CN108548766B - Rock mass transient unloading infiltration pressing response simulation experimental rig based on magnetoelectricity control - Google Patents
Rock mass transient unloading infiltration pressing response simulation experimental rig based on magnetoelectricity control Download PDFInfo
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- CN108548766B CN108548766B CN201810316730.0A CN201810316730A CN108548766B CN 108548766 B CN108548766 B CN 108548766B CN 201810316730 A CN201810316730 A CN 201810316730A CN 108548766 B CN108548766 B CN 108548766B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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
Abstract
The present invention proposes a kind of rock mass transient unloading infiltration pressing response simulation experimental rig based on magnetoelectricity control, including loading module, test specimen module, monitoring modular and hydraulic station, loading module includes supporting table, load cylinder and load cylinder, test specimen module includes jointed rock mass sample, confining pressure component and water filling component, confining pressure and injection high pressure water can be applied to jointed rock mass sample respectively, monitoring modular includes computer, data acquisition device and video camera, data acquisition device is set on jointed rock mass sample, it is connected by cable with computer, simulation process is monitored, video camera shooting record test process, hydraulic station is connected with load cylinder and confining pressure component.The present invention can get information about strain, displacement and the Vibration Condition in jointed rock mass sample transient unloading flow event, strain rate of the jointed rock mass sample type in off-load is improved, transient unloading infiltration pressing response problem of jointed rock mass sample under the conditions of high confining pressure and hypertonic pressure is effectively studied.
Description
Technical field
The invention belongs to the technical field of geotechnical engineering model test more particularly to a kind of rock mass winks based on magnetoelectricity control
State off-load infiltration pressing response simulation experimental rig.
Background technique
Construction of hydropower stations addressing is respectively positioned on high region of FuShui, and off-load often with the presence of high pressure seepage flow, is excavated in deep rock mass inside
Interaction is generated with structural plane during stress wave is propagated in country rock, so that structural plane generates normal direction and tangential vibrations,
And then generate and loosen, sliding, cracking, and induce the increase of seepage channel, promote the development of seepage field；And the development of seepage field
Further lead to further expanding for structural plane filler characteristic variations and structural plane, leads to the deterioration and deformation of Analysis of Field Geotechnical Parameters
Increase, and exacerbate deformation after unloading rate, hide some dangers for the underground power house safety and stability of construction and run phrase.Therefore, exist
When the surrouding rock deformation stable problem in unloading process is excavated in research, need to consider dynamic load and enclosing under seepage field coupling
Rock deformation damage evolution problem.
However, be all in the past by the method for theory analysis and numerical simulation to related jointed rock mass model in high confining pressure and
Transient unloading infiltration pressing response problem under the conditions of hypertonic pressure is studied, and jointed rock mass model cannot be all got information about
Strain, displacement and Vibration Condition in transient unloading flow event.And the pilot system off-load speed of existing excavation simulation off-load
Rate is again relatively slow, quick removal can not be carried out to load suffered in jointed rock mass model test piece, so jointed rock mass model
Strain rate in off-load is lower, does not meet actual off-load situation in engineering.
Summary of the invention
The technical problem to be solved by the invention is to solve the above problems provide it is a kind of based on magnetoelectricity control
Rock mass transient unloading infiltration pressing response simulation experimental rig, can be by changing osmotic pressure head size, crustal stress static load size
And transient unloading peak value size research is under different fill conditions, communicating structure face filler mechanical characteristic and jointed rock mass model
Loosening under seepage flow-dynamic stress coupling deforms time space distribution.
The technical proposal adopted by the invention to solve the above technical problems is that: the rock mass transient unloading based on magnetoelectricity control seeps
Mobilization force response simulation experimental rig, which is characterized in that including loading module, test specimen module, monitoring modular and hydraulic station, load
Module includes supporting table, load cylinder and load cylinder, and load groove is opened up at the top of the supporting table, and load groove outboard end is equipped with
First counter-force pier, the load cylinder and load cylinder are sequentially arranged in load groove, are connected by piston rod, outside load cylinder
Side offsets with the first counter-force pier, and the test specimen module includes jointed rock mass sample, confining pressure component and water filling component, the confining pressure
Component is coated at the jointed rock mass sample, and the water filling component includes water-injection steel pipe and water pump, confining pressure component both ends respectively with
Supporting table and the second counter-force pier offset, and described water-injection steel pipe one end is closed end, sequentially pass through the second counter-force pier, jointed rock mass examination
Sample and load cylinder are connected with the piston rod, and the other end is connected with the water pump, and the monitoring modular includes that computer, data are adopted
Acquisition means and video camera, the data acquisition device is set on jointed rock mass sample, is connected by cable with computer, described to take the photograph
Camera shooting record test process, the hydraulic station are connected with load cylinder and confining pressure component.
