CN104483202B - A kind of high-ground stress and rock failure mechanism of rock pattern test system under hyperosmosis - Google Patents
A kind of high-ground stress and rock failure mechanism of rock pattern test system under hyperosmosis Download PDFInfo
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Abstract
The invention discloses rock failure mechanism of rock pattern test systems under a kind of high-ground stress and hyperosmosis, the system includes high-ground stress and the rock failure mechanism of rock model test test device and measuring technology under the conditions of hyperosmosis, test device includes the organic assembling of the capital equipments such as experimental sample installation system, high-ground stress application system, hyperosmosis application system, Experimental Control System, measurement and data collecting system, can test high-ground stress and the rock failure mechanism of rock mode and rock failure mechanism of rock development law under the conditions of hyperosmosis.
Description
Technical field
The invention belongs to rock fracture experiment apparatus fields more particularly to a kind of high-ground stress to break with rock under hyperosmosis
Bad pattern tests system.
Background technology
Rock failure mechanism of rock pattern refers to rock failure mode under certain condition and rock failure mechanism of rock development law, routinely sets
It is standby to meet high-ground stress and the rock failure mechanism of rock test request under the conditions of hyperosmosis.
The content of the invention
The embodiment of the present invention is designed to provide a kind of high-ground stress and rock failure mechanism of rock pattern test system under hyperosmosis
System, it is intended to solve the problems, such as that conventional equipment cannot meet high-ground stress and the rock failure mechanism of rock test request under the conditions of hyperosmosis.
The embodiment of the present invention is achieved in that a kind of high-ground stress and rock failure mechanism of rock pattern test system under hyperosmosis
Including under the conditions of high-ground stress and hyperosmosis hydraulic control system, pressure chamber body and load-bearing frame system, body become test system
System, grease converting system and dynamical system, computer control system.
Further, pressure chamber body and load-bearing frame system are made of load-bearing frame, pressure cylinder, confining pressure chamber body, on pressure cylinder
There is gas vent when infiltration outlet pipe, confining pressure chamber body water filling in portion, judges to indicate whether confining pressure chamber body confining pressure water fills, under pressure cylinder
There are confining pressure water filling and drainage pipeline, infiltration inlet channel in portion, and sample installation system comes directly towards including steel, and two grooves are arranged at top,
For placing sealing ring, there is water passage at top middle part, and for permeating water outflow, top lower part is fluted, is sealed for placing
Circle prevents infiltration water from being flowed out along around rock sample, and geotextiles, permeable steel plate are put in rock sample both ends successively；It is uniformly set above permeable steel plate
Fine permeable hole is put, infiltration hydraulic pressure is evenly distributed to rock sample end face；It is wrapped up outside rock sample by heat-shrink tube, power transmission column system, upper end
Fluted placement sealing ring, force-transmitting pole system head have annular tank, are moving carts below power transmission column system, can carry balancing gate pit
Body moves, by jack by pressure chamber body and one top lifting of trolley to appropriate location.
Further, between pressure chamber body top and load-bearing frame column, axis pressure sensor is installed, it will be axial suffered by rock sample
Load accurate response comes out, between pressure chamber body and load-bearing frame column, equipped with axial displacement grating, and when carrying out plus unloading,
It realizes Bit andits control or provides axial displacement for failure test.
Further, body becomes test system and is made of body change digital display meter, body change measuring instrument and body change tester；Body becomes tester
Cylinder bucket including mangneto linear displacement telescoping sensor, with infiltration inlet valve and flowing water Valve；Sensor includes electricity
Sub- storehouse, steel measuring staff, disconnected magnetic rings, measuring staff contain waveguide filament.
Further, grease converting system and dynamical system include three sealing steel tanks and hydraulic cylinder, motor and
High-pressure plunger pump, the steel tank of three sealings are respectively to permeate water accumulator, confining pressure water accumulator, accumulator；Permeate water storage
Energy device includes 100L water storage capsules, infiltration water entrance and hydraulic oil inlet and outlet；Confining pressure water accumulator include 25L water storage capsules,
Confining pressure water entrance and hydraulic oil inlet and outlet；Accumulator includes prepackage 5MPa nitrogen-sealeds capsule and seal capsule gas injection valve,
Hydraulic oil is filled between capsule and tank body in each accumulator.
