CN105806762A - True triaxial coal rock three-dimensional deformation and permeability holder - Google Patents

True triaxial coal rock three-dimensional deformation and permeability holder Download PDF

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Publication number
CN105806762A
CN105806762A CN201610134293.1A CN201610134293A CN105806762A CN 105806762 A CN105806762 A CN 105806762A CN 201610134293 A CN201610134293 A CN 201610134293A CN 105806762 A CN105806762 A CN 105806762A
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CN
China
Prior art keywords
briquetting
deformation
axis
chamber
permeability
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Application number
CN201610134293.1A
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Chinese (zh)
Inventor
祝捷
Original Assignee
中国矿业大学(北京)
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Application filed by 中国矿业大学(北京) filed Critical 中国矿业大学(北京)
Priority to CN201610134293.1A priority Critical patent/CN105806762A/en
Publication of CN105806762A publication Critical patent/CN105806762A/en

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/08Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/0806Details, e.g. sample holders, mounting samples for testing

Abstract

The invention discloses a true triaxial coal rock three-dimensional deformation and permeability holder and belongs to the field of a clamping device. The holder is designed for solving the problem that the present device has difficulty in truly reflecting the change rule of the oil gas permeability under stress state. The holder comprises a columnar body and air bags, wherein a chamber with two ends being opening is formed in the body; the chamber comprises a sample cavity and at least two air bag cavities; the sample cavity is used for storing a to-be-detected sample; the air bag cavities are used for storing air bags and are located on the periphery of the sample cavity; the sample cavity is communicated with any one of the air bag cavities; a first press block and a second press block are respectively arranged at the two ends of the to-be-detected sample; the first press block and the second press block both locally penetrate in the chamber of the body. The holder provided by the invention can apply stress actions along three directions to the to-be-detected sample, the experiment condition can meet the complex crustal stress environment of rock stratum and the change rule of the oil gas permeability under stress state can be truly reflected.

Description

True triaxial coal petrography Three-direction deformation and permeability clamper

Technical field

The present invention relates to clamping device field, particularly relate to a kind of true triaxial coal petrography Three-direction deformation and permeability clamper.

Background technology

Permeability refers to that fluid passes through the ability of rock mass, generally represents by permeability.The internal various discontinuity surfaces (such as crystal boundary, joint plane, microfissure etc.) existed of rock mass provide passage for fluid permeability, and the difference of rock mass internal pore structure, size, porosity communication degree, mineral hydrophilic etc. makes different rock mass have different Penetration Signatures.Adopting steady state method to measure Gas Permeability of Cores is set up pressure reduction with nitrogen at rock sample two ends, surveys import and export pressure and rate of discharge, is calculated, by the one-dimensional steady seepage of gas, the permeability obtaining rock core according to Darcy's law when gas flows in rock sample.Test shows that the deformation understanding sample when rock mass (especially coal sample) measures permeability is very important.

In view of most rock stratum are all in complicated stress field, crustal stress includes the not only separate but also principal stress that is mutually related (vertical stress, horizontal maximum principal stress and horizontal minimum principal stress) in three directions, it is therefore desirable to the coupled relation of rock mass permeability and crustal stress under research true triaxial stress effect.

Existing measurement apparatus and clamping device can be used for measuring the axial permeability of cylindrical samples, applying axial compression and confined pressure to rock mass sample, but the stress that this device is in the horizontal direction can not embody the impact on rock stratum gas permeability of maximum principal stress and minimum principal stress, it is difficult to the Changing Pattern of petro-gas permeation rate under reflection true stress state;It addition, existing apparatus can not the deformation of measuring samples.

Summary of the invention

It is an object of the invention to propose a kind of true triaxial coal petrography Three-direction deformation that can reflect petro-gas permeation rate Changing Pattern under true stress state and permeability clamper.

For reaching this purpose, the present invention by the following technical solutions:

A kind of true triaxial coal petrography Three-direction deformation and permeability clamper, described clamper includes body and the air bag of column, described body interior is formed with the chamber of both ends open, described chamber includes sample cavity for placing detected sample and is positioned at least two of described sample cavity surrounding for placing the airbag chamber of described air bag, and described sample cavity is connected with airbag chamber any one described;Be respectively arranged with the first briquetting and the second briquetting at the two ends of described detected sample, described first briquetting and the second briquetting are located in the chamber of described body all at least in part.

