CN204649538U - Rock three axle acoustic emission experiment device under a kind of confined pressure, hole press strip part - Google Patents

Rock three axle acoustic emission experiment device under a kind of confined pressure, hole press strip part Download PDF

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Publication number
CN204649538U
CN204649538U CN201520202593.XU CN201520202593U CN204649538U CN 204649538 U CN204649538 U CN 204649538U CN 201520202593 U CN201520202593 U CN 201520202593U CN 204649538 U CN204649538 U CN 204649538U
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CN
China
Prior art keywords
confined pressure
cylinder barrel
acoustic emission
axial compression
rock
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CN201520202593.XU
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Chinese (zh)
Inventor
张帆
赵建建
郭翰群
唐永生
周辉
胡大伟
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湖北工业大学
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Priority to CN201520202593.XU priority Critical patent/CN204649538U/en
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Publication of CN204649538U publication Critical patent/CN204649538U/en

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Abstract

The utility model discloses rock three axle acoustic emission experiment device under a kind of confined pressure, hole press strip part, comprise axially through confined pressure room cylinder barrel, cylinder barrel top, confined pressure room is disposed with axial through axial compression cylinder barrel and by the top cover of its top seal, is provided with the axial piston moved vertically in axial compression cylinder barrel; Confined pressure room inner wall of cylinder is provided with confined pressure room, confined pressure is provided with permeable backing plate, lower permeable backing plate in the middle part of indoor chamber from top to bottom successively, upper permeable backing plate, lower permeable backing plate and confined pressure chamber interior walls surround a closed test cabinet for placing rock sample, be provided with pressure head between going up bottom permeable backing plate and axial piston, outside confined pressure chamber interior walls, be arranged with multilayer acoustic emission monitor(ing) device from upper; Sealed by bottom bottom axial compression cylinder barrel.The utility model effectively can monitor the situation of crack initiation, expansion, can be good at combining actual engineering geological condition, the laboratory environment that simulation is best.

Description

Rock three axle acoustic emission experiment device under a kind of confined pressure, hole press strip part

Technical field

The utility model relate to a kind ofly be applicable to confined pressure in the experiment utilizing acoustic emission device Real-Time Monitoring, location rock fracture, rock three axle acoustic emission experiment device under the press strip part of hole.

Background technology

Rock is as a kind of special engineering medium, and in the rock engineering of complexity, experience complicated ambient stress, when load reaches certain degree, rock interior there will be some small cracks.Often these small cracks affect the reliability of engineering to a great extent.

In order to determine the load-bearing capacity of these rocks in Practical Project, the research for the triaxial tests of rock also has a variety of, and what mainly adopt is utilize servocontrol stiff experiment machine to provide axle pressure, utilizes oil pressure to provide confined pressure.In order to better simulate actual working environment, being usually used to provide pore pressure to the inner fluid injection body of sample, being carried out the capacity value of controlled loading by industrial computer.This laboratory experiment can set up the constitutive model of rock sample under triaxial stress effect, but is the blind area in experiment link for the location in crack.

Acoustic emission comes from the 1950's Kaiser in the research work of Germany, has carried out large quantifier elimination subsequently and be progressively applied to multiple field in the industrial country such as the U.S., Japan.Rock is as a kind of material, and in rupture process, the strain energy of rent accumulation with the form abrupt release of elastic wave out, inspires acoustic emission information.By being arranged in the Acoustic radiating instrument of periphery, rupture location in rock sample can be determined by inversion algorithm, thus rock damage development process under effect of stress can be obtained.

The triaxial tests utilizing acoustic emission to detect rock in laboratory experiment seldom has scholar to set foot in, press symphyogenetic loading condition few especially in confined pressure, hole, the existence of these blind spots certainly will cause laboratory experiment to occur " tomography " with actual stress state.

Utility model content

The purpose of this utility model is exactly the deficiency that will solve above-mentioned background technology, and provide rock three axle acoustic emission experiment device under a kind of confined pressure, hole press strip part, it is that one is more comprehensive, the indoor experimental apparatus of more realistic engineering project.