Further, computer control system includes industrial personal computer, display, keyboard and mouse；Carry out controlling test and number
According to acquisition, measuring instrument gathered data is become by axial displacement grating, axial compressive force sensor and body, is stored by computer system
With processing, a variety of data real-time displays and preservation can be become to confining pressure, osmotic pressure, xial feed, axial compressive force, body；Confining pressure is led to
Cross constant speed loading, unloading is controlled with holding, and stress or Bit andits control are selected in axial direction, be respectively constant speed loading, unloading and
It keeps, osmotic pressure is kept.Computer system control is flexible, is set according to different tests purpose into line program.
Further, the high-ground stress and the test method of rock failure mechanism of rock pattern test system under hyperosmosis are as follows：
It whether damaged first looks into sealing ring, removes force-transmitting pole card slot sundries, dry sealing ring in rear enclosure；Permeable steel plate and sample
Both ends of the surface contact, and pad geotextiles make confining pressure liquid be separated with sample, moving cart is positioned, open control with heat-shrinkable T bush
Two valves of lifting system by cabinet open switch board axis pressure manual pressure valve and press switch board axis compressing cylinder ejection button, pressure
Power chamber body slowly declines, and when that will be contacted with pedestal, valve is turned down, reduces decrease speed, when the decline of pressure chamber body, bottom
When outside mimeograph is covered completely by nut, chamber body bottom is docked successfully；
Jack up pressure cylinder method：Two valves by first closing control cabinet, and another two valve is opened, then press control
Cabinet axis compressing cylinder ejects button, opens axis pressure manual pressure valve, when force-transmitting pole will be contacted with top pressure sensor, adjusts
Small pressurization changeover valve, makes moving cart slowly rise, when axial loading data acquisition table shows 10-20KN, closing axle pressure
Cylinder ejector button, closing axle pressure manual pressure valve, axial displacement is reset；
Confining pressure bladder water-filling method：Confining pressure Draw off valve is first closed, opens pressure cylinder upper discharge hole, confirms control
Then cabinet confining pressure output button processed opens balancing gate pit's Water injection tap, opens running water valve, pass through confining pressure water filling in closed state
Pipeline carries out confining pressure chamber body and is filled to osculum water outlet, and balancing gate pit fills, and closes osculum；Open the manual release of switch board confining pressure
Valve lays down oil pressure in tank body, is noted water into confining pressure bladder by running water pressure；Then, grease converting system is opened
Confining pressure output valve waits half an hours；
Permeate bladder water-filling method：In the water filling of confining pressure bladder simultaneously, infiltration bladder note is carried out
Water opens infiltration grease conversion Water filling valve, with 1 hour of running water pressure water filling, then Water filling valve closing；
Prepare before loading：Balancing gate pit's Water filling valve and switch board confining pressure manual pressure valve are closed, osculum is opened, is made
Confining pressure is reduced to 0, and then, switch board change-over switch is placed at 3, and computerized control pressuring method, and it is defeated to open switch board confining pressure
Go out and eject button with axis compressing cylinder.
Further, the high-ground stress and the controlling test of rock failure mechanism of rock pattern test system and test side under hyperosmosis
Method：Computer-controlled program is opened, off-duty loading procedure opens console emergency stop push button, motor is powered, by position
Displacement sensor is reset, and then, sets program loading command, and confining pressure is arranged to constant speed loading, carries out loading setting, axial to control
It is arranged to displacement and keeps 0mm, osmotic pressure is set manually, and confining pressure is loaded into predetermined value, confining pressure is arranged to hold mode, confining pressure is led to
Cross computer control；Then, infiltration grease conversion flowing water Valve is opened, by permeating outlet conduit, passes through servo-control system
Osmotic pressure loads, if rock sample water seepage, permeates water by pipeline, opens body and become measuring instrument inlet valve, measure, permeate
During stable water outlet, until progress axial compressive force is loaded onto sample destruction overall process completion.