Particularly, the chamber cross section of described body interior is cross, and described sample cavity is centrally located, and four peripheral cavitys form described airbag chamber respectively.

Particularly, described clamper also includes gum cover, and described gum cover is arranged between described detected sample and air bag.

Further, being provided with ring pressure pipe between the described air bag that each two is adjacent, described ring pressure pipe is pressed on the outer wall of described gum cover.

Particularly, the X-axis of described body, Y-axis and three directions of Z axis are respectively arranged with device for testing deformation amount.

Further, the device for testing deformation amount respectively mounted foil gauge in X-axis and Y direction;Device for testing deformation amount in Z-direction is displacement transducer, and institute's displacement sensors is connected to described first briquetting and/or the second briquetting.

Particularly, described air bag is pressurizeed by servopump.

Particularly, the arranged outside at described first briquetting has the first axial compression set, and the arranged outside at described second briquetting has the second axial compression set;Described first axial compression set and the second axial compression set are all partially disposed in the chamber of described body.

Further, described first axial compression set and/or the second axial compression set are provided with Z axis pressurization passageway;Described Z axis pressurization passageway one end can be connected to Z axis servo pressurization pump, and the other end is connected on the outer wall of described first briquetting or the second briquetting, and described first briquetting or the second briquetting can move along Z-direction under the pressure that described Z axis pressurization passageway is transmitted.

Particularly, body is provided with X-axis servo pressurization pump link, Y-axis servo pressurization pump link and/or confined pressure servo pressurization pump link.

The sample cavity surrounding of true triaxial coal petrography Three-direction deformation of the present invention and permeability clamper is provided with air bag and briquetting, the stress effect in three directions can be applied to detected sample, make experiment condition meet the ground stress environment that rock stratum is complicated, be convenient for measuring sample from injecting the gas gas flow to three directions of Three-direction deformation and sample downstream of release gas overall process;Measuring the Three-direction deformation injecting gas to release gas overall process sample in real time, accurate evaluation sample deforms whether reach poised state under absorbing gas effect;The gas flow in energy three directions, disposable acquisition laboratory sample downstream, obtains sample anisotropy penetration signature;The Changing Pattern of petro-gas permeation rate under true stress state can be reflected.

Accompanying drawing explanation

Fig. 1 is the true triaxial coal petrography Three-direction deformation that provides of the preferred embodiment of the present invention and the sectional view of permeability clamper;

Fig. 2 is the sectional view of the body that the preferred embodiment of the present invention provides;

Fig. 3 be in Fig. 1 A-A to sectional view.

In figure:

1, body;2, air bag;3, detected sample;4, gum cover;5, the first briquetting;6, the second briquetting;7, displacement transducer;8, ring pressure pipe;9, the first axial compression set;10, the second axial compression set;11, sample cavity;12, airbag chamber;13, X-axis servo pressurization pump link;14, Y-axis servo pressurization pump link;15, confined pressure servo pressurization pump link;91, Z axis pressurization passageway.

Detailed description of the invention

Technical scheme is further illustrated below in conjunction with accompanying drawing and by detailed description of the invention.

Preferred embodiment:

The open a kind of true triaxial coal petrography Three-direction deformation of this preferred embodiment and permeability clamper.As shown in Figure 1 to Figure 3, this clamper includes body 1 and the air bag 2 of column, body 1 is internally formed the chamber of both ends open, chamber includes the sample cavity 11 for placing detected sample 3 and is positioned at least two of sample cavity 11 surrounding for placing the airbag chamber 12 of air bag 2, and sample cavity 11 is connected with any one airbag chamber 12;Be respectively arranged with the first briquetting 5 and the second briquetting 6 at the two ends of detected sample 3, the first briquetting 5 and the second briquetting 6 are located in the chamber of body 1 all at least in part.

Detected sample 3 can be pressed from least six face, front and back up and down by air bag 2 and briquetting, three axially really independent loading stresses can not only be realized to carry out rock true triaxial failure mechanism research, the research such as fracturing mechanism, seepage tests can also be carried out, ensure that experimental data is more true, accurate, detection and research suitable in various rock mass samples, the Changing Pattern of petro-gas permeation rate under true stress state can be reflected, can the deformation of measuring samples easily, device is small, purposes is many, function is many.