The technical solution of the utility model is: rock three axle acoustic emission experiment device under a kind of confined pressure, hole press strip part, it is characterized in that: comprise axially through confined pressure room cylinder barrel, cylinder barrel top, described confined pressure room is fixedly installed axially through axial compression cylinder barrel, described axial compression cylinder barrel top, by top seal, is provided with the axial piston moved vertically in described axial compression cylinder barrel; Described confined pressure room inner wall of cylinder is provided with confined pressure room, described confined pressure is provided with permeable backing plate, lower permeable backing plate in the middle part of indoor chamber from top to bottom successively, described permeable backing plate, lower permeable backing plate and confined pressure chamber interior walls surround a closed test cabinet for placing rock sample, be provided with pressure head between bottom described permeable backing plate and described axial piston, outside described confined pressure chamber interior walls, be arranged with multilayer acoustic emission monitor(ing) device from upper; Sealed by bottom bottom described axial compression cylinder barrel.

In such scheme:

Described top cover and axial compression cylinder barrel are passed by many top screws from top to bottom successively, and the screw rod end of described top screws enters into described confined pressure room cylinder barrel, and described top cover, axial compression cylinder barrel and confined pressure room cylinder barrel are fixedly connected with by described top screws.

Be provided with axial compression pipeline in described top cover, one end of described axial compression pipeline is arranged on described top cover axially bottom, and the other end of described axial compression pipeline is connected with the axial compression pipe interface being arranged on described top cover radially outer side portions; The barrel bottom of described axial compression cylinder barrel is provided with axial compression exhausr port.

In the form of a ring, top, described confined pressure room is communicated with one end of confined pressure gas exhaust piping in described confined pressure room, and the other end of described confined pressure gas exhaust piping is connected with the confined pressure exhausr port of the barrel bottom being arranged on axial compression cylinder barrel; Be communicated with one end of confined pressure air inlet pipeline bottom described confined pressure room, the other end of described confined pressure air inlet pipeline is connected with the confined pressure air inlet pipeline interface being arranged on bottom sidepiece.

Described confined pressure indoor circle is wrapped in rubber sleeve, and the acting surface of described acoustic emission monitor(ing) device fixedly leans on described rubber sleeve.

The two ends up and down of described rubber sleeve are fixedly connected with confined pressure indoor circle with lower catch hoop respectively by front band.

Described acoustic emission monitor(ing) device divides the three layers of layout that evenly misplaces, and every layer of acoustic emission monitor(ing) device comprises two acoustic emission monitor(ing) devices be oppositely arranged; Described acoustic emission monitor(ing) device comprises fixing body, and the installed surface of described fixing body is be fitted in the arcwall face on the circle of described confined pressure indoor, is sealed between the installed surface of described fixing body and rubber sleeve by couplant; Described fixing body is provided with through hole vertically, in described through hole, acoustic emission probe is installed, the two ends up and down of described through hole are sealed by packed-piston, and the described packed-piston being positioned at top is provided with for the fairlead through the extension line be connected with described acoustic emission probe.

Also comprise the first osmotic pressure pipeline and the second osmotic pressure pipeline, described first osmotic pressure pipeline one end is communicated with described test cabinet through described permeable backing plate, the described first osmotic pressure pipeline other end be arranged on described axial compression cylinder barrel sidewall osmotic pressure tube outlet and be connected; Described second osmotic pressure pipeline one end is communicated with described test cabinet through described lower permeable backing plate, and the described second osmotic pressure pipeline other end is connected with the osmotic pressure pipe interface being arranged on described bottom sidewall.

Described bottom is passed by many root bottom parts screw rod, and the screw rod end of described bottom screw rod enters into described confined pressure room cylinder barrel, and described bottom and confined pressure room cylinder barrel are fixedly connected with by described bottom screw rod.