The present invention provides high-ground stress and rock failure mechanism of rock pattern test system under hyperosmosis, can carry out up to 30MPa
Experiment test under the conditions of crustal stress and osmotic pressure can control and test high-ground stress and the rock failure mechanism of rock under the conditions of hyperosmosis
Overall process is tested, automatic data acquisition is carried out, can obtain high-ground stress by data processing and the destruction under the conditions of hyperosmosis is complete
Conditional curve, failure mode and destruction crack propagation law.
Description of the drawings
Fig. 1 is high-ground stress provided in an embodiment of the present invention and the structure of rock failure mechanism of rock pattern test system under hyperosmosis
Schematic diagram；
Fig. 2 is high-ground stress provided in an embodiment of the present invention and the sample installation system structure chart under the conditions of hyperosmosis；
In figure：1st, load-bearing frame；2nd, axis pressure sensor；3rd, pressure cylinder；4th, confining pressure chamber body；5th, confining pressure Draw off valve；6th, pass
Power column system；7th, axial displacement grating；8th, confining pressure water filling and drainage pipeline；9th, jack；10th, body becomes digital display meter；11st, electronics
Storehouse；12nd, body becomes tester；13rd, body becomes tester；14th, non-contact magnet ring；15th, inlet valve is permeated；16th, water discharging valve is permeated；
17th, water accumulator water storage capsule is permeated；18th, flowing water Valve is permeated；19th, grease conversion Water filling valve is permeated；20th, confining pressure delivery valve
Door；21st, water accumulator is permeated；22nd, confining pressure Manual pressure relief valve；23rd, sealing ring；24th, running water valve；25th, pressure chamber body and hold
Power frame system；26th, confining pressure water accumulator；27th, seal capsule gas injection valve；28th, body becomes test system；29th, accumulator；30、
The seal capsule of pre- inflated with nitrogen；31st, hydraulic cylinder；32nd, motor and high-pressure plunger pump；33rd, check valve；34th, confining pressure water energy storage
Device water storage capsule；35th, steel measuring staff；36th, grease converting system and dynamical system；37th, gas vent；38th, oil returning tube；39th, enclose
Pressure injection waterpipe；40th, outlet pipe is permeated；41st, inlet channel is permeated；42nd, water accumulator hydraulic oil inlet and outlet are permeated；43rd, confining pressure
Water accumulator hydraulic oil inlet and outlet；44th, confining pressure water entrance；45th, water entrance is permeated；46th, steel comes directly towards；47th, water was come directly towards
Passage；48th, permeable steel plate；49th, geotextiles；50th, rock sample；51st, heat-shrink tube；
Fig. 3 is rock failure mechanism of rock the Complete Curve schematic diagram provided in an embodiment of the present invention；
Fig. 4 is failure mode provided in an embodiment of the present invention and destroys crack extension schematic diagram.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Below in conjunction with the accompanying drawings and specific embodiment is further described the application principle of the present invention.
