CN110095346A - The experimental rig and test method of the rock failure mechanism of rock under high pore pressure and stress wave compound action - Google Patents
The experimental rig and test method of the rock failure mechanism of rock under high pore pressure and stress wave compound action Download PDFInfo
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- CN110095346A CN110095346A CN201910338311.1A CN201910338311A CN110095346A CN 110095346 A CN110095346 A CN 110095346A CN 201910338311 A CN201910338311 A CN 201910338311A CN 110095346 A CN110095346 A CN 110095346A
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- 239000011435 rock Substances 0.000 title claims abstract description 58
- 230000009471 action Effects 0.000 title claims abstract description 20
- 230000007246 mechanism Effects 0.000 title claims abstract description 20
- 239000011148 porous material Substances 0.000 title claims abstract description 18
- 150000001875 compounds Chemical class 0.000 title claims abstract description 16
- 238000010998 test method Methods 0.000 title claims abstract description 7
- 230000000694 effects Effects 0.000 claims abstract description 8
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 239000012466 permeate Substances 0.000 claims description 3
- 238000004880 explosion Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 3
- 239000000523 sample Substances 0.000 description 12
- 238000004458 analytical method Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 206010020718 hyperplasia Diseases 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000002591 computed tomography Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 231100000517 death Toxicity 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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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
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—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
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses the experimental rigs and test method of the rock failure mechanism of rock under a kind of high pore pressure and stress wave compound action, and the experimental rig is by style loading device, high pressure gas generating device and stress wave generating device composition.The sample loading device is made of pedestal, cylindrical body high-pressure chamber, brittleness closed film, air pressure dynamic pickup and shockwave sensor etc.；The high pressure gas generating device is made of high pressure seal, control valve and pressure gauge, and is connected by air inlet pipe with the air inlet that cylindrical body high-pressure chamber is reserved；The stress wave generating device is placed in the transmitting that rock sample bottom carries out stress wave.Experimental rig structure is simple, and rationally, assembly is easy for design；Thin slice is closed by setting brittleness, achievees the purpose that automatically open aspis, opens influence of the speed of aspis to rock rupture manually to eliminate；The stress wave action generated due to the activity such as earthquake, construction loads, explosion is considered simultaneously.
Description
Technical field
The present invention relates to Rock Mechanics Test field, rock under specially a kind of high pore pressure and stress wave compound action
The experimental rig and test method of destruction.
Background technique
In China deep underground energy and resources development and utilization field, mining depth is increasing.And in deep underground
In environment, high pressure gas is often contained in rock, in the stress wave action generated by the activity such as earthquake, construction loads, explosion,
It may result in the explosion of rock.As contained height in coal seam (coal belongs to one kind of rock, hereinafter collectively referred to as rock, is not repeating)
When pressing gas, it is possible to cause coal and gas prominent, the huge energy of disaster outburst can destroy equipment, cause economic damage
It loses, also results in the injures and deaths of personnel.
Although causing the mechanism of rock rupture to carry out a large amount of exploration and test high pressure gas both at home and abroad, due to
Influence factor is numerous, and genesis mechanism is complicated.Current research remains in qualitative analysis for correlation understanding and semidefinite quantifies
It is the stage of description, still unintelligible to the understanding of genesis mechanism and clear, it is a large amount of which results in be put into the underground engineering of deep
Human and material resources and financial resources be used to prevent and treat Related Disasters, constrain economic benefit.Therefore, probing into high pressure gas causes rock broken
Genesis mechanism is split for diaster prevention and control, improves production capacity and economic benefit has great importance.
Currently, method used is usually to be filled with high pressure gas into the closed container containing rock both at home and abroad, to rock
After adsorption equilibrium, the aspis of container is thrown open, the generation of correlation circumstance is simulated with this.But used in existing research
Simulator need to open manually, and the speed for opening aspis manually influences whether time and the energy variation of rock rupture
Rule；In addition, the influence of stress wave is not yet considered in existing research.
Summary of the invention
The present invention is directed to overcome the prior art, provide under a kind of high pore pressure and stress wave compound action to rock
The experimental rig and method that stone destroys, to probe into generation and the mechanism Evolution of correlated phenomena.