According to the above scheme, the piston rod is located at one end in the load cylinder equipped with first piston, is located at described
The other end loaded in cylinder is equipped with second piston, and piston rod is hollow structure, and described water-injection steel pipe one end configures phase with inner cavity
Even, piston rod other end end is arranged iron hoop, the fixed cyclic annular electromagnet in load cylinder one end, the internal diameter of the ring-type electromagnet and work
The outer diameter phase configuration of stopper rod, cyclic annular electromagnet are connected by cable with DC voltage controller.
According to the above scheme, the confining pressure component includes steel cylinder and ring-shaped rubber capsule, and ring-shaped rubber capsule coats the joint rock
Body sample is placed in inside steel cylinder, steel cylinder aperture setting corresponding with the oil transportation hole of ring-shaped rubber capsule.
According to the above scheme, the hydraulic station includes that fuel tank, oil pump, the first high-pressure oil pipe, the second high-pressure oil pipe and third are high
Pressuring oil pipe, fuel tank are connected by petroleum pipeline and oil return pipe with oil pump, and oil pump is connected with the first, second, third high-pressure oil pipe respectively,
First, second high-pressure oil pipe is connected with the both ends of load cylinder respectively, and third high-pressure oil pipe passes through steel pipe aperture and annular rubber
The oil transportation hole of capsule is connected, and the first high-pressure oil pipe is equipped with the first oil pressure gauge and the first control valve, sets on the second high-pressure oil pipe
There are the second oil pressure gauge and the second control valve, third high-pressure oil pipe is equipped with third oil pressure gauge and third control valve.
According to the above scheme, engaging dress is respectively equipped in the end face outside of the inner side end of the load cylinder and load cylinder
It sets, the clamping close device is made of the retainer ring and card slot of phase configuration.
According to the above scheme, the data acquisition device includes strain gauge, the pressure biography that jointed rock mass sample outer peripheral surface is installed
Sensor, the osmotic pressure force snesor and vibrating sensor that inner peripheral surface is installed, the inbuilt acceleration sensing inside jointed rock mass sample
Device and displacement sensor.
According to the above scheme, the water-injection steel pipe is located at the part in jointed rock mass sample and is evenly distributed with water injection hole.
The beneficial effects of the present invention are: 1, provide it is a kind of based on magnetoelectricity control rock mass transient unloading infiltration pressing respond mould
Quasi- experimental rig, the deficiency of high-speed off-load can not be simulated for previous experimental method, realized under different confining pressures and different
Under osmotic pressure on jointed rock mass model load and consolidation pressure quick removal so that jointed rock mass model generate it is biggish vibration and
Strain rate, the case where more meeting jointed rock mass model transient unloading in Practical Project；2, it may be implemented to high-ground stress and hypertonic
The simulation of jointed rock mass model transient unloading process under the conditions of pressure, and by jointed rock mass model in transient unloading loose item
Strain monitoring, vibration monitoring, pressure monitoring, acceleration monitoring, consolidation pressure monitoring, displacement monitoring and high-speed photography under part, are visited
The influence that bright crustal stress transient unloading loosens jointed rock mass model from different osmotic pressures discloses jointed rock mass model in crustal stress wink
Mechanical behavior under the conditions of state unloading loose, to understand high-ground stress transient unloading under the conditions of rock-mass relaxing rule and rock mass open
It is significant to dig engineering construction；3, strata model is made of the rock-like materials material of different mixture ratio, can pass through change
Rock-like materials match ratio changes the mechanics parameters such as its elasticity modulus, Poisson's ratio, compression strength, to simulate different mechanics
The jointed rock mass model of parameter.
Detailed description of the invention
Fig. 1 is the front view of one embodiment of the invention.
Fig. 2 is the top view of one embodiment of the invention.
