CN108398342A - The acoustic emission test device and its operating method of a kind of rock mass in high confining pressure unloading - Google Patents
The acoustic emission test device and its operating method of a kind of rock mass in high confining pressure unloading Download PDFInfo
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- CN108398342A CN108398342A CN201810167062.XA CN201810167062A CN108398342A CN 108398342 A CN108398342 A CN 108398342A CN 201810167062 A CN201810167062 A CN 201810167062A CN 108398342 A CN108398342 A CN 108398342A
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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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/307—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated by a compressed or tensile-stressed spring; generated by pneumatic or hydraulic means
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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
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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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
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0658—Indicating or recording means; Sensing means using acoustic or ultrasonic detectors
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The acoustic emission test device and its operating method that the invention discloses a kind of rock mass in high confining pressure unloading, acoustic emission test device includes acoustic emission sensor, preamplifier, coaxial cable, protect shell, annulus B, rubber ring, tenon, annulus A, connecting rod, mortise, quarter butt, bolt, nut, buckle and protector for sensor, the present invention to test block while changing confining pressure by carrying out acoustic emission test, it can realize the research of the failure mode to rock mass after Impact Load in high confining pressure uninstall process, associated materials kinetic parameter is provided for scientific algorithm and engineer application.And, which solves in the experiment of high confining pressure circulation impact, the problem of sensor handling are inconvenient and easily damaged by confining pressure and impact load, effectively simulate the alternating action of blasting impact and confining pressure off-load, the more accurately actual working state of simulation rock material obtains more applicable rock material kinetic parameter.
Description
Technical field
The present invention relates to rock mechanics experiment and sound emission monitoring technology field, specifically a kind of rock mass is unloaded in high confining pressure
In acoustic emission test device and its operating method, be widely used in the rock mass after Impact Load in high confining pressure uninstall process
In failure mode, failure mechanism and damage evolution law indoor emission experiment.
Background technology
In recent years, with the demand of social development, the also buried depth of engineering rock mass is also continuously increased, and deep rock mass is in height
Under the environmental condition that country rock is answered.Under high-ground stress environment, the property of engineering rock mass is ductility by temperature, and is unloaded in excavation
Again from ductility to temperature during lotus, therefore the elastic energy being stored in inside rock mass is easy to cause in its country rock unloading process
Release suddenly, and then the brittle breaks phenomenons such as rock mass splitting, avalanche are generated, even result in safety of the generation to engineering of rock burst
Cause grave danger.
Currently, drilling and blasting method is the main form of construction work of Underground Engineering Excavation, and during deep rock mass engineering project blast working, work
Making face, nearby rock mass is often in frequent explosion energetic disturbance, and above-mentioned energetic disturbance can be reduced to typically impact lotus
It carries.On the one hand it is to reach efficient rock-breaking, induced fracture raising deep rock mass gas permeability using blasting impact load in engineering
Deng another aspect impact load can change the mechanical characteristic and structure feature of rock mass.In conclusion research Impact Load
Failure mechanism of the rock material in high confining pressure uninstall process has very important engineering significance afterwards.
Split hopkinson press bar is the most important experimental rig for studying material mechanical performance under high strain-rate, examination
It is to generate impulse wave by projectile impact to test principle, and impulse wave enters test block by incident bar, and a part is reflected back incident bar, one
Part enters transmission bar by test block, and the dynamic stress and strain of material is calculated by the strain-pulse that foil gauge on elastic rod records
Parameter.In current experimental study indoors, blasting impact load mainly is simulated with split hopkinson press bar, it is attached on it
Confining pressure device is added to apply high-ground stress effect, to realize the analog study of deep rock mass Blasting Excavation process.
Meanwhile acoustic emission testing technology is for Rock Mass Unloading failure mode, failure mechanism and damage evolution law aspect
The main means studied.Deformation and crack propagation of the rock material under stress, are the important mechanisms of structural failure,
And the generation and development of underbead crack are along with the generation of energy release and Elastic wave, i.e. acoustic emission phenomenon.Sound emission is examined
The principle of survey is, the material mechanical generated by stress wave vibration is converted to electric signal with detector, carried out after amplification processing and
Record.It can be with the generation and development of dynamic monitoring rock material underbead crack, its knot of overall merit with acoustic emission testing technology
Structure feature and failure mode.