The present invention be through the following technical solutions to achieve the above objectives:
The experimental rig of the rock failure mechanism of rock under a kind of high pore pressure and stress wave compound action, including style loading device, high pressure
Gas generating unit and stress wave generating device；The sample loading device includes pedestal, and high-pressure chamber is installed above the pedestal,
Dismountable lid for having aspis is equipped with above the high-pressure chamber, the lid is sealed with brittleness closed film in aspis,
Air pressure dynamic pickup and shockwave sensor, the air pressure dynamic pickup and stress wave sensing are installed on the high-pressure chamber
Device is connected with data logger, and the data logger is connected with computer by data line；
The high pressure gas generating device includes high pressure sealing tank body, is provided with control valve and pressure above the high pressure sealing tank body
Power table, the high pressure gas device are connected by air inlet pipe with the air inlet that high-pressure chamber is reserved；
The stress wave generating device includes stress wave controller and stress wave launcher, the transmitter peace on stress wave controller
The transmitting of stress wave is carried out on high-pressure chamber.
The experimental rig of the rock failure mechanism of rock under a kind of above-mentioned high pore pressure and stress wave compound action, the high-pressure chamber with
Top lid is connected through a screw thread.
The test method of the experimental rig of the rock failure mechanism of rock under above-mentioned high pore pressure and stress wave compound action, including such as
Lower step:
(1) rock sample is put into high-pressure chamber；
(2) air pressure dynamic pickup is installed；
(3) brittleness closing thin slice is installed, and checks its airtightness；
(4) stress wave controller, transmitter and shockwave sensor are installed；
(5) gas is injected from air inlet pipe, so that high-pressure chamber reaches constant high-pressure state, and when continuing in high pressure conditions certain
Stress wave controller is opened after section, the stress wave triggering brittleness closed film of transmitting is opened, and pressure relief of gas, then, test specimen are being answered
It is destroyed under the collective effect of Reeb and pressure relief of gas, the air pressure dynamic pickup and shockwave sensor number during record test
According to.
Due to the low-permeability characteristic of the rock sample, rock sample must persistently permeate 10h in saturation high pressure gas
More than.
The test method of the experimental rig of the rock failure mechanism of rock, high-pressure chamber under above-mentioned high pore pressure and stress wave compound action
It is configured with the lid of different radii aspis, so that the opening of different radii achievees the purpose that control pressure relief of gas rate.
The beneficial effect of the present invention compared with the existing technology is:
Experimental rig structure is simple, and rationally, assembly is easy for design；Thin slice is closed by setting brittleness, reaches and automatically opens protrusion
The purpose of mouth opens influence of the speed of aspis to rock rupture to eliminate manually；It considers due to earthquake, apply simultaneously
The stress wave action that the activity such as work load, explosion generates.It is practical, convenient for promoting the use of.
Detailed description of the invention
Fig. 1 is that the experimental rig structure of the rock failure mechanism of rock under high pore pressure and stress wave compound action provided by the invention is shown
It is intended to.
In figure: 1- pedestal, 2- high-pressure chamber, 3- brittleness closed film, 4- lid, 5- air pressure dynamic pickup, 6- stress wave
Sensor, 7- high pressure sealing tank body, 8- control valve, 9- pressure gauge, 10- air inlet pipe, 11- data logger, 12- computer, 13-
Stress wave controller, 14- rock sample, 15- transmitter.
Specific embodiment
The following are the contents of the present invention, feature and effect is further illustrated, the present invention is made referring to drawings and examples detailed
It describes in detail bright.
The present invention provides a kind of tests of the rock failure mechanism of rock under high pore pressure and stress wave compound action as shown in Figure 1:
Device, comprising: style loading device, high pressure gas generating device and stress wave producer.
