration dynamic load which changes once in 1 second within the range of not more than 100MPa in the axial direction and not more than 50hz to the rock sample, collecting the indoor temperature value, the ambient pressure value, the osmotic pressure value, the load change value and the volume change value data of the rock sample through a sensor, and recording the dynamic stress change value and the volume change value of the rock sample once in 1 second under different test conditions;
the test method for the rock multi-field coupling rheological test under the action of the dynamic load provided by the embodiment 3 specifically comprises the following steps: controlling the temperature in a sample chamber to be 50 ℃, controlling the confining pressure of the sample chamber to be 30Mpa, keeping the state for 30 minutes, controlling the seepage pressure in the sample chamber to be 1Mpa, keeping the temperature, the confining pressure and the seepage pressure stable until the test is finished, applying a cyclic vibration dynamic load which changes once in 1 second within the range of axial direction not more than 100Mpa and not more than 50hz to the rock sample, collecting the value of temperature, the confining pressure, the seepage pressure, the load change value and the volume change value data of the rock sample in the sample chamber through a sensor, and recording the dynamic stress change value and the volume change value of the rock sample under different test conditions once in 1 second;
obtaining a relation function between dynamic stress strain change, volume strain change and time through the dynamic stress strain change and the volume strain change of the rock sample measured by the three embodiments; the temperature value, the confining pressure value and the osmotic pressure value selected in the three embodiments are end values and intermediate values of the test conditions, and values are all values in the range in the actual test process.
The dynamic load of the test method is generated as follows: the rotary motion of the motor is converted into linear reciprocating motion through a crank connecting rod mechanism, the crank connecting rod mechanism drives a piston positioned in a cylinder body to apply force to liquid in the cylinder body, and the cyclic vibration dynamic load is applied to a rock sample by hydraulic transmission; the kinetic energy converted for the first time is an impact effect, the kinetic energy converted for the second time is a continuous application effect, the continuous dynamic load application can not be realized through the primary power conversion, and the continuous dynamic load disturbance influence is applied to the rock sample through the secondary kinetic energy conversion.
The test method can test the relation of stress and strain changing along with time under the independent or combined action of different shock waves, different osmotic pressures, different temperatures and different confining pressures after the rock sample is exploded, and the test mode load application is more accurate, so that the stability problem of the rock under the independent or combined action of the shock waves, rainfall and freeze-thaw cycles after the rock is exploded is solved.
The device of the invention is further described below with reference to the figures and examples.
Example 4, as shown in the attached drawing, the multi-field coupling rheological test equipment for rock under the action of dynamic load is as follows: the device at least comprises a triaxial rheological test device, wherein a load loading mechanism is connected to the top end of a sample chamber of the triaxial rheological test device, and the load loading mechanism comprises a power output unit, a hydraulic transmission unit and a load output unit;
the power output unit at least comprises a motor 41 and a crank connected with the motor, and the crank converts the rotary motion of the motor into linear reciprocating motion; the load output unit at least comprises a dowel bar 49 and a loading plate 410 connected with the dowel bar 49, the loading plate 410 is in contact with a rigid pressure head 411 at the top of the sample chamber, and the dowel bar 49 pushes the loading plate 410 to press the rigid pressure head 411 at the top of the sample chamber to load the rock sample 2; the hydraulic transmission unit at least comprises a cylinder body A and a power converter 48, hydraulic oil is filled in a liquid storage pressure bin 44 at the lower part of a piston A43 in the cylinder body A, a piston rod 42 fixed on the upper surface of the piston A43 is connected with a crank, the crank drives the piston rod 42 to do reciprocating linear motion after a motor 41 is started to push the piston A43, a hydraulic valve 45 is arranged on an oil supply pipe at the side part of the liquid storage pressure bin 44, the oil supply pipe is communicated with the liquid storage pressure bin 44 and the oil cylinder A46, the hydraulic valve 45 is a two-way valve, and the liquid in the liquid storage pressure bin is controlled; the power converter 48 comprises a cylinder B and a piston B positioned in the cylinder B, and the lower surface of the piston B is connected with a dowel bar 49; the lower portion of the liquid storage pressure bin 44 is communicated with the upper portion of the cylinder body B through a hydraulic hose 47, the crank drives the piston A43 to extrude hydraulic oil in the liquid storage pressure bin 44, the hydraulic oil is conveyed to the upper portion of the piston B in the cylinder body B through the hydraulic hose 47, the hydraulic oil extrudes the piston B to enable the dowel bar 49 fixed on the lower surface of the piston B to push the loading plate 410, the loading plate extrudes a rigid pressure head above a rock sample to apply dynamic load to the rock sample, and the loading plate 410 is always in contact with the rigid pressure head 411 in the implementation process to continuously apply the dynamic load to the rock sample.