Wherein: 1. supporting tables, 2. load cylinders, 3. load cylinders, 4. load grooves, 5. first counter-force piers, 6. second counter-forces
Pier, 7. piston rods, 8. jointed rock mass samples, 9. water-injection steel pipes, 10. water pumps, 11. first pistons, 12. second pistons, 13. iron
Ring, 14. cyclic annular electromagnet, 15. DC voltage controllers, 16. steel cylinders, 17. ring-shaped rubber capsules, 18. fuel tanks, 19. oil pumps, 20.
First high-pressure oil pipe, 21. second high-pressure oil pipes, 22. third high-pressure oil pipes, 23. petroleum pipelines, 24. oil return pipes, 25. first oil pressure
Table, 26. first control valves, 27. second oil pressure gauges, 28. second control valves, 29. third oil pressure gauges, 30. third control valves, 31.
Retainer ring, 32. card slots.
Specific embodiment
For a better understanding of the invention, with reference to the accompanying drawings and examples to further description of the present invention.
As shown in Figs. 1-2, the present invention provides a kind of rock mass transient unloading infiltration pressings based on magnetoelectricity control to respond mould
Quasi- experimental rig, including loading module, test specimen module, monitoring modular and hydraulic station, loading module include supporting table 1, load oil
Cylinder 2 and load cylinder 3, open up load groove 4 at the top of supporting table, and load groove outboard end is equipped with the first counter-force pier 5, load cylinder and
Load cylinder is sequentially arranged in load groove, is connected by piston rod 7, and the outboard end of load cylinder offsets with the first counter-force pier, examination
Part module includes that jointed rock mass sample 8, confining pressure component and water filling component, confining pressure component are coated at jointed rock mass sample, water filling group
Part includes water-injection steel pipe 9 and water pump 10, and confining pressure component both ends offset with supporting table and the second counter-force pier 6 respectively, water-injection steel pipe one
End is closed end, sequentially passes through the second counter-force pier, jointed rock mass sample and load cylinder and is connected with piston rod, the other end and water pump phase
Even, water-injection steel pipe is located at the part in jointed rock mass sample and is evenly distributed with water injection hole, provides hypertonic pressure for jointed rock mass model, monitors mould
Block includes computer, data acquisition device and video camera, and data acquisition device is set on jointed rock mass sample, passes through cable and meter
Calculation machine is connected, and video camera shooting record test process, hydraulic station is connected with load cylinder and confining pressure component.
Piston rod is located at one end in load cylinder equipped with first piston 11, and the other end in load cylinder is equipped with
Second piston 12, piston rod are hollow structure, and water-injection steel pipe one end is connected with inner cavity configuration, and piston rod other end end is arranged iron
Ring 13, the fixed cyclic annular electromagnet 14 in load cylinder one end, the internal diameter of cyclic annular electromagnet and the outer diameter phase configuration of piston rod, cyclic annular electromagnetism
Tie Tong crosses cable and is connected with DC voltage controller 15.
Confining pressure component includes steel cylinder 16 and ring-shaped rubber capsule 17, and ring-shaped rubber capsule cladding jointed rock mass sample is placed in steel cylinder
Portion, steel cylinder aperture setting corresponding with the oil transportation hole of ring-shaped rubber capsule.
Hydraulic station includes fuel tank 18, oil pump 19, the first high-pressure oil pipe 20, the second high-pressure oil pipe 21 and third high-pressure oil pipe
22, fuel tank is connected by petroleum pipeline 23 and oil return pipe 24 with oil pump, and oil pump is connected with the first, second, third high-pressure oil pipe respectively,
First, second high-pressure oil pipe is connected with the both ends of load cylinder respectively, and third high-pressure oil pipe passes through steel pipe aperture and annular rubber
The oil transportation hole of capsule is connected, and the first high-pressure oil pipe is equipped with the first oil pressure gauge 25 and the first control valve 26, the second high-pressure oil pipe
It is equipped with the second oil pressure gauge 27 and the second control valve 28, third high-pressure oil pipe is equipped with third oil pressure gauge 29 and third control valve
30。
It is respectively equipped with clamping close device in the inner side end of load cylinder and the end face outside of load cylinder, clamping close device is by matching
Retainer ring 31 and card slot 32 composition set can make load cylinder be connected with load cylinder in unloading, prevent to jointed rock mass sample
Collide pressurization.
Data acquisition device includes strain gauge, the pressure sensor that jointed rock mass sample outer peripheral surface is installed, and inner peripheral surface is installed
Osmotic pressure force snesor and vibrating sensor, inbuilt acceleration transducer and displacement sensor inside jointed rock mass sample.