As depicted in figs. 1 and 2, rock failure mechanism of rock pattern tests system under the high-ground stress and hyperosmosis of the embodiment of the present invention
Mainly by load-bearing frame 1, axis pressure sensor 2, pressure cylinder 3, confining pressure chamber body 4, confining pressure Draw off valve 5, power transmission column system 6, axial direction
Displacement grating 7, confining pressure water filling and drainage pipeline 8, jack 9, body becomes digital display meter 10, electronics storehouse 11, body becomes tester 12, body becomes
Tester 13, non-contact magnet ring 14 permeate inlet valve 15, infiltration water discharging valve 16, permeate water accumulator water storage capsule 17, ooze
Penstock 18, infiltration grease conversion Water filling valve 19, confining pressure output valve 20, infiltration water accumulator 21, confining pressure is appeared to unload manually
Pressure valve 22, sealing ring 23, running water valve 24, pressure chamber body and load-bearing frame system 25, confining pressure water accumulator 26, seal capsule
Gas injection valve 27, body become test system 28, accumulator 29, the seal capsule 30 of pre- inflated with nitrogen, hydraulic cylinder 31, motor and height
Hydraulic plunger pump 32, check valve 33, confining pressure water accumulator water storage capsule 34, steel measuring staff 35, grease converting system and dynamical system
36th, gas vent 37, oil returning tube 38, confining pressure filling pipe 39, infiltration outlet pipe 40, infiltration inlet channel 41, infiltration water energy storage
Device hydraulic oil inlet and outlet 42, confining pressure water accumulator hydraulic oil inlet and outlet 43, confining pressure water entrance 44, infiltration water entrance 45, steel
System top 46, top water passage 47, permeable steel plate 48, geotextiles 49, rock sample 50, heat-shrink tube 51；
It is hydraulic lifting system positioned at load-bearing frame upper unit, middle part device is pressure chamber body, and lower device is hydraulic pressure
Jack；Hydraulic lifting system is responsible for adherence pressure chamber body during test specimen installation；Pressure chamber body includes the cavity of balancing gate pit, there is infiltration
Top force-transmitting pole at the top of the balancing gate pit of outlet has the pressure pedestal of infiltration import and confining pressure water entrance and containing infiltration
The lower part force-transmitting pole of passage；Pressurization place as test specimen includes：The confining pressure applied by balancing gate pit's cavity, is led to by hydraulic jack
The axis pressure that power transmission column system is provided and the osmotic pressure provided by infiltration lane in force-transmitting pole are provided；Hydraulic jack provides axis
To pressure, by being placed in the moving cart on top, axis pressure is passed into the pressure chamber body that is fixed in the above；Moving cart is responsible for transport
To facilitate, pressure chamber body is promoted pressure chamber body and test specimen is installed；Hydraulic jack, confining pressure water inlet, infiltration import and grease are converted
And dynamical system is connected；
Osmotic pressure is exported to be connected with body change test system；Body becomes test system, axial compressive force sensor, hydraulic control system
System is connected with computer control system；
In grease converting system and dynamical system, there is fuel tank, the oil pump being connected with fuel tank, oil pump passes through with accumulator
Check valve connects, and accumulator is by hydraulic control system to hydraulic jack for hydraulic oil, confining pressure water accumulator, infiltration accumulator
It is connected by hydraulic control system with accumulator, while confining pressure water accumulator, infiltration accumulator are also enclosed with pressure chamber body respectively
The mouth of a river is pressed into osmotic pressure water inlet to be connected.
In hydraulic control system, there are first, second, third static servo valve door and coupled corresponding
First, second, third solenoid directional control valve.First static servo valve door and the hydraulic jack of electromagnetic reverse valve control, that is, control
Axial compressive force, the second static servo valve door and electromagnetic reverse valve control confining pressure, the 3rd static servo valve door and solenoid directional control valve
Gate osmotic pressure processed.
Become in body in test system, there is the body being connected with body change measuring instrument to become test sensor.Body becomes test sensor
It is connected with infiltration water outlet.
Body is become measuring instrument, axial compressive force sensor, shaft position sensor by computer control system by cable
Data are acquired and preserve, and are reached by the connection with hydraulic control system to confining pressure, the loading of axis pressure, the control unloaded.