The top and the bottom of a sample chamber of the triaxial rheological test device are connected with aluminum discs for adjusting the temperature in the sample chamber, the top aluminum disc A13 is communicated with a temperature circulating box A11 through two temperature circulating liquid hoses A12, one temperature circulating liquid hose A12 conveys circulating liquid with adjusted temperature in the temperature circulating box A11 to the aluminum disc A13, the temperature in the sample chamber is controlled by the diffusion and absorption of heat of the aluminum disc A, and the temperature circulating liquid flowing through the aluminum disc A13 flows back to the temperature circulating box A11 through the other temperature circulating liquid hose A12; the bottom aluminum disc B16 is communicated with a temperature circulating box B14 through two temperature circulating liquid hoses B15, the working process is consistent with that of the upper temperature change unit, and the temperature in the sample chamber is regulated and controlled under the combined action; the temperature cycle box includes at least: cylinder body, heating rod and condenser pipe.
The top and the bottom of a sample chamber of the triaxial rheological test device are communicated with vent pipes, the top vent pipe is communicated with an air cylinder A22, the vent pipe is provided with an air pressure valve A21, the bottom vent pipe is communicated with an air cylinder B24, and the vent pipe is provided with an air pressure valve B23; the cylinder A outputs gas, the pressure is controlled by the pressure valve A21, constant pressure is generated at the top of the sample chamber, the pressure is maintained to be stable, the cylinder B24 outputs gas, the pressure is controlled by the pressure valve B23, the pressure is maintained to be stable, the pressure at the top is higher than that at the bottom, the generated constant pressure difference is the osmotic pressure value of the embodiment, and the problem that water icing cannot meet the test conditions under the low-temperature condition can be solved by replacing water with gas.
The side part of the sample chamber is connected with an oil pipe, the oil pipe is connected with an oil cylinder B31, a hydraulic valve 32 is arranged on the oil pipe, the oil cylinder B31 inputs hydraulic oil into the sample chamber through the oil pipe, the hydraulic valve 32 on the oil pipe controls the inflow and outflow of the hydraulic oil, and the pressure of the hydraulic oil on the rock sample is used for simulating the confining pressure effect of the rock sample on soil and surrounding rock masses in the actual working condition.
Claims (7)
1. A testing method for a rock multi-field coupling rheological test under the action of dynamic load is characterized by comprising the following steps: placing a rock sample in a sample chamber of a triaxial rheological test, controlling the temperature of the sample chamber to be minus 30-50 ℃, controlling the confining pressure of the sample chamber to be not more than 30MPa, controlling the osmotic pressure of the sample chamber to be not more than 1MPa, and applying a cyclic vibration dynamic load with the axial direction not more than 100MPa and not more than 50hz at the top end of the rock sample to carry out a triaxial rheological test; measuring the change values of dynamic stress strain and volume deformation of the rock sample along with time under the action of dynamic load; the cyclic vibration dynamic load is generated in such a way that the rotary motion of the motor is converted into linear reciprocating motion through the crank-link mechanism, the crank-link mechanism drives the piston A in the cylinder A to apply force to the liquid in the cylinder A, and the cyclic vibration dynamic load is applied to the rock sample by utilizing hydraulic transmission, the cylinder B and the piston B in the cylinder B.