Strain gauge is used to measure and record the strain variation of rock mass sample, and monitoring data are sent to computer；Vibrating sensor is used
Change to measure and record the vibration velocity of rock mass sample, and monitoring data are sent to computer；Pressure sensor is used to survey
The pressure change of jointed rock mass sample is measured and recorded, and monitoring data are sent to computer；Acceleration transducer is used to measure
And the vibration acceleration variation of rock mass sample is recorded, and monitoring data are sent to computer；Displacement sensor is used to measure simultaneously
The change in displacement of rock mass sample is recorded, and monitoring data are sent to computer；Osmotic pressure force snesor is used to measure and record rock
The consolidation pressure of body sample changes, and monitoring data are sent to computer；The DC voltage controller of electromagnet exterior is set
And its voltage change for being used to measure and record electromagnet of connection, and by the way that monitoring data are sent to computer；Computer
Data are received, stores and analyzes experimental data collected.
The course of work of the invention is as follows:
Firstly, sticking strain gauge, pressure sensor in jointed rock mass sample outer surface, inner surface sticks consolidation pressure sensing
Device, and arrange vibrating sensor, acceleration transducer, displacement sensor, strain gauge, pressure are buried inside jointed rock mass model
Sensor, vibrating sensor, acceleration transducer, displacement sensor；Jointed rock mass sample is placed in ring-shaped rubber capsule
Portion, and they are put into togerther in steel cylinder；Load cylinder is placed on inside loading device supporting table load groove slot, is allowed to
Free to slide, load cylinder effect end side is aligned with jointed rock mass sample.Load cylinder is fixed in load groove, and is passed through
Piston rod is connected with load cylinder.It places video camera and adjusts its items setting；It opens all devices in monitoring system and sets
It is standby, and the initial value of each device and equipment is recorded, to be compared with the numerical value after experiment.
Then, filling liquid pressure oil is carried out to ring-shaped rubber capsule by oil pump, third high-pressure oil pipe, and passes through the control of third oil pressure gauge
The size of the intracapsular oil pressure of ring-shaped rubber processed, load cylinder contraction connects electromagnet and iron hoop closely mutually, then using hydraulic
It stands and the high pressure liquid pressure oil in fuel tank is sent into load cylinder through the first high-pressure oil pipe, so that piston rod is pushed to be displaced outwardly, piston
Bar travels forward together with load cylinder.Load cylinder travels forward and passes through effect end and jointed rock mass sample contacts, applies pressure
Load, generates pulling force effect at this time between second piston and electromagnet, control hydraulic station to load constant magnitude.Pass through test specimen
On dynamic pressure force snesor measure and load size on current test specimen, pressured state before excavation simulation.Pass through DC voltage controller
The DC voltage size and rate of change on electromagnet are controlled, to control the separation process between electromagnet and iron hoop, finally
Realize the simulation of transient unloading.
Finally, the high pressure liquid pressure oil in fuel tank is sent into load cylinder through the second high-pressure oil pipe by hydraulic station, to push away
Piston bar drives load cylinder to return to initial position to contract, and by the hydraulic oil in load cylinder through the first high-pressure oil pipe
It sends back in hydraulic station fuel tank, closes the oil pump in hydraulic station.
Hydraulic station working principle is as follows:
The high pressure liquid pressure oil in hydraulic station fuel tank is sent into load cylinder via the second high-pressure oil pipe by hydraulic station, from
And push piston rod to contract, and the hydraulic oil in load cylinder is sent back in hydraulic station fuel tank via the first high-pressure oil pipe,
Adjust iron hoop on piston rod to can be with the close-connected position of electromagnet.
Then, starting hydraulic station carries out the load that Slow loading is needed to experiment, record to load cylinder and ring-shaped rubber capsule
The degree and voltage value of third oil pressure gauge at this time closes high-pressure hydraulic pump, after the intracapsular hydraulic oil of ring-shaped rubber is stablized, by steel
Cylinder and ring-shaped rubber capsule are successively removed, and jointed rock mass sample is taken out.And the monitoring number saved using the computer in monitoring system
According to, oil pressure gauge degree, voltmeter degree, to jointed rock mass sample unloading infiltration pressing response simulate.