It is the accurate and effective for ensuring test data when progress acoustic emission detection, needs acoustic emission sensor and test block to be measured
It is coupled and is fixed by couplant, however during high confining pressure split hopkinson press bar circulation impact is tested, sound emission
Sensor can be damaged under high pressure from surrounding rock and temporary impact load action, while test block to be measured is installed in confining pressure dress again
In setting, therefore, it is difficult to carry out the installation repeatedly of acoustic emission sensor and dismounting.In conclusion existing apparatus can not effectively be unfolded to follow
After ring Impact Load, research work of the rock mass in high confining pressure uninstall process in terms of failure mechanism.
Invention content
It is above-mentioned to solve the purpose of the present invention is to provide a kind of acoustic emission test device of rock mass in high confining pressure unloading
The problem of being proposed in background technology.
To achieve the above object, the present invention provides the following technical solutions：
A kind of acoustic emission test device of rock mass in high confining pressure unloading, including acoustic emission sensor, preamplifier, coaxial electrical
Cable, protection shell, annulus B, rubber ring, tenon, annulus A, connecting rod, mortise, quarter butt, bolt, nut, buckle and sensor are protected
Protection unit, it is characterised in that：The protection shell is divided into combinable two halves, and acoustic emission sensor is fixedly mounted on protection shell
Groove in and acoustic emission sensor expose detection faces；
Coaxial cable connection sound sends out sensor and preamplifier and by protecting the outlet hole of outer casing bottom to draw, preposition amplification
Device is fixedly mounted on the card slot of the inner wall of protector for sensor, and protector for sensor is the mounting structure of two halves split；
Two quarter butts are fixed the both ends of the confining pressure device of split hopkinson press bar are each, and each reserved one of the rod end of quarter butt can
It is inserted into the quarter butt preformed hole of bolt, there are two the annulus A settings and is evenly distributed with four mortises thereon, and the side of annulus A stretches out two
Root connecting rod, the connecting rod preformed hole of the reserved pluggable bolt of rod end of connecting rod, is connected connecting rod and quarter butt by bolt
It connects, and nut is installed on bolt, complete the installation of tumbler, there are two the annulus B settings, and the centre of annulus B is embedding
Enter rubber ring, is evenly distributed with four tenons on annulus B, shape, the size and location of tenon are corresponding with mortise；
Protector for sensor is fixedly mounted in the rubber ring, and tenon corresponds the mortise being inserted into mounted on annulus A
In, complete the assembling of telescopic device.
As a further solution of the present invention：The groove is arranged according to the geomery of acoustic emission sensor.
As further scheme of the invention：It is filled with rubber material in the outlet hole hole and plays sealing and protection work
With.
As further scheme of the invention：Connecting rod is in rotatable state when the nut is not tightened, and nut is twisted
Next connecting rod is in stationary state.
As further scheme of the invention：When the connecting rod is rotated upwardly in vertical direction, the center of circle of annulus A
On central axes in test block.
As further scheme of the invention：The protector for sensor, which is inserted into, to be mounted in rubber ring and exposes it
Test side.
As further scheme of the invention：The surfacing of the tenon is smooth, and mortise constrains the radial position of annulus B
It moves and rotation, tenon is slidably connected in mortise.
As further scheme of the invention：Further include two buckles being detachably connected with tenon, when sensor
The test side of protective device is put in confining pressure device when being detected to test block, and two buckle the tenon for being clamped in both sides respectively
On.
As further scheme of the invention：The buckle includes two symmetrical plastic parts, and the shape of buckle is
It is less than 180 ° of imperfect annular in central angle, the ring wall of buckle is filled with rubber material, and respectively there are extended segment in the both sides of buckle, prolong
Smooth hole and threaded hole there are one being opened up respectively in the middle part of section are stretched, screw is screwed in threaded hole, the tail portion of screw is convex equipped with a circle
Part being played, and knob is arranged in screw, closes up two buckles when fixed, tenon is enclosed in centre, and screw is initially passed through smooth hole,
It is then passed through threaded hole, rotary screw threadingly hole precession, projection portion is eventually stuck in outside smooth hole, tightening screw then inner wall rubber
Glue material is compacted with tenon, plays fixed function.
