CN109001046A - Test the pilot system and method for deep rock mass I type fracture toughness - Google Patents
Test the pilot system and method for deep rock mass I type fracture toughness Download PDFInfo
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- CN109001046A CN109001046A CN201810716717.4A CN201810716717A CN109001046A CN 109001046 A CN109001046 A CN 109001046A CN 201810716717 A CN201810716717 A CN 201810716717A CN 109001046 A CN109001046 A CN 109001046A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2873—Cutting or cleaving
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- 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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
- G01N2203/0046—Vacuum
-
- 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
- G01N2203/006—Crack, flaws, fracture or rupture
-
- 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
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
Abstract
A kind of pilot system for testing deep rock mass I type fracture toughness, including the semi-disc rock sample with intermediate joint-cutting, for applying the loading system of axial compressive force to the semi-disc rock sample, for applying the vacuum pressure room of high temperature confining pressure to semi-disc rock sample, for the vacuum pump of vacuum pressure room exhaust and for the inert gas system to vacuum pressure room injection inert gas, the semi-disc rock sample with intermediate joint-cutting is placed in vacuum pressure room, the loading system of axial compressive force, which is extend into vacuum pressure room, to be applied on the semi-disc rock sample with intermediate joint-cutting, there are two supporting pads for setting below semi-disc rock sample with intermediate joint-cutting, two supporting pads are separately positioned on the two sides of the joint-cutting of the semi-disc rock sample with intermediate joint-cutting, vacuum pressure room is connect with inert gas system, Vacuum pressure is provided with heating device in room.Compared with the existing technology, the present invention can simulate true reservoir environment, accurately measure rock fracture toughness, provide support for the development of deep energy project.
Description
Technical field
The present invention relates to rock fracture mechanics research field, in particular under a kind of test deep rock mass high temperature and high pressure environment
The pilot system of I type fracture toughness value.
Background technique
Fracture toughness is the important of evaluation rock mechanics (including rock fracture crack initiation, extension and rupture mechanism etc.)
Parameter.Therefore, it is most important that accurate rock fracture toughness value, the test measurement method of design invention science are obtained.
At this stage, domestic and international scientist proposes the test method of several rock fracture toughnesses, to rock fracture mechanics
Development has very big facilitation.Franklin(1988 it) has been put forward for the first time and has utilized v-shaped joint-cutting bending specimen (CB) and stub
Two kinds of test I type fracture toughness methods of test specimen (SR), and the standard for being recommended as International Rock mechanics and Engineering society (ISRM) is tried
Proved recipe method；Fowell(1995 it) proposes tough with Brazilian disc (CCNBD) the test specimen test rock I type fracture of intermediate v-shaped joint-cutting
Degree, and it is recommended as the standard test method of International Rock mechanics Yu Engineering society (ISRM)；The novelty that another ISRM suggests
Test method is semi-disc (SCB) test specimen proposed using Kuruppu(2015).
Although the I type rock fracture toughness test method that the above ISRM suggests, to solve surface rock mechanics engineering problem
It provides a great help.But as human engineering construction activity constantly develops to Earth, such as carbon dioxide geological
It seals up for safekeeping, the extensive volume fracturing of shale reservoir etc., requires to consider high temperature and high pressure environment locating for deep rock mass, and at this
Rock fracture mechanics feature under the influence of kind deep environment.Therefore, the rock mechanics experiment equipment simulating earth for the science of inventing is deep
Portion's environment, and this important parameter of rock fracture toughness is accurately measured, there is important reference price to rock mechanics indepth engineering
Value.
Summary of the invention
The purpose of the present invention is to provide it is a kind of test deep rock mass I type fracture toughness pilot system and test method,
Test material preparation, experimental program are excessively complicated to solve in the test of existing Rock Masses Fractures toughness, and experiment purpose is excessively single to ask
Topic.
To achieve the above object, the invention adopts the following technical scheme:
A kind of pilot system for testing deep rock mass I type fracture toughness, including the semi-disc rock sample with intermediate joint-cutting, use
In to the semi-disc rock sample apply axial compressive force loading system, for semi-disc rock sample apply high temperature confining pressure
Vacuum pressure room, for vacuum pressure room exhaust vacuum pump and for vacuum pressure room injection inert gas indifferent gas
System system, the semi-disc rock sample with intermediate joint-cutting are placed in vacuum pressure room, the loading system of axial compressive force
It extend into vacuum pressure room and is applied on the semi-disc rock sample with intermediate joint-cutting, the semi-disc rock with intermediate joint-cutting
There are two supporting pads, two supporting pads to be separately positioned on the semi-disc rock sample with intermediate joint-cutting for setting below stone test specimen
Joint-cutting two sides, vacuum pressure room connect with inert gas system, is provided with heating device in vacuum pressure room.