2. The test method for the rock multi-field coupling rheological test under the action of the dynamic load according to claim 1, which is characterized by comprising the following steps: and obtaining a relation function among the dynamic stress strain change, the volume change and the time according to the measured dynamic stress strain and the change value of the body change along with the time under the action of the dynamic load.
3. The method for testing the multi-field coupling rheological test of the rock under the action of the dynamic load according to claim 1, which is characterized by comprising the following steps of: the temperature in the sample chamber is adjusted by controlling the temperature of the top end and the bottom end of the sample chamber, and the temperature in the sample chamber is controlled to be-30-50 ℃; inputting hydraulic liquid into the sample chamber to produce confining pressure, wherein the confining pressure is controlled to be not more than 30 Mpa; applying constant air pressure to the top end and the bottom end of the sample chamber, wherein the air pressure of the top end is greater than that of the bottom end, generating constant air pressure difference to form osmotic pressure, and controlling the osmotic pressure to be not more than 1 MPa; applying a cyclic vibration dynamic load with the axial direction not more than 100MPa and not more than 50hz to the rock sample; and measuring the change values of the dynamic stress strain and the volume deformation of the rock sample along with time under the action of dynamic load.
4. A test device for the multi-field coupling rheological test of the rock under the action of the dynamic load of claim 1, which at least comprises a triaxial rheological test device, and is characterized in that: the top end of the sample chamber is connected with a load loading mechanism, and the load loading mechanism comprises a power output unit, a hydraulic transmission unit and a load output unit;
the power output unit at least comprises a motor and a crank connected with the motor;
the load output unit at least comprises a dowel bar and a loading plate connected with the dowel bar, and the loading plate is in contact with the upper surface of the sample chamber;
the hydraulic transmission unit at least comprises a cylinder body A and a power converter, hydraulic oil is filled in a liquid storage pressure bin at the lower part of a piston A in the cylinder body A, a piston rod fixed on the upper surface of the piston A is connected with a crank, a hydraulic valve is arranged on an oil supply pipe at the side part of the liquid storage pressure bin, and the oil supply pipe is communicated with the liquid storage pressure bin and an oil cylinder A; the power converter comprises a cylinder body B and a piston B positioned in the cylinder body B, and the lower surface of the piston B is connected with the dowel bar; the lower part of the liquid storage pressure bin is communicated with the upper part of the cylinder body B through a hydraulic hose.
5. The device for testing the multi-field coupling rheological test of the rock under the action of the dynamic load according to claim 4, is characterized in that: triaxial rheological test device's sample room top and bottom are connected with the aluminium dish that is used for adjusting the indoor temperature of sample, and top aluminium dish A is connected with temperature cycle case A through two temperature cycle liquid hoses A, and bottom aluminium dish B communicates with temperature cycle case B through two temperature cycle liquid hoses B, and the temperature cycle case includes at least: cylinder body, heating rod and condenser pipe.
6. The device for testing the multi-field coupling rheological test of the rock under the action of the dynamic load according to claim 4, is characterized in that: the top and the bottom of a sample chamber of the triaxial rheological test device are communicated with vent pipes, the top vent pipe is communicated with an air cylinder A, the vent pipe is provided with an air pressure valve A, the bottom vent pipe is communicated with an air cylinder B, and the vent pipe is provided with an air pressure valve B.