A kind of operating method of the acoustic emission test device of rock mass in high confining pressure unloading, includes the following steps：
S1：Test block is installed according to the code requirement of impact test, adjusts incident bar and transmission bar, applies axially and radially oil pressure
Impact test is carried out, acoustic emission test device is located at both sides at this time, does not interfere with being normally carried out for impact test；
S2：After impact test, when needing to carry out acoustic emission test, removal axis pressure pulls open incident bar with transmission bar outward；
S3：Loosen the nut on the quarter butt of confining pressure device both sides；
S4：It is rotatablely connected the direction that bar changes annulus A, annulus B, until the end face of protector for sensor face test block, is tightened
Nut is fixed；
S5：It is uniformly coated with couplant in the detection faces of acoustic emission sensor, telescopic device is adjusted, finally makes detection faces and test block two
It holds end face to be in close contact, in each optional tenon easy to operation in both sides, buckle two halves is partially encased in outside tenon and is pinched,
Screw is successively inserted into smooth hole and threaded hole, is screwed on slightly, adjusts and determines the position being buckled on tenon, it is solid to tighten screw
It lives calmly；
S6：Instrument is connected by the requirement of acoustic emission test, discharges the oil pressure in confining pressure cylinder body, sound emission survey is carried out to test block
Examination；
S7：After the completion of test, buckle, extracting sensor protective device are removed, and annulus B is pushed back to the position being bonded with annulus A
It sets, unclamps nut and connecting rod is rotated back into initial position；
S8：The position that the incident bar removed and transmission bar are pushed into be bonded with test block again, then apply axial and radial oil pressure, i.e.,
It can proceed with the impact test under the conditions of high confining pressure.
Compared with prior art, the beneficial effects of the invention are as follows：
1, the present invention can be realized by carrying out acoustic emission test to test block while changing confining pressure to after Impact Load
The research of failure mode of the rock mass in high confining pressure uninstall process provides associated materials dynamics for scientific algorithm and engineer application
Parameter；
2, which solves in the experiment of high confining pressure circulation impact, sensor handling are inconvenient and easily damaged by confining pressure and impact load
Bad problem effectively simulates the alternating action of blasting impact and confining pressure off-load, more accurately the practical work of simulation rock material
Make state, obtains more applicable rock material kinetic parameter.
Description of the drawings
Fig. 1 be a kind of rock mass high confining pressure unloading in acoustic emission test device in impact test when schematic diagram；
Fig. 2 protector for sensor, rotation dress in the acoustic emission test device during high confining pressure unloads for the rock mass described in Fig. 1
It sets, sectional view after telescopic device assembling；
Fig. 3 protector for sensor graphics in the acoustic emission test device during high confining pressure unloads for the rock mass described in Fig. 1；
The front view that Fig. 4 a are annulus A and connecting rod is connect with quarter butt in confining pressure device（Without screw bolt and nut）；
Fig. 4 b are sectional views of the annulus A along I-I sections；
The vertical view that Fig. 4 c are annulus A and connecting rod is connect with quarter butt in confining pressure device（Screw bolt and nut is filled）；
Fig. 5 a are the sectional view of annulus B and tenon；
Fig. 5 b are the vertical view of annulus B and tenon；
Fig. 6 is schematic diagram when carrying out acoustic emission test；
Fig. 7 a are the assembled graphics of buckle；
Fig. 7 b are the graphics buckled when screwing is tightened.
In figure：1- acoustic emission sensors, 2- preamplifiers, 3- coaxial cables, 4- protect shell, 5- outlet holes, 6- cards
Slot, 7- grooves, 8- annulus B, 9- rubber ring, 10- tenons, 11- annulus A, 12- connecting rod, 13- mortises, 14- quarter butts, 15- spiral shells
Bolt, 16- nuts, 17- buckles, 18- protector for sensor, 19- quarter butt preformed holes, 20- connecting rod preformed holes, 21- test blocks,
22- confining pressure cylinder bodies, 23- incident bars, 24- transmission bars.
Specific implementation mode
The technical solution of this patent is described in more detail With reference to embodiment.