The concrete shape of body 1 inner cavity chamber is not limit, and can form sample cavity 11 and be positioned at the airbag chamber 12 of sample cavity 11 surrounding.Preferably, as in figure 2 it is shown, the chamber cross section within body 1 is cross, sample cavity 11 centrally located (in Fig. 2 dotted line area defined), four peripheral cavitys form airbag chamber 12 respectively.Expanding after air bag 2 inflation in airbag chamber 12, air bag 2 presses to the detected sample 3 in sample cavity 11, simulates the stress field situation of complexity exactly.

Body 1 is preferably the cylinder that metal material is made, and has through hole vertically and form sample cavity 11 and airbag chamber 12 in the middle of body 1.Multiple airbag chambers 12 are preferably symmetrical arranged about sample cavity 11.

Air bag 2 is preferably used rubber and makes, and its outward appearance is preferably in flat hexahedron shape.In the heart equipped with hydraulic joint in the first half of a flat-sided plane of air bag 2, it is used for connecting hydraulic power source, provides pressure for air bag 2 (hydraulic bladder).Air bag 2 contact surface of quality of rubber materials is soft, uses this air bag 2 to provide uniform pressure-loaded not only to can guarantee that sealing but also pressure can intersperse among the core surface of detected sample 3 equably for detected sample 3.

In order to be further ensured that the air-tightness of detected sample 3, clamper can also include gum cover 4, and gum cover 4 is arranged between detected sample 3 and air bag 2.Preferably, gum cover 4 can be the rubber tube of a square both ends open, and the axis direction of this rubber tube is the direction of seepage flow.

On the basis of said structure, being also provided with ring pressure pipe 8 between the air bag 2 that each two is adjacent, ring pressure pipe 8 is pressed on the outer wall of gum cover 4.The outer wall of ring pressure pipe 8 is drilled with aperture, for assisting the sealing at 4 four angles of gum cover place, solves square 3 four angles of detected sample place and seals bad problem.

When this true triaxial coal petrography Three-direction deformation and permeability clamper are applied in deflection test, it is possible to be respectively arranged with device for testing deformation amount on the X-axis of body 1, Y-axis and three directions of Z axis.Preferably, the device for testing deformation amount respectively mounted foil gauge in X-axis and Y direction;Device for testing deformation amount in Z-direction is the displacement transducer 7 of precision 0.001mm, and displacement transducer 7 is connected to the first briquetting 5 and/or the second briquetting 6, monitors the deformation quantity of Z-direction in real time.

When this true triaxial coal petrography Three-direction deformation and permeability clamper are applied in stress and flow rate test, X-axis, Y-axis, Z axis and confined pressure adopt servopump to pressurize, and can be controlled and monitor pressure and the flow in three directions in real time by sensor.Concrete, body 1 is provided with X-axis servo pressurization pump link 13, Y-axis servo pressurization pump link 14 and/or confined pressure servo pressurization pump link 15, air bag 2 is pressurizeed by servopump.

Above-mentioned two test can also carry out simultaneously, i.e. by the gas flow of the rate of discharge meter real-time monitored all directions in three directions, detected sample 3 downstream, simultaneously in real time monitoring experiment sample at the deflection of X-axis, Y-axis and Z-direction.

Additionally, after using this true triaxial coal petrography Three-direction deformation and permeability clamper, detected sample 3 can also be directly used in the micro-mechanical failure such as high-pressure mercury, SEM.

More stable in order to ensure clamper overall structure, it is possible to the arranged outside at the first briquetting 5 has the first axial compression set 9, it is possible to the arranged outside at the second briquetting 6 has the second axial compression set 10;First axial compression set 9 and the second axial compression set 10 are all partially disposed in the chamber of body 1.

On the basis of said structure, the first axial compression set 9 and/or the second axial compression set 10 can be provided with Z axis pressurization passageway 91;Z axis pressurization passageway 91 one end can be connected to Z axis servo pressurization pump, and the other end is connected on the outer wall of the first briquetting 5 or the second briquetting 6, and the first briquetting 5 or the second briquetting 6 can move along Z-direction under the pressure that Z axis pressurization passageway 91 is transmitted.