7. The device for testing the multi-field coupling rheological test of the rock under the action of the dynamic load according to claim 4, is characterized in that: and an oil pipe is connected to the side part of a sample chamber of the triaxial rheological test device, the oil pipe is communicated with the oil cylinder B, and a hydraulic valve is arranged on the oil pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011201113.XA CN112326476A (en) | 2020-11-02 | 2020-11-02 | Testing method and device for rock multi-field coupling rheological test under action of dynamic load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011201113.XA CN112326476A (en) | 2020-11-02 | 2020-11-02 | Testing method and device for rock multi-field coupling rheological test under action of dynamic load |
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| Publication Number | Publication Date |
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| CN112326476A true CN112326476A (en) | 2021-02-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986026A (en) * | 2021-02-19 | 2021-06-18 | 长江水利委员会长江科学院 | High-frequency high-load cyclic dynamic load test device and method for rock |
| CN113655303A (en) * | 2021-07-13 | 2021-11-16 | 成都思科瑞微电子股份有限公司 | Test system and test method for AD converter with 204B protocol |
| CN115420619A (en) * | 2022-09-19 | 2022-12-02 | 四川大学 | High-flux rock multi-field coupling test system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699196A (en) * | 2016-01-28 | 2016-06-22 | 河海大学 | Rock seepage-stress-temperature-chemical coupling rheological testing device and method |
| WO2016110067A1 (en) * | 2015-01-08 | 2016-07-14 | 中国矿业大学 | True triaxial multi-field multi-phase coupling dynamic test system and method |
| CN207379894U (en) * | 2017-10-30 | 2018-05-18 | 上海中交水运设计研究有限公司 | Simulate multispecimen Dynamic loading test machine under the corrosive environment of coastal waters |
| US20180313727A1 (en) * | 2016-12-20 | 2018-11-01 | Northeastern University | Test apparatus and method for determining time-dependence failure under constant temperature through high pressure true triaxial loading for hard rock |
| CN109752306A (en) * | 2019-03-22 | 2019-05-14 | 中国科学院武汉岩土力学研究所 | Dynamic load perturbation process rock permeability test method and its test macro |
| CN110082277A (en) * | 2019-05-28 | 2019-08-02 | 辽宁工程技术大学 | It is a kind of can periodic perturbation three axis multiphase porous flow experimental rig of coal petrography and test method |
-
2020
- 2020-11-02 CN CN202011201113.XA patent/CN112326476A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016110067A1 (en) * | 2015-01-08 | 2016-07-14 | 中国矿业大学 | True triaxial multi-field multi-phase coupling dynamic test system and method |
| CN105699196A (en) * | 2016-01-28 | 2016-06-22 | 河海大学 | Rock seepage-stress-temperature-chemical coupling rheological testing device and method |
| US20180313727A1 (en) * | 2016-12-20 | 2018-11-01 | Northeastern University | Test apparatus and method for determining time-dependence failure under constant temperature through high pressure true triaxial loading for hard rock |
| CN207379894U (en) * | 2017-10-30 | 2018-05-18 | 上海中交水运设计研究有限公司 | Simulate multispecimen Dynamic loading test machine under the corrosive environment of coastal waters |
| CN109752306A (en) * | 2019-03-22 | 2019-05-14 | 中国科学院武汉岩土力学研究所 | Dynamic load perturbation process rock permeability test method and its test macro |
| CN110082277A (en) * | 2019-05-28 | 2019-08-02 | 辽宁工程技术大学 | It is a kind of can periodic perturbation three axis multiphase porous flow experimental rig of coal petrography and test method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986026A (en) * | 2021-02-19 | 2021-06-18 | 长江水利委员会长江科学院 | High-frequency high-load cyclic dynamic load test device and method for rock |
| CN112986026B (en) * | 2021-02-19 | 2023-06-30 | 长江水利委员会长江科学院 | Rock high-frequency high-load cyclic dynamic load test device and test method |
| CN113655303A (en) * | 2021-07-13 | 2021-11-16 | 成都思科瑞微电子股份有限公司 | Test system and test method for AD converter with 204B protocol |
| CN113655303B (en) * | 2021-07-13 | 2024-02-27 | 成都思科瑞微电子股份有限公司 | AD converter testing system with 204B protocol and testing method thereof |
| CN115420619A (en) * | 2022-09-19 | 2022-12-02 | 四川大学 | High-flux rock multi-field coupling test system |
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