Please refer to Fig.1-7b, a kind of acoustic emission test device of rock mass in high confining pressure unloading, a kind of rock mass is in high confining pressure
Acoustic emission test device in unloading, including acoustic emission sensor (1), preamplifier (2), coaxial cable (3), protection shell
(4), annulus B (8), rubber ring (9), tenon (10), annulus A (11), connecting rod (12), mortise (13), quarter butt (14), bolt
(15), nut (16), buckle (17) and protector for sensor (18), it is characterised in that：The protection shell (4) is divided into and can spell
The two halves of dress, acoustic emission sensor (1) is fixedly mounted in the groove (7) of protection shell and acoustic emission sensor (1) exposes inspection
Survey face；
Coaxial cable (3) connection sound sends out sensor (1) and preamplifier (2) and the outlet hole by protecting shell (4) bottom
(5) it draws, preamplifier (2) is fixedly mounted on the card slot (6) of the inner wall of protector for sensor (18), sensor protection
Device (18) is the mounting structure of two halves split；
Two quarter butts (14) are fixed the both ends of the confining pressure device of split hopkinson press bar are each, the rod end of quarter butt (14) is each pre-
The quarter butt preformed hole (19) of a pluggable bolt is stayed, there are two annulus A (11) settings and is evenly distributed with four mortises thereon
(13), two connecting rods (12), the connection of the reserved pluggable bolt of rod end of connecting rod (12) are stretched out in the side of annulus A (11)
Connecting rod (12) is connect with quarter butt (14) by bolt (15), and is equipped with nut on bolt (15) by bar preformed hole (20)
(16), the installation of tumbler is completed, there are two annulus B (8) settings, the intermediate embedded rubber ring (9) of annulus B (8), circle
Uniformly distributed four tenons (10), shape, the size and location of tenon (10) are corresponding with mortise (13) on ring B (8)；
Protector for sensor (18) is fixedly mounted in the rubber ring (9), and tenon (10) is corresponded to be inserted into and is mounted on
In the mortise (13) of annulus A (11), the assembling of telescopic device is completed.
The groove (7) is arranged according to the geomery of acoustic emission sensor (1).
It is filled with rubber material in outlet hole (5) hole and plays sealing and protective effect.
Connecting rod (12) is in rotatable state when the nut (16) is not tightened, and nut (16) tightens rear connecting rod (12)
In stationary state.
When the connecting rod (12) is rotated upwardly in vertical direction, the center of circle of annulus A (11) is in test block (21)
On axis.
The protector for sensor (18), which is inserted into, to be mounted in rubber ring (9) and exposes its test side.
The surfacing of the tenon (10) is smooth, and mortise (13) constrains the radial displacement and rotation of annulus B (8), tenon
(10) it is slidably connected in mortise (13).
Further include two buckles (17) being detachably connected with tenon (10), when protector for sensor (18 detection
End is put in confining pressure device when being detected to test block (21), and two buckles (17) are clamped in respectively on the tenon (10) of both sides.
The buckle (17) includes two symmetrical plastic parts, and the shape of buckle (17) is to be less than 180 ° in central angle
The ring wall of imperfect annular, buckle (17) is filled with rubber material, and respectively there are an extended segment in the both sides of buckle (17), part in extended segment
It does not open up there are one smooth hole and threaded hole, screw is screwed in threaded hole, the tail portion of screw is equipped with a circle projection portion, and spiral shell
Nail setting knob, closes up two buckles (17) when fixed, and tenon (10) is enclosed in centre, and screw is initially passed through smooth hole, then
Across threaded hole, rotary screw threadingly hole precession, projection portion is eventually stuck in outside smooth hole, tightening screw then inner wall rubber
Material is compacted with tenon (10), plays fixed function.
First, acoustic emission sensor (1) is put into the groove (7) of protection shell and is fixed, connected with coaxial cable (3)
Sensor (1) is drawn with preamplifier (2) and by outlet hole (5).Preamplifier (2) is fixed on protector for sensor
(18) on the card slot (6) set in, by the tenon structure pairing of two half-shells, fastening is fixed, and protector for sensor (18) is completed
Installation.Two quarter butts (14) are fixed the confining pressure device both ends of split hopkinson press bar are each, and each reserved one of rod end can be inserted
Enter the quarter butt preformed hole (19) of bolt, prepare two annulus A (11), thereon uniformly 4 small sircle holes as mortise (13), annulus A
(11) two connecting rods (12) are stretched out in side, and rod end also reserves the connecting rod preformed hole (20) of pluggable bolt；Pass through bolt
(15) connecting rod (12) is connect with quarter butt (14), and screws on nut (16), complete the installation of tumbler.Two circles are prepared again
Ring B (8), the embedded rubber ring (9) in centre, uniformly distributed four smooth tenons (10) on annulus B (8), shape, size and location with
Above-mentioned mortise (13) is corresponding.Protector for sensor (18) is fixed on to the rubber ring (9) of the annulus B (8) with tenon (10)
It is interior, tenon (10) is corresponded and is inserted into the mortise (13) of annulus A (11), the assembling of telescopic device is completed.