It is as follows by working principle of the hydraulic station to jointed rock mass sample Slow loading:
First load cylinder contraction connect electromagnet and iron hoop closely mutually, then using hydraulic station control piston rod with
Load cylinder travels forward together, and is in contact by effect end with jointed rock mass sample, applies compressive load, at this time second piston
Pulling force effect is generated between electromagnet, control hydraulic station to load constant magnitude, while observing the oil pressure gauge in hydraulic station
Variation.
By adjusting water pump, the numerical value of hydraulic station third control valve, to keep country rock seepage flow size, jointed rock mass confining pressure steady
It is fixed, then influence of the load peak change to jointed rock mass relaxation effect is considered by changing voltage peak size.Wherein shake
Dynamic sensor, acceleration transducer, displacement sensor and strain gauge etc. are used to record the relaxation effect of jointed rock mass.
The numerical value of hydraulic station third control valve, the voltage peak size of electromagnet is adjusted, to make jointed rock mass confining pressure, load
Peak change is stablized, and then considers that seepage force peak change loosens jointed rock mass by changing the size of country rock seepage pressure
The influence of effect.
By the size of DC voltage controller and water pump outside regulating magnet, make jointed rock mass transient unloading peak value
Stablize with Seepage of Jointed Rock Mass pressure, then considers to enclose around jointed rock mass by adjusting the size of hydraulic station third control valve
Press the influence to jointed rock mass relaxation effect
The voltage controller of adjustment hydraulic station third control valve, water pump and electromagnet makes jointed rock mass confining pressure, consolidation pressure
Stablize with unloading load peak holding, may then pass through the roughness between change different jointed rock mass internal structures face to examine
Consider influence of the confining pressure to jointed rock mass relaxation effect around jointed rock mass.
The voltage controller of adjustment hydraulic station third control valve, water pump and electromagnet makes jointed rock mass confining pressure, consolidation pressure
Stablize with unloading load peak holding, then makes between jointed rock mass internal structure face that roughness is smooth, change structural plane
Quantity, i.e. influence of the consideration different structure face quantity to jointed rock mass relaxation effect.
The voltage controller of adjustment hydraulic station third control valve, water pump and electromagnet makes jointed rock mass confining pressure, consolidation pressure
Stablize with unloading load peak holding, then becomes zero the quantity in jointed rock mass internal structure face, and grind using electron-microscope scanning
Study carefully the damage profile rule under the effect of rock mass transient unloading.
The rate that the Ampere force of electromagnet weakens can also be controlled, by voltage to study high, medium and low three kinds different unloadings
Influence of the rate to damage and relaxation effect.
Claims (7)
1. the rock mass transient unloading infiltration pressing response simulation experimental rig based on magnetoelectricity control, which is characterized in that including load
Module, test specimen module, monitoring modular and hydraulic station, loading module include supporting table, load cylinder and load cylinder, the supporting table
Top opens up load groove, and load groove outboard end is equipped with the first counter-force pier, and the load cylinder and load cylinder are sequentially arranged in and add
It carries in groove, is connected by piston rod, the outboard end of load cylinder offsets with the first counter-force pier, and the test specimen module includes joint
Rock mass sample, confining pressure component and water filling component, the confining pressure component are coated at the jointed rock mass sample, the water filling component packet
Water-injection steel pipe and water pump are included, confining pressure component both ends offset with supporting table and the second counter-force pier respectively, and described water-injection steel pipe one end is
Closed end sequentially passes through the second counter-force pier, jointed rock mass sample and load cylinder and is connected with the piston rod, the other end and the water
Pump is connected, and the monitoring modular includes computer, data acquisition device and video camera, and the data acquisition device is set to joint rock
On body sample, it is connected by cable with computer, the video camera shooting records test process, the hydraulic station and load cylinder
And confining pressure component is connected.
2. the rock mass transient unloading infiltration pressing response simulation experimental rig according to claim 1 based on magnetoelectricity control,
It is characterized in that, the piston rod is located at one end in the load cylinder equipped with first piston, it is located in the load cylinder
The other end be equipped with second piston, piston rod is hollow structure, and described water-injection steel pipe one end and inner cavity, which configure, to be connected, piston rod
Other end end is arranged iron hoop, the fixed cyclic annular electromagnet in load cylinder one end, the internal diameter of the ring-type electromagnet and piston rod it is outer
Diameter phase configuration, cyclic annular electromagnet are connected by cable with DC voltage controller.