Under a kind of confined pressure of the present utility model, hole press strip part, rock three axle acoustic emission experiment device, effectively can monitor the situation of rock sample crack initiation, expansion, can be good at combining actual engineering geological condition, the laboratory environment that simulation is best.In addition, the utility model can also effectively protect acoustic emission monitor(ing) device, prevents its damage and fracture under high oil pressure, and (structure, making aspect) can not be caused to change on a large scale to original rock sample.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is A-A cross-sectional schematic in Fig. 1;

Fig. 3 is the vertical view of Fig. 1;

Fig. 4 is the structural representation of acoustic emission monitor(ing) device in the utility model;

Fig. 5 is the schematic top plan view of Fig. 4;

Fig. 6 is B-B cross-sectional schematic in Fig. 5.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

With reference to figure 1, Fig. 2 and Fig. 3, rock three axle acoustic emission experiment device under a kind of confined pressure of the present embodiment, hole press strip part, comprise axially through confined pressure room cylinder barrel 1, cylinder barrel 1 top, confined pressure room is fixedly installed axially through axial compression cylinder barrel 5, axial compression cylinder barrel 5 top is sealed by top cover 6, and sealed by bottom 2 bottom axial compression cylinder barrel 5, such top cover 6, axial compression cylinder barrel 5, confined pressure room cylinder barrel 1 and bottom 2 surround the lab space of a sealing.

The utility model is provided with the axial piston 4 moved vertically in axial compression cylinder barrel 5; Confined pressure room cylinder barrel 1 inwall is provided with confined pressure room 20, permeable backing plate 21, lower permeable backing plate 10 is provided with from top to bottom successively in the middle part of the inner chamber of confined pressure room 20, upper permeable backing plate 21, lower permeable backing plate 10 and confined pressure room 20 inwall surround a closed test cabinet for placing rock sample 8, be provided with pressure head 11 between going up bottom permeable backing plate 21 and axial piston 4, outside confined pressure chamber interior walls, be arranged with multilayer acoustic emission monitor(ing) device 22 from upper.

Top cover 6 and the axial compression cylinder barrel 5 of the present embodiment are passed by many top screws 7 from top to bottom successively, and the screw rod end of top screws 7 enters into confined pressure room cylinder barrel 1, top cover 6, axial compression cylinder barrel 5 and confined pressure room cylinder barrel 1 are fixedly connected with by top screws 7; Bottom 2 is then passed by many root bottom parts screw rod 3, and the screw rod end of bottom screw rod 3 enters into confined pressure room cylinder barrel 1, bottom 2 and confined pressure room cylinder barrel 1 is fixedly connected with by bottom screw rod 3.

This enforcement is provided with axial compression pipeline 23 in top cover 6, and one end of axial compression pipeline 23 is arranged on top cover 6 axially bottom, and the other end of axial compression pipeline 23 is connected with the axial compression pipe interface 13 being arranged on top cover 6 radially outer side portions; The barrel bottom of axial compression cylinder barrel 5 is provided with axial compression exhausr port 19.By inflation/deflation, axial compression pipe interface 13 and axial compression exhausr port 19 can regulate the axle pressure of rock test 8

In the form of a ring, top, confined pressure room 20 is communicated with one end of confined pressure gas exhaust piping 24 in the confined pressure room 20 of the present embodiment, and the other end of confined pressure gas exhaust piping 24 is connected with the confined pressure exhausr port 16 of the barrel bottom being arranged on axial compression cylinder barrel 5; Be communicated with one end of confined pressure air inlet pipeline 25 bottom confined pressure room 20, the other end of confined pressure air inlet pipeline 25 is connected with the confined pressure air inlet pipeline interface 12 being arranged on bottom 2 sidepiece.Confined pressure air inlet pipeline interface 12, confined pressure air inlet pipeline 25, confined pressure gas exhaust piping 24 and confined pressure exhausr port 16 form confined pressure access way, namely can regulate the confined pressure of rock test 8 pressure in confined pressure room 20.

Confined pressure room 20 inner circle of the present embodiment is wrapped in rubber sleeve 9, and the two ends up and down of rubber sleeve 9 are fixedly connected with confined pressure room 20 inner circle with lower catch hoop 17 respectively by front band 26, and the acting surface of acoustic emission monitor(ing) device 22 fixedly leans on rubber sleeve 9.