A kind of operating method of the acoustic emission test device of rock mass in high confining pressure unloading, includes the following steps：
S1：According to the code requirement installation test block (21) of impact test, incident bar (23) and transmission bar (24) are adjusted, applies axis
To with radial oil pressure carry out impact test, at this time acoustic emission test device be located at both sides, do not interfere with impact test it is normal into
Row；
S2：After impact test, when needing to carry out acoustic emission test, removal axis pressure, by incident bar (23) and transmission bar (24)
It pulls open outward；
S3：Loosen the nut (16) on the quarter butt (14) of confining pressure device both sides；
S4：It is rotatablely connected the direction that bar (12) changes annulus A (11), annulus B (8), until protector for sensor (18) face
It is fixed to tighten nut (16) for the end face of test block (21)；
S5：It is uniformly coated with couplant in the detection faces of acoustic emission sensor (1), telescopic device is adjusted, finally makes detection faces and examination
Block (21) both ends end face is in close contact, in each optional one of both sides tenon (10) easy to operation, by (17) two half part of buckle
Packet outside and is pinched in tenon (10), and screw is successively inserted into smooth hole and threaded hole, is screwed on slightly, is adjusted and determine buckle (17)
Position on tenon (10), tightens screw and fixes；
S6：Instrument, the oil pressure in release confining pressure cylinder body (22), to test block (21) carry out sound are connected by the requirement of acoustic emission test
Transmitting test；
S7：After the completion of test, buckle (17), extracting sensor protective device (18) are removed, and annulus B (8) is pushed back to and circle
The position of ring A (11) fittings unclamps nut (16) and connecting rod (12) is rotated back into initial position；
S8：The incident bar removed (23) and transmission bar (24) are pushed into the position being bonded with test block (21) again, then apply axial direction
With radial oil pressure, you can continue the impact test under the conditions of high confining pressure.
The present invention can be realized by carrying out acoustic emission test to test block while changing confining pressure to Impact Load
The research of failure mode of the rock mass in high confining pressure uninstall process afterwards provides associated materials power for scientific algorithm and engineer application
Learn parameter.Also, which solves in the experiment of high confining pressure circulation impact, sensor handling are inconvenient and easily by confining pressure and impact
The problem of load damages, effectively simulates the alternating action of blasting impact and confining pressure off-load, more accurately simulation rock material
Actual working state obtains more applicable rock material kinetic parameter.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " setting ", " phase
Even " and " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；
It can be directly connected, can also can be indirectly connected through an intermediary the connection inside two elements.For this field
Those of ordinary skill for, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (10)
1. a kind of acoustic emission test device of rock mass in high confining pressure unloading, including acoustic emission sensor (1), preamplifier
(2), coaxial cable (3), protection shell (4), annulus B (8), rubber ring (9), tenon (10), annulus A (11), connecting rod (12),
Mortise (13), quarter butt (14), bolt (15), nut (16), buckle (17) and protector for sensor (18), it is characterised in that：
The protection shell (4) is divided into combinable two halves, and acoustic emission sensor (1) is fixedly mounted in the groove (7) of protection shell
And acoustic emission sensor (1) exposes detection faces；
Coaxial cable (3) connection sound sends out sensor (1) and preamplifier (2) and the outlet hole by protecting shell (4) bottom
(5) it draws, preamplifier (2) is fixedly mounted on the card slot (6) of the inner wall of protector for sensor (18), sensor protection
Device (18) is the mounting structure of two halves split；
Two quarter butts (14) are fixed the both ends of the confining pressure device of split hopkinson press bar are each, the rod end of quarter butt (14) is each pre-
The quarter butt preformed hole (19) of a pluggable bolt is stayed, there are two annulus A (11) settings and is evenly distributed with four mortises thereon
(13), two connecting rods (12), the connection of the reserved pluggable bolt of rod end of connecting rod (12) are stretched out in the side of annulus A (11)
Connecting rod (12) is connect with quarter butt (14) by bolt (15), and is equipped with nut on bolt (15) by bar preformed hole (20)
(16), there are two annulus B (8) settings, the centre of annulus B (8) is embedded in rubber ring (9), and four tenons are evenly distributed on annulus B (8)
Head (10), shape, the size and location of tenon (10) are corresponding with mortise (13)；
Protector for sensor (18) is fixedly mounted in the rubber ring (9), and tenon (10) is corresponded to be inserted into and is mounted on
In the mortise (13) of annulus A (11).