As shown in Figure 1, a kind of high-ground stress invented mainly is wrapped with rock failure mechanism of rock pattern test system under hyperosmosis
Include hydraulic control system, pressure chamber body and load-bearing frame system under the conditions of high-ground stress and hyperosmosis, body becomes test system,
Under the conditions of the test control systems such as grease converting system and dynamical system, computer control system and high-ground stress and hyperosmosis
Measuring technology method, each subsystem organic assembling, structure with form it is as follows：
Pressure chamber body and load-bearing frame system are made of load-bearing frame 1, pressure cylinder 3, confining pressure chamber body 4, and pressure cylinder top has
The gas vent 37 when outlet pipe 40, confining pressure chamber body water filling is permeated, gas vent can be made to judge to mark whether confining pressure chamber body confining pressure water fills
Will.Confining pressure water filling and drainage pipeline 8, infiltration inlet channel 41 are arranged at pressure cylinder lower part, and sample installation system (see Fig. 2) includes steel
Top 47：Two grooves are arranged at top, for placing sealing ring 23, permeability test confining pressure water are avoided to flow out, and there was water at top middle part
Passage 46, for permeating water outflow, top lower part is fluted, for placing sealing ring 23, prevents infiltration water from being flowed along around rock sample
Go out, geotextiles 49, permeable steel plate 48 are put in rock sample both ends successively.Tiny permeable hole is uniformly arranged above permeable steel plate, permeates hydraulic pressure
It is evenly distributed to rock sample end face.50 represent rock sample in Fig. 2, are wrapped up outside rock sample by heat-shrink tube 51, rock sample and confining pressure water are separated,
It is acted on simultaneously with upper and lower two sealing ring, plays sealing effect.Power transmission column system 6, upper end is fluted to place sealing ring 23, permeability test
When confining pressure water is avoided to enter infiltration water, have annular tank at the top of force-transmitting pole, ensure infiltration in entire rock sample end face.Power transmission column system
Here is moving cart, can carry the movement of pressure chamber body, and when carrying out experiment dress sample, trolley is released, will be pressed by lifting system
Power cylinder lifts installation sample, and then pressure chamber body is advanced in load frame by trolley, prepares experiment.It will by jack 9
Pressure chamber body and one top lifting of trolley are to appropriate location.Meanwhile jack applies axis pressure by power transmission column system to rock sample.
Between pressure chamber body top and load-bearing frame column, axis pressure sensor 2 is installed, axial load suffered by rock sample is accurate
Really reflect.It,, can be real when carrying out plus unloading equipped with axial displacement grating 7 between pressure chamber body and the left column of load-bearing frame
Existing Bit andits control, also provides axial displacement for failure test.
Body becomes test system and is made of body change digital display meter 10, body change measuring instrument 12 and body change tester 13.Body becomes tester
Cylinder bucket including mangneto linear displacement telescoping sensor 11, with infiltration inlet valve 15 and flowing water Valve 16.Sensor
Including electronics storehouse 11, steel measuring staff 35, disconnected magnetic rings 14, measuring staff contains waveguide filament.Its precision is high, repeats, without again
Zero is set.Electronic circuit generates initial pulse in electronics storehouse during working sensor, along magnetostriction line (waveguide filament) with constant speed
Transmission, while the rotating excitation field advanced along waveguide filament with pulse is generated, when permanent-magnetic field meets in the magnetic field and magnet ring, two magnetic
Magnetostrictive effect occurs for field superposition, twists waveguide filament, is installed in signal processing mechanism in electronics storehouse and perceives and be converted into
Corresponding terminate pulse by calculating the time difference between initial pulse and corresponding terminate pulse, accurately measures the position.The system can
Different range cylinder buckets, such as 100ml, 250ml, 1000ml, 2000ml, 20000ml are set.In advance by cylinder before experiment
Cross-sectional area inputs computer system, and water outlet is permeated during experiment and enters cylinder bucket by valve 15, and displacement changes, and becomes
Change amount permeates rise waterborne, is multiplied by the area for pre-entering computer system, must penetrate liquid volume.
Grease converting system and dynamical system include three sealing steel tanks and hydraulic cylinder 31, motor and high-pressure column
Plug pump 32, wherein the steel tank of three sealings is respectively to permeate water accumulator 21, confining pressure water accumulator 26, accumulator 29.It oozes
Permeable accumulator includes 100L water storage capsules 17, infiltration water entrance 45 and hydraulic oil inlet and outlet 42.Confining pressure water accumulator includes
25L water storage capsules 34, confining pressure water entrance 44 and hydraulic oil inlet and outlet 43.Accumulator includes prepackage 5MPa nitrogen-sealeds capsule 30
With seal capsule gas injection valve 27, hydraulic oil is filled between capsule and tank body in each accumulator.By oil sources during on-test
Two root pointers are arranged to a section on pressure gauge, including relatively low pressure pointer and high pressure pointer.Current pressure pointer is less than phase
When being less than set minimum pressure to low pressure pointer, that is, pressure, then motor drives high-pressure plunger pump pressurization, set until reaching
Determine at maximum pressure i.e. relatively high pressure pointer, motor stops.Applied oil pressure ensures that hydraulic oil will not return by check valve 33
Stream, for the sake of assurance, two check valves of having connected.Hydraulic oil pressure is into accumulator, there is dress 5MPa nitrogen glue in advance in accumulator
Capsule, capsule is compressed during pressurization, and total oil pressure can reduce when testing pressure supply, and capsule makes pressure slowly decline, and avoids electric motor starting mistake
In frequent.Hydraulic pressure passes through oil pressure and air pressure co- controlling in accumulator.When pressure is less than predetermined value, control system sends finger
Order makes accumulator supply oil pressure；When pressure is higher than predetermined value, fluid enters hydraulic cylinder by oil returning tube 38.