The pilot system of above-mentioned test deep rock mass I type fracture toughness, the supporting pad are roller bearing.
The pilot system of above-mentioned test deep rock mass I type fracture toughness, the semi-disc rock examination with intermediate joint-cutting
Part includes semi-disc rock, and the bottom middle position of semi-disc rock is provided with artificial joint-cutting, is cut in artificial joint-cutting following settings
Mouth displacement meter, for joint-cutting opening width during real-time measurement test.
The pilot system of above-mentioned test deep rock mass I type fracture toughness, the loading system of the axial compressive force include load
The bottom of disk, transmission rod is connect by loading disc with the semi-disc rock sample with intermediate joint-cutting, and the top of transmission rod is stretched out
It is connect outside vacuum pressure room with the loading beam in vacuum pressure ceiling portion, is provided with guide rod outside vacuum pressure room, the two of loading beam
By guide rod supports, the top of guide rod is provided with spring arrangement at end, and pressure loading device applies pressure to loading beam, and pressure is by adding
Carrier beam and transmission rod are transmitted on the semi-disc rock sample with intermediate joint-cutting.
The pilot system of above-mentioned test deep rock mass I type fracture toughness is provided with dynamometry biography on the pressure loading device
Sensor and displacement sensor, for applying axial load to semi-disc test specimen, and can be using two kinds of control modes of power and displacement.
The pilot system of above-mentioned test deep rock mass I type fracture toughness, the indoor heating device of vacuum pressure are disk
The resistive heater being wound in vacuum tightness pressure chamber interior walls, supporting pad bottom are provided with cushion block, cushion block and vacuum pressure room it
Between fixed by gasket, be provided with ring flange between the close pressure chamber of vacuum at the top of the bottom of transmission rod, ring flange is close with vacuum
It closes between pressure chamber and transmission rod and is sealed by sealing ring；The vacuum pressure room is provided with the gas being connected to inert gas system
Body injection port, vacuum pressure room are additionally provided with gas discharge end mouth, and gas discharge end mouth is connect with pumped vacuum systems, vacuum pressure
Power room is additionally provided with temperature sensor and pressure sensor.
The pilot system of above-mentioned test deep rock mass I type fracture toughness, the pumped vacuum systems include and vacuum pressure room
The turbo molecular pump of connection, turbo molecular pump are connect with rotary pump, and the inert gas system includes high pressure measurement injection
Pump, switch and inert gas source, wherein vacuum pressure room is successively connected with high pressure measurement syringe pump, switch and inert gas source by pipeline
It is logical, pressure gauge, thermometer and flowmeter are provided on pipeline.
The pilot system of above-mentioned test deep rock mass I type fracture toughness, the diameter of the semi-disc rock sample are 75mm,
The artificial long α of joint-cutting is 16mm, and the distance S for being of two supporting pads is 60mm.
A kind of test method of the pilot system based on above-mentioned test deep rock mass I type fracture toughness, comprising the following steps:
A: the production of the semi-disc rock sample with intermediate joint-cutting: core-drilling makes semi-disc rock sample, semi-disc rock
Stone test specimen diameter is greater than 10 times or 76mm of rock type materials particle size, and thickness is greater than or equal to 0.4 times of diameter, manually
The long α of joint-cutting,, span S between support round rod,；
B: during core-drilling, choose into bore orientation and make structural plane inclination angle be respectively 0 °, 15 °, 30 °, 45 °, 60 °,
75 °, 90 ° of rock sample；
C: when core-drilling, avoiding sample microscopic damage as far as possible, prevents from influencing fracture toughness measurement accuracy；
D: it during sampling, cutting and test, clearly indicates anisotropy test specimen stratification direction, test specimen label, incision site, cut
Stitch length and load lay-down position point；
E: intermediate joint-cutting semi-disc test specimen is placed on the pad sudden peal of thunder member of vacuum pressure room, and is arranged inert gas system, passed
Sensor checks sealing device and resistive heater；
F: by flangeseal pressure chamber, pressure room air is extracted out using turbo molecular pump and rotary pump, until vacuum；
G: by gas injection port, injection system is pumped using inert gas, injects inert gas to vacuum pressure room, and record pressure
Power, temperature, flow；
H: hot environment, and the temperature and pressure of real-time measurement vacuum pressure room are provided to vacuum pressure room using resistive heater
Until conceptual design value, achievees the purpose that simulate deep rock mass high temperature and high pressure environment；
I: maintaining vacuum pressure room temperature and pressure constant, come into effect the axially loaded of fracture toughness testing, loading direction and
Artificial joint-cutting will strictly be kept point-blank, Bit andits control load, rate 0.06mm/min；
J: design vacuum pressure room different temperature and pressure can simulate the rock mass environment of different depth, measure different structure face
Rock mass I type fracture toughness value under inclination angle.