The sample loading device includes pedestal 1, and cylindrical body high-pressure chamber 2, the cylindrical body high pressure are installed above the pedestal
Dismountable lid 4 for having aspis is equipped with above storehouse, the lid 4 is connected through a screw thread with cylindrical body high-pressure chamber 2, described
Lid 4 is sealed with brittleness closed film 3 in aspis, and ceramics, brittleness closed film 3 can be selected in the material of brittleness closed film 3
For thin potsherd, leakproofness is realized by sealant.Air pressure dynamic is separately installed on the cylindrical body high-pressure chamber 2 to pass
Sensor 5 and shockwave sensor 6, the air pressure dynamic pickup 5 and shockwave sensor 6 are connected with data logger 11,
The data logger is connected with computer 12 by data line.
The high pressure gas generating device includes high pressure sealing tank body 7, is provided with control above the high pressure sealing tank body 7
Valve 8 and pressure gauge 9.The high pressure gas device is connected by air inlet pipe 10 with the air inlet that cylindrical body high-pressure chamber 2 is reserved.
Transmitter 15 on stress wave controller 13 is mounted on the transmitting that stress wave is carried out on high-pressure chamber 2.
Test method is realized by following steps:
(1) rock sample 14 is put into cylindrical body high-pressure chamber 2；
(2) air pressure dynamic pickup 5 is installed；
(3) brittleness closed film 3 is installed, and checks its airtightness；
(4) stress wave controller 13, transmitter 15 and shockwave sensor 6 are installed；
(5) gas is injected from air inlet pipe 10, so that cylindrical body high-pressure chamber 2 reaches constant high-pressure state, and is held in high pressure conditions
Stress wave producer 13 is opened after continuing certain period.The stress wave triggering brittleness closed film of transmitting is opened, pressure relief of gas.It is high
Pressure storehouse 2 is configured with the lid 4 of different radii aspis, so that the opening of different radii reaches the mesh of control pressure relief of gas rate
's.
Then, test specimen destroys under acting under the collective effect of stress wave and pressure relief of gas, the gas during record test
Press dynamic pickup 5 and 6 data of shockwave sensor.
Due to the low-permeability characteristic of the rock sample, rock sample must persistently permeate 10h in saturation high pressure gas
More than.
This experimental rig before the test, first with each test specimen of high-precision CT scan, determines the original hole of test specimen and crack
Distribution characteristics, and be depicted as three-dimensional fracture distributed model in a computer；Utilize electron-microscope scanning surface of test piece and boring surface
Hole and fractured zones draw surface pore and the fractured zones figure of each test specimen；During the test, the big of air pressure need to be recorded
Small and stress wave feature (such as wavelength, frequency, amplitude)；Using Acoustic radiating instrument measurement rock mass sample in shock wave process
The hyperplasia distribution characteristics in middle crack；After test, using CT and Electronic Speculum by the internal crack of the rock mass sample after shock wave and
External crack distribution characteristics is drawn in three-dimensional figure, and analysis crack increases and failure law and air pressure, stress wave characteristic and original
Interpore relationship is established the mechanics analysis model of rock mass under air pressure, stress wave coupling, is split under the conditions of analysis varying environment
The condition and mechanism that gap is generated, extends and destroyed, establish rock cranny hyperplasia under static load, pore pressure, stress wave coupling
With the Basic Criteria of destruction.
Compared with the existing technology, experimental rig structure is simple by the present invention, and rationally, assembly is easy for design；By the way that brittleness is arranged
Closed film achievees the purpose that automatically open aspis, to eliminate the speed of opening aspis manually to rock rupture
It influences；The stress wave action generated due to the activity such as earthquake, construction loads, explosion is considered simultaneously.It is practical, convenient for promoting
It uses.
It should be pointed out that for the those skilled in the art of the art, without departing from the principle of the present invention,
Several improvement and application can also be made, these are improved and application is also considered as protection scope of the present invention.