Note, above are only presently preferred embodiments of the present invention and the know-why used.It will be appreciated by those skilled in the art that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute without departing from protection scope of the present invention.Therefore, although the present invention being described in further detail by above example, but the present invention is not limited only to above example, when without departing from present inventive concept, other Equivalent embodiments more can also be included, and the scope of the present invention is determined by appended right.

Claims (10)

1. a true triaxial coal petrography Three-direction deformation and permeability clamper, it is characterized in that, described clamper includes body (1) and the air bag (2) of column, described body (1) is internally formed the chamber of both ends open, described chamber includes the sample cavity (11) for placing detected sample (3) and is positioned at least two of described sample cavity (11) surrounding and is used for placing the airbag chamber (12) of described air bag (2), and described sample cavity (11) is connected with airbag chamber any one described (12);Be respectively arranged with the first briquetting (5) and the second briquetting (6) at the two ends of described detected sample (3), described first briquetting (5) and the second briquetting (6) are located in the chamber of described body (1) all at least in part.
2. true triaxial coal petrography Three-direction deformation according to claim 1 and permeability clamper, it is characterized in that, the chamber cross section of described body (1) inside is cross, described sample cavity (11) is centrally located, and four peripheral cavitys form described airbag chamber (12) respectively.
3. true triaxial coal petrography Three-direction deformation according to claim 1 and permeability clamper, it is characterized in that, described clamper also includes gum cover (4), and described gum cover (4) is arranged between described detected sample (3) and air bag (2).
4. true triaxial coal petrography Three-direction deformation according to claim 3 and permeability clamper, it is characterized in that, being provided with ring pressure pipe (8) between the described air bag (2) that each two is adjacent, described ring pressure pipe (8) is pressed on the outer wall of described gum cover (4).
5. according to the arbitrary described true triaxial coal petrography Three-direction deformation of Claims 1-4 and permeability clamper, it is characterised in that be respectively arranged with device for testing deformation amount on the X-axis of described body (1), Y-axis and three directions of Z axis.
6. true triaxial coal petrography Three-direction deformation according to claim 5 and permeability clamper, it is characterised in that X-axis and the device for testing deformation amount in Y direction respectively mounted foil gauge;Device for testing deformation amount in Z-direction is displacement transducer (7), and institute's displacement sensors (7) is connected to described first briquetting (5) and/or the second briquetting (6).
7. according to the arbitrary described true triaxial coal petrography Three-direction deformation of Claims 1-4 and permeability clamper, it is characterised in that described air bag (2) is pressurizeed by servopump.
8. according to the arbitrary described true triaxial coal petrography Three-direction deformation of Claims 1-4 and permeability clamper, it is characterized in that, arranged outside described first briquetting (5) has the first axial compression set (9), and the arranged outside described second briquetting (6) has the second axial compression set (10);Described first axial compression set (9) and the second axial compression set (10) are all partially disposed in the chamber of described body (1).
9. true triaxial coal petrography Three-direction deformation according to claim 8 and permeability clamper, it is characterised in that be provided with Z axis pressurization passageway (91) on described first axial compression set (9) and/or the second axial compression set (10);Described Z axis pressurization passageway (91) one end can be connected to Z axis servo pressurization pump, the other end is connected on the outer wall of described first briquetting (5) or the second briquetting (6), and described first briquetting (5) or the second briquetting (6) can move along Z-direction under the pressure that described Z axis pressurization passageway (91) is transmitted.
10. according to the arbitrary described true triaxial coal petrography Three-direction deformation of Claims 1-4 and permeability clamper, it is characterized in that, body (1) is provided with X-axis servo pressurization pump link (13), Y-axis servo pressurization pump link (14) and/or confined pressure servo pressurization pump link (15).
CN201610134293.1A 2016-03-09 2016-03-09 True triaxial coal rock three-dimensional deformation and permeability holder CN105806762A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106383076A (en) * 2016-08-19 2017-02-08 青岛石大石仪科技有限责任公司 A high-temperature rock core clamping device and an experiment method thereof
CN108414727A (en) * 2018-01-31 2018-08-17 中国矿业大学 A kind of CO2Displacement simulation test method
CN108414418A (en) * 2018-01-31 2018-08-17 中国矿业大学 A kind of three-axis penetration rate test method
CN108414419A (en) * 2018-01-31 2018-08-17 中国矿业大学 A kind of test of three-axis penetration rate and CO2Displacement simulation experimental rig
CN108872043A (en) * 2018-07-06 2018-11-23 中国矿业大学(北京) The three axle clamp holders for three axis non-isothermal multiphase porous flow experimental system of deep soft rock