Compared with the existing technology, the present invention can simulate true reservoir environment, accurately measure rock fracture toughness, be deep
Energy project development provides support.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the pilot system of present invention test deep rock mass I type fracture toughness；
Fig. 2 is the structural schematic diagram of vacuum pressure room of the present invention；
Fig. 3 is schematic diagram of the present invention with obliquity structure face vertical masonry joint semi-disc sample；
Fig. 4 is vertical masonry joint semi-disc test specimen geometry and loading device schematic diagram of the present invention
Fig. 5 is the C-C of Fig. 4 to cross-sectional view.
Specific embodiment
The present invention is described in further detail below through specific implementation examples and in conjunction with the accompanying drawings.
As shown in Figs. 1-5, a kind of pilot system for testing deep rock mass I type fracture toughness, including with intermediate joint-cutting
Semi-disc rock sample 20, is used for semi-disc the loading system for applying axial compressive force to the semi-disc rock sample
Rock sample applies the vacuum pressure room 1 of high temperature confining pressure, for the vacuum pump 10 of vacuum pressure room exhaust and for vacuum pressure
The inert gas system of inert gas is injected in power room, and the semi-disc rock sample with intermediate joint-cutting is placed on vacuum pressure
Interior, the loading system of axial compressive force, which is extend into vacuum pressure room, is applied to the semi-disc rock sample with intermediate joint-cutting
On, there are two supporting pad 16, the supporting pad is roller bearing for setting below the semi-disc rock sample with intermediate joint-cutting.Two
Supporting pad is separately positioned on the two sides of the joint-cutting of the semi-disc rock sample with intermediate joint-cutting, vacuum pressure room and inert gas
System connection, is provided with heating device in vacuum pressure room.
It includes semi-disc rock 20 that the present invention, which has the semi-disc rock sample of intermediate joint-cutting, in the bottom of semi-disc rock
Meta position, which installs, is equipped with artificial joint-cutting, and in artificial joint-cutting following settings notch displacement meter, displacement meter is connect with controller, for real-time
Joint-cutting opening width during measurement test.
The loading system of axial compressive force of the invention includes loading disc 25, and the bottom of transmission rod 19 passes through loading disc and has
The semi-disc rock sample of intermediate joint-cutting connects, and adding for outside vacuum pressure room and vacuum pressure ceiling portion is stretched out at the top of transmission rod
Carrier beam connection, is provided with guide rod 28, by guide rod supports, the top of guide rod is provided with bullet at the both ends of loading beam outside vacuum pressure room
Spring device 13, pressure loading device 2 apply pressure to loading beam, and pressure is transmitted to by loading beam and transmission rod and is cut with centre
On the semi-disc rock sample of seam, load cell and displacement sensor, pressure-loaded are provided on the pressure loading device
Load cell and displacement sensor on device are connect with controller, for applying axial load, and energy to semi-disc test specimen
Using two kinds of control modes of power and displacement.
The indoor heating device of vacuum pressure of the present invention is the resistive heater being coiled in vacuum tightness pressure chamber interior walls
17, resistive heater is connect with controller, and supporting pad bottom is provided with cushion block 26, passes through sealing between cushion block and vacuum pressure room
Pad 24 is fixed, is provided with ring flange 18, ring flange and vacuum pressure room and biography at the top of the bottom of transmission rod between vacuum pressure room
It is sealed between power bar by sealing ring；The vacuum pressure room is provided with the gas injection port being connected to inert gas system,
Vacuum pressure room is additionally provided with gas discharge end mouth, and gas discharge end mouth is connect with pumped vacuum systems, and vacuum pressure room is also set up
There are temperature sensor and pressure sensor, the indoor temperature sensor and pressure sensor of vacuum pressure connect with controller respectively
It connects.