2. acoustic emission test device of the rock mass according to claim 1 in high confining pressure unloading, which is characterized in that described recessed
Slot (7) is arranged according to the geomery of acoustic emission sensor (1).
3. rock mass according to claim 1 high confining pressure unloading in acoustic emission test device, which is characterized in that it is described go out
It is filled with rubber material in string holes (5) hole and plays sealing and protective effect.
4. acoustic emission test device of the rock mass according to claim 1 in high confining pressure unloading, which is characterized in that the spiral shell
Connecting rod (12) is in rotatable state when female (16) are not tightened, and it is in stationary state that nut (16), which tightens rear connecting rod (12),.
5. acoustic emission test device of the rock mass according to claim 1 in high confining pressure unloading, which is characterized in that the company
When extension bar (12) is rotated upwardly in vertical direction, the center of circle of annulus A (11) is on the central axes of test block (21).
6. acoustic emission test device of the rock mass according to claim 1 in high confining pressure unloading, which is characterized in that the biography
Sensor protective device (18), which is inserted into, to be mounted in rubber ring (9) and exposes its test side.
7. acoustic emission test device of the rock mass according to claim 1 in high confining pressure unloading, which is characterized in that the tenon
The surfacing of head (10) is smooth, and tenon (10) is slidably connected in mortise (13).
8. acoustic emission test device of the rock mass according to claim 1 in high confining pressure unloading, which is characterized in that further include
Two buckles (17) being detachably connected with tenon (10), two buckles (17) are clamped in respectively on the tenon (10) of both sides.
9. acoustic emission test device of the rock mass according to claim 8 in high confining pressure unloading, which is characterized in that the card
It includes two symmetrical plastic parts to detain (17), and the shape of buckle (17) is the imperfect annular for being less than 180 ° in central angle, card
The ring wall of button (17) is filled with rubber material, and respectively there are extended segment in the both sides of buckle (17), opened up respectively in the middle part of extended segment there are one
Smooth hole and threaded hole are screwed with screw in threaded hole, and the tail portion of screw is equipped with a circle projection portion, and knob is arranged in screw.
10. according to the operating method of acoustic emission test device of any rock mass of claim 1-9 in high confining pressure unloading,
It is characterized by comprising the following steps：
S1：According to the code requirement installation test block (21) of impact test, incident bar (23) and transmission bar (24) are adjusted, applies axis
To with radial oil pressure carry out impact test, at this time acoustic emission test device be located at both sides, do not interfere with impact test it is normal into
Row；
S2：After impact test, when needing to carry out acoustic emission test, removal axis pressure, by incident bar (23) and transmission bar (24)
It pulls open outward；
S3：Loosen the nut (16) on the quarter butt (14) of confining pressure device both sides；
S4：It is rotatablely connected the direction that bar (12) changes annulus A (11), annulus B (8), until protector for sensor (18) face
It is fixed to tighten nut (16) for the end face of test block (21)；
S5：It is uniformly coated with couplant in the detection faces of acoustic emission sensor (1), telescopic device is adjusted, finally makes detection faces and examination
Block (21) both ends end face is in close contact, in each optional one of both sides tenon (10) easy to operation, by (17) two half part of buckle
Packet outside and is pinched in tenon (10), and screw is successively inserted into smooth hole and threaded hole, is screwed on slightly, is adjusted and determine buckle (17)
Position on tenon (10), tightens screw and fixes；
S6：Instrument, the oil pressure in release confining pressure cylinder body (22), to test block (21) carry out sound are connected by the requirement of acoustic emission test