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101169356A (en) * 2007-11-15 2008-04-30 西安理工大学 Triaxial independent loading pressure chamber structure true triaxial apparatus
CN101261259A (en) * 2008-01-18 2008-09-10 清华大学 Pressurized type confined pressure three axis rheogeniometer for low modulus materials
CN101634621A (en) * 2009-08-12 2010-01-27 重庆大学 Fluid-solid-heat coupling triaxial servo percolation device for gas-contained coal
CN102353584A (en) * 2011-05-19 2012-02-15 山东中石大石仪科技有限公司 Cylindrical rock core true triaxial gripper
CN102809574A (en) * 2012-07-18 2012-12-05 山东科技大学 Device for testing coupling function of multi-physics field of core rock and use method of device
CN103226081A (en) * 2013-04-08 2013-07-31 西安理工大学 True triaxial apparatus of unsaturated soil
CN103245566A (en) * 2013-04-19 2013-08-14 西安理工大学 Plane strain triaxial apparatus of axial rolling spacing board
CN103353421A (en) * 2013-06-17 2013-10-16 河海大学 Lateral deformation measuring device of plane strain triaxial rheometer
CN103994716A (en) * 2014-05-30 2014-08-20 东北大学 Distributed rock deformation measuring method
CN105158078A (en) * 2015-09-25 2015-12-16 中国石油天然气集团公司 Triaxial core loading testing device

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101169356A (en) * 2007-11-15 2008-04-30 西安理工大学 Triaxial independent loading pressure chamber structure true triaxial apparatus
CN101261259A (en) * 2008-01-18 2008-09-10 清华大学 Pressurized type confined pressure three axis rheogeniometer for low modulus materials
CN101634621A (en) * 2009-08-12 2010-01-27 重庆大学 Fluid-solid-heat coupling triaxial servo percolation device for gas-contained coal
CN102353584A (en) * 2011-05-19 2012-02-15 山东中石大石仪科技有限公司 Cylindrical rock core true triaxial gripper
CN102809574A (en) * 2012-07-18 2012-12-05 山东科技大学 Device for testing coupling function of multi-physics field of core rock and use method of device
CN103226081A (en) * 2013-04-08 2013-07-31 西安理工大学 True triaxial apparatus of unsaturated soil
CN103245566A (en) * 2013-04-19 2013-08-14 西安理工大学 Plane strain triaxial apparatus of axial rolling spacing board
CN103353421A (en) * 2013-06-17 2013-10-16 河海大学 Lateral deformation measuring device of plane strain triaxial rheometer
CN103994716A (en) * 2014-05-30 2014-08-20 东北大学 Distributed rock deformation measuring method
CN105158078A (en) * 2015-09-25 2015-12-16 中国石油天然气集团公司 Triaxial core loading testing device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106383076A (en) * 2016-08-19 2017-02-08 青岛石大石仪科技有限责任公司 A high-temperature rock core clamping device and an experiment method thereof
CN108414727A (en) * 2018-01-31 2018-08-17 中国矿业大学 A kind of CO2Displacement simulation test method
CN108414418A (en) * 2018-01-31 2018-08-17 中国矿业大学 A kind of three-axis penetration rate test method
CN108414419A (en) * 2018-01-31 2018-08-17 中国矿业大学 A kind of test of three-axis penetration rate and CO2Displacement simulation experimental rig
CN108414418B (en) * 2018-01-31 2020-08-25 中国矿业大学 Triaxial permeability testing method
CN108872043A (en) * 2018-07-06 2018-11-23 中国矿业大学(北京) The three axle clamp holders for three axis non-isothermal multiphase porous flow experimental system of deep soft rock

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Application publication date: 20160727