Pumped vacuum systems of the present invention includes the turbo molecular pump 10 being connected to vacuum pressure room, and pulley high-vacuum pump passes through
Pipeline is connect with vacuum pressure room and rotary pump 11 respectively, the inert gas system include high pressure measurement syringe pump 6, switch and
Inert gas source, wherein vacuum pressure room is successively connected to high pressure measurement syringe pump 6, switch and inert gas source by pipeline, in pipe
Pressure gauge 4, thermometer 5 and flowmeter 7 are provided on road, wherein turbo molecular pump, rotary pump connection, high pressure measurement injection
Pump, switch, pressure gauge, thermometer and flowmeter are connect with controller.
When the present invention tests, selecting the diameter of semi-disc rock sample is 75mm, and the artificial long α of joint-cutting is 16mm, two branch
The distance S for being of stake pad is 60mm.
A kind of test method of the pilot system based on above-mentioned test deep rock mass I type fracture toughness, comprising the following steps:
A: the production of the semi-disc rock sample with intermediate joint-cutting: core-drilling makes semi-disc rock sample, semi-disc rock
Stone test specimen diameter is greater than 10 times or 76mm of rock type materials particle size, and thickness is greater than or equal to 0.4 times of diameter, manually
The long α of joint-cutting,, span S between support round rod,,
B: during core-drilling, choose into bore orientation and make structural plane inclination angle be respectively 0 °, 15 °, 30 °, 45 °, 60 °,
75 °, 90 ° of rock sample；
C: when core-drilling, avoiding sample microscopic damage as far as possible, prevents from influencing fracture toughness measurement accuracy；
D: it during sampling, cutting and test, clearly indicates anisotropy test specimen stratification direction, test specimen label, incision site, cut
Stitch length and load lay-down position point；
E: intermediate joint-cutting semi-disc test specimen is placed on the pad sudden peal of thunder member of vacuum pressure room, and is arranged inert gas system, passed
Sensor checks sealing device and resistive heater；
F: by flangeseal pressure chamber, pressure room air is extracted out using turbo molecular pump and rotary pump, until vacuum；
G: by gas injection port, injection system is pumped using inert gas, injects inert gas to vacuum pressure room, and record pressure
Power, temperature, flow；
H: hot environment, and the temperature and pressure of real-time measurement vacuum pressure room are provided to vacuum pressure room using resistive heater
Until conceptual design value, achievees the purpose that simulate deep rock mass high temperature and high pressure environment；
I: maintaining vacuum pressure room temperature and pressure constant, come into effect the axially loaded of fracture toughness testing, loading direction and
Artificial joint-cutting will strictly be kept point-blank, Bit andits control load, rate 0.06mm/min；
J: design vacuum pressure room different temperature and pressure can simulate the rock mass environment of different depth, measure different structure face
Rock mass I type fracture toughness value under inclination angle.
Vacuum pressure room 1 of the invention includes upper cover plate 12, axial load transfer device, external-connected port, sensor, sealing
Circle, resistive heater 17.Axial load transfer device includes transmission rod 19, load disk 25 and cushion block 16, is applied directly to test specimen
Add active force.External-connected port includes gas discharge end mouth 23, gas injection port 22, temperature detection port 14 and pressure detecting end
Mouth 15 is arranged each port line and is sealed before pressure chamber is closed.Sensor includes temperature sensor and pressure sensor, is used for
Real-time measurement pressure room temperature and pressure.Resistive heater 17 is used to provide hot environment to pressure chamber, and is passed by temperature
Sensor controls temperature change.
Pressure chamber's vacuum evacuation pump, including gas discharge end mouth 23, turbo molecular pump 10 and rotary pump 11, for injecting
Before inert gas, by the indoor evacuating air of pressure, pressure chamber is kept to be in vacuum state.
Inert gas pumps injection system, including pressure gauge 4, thermometer 5, flowmeter 7, high pressure measurement syringe pump 6,8 and of switch
Gas source 9 injects inert gas up to the pressure value of setting to vacuum pressure room, and record pressure, stream before testing load
The data such as amount, temperature.
Axial loading system, including loading beam 2, power switch 3, ring flange 18, transmission rod 19, spring 13, guide rod 23, rolling
Axis 16, dynamometry and displacement sensor apply axial load to test specimen, until test specimen pressure using two kinds of control modes of power or displacement
Split destruction, the data such as record peak value breaking load P and displacement.