3. the rock mass transient unloading infiltration pressing response simulation experimental rig according to claim 2 based on magnetoelectricity control,
It is characterized in that, the confining pressure component includes steel cylinder and ring-shaped rubber capsule, ring-shaped rubber capsule coats the jointed rock mass sample and sets
Inside steel cylinder, steel cylinder aperture setting corresponding with the oil transportation hole of ring-shaped rubber capsule.
4. the rock mass transient unloading infiltration pressing response simulation experimental rig according to claim 3 based on magnetoelectricity control,
It is characterized in that, the hydraulic station includes fuel tank, oil pump, the first high-pressure oil pipe, the second high-pressure oil pipe and third high-pressure oil pipe, oil
Case is connected by petroleum pipeline and oil return pipe with oil pump, and oil pump is connected with the first, second, third high-pressure oil pipe respectively, and first, second
High-pressure oil pipe is connected with the both ends of load cylinder respectively, and third high-pressure oil pipe passes through the oil transportation of steel cylinder aperture and ring-shaped rubber capsule
Hole is connected, and the first high-pressure oil pipe is equipped with the first oil pressure gauge and the first control valve, and the second high-pressure oil pipe is equipped with the second oil pressure
Table and the second control valve, third high-pressure oil pipe are equipped with third oil pressure gauge and third control valve.
5. the rock mass transient unloading infiltration pressing response simulation experimental rig according to claim 2 based on magnetoelectricity control,
It is characterized in that, being respectively equipped with clamping close device, the card in the end face outside of the inner side end of the load cylinder and load cylinder
It attaches together to set and be made of the retainer ring and card slot of phase configuration.
6. the rock mass transient unloading infiltration pressing response simulation experimental rig according to claim 3 based on magnetoelectricity control,
It is characterized in that, the data acquisition device includes strain gauge, the pressure sensor that jointed rock mass sample outer peripheral surface is installed, inner circumferential
The osmotic pressure force snesor and vibrating sensor that face is installed, inbuilt acceleration transducer and displacement pass inside jointed rock mass sample
Sensor.
7. the rock mass transient unloading infiltration pressing response simulation experimental rig according to claim 1 based on magnetoelectricity control,
It is characterized in that, the water-injection steel pipe, which is located at the part in jointed rock mass sample, is evenly distributed with water injection hole.
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| CN109297869A (en) * | 2018-11-14 | 2019-02-01 | 西南交通大学 | For the experimental rig of degradation mechanism containing fissure rock and method under water-rock interaction |
| CN109596501B (en) * | 2019-01-29 | 2023-08-22 | 辽宁工程技术大学 | Roof seepage test device and method under influence of dynamic load |
| CN110296928B (en) * | 2019-07-19 | 2022-04-08 | 三峡大学 | Device and method for simulating visual fracture seepage by using magnetofluid |
| CN112665996A (en) * | 2020-12-17 | 2021-04-16 | 武汉理工大学 | Electromagnetic transient unloading test system and method |
| CN113686694B (en) * | 2021-09-16 | 2022-05-24 | 中国矿业大学 | Three-dimensional rough crack surface unloading induced shear slip test device and method |
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| US5311766A (en) * | 1992-07-07 | 1994-05-17 | The United States Of America As Represented By The United States Department Of Energy | Method and apparatus for determining two-phase flow in rock fracture |
| CN102353762B (en) * | 2011-09-05 | 2014-01-15 | 武汉大学 | Transient unloading loose simulating system for excavating jointed rock mass |
| CN102287163B (en) * | 2011-09-08 | 2013-09-11 | 重庆市能源投资集团科技有限责任公司 | Drilling-sealing method and sealing device of coal mine underground ultrahigh pressure fracturing hole |
| CN104316447A (en) * | 2014-10-28 | 2015-01-28 | 中国矿业大学 | Fractured rock mass stress and seepage coupled testing system and method |
| CN105277379B (en) * | 2015-04-08 | 2017-10-24 | 武汉理工大学 | A kind of jointed rock mass excavates transient unloading loose simulating system under different confined pressures |
| CN104792562B (en) * | 2015-04-27 | 2017-07-11 | 武汉理工大学 | Underground chamber structural plane excavates transient unloading loose simulation experiment system |
| CN206057148U (en) * | 2016-07-29 | 2017-03-29 | 中国电建集团华东勘测设计研究院有限公司 | The test device that a kind of damage of rock is affected on penetrating power |
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