Computer control system mainly includes industrial personal computer, display, keyboard and mouse etc..Controlling test is carried out by program
With data acquisition.Measuring instrument gathered data is become by axial displacement grating, axial compressive force sensor and body, is carried out by computer system
Storage and processing, can be to a variety of data real-time displays and preservations such as confining pressure, osmotic pressure, xial feed, axial compressive force, body changes.It is right
Confining pressure loaded by constant speed, is unloaded and is controlled with holding, and stress or Bit andits control may be selected in axial direction, be respectively that constant speed adds
It carries, unloading and holding, osmotic pressure are kept.Computer system control is flexible, can be set according to different tests purpose into line program.
The main measuring technology of this test system and method are as follows：
Sample mounting technique and method：It whether damaged first looks into sealing ring, removes force-transmitting pole card slot sundries, dry close in rear enclosure
Seal；Permeable steel plate is contacted with sample both ends of the surface, pads geotextiles therebetween, and detrital material is into pipeline after preventing sample destruction, with heat
Heat-Shrinkable Tubings make confining pressure liquid be separated with sample.Moving cart is positioned, opens two valves of lifting system by switch board, opens control
Cabinet axis processed pressure manual pressure valve simultaneously presses switch board axis compressing cylinder ejection button, and pressure chamber body slowly declines, when will with pedestal
During contact, valve is turned down reduction decrease speed.When the decline of pressure chamber body makes bottom outside mimeograph be covered completely by nut, room
It docks successfully body bottom.
Jack up pressure cylinder technology and method：Two valves by first closing control cabinet, and another two valve is opened, then press
Lower switch board axis compressing cylinder ejects button, opens axis pressure manual pressure valve.When force-transmitting pole and top pressure sensor will connect
It when touching, turns pressurization changeover valve down, moving cart is made slowly to increase, until when axial loading data acquisition table shows 10-20KN, close
Axis compressing cylinder ejection button is closed, closing axle pressure manual pressure valve resets axial displacement.
Confining pressure bladder water injection technology and method：Confining pressure Draw off valve 5 is first closed, opens pressure cylinder upper discharge hole
37, confirm that switch board confining pressure output button is in closed state, then open balancing gate pit's Water injection tap, open running water valve 24,
Confining pressure chamber body is carried out by confining pressure filling pipe 39 and is filled to osculum water outlet, shows that balancing gate pit has filled, closes osculum.It beats
Switch board confining pressure Manual pressure relief valve 22 is opened, oil pressure in tank body is laid down, notes water into confining pressure accumulator convenient for passing through running water pressure
Capsule.Then, grease converting system confining pressure output valve 20 is opened, waits about half an hour.
Permeate bladder water injection technology and method：In the water filling of confining pressure bladder simultaneously, infiltration accumulator is carried out
Capsule water filling.Infiltration grease conversion Water filling valve 19 is opened, with about 1 hour of running water pressure water filling, then Water filling valve closing.
Preparation techniques and method before loading：Close balancing gate pit's Water filling valve and switch board confining pressure manual pressure valve.It will row
Water hole is opened, and confining pressure is made to be reduced to 0.Then, switch board change-over switch is placed at 3, computerized control pressuring method, opens control
Cabinet confining pressure output processed and axis compressing cylinder eject button.