With reference to figure 4, Fig. 5 and Fig. 6, the acoustic emission monitor(ing) device of the present embodiment divides the three layers of layout that evenly misplaces, every layer of acoustic emission monitor(ing) device comprises two acoustic emission monitor(ing) devices 22 be oppositely arranged, acoustic emission monitor(ing) devices 22 all so is all in different planes, and be positioned at different height, can the germinating in comprehensive monitoring rock test 8 crack and expanding course, and can accurately locate position, rock test 8 crack accurately, be convenient to provide accurate solving condition to various algorithm; Acoustic emission monitor(ing) device 22 comprises fixing body 32, the installed surface 33 of fixing body 32 is for being fitted in the arcwall face in the inner circle of confined pressure room 20, sealed by couplant between the installed surface 33 of fixing body 32 and rubber sleeve 9, couplant can adopt water or butter, suitable couplant material can be chosen according to specimen types, to make the installed surface 33 of fixing body 32 fit completely with rubber sleeve 9, prevent the damage and fracture that the high oil pressure in confined pressure room 20 causes acoustic emission monitor(ing) device 22; Fixing body 32 is provided with through hole 29 vertically, acoustic emission probe 28 is installed in through hole 29, the two ends up and down of through hole 29 are sealed by packed-piston 30, can prevent the high oil pressure in confined pressure room 20 from entering into through hole to cause damage to acoustic emission probe 28, the packed-piston 30 being positioned at top is provided with fairlead 31, and the extension line that fairlead 31 is used to be connected with acoustic emission probe 28 passes.

The present embodiment also comprises the first osmotic pressure pipeline 15 and the second osmotic pressure pipeline 27, first osmotic pressure pipeline 15 one end is communicated with test cabinet through upper permeable backing plate 21, first osmotic pressure pipeline 15 other end be arranged on axial compression cylinder barrel 5 sidewall osmotic pressure tube outlet 18 and be connected; Second osmotic pressure pipeline 27 one end is communicated with test cabinet through lower permeable backing plate 10, and second osmotic pressure pipeline 27 other end is connected with the osmotic pressure pipe interface 14 being arranged on bottom 2 sidewall.When testing rock sample 8, can offer a through hole vertically to rock sample 8, the two ends up and down of this through hole are communicated with the second osmotic pressure pipeline 27 with the first osmotic pressure pipeline 15 respectively.First osmotic pressure pipeline 15 and the second osmotic pressure pipeline 27 can to the hole pressure radiai adjustment of rock test 8.

The present embodiment is when carrying out triaxial tests to rock, first by pipeline by confined pressure air inlet pipeline interface 12, axial compression pipe interface 13 and osmotic pressure pipe interface 14 respectively with the confined pressure pump interface of closed loop servo volume pump, axial compression pump interface is connected with osmotic pump interface, closed loop servo volume pump starts to carry out test loading procedure subsequently, namely loading confined pressure makes pressure reach particular value, loading hole is pressed onto particular value, load certain axle pressure simultaneously, and open acoustic emission monitor(ing) device, acoustic emission monitor(ing) device can receive by the crack of rock test 8 in germinating, the elastic wave produced in expanding course, and then inverse goes out the particular location in crack, can record and observe the development situation over time in rock test 8 crack.

The utility model effectively can monitor the situation of crack initiation, expansion, can be good at combining actual engineering geological condition, the laboratory environment that simulation is best.

The above is only preferred embodiment of the present utility model, not does any pro forma restriction to structure of the present utility model.Every above embodiment is done according to technical spirit of the present utility model any simple modification, equivalent variations and modification, all still belong in the scope of the technical solution of the utility model.