Based on above-mentioned test deep rock mass I type fracture toughness value pilot system and test method the following steps are included:
A: core-drilling, diameter of the present invention,, artificial joint-cutting is long to be selected；Support round rod
Between span；
B: during core-drilling, choose into bore orientation and make structural plane inclination angle be respectively 0 °, 15 °, 30 °, 45 °, 60 °,
75 °, 90 ° of test specimen；
C: when core-drilling, avoiding sample microscopic damage as far as possible, prevents from influencing fracture toughness measurement accuracy；
D: it during sampling, cutting and test, clearly indicates anisotropy test specimen stratification direction, test specimen label, incision site, cut
Stitch length and load lay-down position point etc.；
E: intermediate joint-cutting semi-disc test specimen 20 being placed on the roller bearing 16 of vacuum pressure room 1, and arranges external-connected port, sensor,
Check sealing device and resistive heater 17；
F: by 24 sealed pressure room of ring flange 18 and sealing ring, pressure chamber is extracted out using turbo molecular pump 10 and rotary pump 11
1 air, until vacuum；
G: by gas injection port 21, injection system is pumped using inert gas, injects inert gas to vacuum pressure room 1, and remember
Record pressure, temperature, flow etc.；
H: providing hot environment to pressure chamber 1 using resistive heater 17, and the temperature of real-time measurement pressure chamber and pressure until
Conceptual design value achievees the purpose that simulate deep rock mass high temperature and high pressure environment；
I: maintaining pressure room temperature and pressure constant, come into effect the axially loaded of fracture toughness testing, loading direction and artificial
Joint-cutting will strictly be kept point-blank, Bit andits control load, rate 0.06mm/min；
J: the different temperature in design pressure room and pressure can simulate the rock mass environment of different depth, and measurement different structure face is inclined
Rock mass I type fracture toughness value under angle.
The test method of I type fracture toughness under this deep rock mass high temperature and high pressure environment, can and accurately measure rock fracture
This important parameter of toughness has important reference value to rock mechanics indepth engineering.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of pilot system for testing deep rock mass I type fracture toughness, which is characterized in that including the semicircle with intermediate joint-cutting
Disk rock sample, is used to try semi-disc rock the loading system for applying the semi-disc rock sample axial compressive force
Part applies the vacuum pressure room of high temperature confining pressure, for the vacuum pump of vacuum pressure room exhaust and for lazy to the injection of vacuum pressure room
Property gas inert gas system, the semi-disc rock sample with intermediate joint-cutting is placed in vacuum pressure room, axial
The loading system of pressure, which is extend into vacuum pressure room, to be applied on the semi-disc rock sample with intermediate joint-cutting, has centre
There are two supporting pads, two supporting pads to be separately positioned on intermediate joint-cutting for setting below the semi-disc rock sample of joint-cutting
The two sides of the joint-cutting of semi-disc rock sample, vacuum pressure room are connect with inert gas system, are provided in vacuum pressure room
Heating device.
2. the pilot system of test deep rock mass I type fracture toughness according to claim 1, it is characterised in that: the branch
Stake pad is roller bearing.
3. the pilot system of test deep rock mass I type fracture toughness according to claim 2, it is characterised in that: the tool
The semi-disc rock sample for having intermediate joint-cutting includes semi-disc rock, and the bottom middle position of semi-disc rock, which is provided with, manually cuts
Seam, in artificial joint-cutting following settings notch displacement meter, for joint-cutting opening width during real-time measurement test.
4. the pilot system of test deep rock mass I type fracture toughness according to claim 2, it is characterised in that: the axis
It include loading disc to the loading system of pressure, the bottom of transmission rod is tried by loading disc and the semi-disc rock with intermediate joint-cutting
Part connection, the top of transmission rod is stretched out outside vacuum pressure room to be connect with the loading beam in vacuum pressure ceiling portion, in vacuum pressure room
It is provided with guide rod outside, by guide rod supports, the top of guide rod is provided with spring arrangement at the both ends of loading beam, and pressure loading device is to adding
Carrier beam applies pressure, and pressure is transmitted on the semi-disc rock sample with intermediate joint-cutting by loading beam and transmission rod.
5. the pilot system of test deep rock mass I type fracture toughness according to claim 6, it is characterised in that: the pressure
It is provided with load cell and displacement sensor on force loading device, for applying axial load to semi-disc test specimen, and can adopt
Firmly with displacement two kinds of control modes.