High-ground stress and the controlling test under the conditions of hyperosmosis and measuring technology and method：Open computer control journey
Sequence, off-duty loading procedure.Console emergency stop push button is opened, motor is powered, displacement sensor is reset.Then,
Program loading command is set, confining pressure is arranged to constant speed loading, is needed to carry out loading setting according to testing program, axial control is set
It is set to displacement and keeps 0mm, osmotic pressure is set manually, confining pressure is arranged to hold mode when confining pressure is loaded into predetermined value, confining pressure is led to
Cross computer control.Then, infiltration grease conversion flowing water Valve 18 is opened, by permeating outlet conduit 41, passes through SERVO CONTROL
System loads osmotic pressure.If rock sample water seepage, water is permeated by pipeline 40, body is opened and becomes measuring instrument inlet valve
15, it measures, when penetrating water stabilization, until progress axial compressive force is loaded onto sample destruction overall process completion.
The present invention can carry out the experiment test under the conditions of up to 30MPa crustal stress and osmotic pressure, can control high with test
Crustal stress and the rock failure mechanism of rock experiment overall process under the conditions of hyperosmosis, carry out automatic data acquisition, can be obtained by data processing
High-ground stress and destruction the Complete Curve, failure mode and the destruction crack propagation law under the conditions of hyperosmosis, for example, can divide
Result as Figure 3-Figure 4 is not obtained.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (3)
1. a kind of high-ground stress and rock failure mechanism of rock pattern test system under hyperosmosis, which is characterized in that the high-ground stress and height
Rock failure mechanism of rock pattern test system includes hydraulic control system under the conditions of high-ground stress and hyperosmosis, balancing gate pit under osmotic pressure
Body and load-bearing frame system, body become test system, grease converting system and dynamical system, computer control system；
It is hydraulic control system positioned at load-bearing frame upper unit, middle part device is pressure chamber body, and lower device is hydraulic jack
Top；Hydraulic lifting system is responsible for adherence pressure chamber body during test specimen installation；Pressure chamber body includes the cavity of balancing gate pit, has infiltration to export
Balancing gate pit at the top of top force-transmitting pole, have infiltration import and confining pressure water entrance pressure pedestal and contain infiltration lane
Lower part force-transmitting pole；Pressurization place as test specimen includes：The confining pressure applied by balancing gate pit's cavity passes through biography by hydraulic jack
The axis pressure and the osmotic pressure provided by infiltration lane in force-transmitting pole that power column system is provided；Hydraulic jack provides axial pressure
Axis pressure by being placed in the moving cart on top, is passed to the pressure chamber body that is fixed in the above by power；Moving cart is responsible for transporting pressure
To facilitate, pressure chamber body is promoted chamber body and test specimen is installed；Hydraulic jack, confining pressure water inlet, infiltration import and grease are converted and moved
Force system is connected；
Osmotic pressure is exported to be connected with body change test system；Body become test system, axial compressive force sensor, hydraulic control system with
Computer control system is connected；
In grease converting system and dynamical system, there is fuel tank, the oil pump being connected with fuel tank, the oil pump of the system uses high pressure
Plunger pump, high-pressure plunger pump are connected with accumulator by check valve, and accumulator is supplied by hydraulic control system to hydraulic jack
Hydraulic oil, confining pressure water accumulator, infiltration accumulator are connected by hydraulic control system with accumulator, while confining pressure water energy storage
Device, infiltration accumulator are also connected with pressure chamber body confining pressure water inlet and osmotic pressure water inlet respectively.
2. high-ground stress as described in claim 1 and rock failure mechanism of rock pattern test system under hyperosmosis, which is characterized in that oil
Water converting system and dynamical system include three sealing steel tanks and hydraulic cylinder, motor and high-pressure plunger pump, and three close
The steel tank of envelope is respectively to permeate water accumulator, confining pressure water accumulator, accumulator；Permeating water accumulator includes 100L water storage glue
Capsule, infiltration water entrance and hydraulic oil inlet and outlet；Confining pressure water accumulator includes 25L water storage capsules, confining pressure water entrance and hydraulic pressure
Oil inlet and outlet；Accumulator includes prepackage 5MPa nitrogen-sealeds capsule and seal capsule gas injection valve, in each accumulator capsule with
Hydraulic oil is filled between tank body.