Claims (9)

1. rock three axle acoustic emission experiment device under a confined pressure, hole press strip part, it is characterized in that: comprise axially through confined pressure room cylinder barrel (1), cylinder barrel (1) top, described confined pressure room is fixedly installed axially through axial compression cylinder barrel (5), described axial compression cylinder barrel (5) top is sealed by top cover (6), is provided with the axial piston (4) moved vertically in described axial compression cylinder barrel (5), described confined pressure room cylinder barrel (1) inwall is provided with confined pressure room (20), permeable backing plate (21) is provided with from top to bottom successively in the middle part of described confined pressure room (20) inner chamber, lower permeable backing plate (10), described permeable backing plate, lower permeable backing plate and confined pressure room (20) inwall surround a closed test cabinet for placing rock sample (8), pressure head (11) is provided with between described permeable backing plate (21) and described axial piston (4) bottom, multilayer acoustic emission monitor(ing) device (22) is arranged with from upper outside described confined pressure chamber interior walls, described axial compression cylinder barrel (5) bottom is sealed by bottom (2).
2. rock three axle acoustic emission experiment device under a kind of confined pressure according to claim 1, hole press strip part, it is characterized in that: described top cover (6) and axial compression cylinder barrel (5) are passed by many top screws (7) from top to bottom successively, the screw rod end of described top screws (7) enters into described confined pressure room cylinder barrel (1), and described top cover (6), axial compression cylinder barrel (5) and confined pressure room cylinder barrel (1) are fixedly connected with by described top screws (7).
3. rock three axle acoustic emission experiment device under a kind of confined pressure according to claim 1 and 2, hole press strip part, it is characterized in that: in described top cover (6), be provided with axial compression pipeline (23), one end of described axial compression pipeline (23) is arranged on described top cover (6) axially bottom, and the other end of described axial compression pipeline (23) is connected with the axial compression pipe interface (13) being arranged on described top cover (6) radially outer side portions; The barrel bottom of described axial compression cylinder barrel (5) is provided with axial compression exhausr port (19).
4. rock three axle acoustic emission experiment device under a kind of confined pressure according to claim 1, hole press strip part, it is characterized in that: described confined pressure room (20) in the form of a ring, described confined pressure room (20) top is communicated with one end of confined pressure gas exhaust piping (24), and the other end of described confined pressure gas exhaust piping (24) is connected with the confined pressure exhausr port (16) of the barrel bottom being arranged on axial compression cylinder barrel (5); Described confined pressure room (20) bottom is communicated with one end of confined pressure air inlet pipeline (25), and the other end of described confined pressure air inlet pipeline (25) is connected with the confined pressure air inlet pipeline interface (12) being arranged on bottom (2) sidepiece.
5. rock three axle acoustic emission experiment device under a kind of confined pressure according to claim 4, hole press strip part, it is characterized in that: described confined pressure room (20) inner circle is wrapped in rubber sleeve (9), and the acting surface of described acoustic emission monitor(ing) device (22) fixedly leans on described rubber sleeve (9).
6. rock three axle acoustic emission experiment device under a kind of confined pressure according to claim 5, hole press strip part, is characterized in that: the two ends up and down of described rubber sleeve (9) are fixedly connected with confined pressure room (20) inner circle with lower catch hoop (17) respectively by front band (26).
7. rock three axle acoustic emission experiment device under a kind of confined pressure according to claim 5, hole press strip part, it is characterized in that: described acoustic emission monitor(ing) device divides the three layers of layout that evenly misplaces, every layer of acoustic emission monitor(ing) device comprises two acoustic emission monitor(ing) devices (22) be oppositely arranged; Described acoustic emission monitor(ing) device (22) comprises fixing body (32), the installed surface (33) of described fixing body (32), for being fitted in the arcwall face in described confined pressure room (20) inner circle, is sealed by couplant between the installed surface (33) of described fixing body (32) and rubber sleeve (9); Described fixing body (32) is provided with through hole (29) vertically, acoustic emission probe (28) is installed in described through hole (29), the two ends up and down of described through hole (29) are by packed-piston (30) sealing, and the described packed-piston (30) being positioned at top is provided with for the fairlead (31) through the extension line be connected with described acoustic emission probe (28).