Transmitting test；
S7：After the completion of test, buckle (17), extracting sensor protective device (18) are removed, and annulus B (8) is pushed back to and circle
The position of ring A (11) fittings unclamps nut (16) and connecting rod (12) is rotated back into initial position；
S8：The incident bar removed (23) and transmission bar (24) are pushed into the position being bonded with test block (21) again, then apply axial direction
With radial oil pressure, you can continue the impact test under the conditions of high confining pressure.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553935A (en) * | 2019-10-16 | 2019-12-10 | 浙江科技学院 | dynamic punching joint cutting method |
| CN111044362A (en) * | 2019-12-05 | 2020-04-21 | 武汉理工大学 | Transient unloading device and rock mass transient unloading simulation test system |
| CN112665979A (en) * | 2020-12-15 | 2021-04-16 | 青岛理工大学 | Acoustic emission sensor fixing and sealing device for rock compression test and using method thereof |
| CN117054214A (en) * | 2023-07-31 | 2023-11-14 | 江汉大学 | Pressurized target device for light gas gun loading experiment and application method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000180319A (en) * | 1998-12-15 | 2000-06-30 | Saginomiya Seisakusho Inc | Rock compressing test simulating method and rock compressing test simulator |
| CN101813588A (en) * | 2010-04-13 | 2010-08-25 | 中国科学院武汉岩土力学研究所 | Pressure head device for loading normal triaxial rheology and testing acoustic emission under high confining pressure |
| CN102305829A (en) * | 2011-07-19 | 2012-01-04 | 山东科技大学 | Rock triaxial compression acoustic emission test system |
| CN103048187A (en) * | 2012-12-21 | 2013-04-17 | 中国矿业大学 | Fixing device for acoustic emission sensor used in rock triaxial test under confining pressure condition |
| CN104614249A (en) * | 2015-01-23 | 2015-05-13 | 山东大学 | Pressure chamber testing device and testing method for monitoring rock breaking multivariate precursory information |
| CN104977234A (en) * | 2015-06-23 | 2015-10-14 | 安徽理工大学 | Pressure rock failure and instability process and dynamic permeability test apparatus and method thereof |
| CN106918531A (en) * | 2016-12-28 | 2017-07-04 | 山东大学 | Can be used for multiphase coupled sound combination loading rock test rig and test method |
-
2018
- 2018-02-28 CN CN201810167062.XA patent/CN108398342B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000180319A (en) * | 1998-12-15 | 2000-06-30 | Saginomiya Seisakusho Inc | Rock compressing test simulating method and rock compressing test simulator |
| CN101813588A (en) * | 2010-04-13 | 2010-08-25 | 中国科学院武汉岩土力学研究所 | Pressure head device for loading normal triaxial rheology and testing acoustic emission under high confining pressure |
| CN102305829A (en) * | 2011-07-19 | 2012-01-04 | 山东科技大学 | Rock triaxial compression acoustic emission test system |
| CN103048187A (en) * | 2012-12-21 | 2013-04-17 | 中国矿业大学 | Fixing device for acoustic emission sensor used in rock triaxial test under confining pressure condition |
| CN104614249A (en) * | 2015-01-23 | 2015-05-13 | 山东大学 | Pressure chamber testing device and testing method for monitoring rock breaking multivariate precursory information |
| CN104977234A (en) * | 2015-06-23 | 2015-10-14 | 安徽理工大学 | Pressure rock failure and instability process and dynamic permeability test apparatus and method thereof |
| CN106918531A (en) * | 2016-12-28 | 2017-07-04 | 山东大学 | Can be used for multiphase coupled sound combination loading rock test rig and test method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553935A (en) * | 2019-10-16 | 2019-12-10 | 浙江科技学院 | dynamic punching joint cutting method |
| CN111044362A (en) * | 2019-12-05 | 2020-04-21 | 武汉理工大学 | Transient unloading device and rock mass transient unloading simulation test system |
| CN111044362B (en) * | 2019-12-05 | 2021-09-14 | 武汉理工大学 | Transient unloading device and rock mass transient unloading simulation test system |
| CN112665979A (en) * | 2020-12-15 | 2021-04-16 | 青岛理工大学 | Acoustic emission sensor fixing and sealing device for rock compression test and using method thereof |
| CN117054214A (en) * | 2023-07-31 | 2023-11-14 | 江汉大学 | Pressurized target device for light gas gun loading experiment and application method thereof |
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