Claims (5)
1. the experimental rig of the rock failure mechanism of rock under a kind of high pore pressure and stress wave compound action, it is characterised in that: including style
Loading device, high pressure gas generating device and stress wave generating device；
The sample loading device includes pedestal (1), installs high-pressure chamber (2) above the pedestal, and being equipped with above the high-pressure chamber can
The lid (4) with aspis of disassembly, the lid (4) are sealed with brittleness closed film (3), the high-pressure chamber in aspis
(2) air pressure dynamic pickup (5) and shockwave sensor (6) are installed, the air pressure dynamic pickup (5) and stress wave pass on
Sensor (6) is connected with data logger (11), and the data logger (11) is connected with computer (12) by data line；
The high pressure gas generating device includes high pressure sealing tank body (7), is provided with control above the high pressure sealing tank body (7)
Valve (8) and pressure gauge (9), the high pressure gas device are connected by air inlet pipe (10) with the air inlet that high-pressure chamber (2) are reserved；
The stress wave generating device includes stress wave controller (13) and stress wave launcher, on stress wave controller (13)
Transmitter (15) is mounted on the transmitting that stress wave is carried out on high-pressure chamber (2).
2. the experimental rig of the rock failure mechanism of rock under a kind of high pore pressure according to claim 1 and stress wave compound action,
It is characterized by: the high-pressure chamber (2) is connected through a screw thread with top lid (4).
3. the experimental rig of the rock failure mechanism of rock under a kind of high pore pressure as claimed in claim 1 or 2 and stress wave compound action
Test method, characterized by the following steps:
(1) rock sample (14) is put into high-pressure chamber (2)；
(2) air pressure dynamic pickup (5) are installed；
(3) brittleness closing thin slice (3) is installed, and checks its airtightness；
(4) stress wave controller (13), transmitter (15) and shockwave sensor (6) are installed；
(5) gas is injected from air inlet pipe (10), so that high-pressure chamber (2) reaches constant high-pressure state, and continued in high pressure conditions
Stress wave producer (13) are opened after certain period, stress wave triggering brittleness closed film (3) of transmitting is opened, and gas unloads
Pressure, then, test specimen destroys under the collective effect of stress wave and pressure relief of gas.
4. the test of the experimental rig of the rock failure mechanism of rock under high pore pressure according to claim 3 and stress wave compound action
Method, it is characterised in that: due to the low-permeability characteristic of the rock sample, rock sample must continue in saturation high pressure gas
Permeate 10h or more.
5. the test of the experimental rig of the rock failure mechanism of rock under high pore pressure according to claim 3 and stress wave compound action
Method, it is characterised in that high-pressure chamber (2) is configured with the lid (4) of different radii aspis, so that the opening of different radii reaches
Control the purpose of pressure relief of gas rate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910338311.1A CN110095346B (en) | 2019-04-25 | 2019-04-25 | Rock damage test device and test method under high pore pressure and stress wave composite action |
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|---|---|---|---|
| CN201910338311.1A CN110095346B (en) | 2019-04-25 | 2019-04-25 | Rock damage test device and test method under high pore pressure and stress wave composite action |
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| Publication Number | Publication Date |
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| CN110095346A true CN110095346A (en) | 2019-08-06 |
| CN110095346B CN110095346B (en) | 2024-02-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175141A (en) * | 2020-02-07 | 2020-05-19 | 河海大学 | Method for selecting and matching particle cushion layer with reasonable particle size and free of damage to geomembrane |
| CN113720689A (en) * | 2021-08-17 | 2021-11-30 | 重庆大学 | Method for determining the maximum stress of a circular membrane in contact with a rigid plate under gas pressure |
| CN114166643A (en) * | 2021-12-08 | 2022-03-11 | 中国科学院武汉岩土力学研究所 | High-pressure unloading fracturing test system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175141A (en) * | 2020-02-07 | 2020-05-19 | 河海大学 | Method for selecting and matching particle cushion layer with reasonable particle size and free of damage to geomembrane |
| CN111175141B (en) * | 2020-02-07 | 2021-02-09 | 河海大学 | Method for selecting and matching particle cushion layer with reasonable particle size and free of damage to geomembrane |
| CN113720689A (en) * | 2021-08-17 | 2021-11-30 | 重庆大学 | Method for determining the maximum stress of a circular membrane in contact with a rigid plate under gas pressure |
| CN114166643A (en) * | 2021-12-08 | 2022-03-11 | 中国科学院武汉岩土力学研究所 | High-pressure unloading fracturing test system |
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