8. rock three axle acoustic emission experiment device under a kind of confined pressure according to claim 1, hole press strip part, it is characterized in that: also comprise the first osmotic pressure pipeline (15) and the second osmotic pressure pipeline (27), described first osmotic pressure pipeline (15) one end is communicated with described test cabinet through described permeable backing plate (21), described first osmotic pressure pipeline (15) other end be arranged on described axial compression cylinder barrel (5) sidewall osmotic pressure tube outlet (18) and be connected; Described second osmotic pressure pipeline (27) one end is communicated with described test cabinet through described lower permeable backing plate (10), and described second osmotic pressure pipeline (27) other end is connected with the osmotic pressure pipe interface (14) being arranged on described bottom (2) sidewall.
9. rock three axle acoustic emission experiment device under a kind of confined pressure according to claim 1, hole press strip part, it is characterized in that: described bottom (2) is passed by many root bottom parts screw rod (3), the screw rod end of described bottom screw rod (3) enters into described confined pressure room cylinder barrel (1), and described bottom (2) and confined pressure room cylinder barrel (1) are fixedly connected with by described bottom screw rod (3).
CN201520202593.XU 2015-04-03 2015-04-03 Rock three axle acoustic emission experiment device under a kind of confined pressure, hole press strip part CN204649538U (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104749025A (en) * 2015-04-16 2015-07-01 煤炭科学技术研究院有限公司 Macro-micro three-axis visual pressure chamber for coal and rock
CN105334265A (en) * 2015-10-22 2016-02-17 东北大学 Acoustic emission sensor used for high-pressure oil medium
CN108020469A (en) * 2017-11-30 2018-05-11 湖北工业大学 A kind of triaxial tests device and its experimental method based on fluid pressure fracturing method
CN108152145A (en) * 2017-11-29 2018-06-12 中国石油天然气股份有限公司 The experimental provision and method of fracture development during simulation hydrocarbon source rock high temperature pyrolysis
CN108240942A (en) * 2016-12-26 2018-07-03 中国科学院地质与地球物理研究所 A kind of rock fracture experimental system and experimental method
CN108318528A (en) * 2018-01-09 2018-07-24 中国石油天然气股份有限公司 The determination method and apparatus of the running parameter of electric pulse pressure break
CN108414359A (en) * 2018-01-15 2018-08-17 中国矿业大学 The mechanical property system and method for rock sample containing duct under the conditions of a kind of real time high temperature
CN108914202A (en) * 2018-08-10 2018-11-30 北京索提斯科技有限公司 A kind of HVPE equipment can be mass gallium nitride
CN109142536A (en) * 2018-10-17 2019-01-04 中南大学 High-precision rock interior damages real-time locating and detecting device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104749025A (en) * 2015-04-16 2015-07-01 煤炭科学技术研究院有限公司 Macro-micro three-axis visual pressure chamber for coal and rock
CN105334265A (en) * 2015-10-22 2016-02-17 东北大学 Acoustic emission sensor used for high-pressure oil medium
CN105334265B (en) * 2015-10-22 2017-12-29 东北大学 A kind of acoustic emission sensor being used in high pressure oil medium
CN108240942A (en) * 2016-12-26 2018-07-03 中国科学院地质与地球物理研究所 A kind of rock fracture experimental system and experimental method
CN108152145A (en) * 2017-11-29 2018-06-12 中国石油天然气股份有限公司 The experimental provision and method of fracture development during simulation hydrocarbon source rock high temperature pyrolysis
CN108020469A (en) * 2017-11-30 2018-05-11 湖北工业大学 A kind of triaxial tests device and its experimental method based on fluid pressure fracturing method
CN108318528A (en) * 2018-01-09 2018-07-24 中国石油天然气股份有限公司 The determination method and apparatus of the running parameter of electric pulse pressure break
CN108414359A (en) * 2018-01-15 2018-08-17 中国矿业大学 The mechanical property system and method for rock sample containing duct under the conditions of a kind of real time high temperature
CN108914202A (en) * 2018-08-10 2018-11-30 北京索提斯科技有限公司 A kind of HVPE equipment can be mass gallium nitride
CN109142536A (en) * 2018-10-17 2019-01-04 中南大学 High-precision rock interior damages real-time locating and detecting device

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Granted publication date: 20150916

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