Wherein, system that employs high-pressure plunger pumps, which is characterized in that adds the grease converting system of high-pressure plunger pump and moves
Force system so that under the conditions of can carrying out up to 30MPa crustal stress and osmotic pressure using the experimenter of set test system
Experiment test can control and test high-ground stress and the rock failure mechanism of rock experiment overall process under the conditions of hyperosmosis.
3. high-ground stress as described in claim 1 and rock failure mechanism of rock pattern test system under hyperosmosis, which is characterized in that should
High-ground stress and the test method of rock failure mechanism of rock pattern test system under hyperosmosis are as follows：
It whether damaged first looks into sealing ring, removes force-transmitting pole card slot sundries, dry sealing ring in rear enclosure；Permeable steel plate and sample both ends
Face contacts, and pad geotextiles make confining pressure liquid be separated with sample, moving cart is positioned, open by switch board with heat-shrinkable T bush
Two valves of lifting system open switch board axis pressure manual pressure valve and press switch board axis compressing cylinder ejection button, balancing gate pit
Body slowly declines, and when that will be contacted with pedestal, turns valve down reduction decrease speed, when the decline of pressure chamber body makes bottom outside
When mimeograph is covered completely by nut, chamber body bottom is docked successfully；
Jack up pressure cylinder method：Two valves by first closing control cabinet, and another two valve is opened, then press switch board axis
Compressing cylinder ejects button, opens axis pressure manual pressure valve, when force-transmitting pole will be contacted with top pressure sensor, turns down and add
Changeover valve is pressed, moving cart is made slowly to increase, until when axial loading data acquisition table shows 10-20KN, closing axle compressing cylinder
Button is ejected, closing axle pressure manual pressure valve resets axial displacement；
Confining pressure bladder water-filling method：Confining pressure Draw off valve is first closed, opens pressure cylinder upper discharge hole, confirms switch board
Then confining pressure output button opens balancing gate pit's Water injection tap, opens running water valve, pass through confining pressure filling pipe in closed state
It carries out confining pressure chamber body and is filled to osculum water outlet, show that balancing gate pit has filled, close osculum, open switch board confining pressure and unload manually
Pressure valve lays down oil pressure in tank body, notes water into confining pressure bladder convenient for passing through running water pressure；Then, grease is opened to turn
System confining pressure output valve is changed, waits half an hours；
Permeate bladder water-filling method：In the water filling of confining pressure bladder simultaneously, infiltration bladder water filling can be carried out,
Infiltration grease conversion Water filling valve is opened, with 1 hour of running water pressure water filling, then Water filling valve closing；
Prepare before loading：Balancing gate pit's Water filling valve and switch board confining pressure manual pressure valve are closed, osculum is opened, makes confining pressure
Be reduced to 0, then, switch board change-over switch be placed at 3, computerized control pressuring method, open the output of switch board confining pressure and
Axis compressing cylinder ejects button.
Wherein, high-ground stress and rock failure mechanism of rock mode and the measuring technology of landslide evolution law under the conditions of hyperosmosis, feature
It is, uses the grease converting system and dynamical system for adding high-pressure plunger pump so that uses the experiment of set test system
Personnel can carry out the experiment test under the conditions of up to 30MPa crustal stress and osmotic pressure, can control and test high-ground stress and height
Rock failure mechanism of rock experiment overall process under the conditions of osmotic pressure.
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| CN111189756A (en) * | 2020-01-10 | 2020-05-22 | 中国矿业大学 | Broken rock mass-water-power coupling test system |
| RU2775462C1 (en) * | 2021-08-26 | 2022-07-01 | Федеральное государственное бюджетное учреждение науки Институт геофизики им. Ю.П. Булашевича Уральского отделения Российской академии наук (ИГФ УрО РАН) | Device for the study of porous rock samples |
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