6. the pilot system of test deep rock mass I type fracture toughness according to claim 1, it is characterised in that: described true
The indoor heating device of pneumatics power is the resistive heater being coiled in vacuum tightness pressure chamber interior walls, and supporting pad bottom is provided with
Cushion block is fixed between cushion block and vacuum pressure room by gasket, is arranged between the close pressure chamber of vacuum at the top of the bottom of transmission rod
There is ring flange, is sealed between ring flange and vacuum tightness pressure chamber and transmission rod by sealing ring；The vacuum pressure room setting
There is the gas injection port being connected to inert gas system, vacuum pressure room is additionally provided with gas discharge end mouth, gas discharge end
Mouth is connect with pumped vacuum systems, and vacuum pressure room is additionally provided with temperature sensor and pressure sensor.
7. the pilot system of test deep rock mass I type fracture toughness according to claim 6, it is characterised in that: the pumping
Vacuum system includes the turbo molecular pump being connected to vacuum pressure room, and turbo molecular pump is connect with rotary pump, the inertia
Gas system includes high pressure measurement syringe pump, switch and inert gas source, wherein vacuum pressure room successively with high pressure measurement syringe pump,
Switch is connected to inert gas source by pipeline, and pressure gauge, thermometer and flowmeter are provided on pipeline.
8. testing the pilot system of deep rock mass I type fracture toughness described in any one of -7 according to claim 1, feature exists
In: the diameter of the semi-disc rock sample is 75mm, and the artificial long α of joint-cutting is 16mm, and the distance S for being of two supporting pads is
60mm。
9. a kind of examination of the pilot system based on test deep rock mass I type fracture toughness of any of claims 1-8
Proved recipe method, it is characterised in that: the following steps are included:
A: the production of the semi-disc rock sample with intermediate joint-cutting: core-drilling makes semi-disc rock sample, semi-disc rock
Stone test specimen diameter is greater than 10 times or 76mm of rock type materials particle size, and thickness is greater than or equal to 0.4 times of diameter, manually
The long α of joint-cutting,, span S between support round rod,；
B: during core-drilling, choose into bore orientation and make structural plane inclination angle be respectively 0 °, 15 °, 30 °, 45 °, 60 °,
75 °, 90 ° of rock sample；
C: when core-drilling, avoiding sample microscopic damage as far as possible, prevents from influencing fracture toughness measurement accuracy；
D: it during sampling, cutting and test, clearly indicates anisotropy test specimen stratification direction, test specimen label, incision site, cut
Stitch length and load lay-down position point；
E: intermediate joint-cutting semi-disc test specimen is placed on the pad sudden peal of thunder member of vacuum pressure room, and is arranged inert gas system, passed
Sensor checks sealing device and resistive heater；
F: by flangeseal pressure chamber, pressure room air is extracted out using turbo molecular pump and rotary pump, until vacuum；
G: by gas injection port, injection system is pumped using inert gas, injects inert gas to vacuum pressure room, and record pressure
Power, temperature, flow；
H: hot environment, and the temperature and pressure of real-time measurement vacuum pressure room are provided to vacuum pressure room using resistive heater
Until conceptual design value, achievees the purpose that simulate deep rock mass high temperature and high pressure environment；
I: maintaining vacuum pressure room temperature and pressure constant, come into effect the axially loaded of fracture toughness testing, loading direction and
Artificial joint-cutting will strictly be kept point-blank, Bit andits control load, rate 0.06mm/min；
J: design vacuum pressure room different temperature and pressure can simulate the rock mass environment of different depth, measure different structure face
Rock mass I type fracture toughness value under inclination angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810716717.4A CN109001046A (en) | 2018-07-03 | 2018-07-03 | Test the pilot system and method for deep rock mass I type fracture toughness |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810716717.4A CN109001046A (en) | 2018-07-03 | 2018-07-03 | Test the pilot system and method for deep rock mass I type fracture toughness |
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| Publication Number | Publication Date |
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| CN109001046A true CN109001046A (en) | 2018-12-14 |
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| CN113188914A (en) * | 2021-04-28 | 2021-07-30 | 镇江康源新材料科技有限公司 | Toughness testing device and method for platelet storage bag |
| CN113358482A (en) * | 2021-06-21 | 2021-09-07 | 重庆交通大学 | Class rock material fracture toughness testing arrangement with test piece retrieves function |
| CN113358482B (en) * | 2021-06-21 | 2023-10-10 | 重庆交通大学 | Rock-like material fracture toughness testing device with test piece recovery function |
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