CN109580399A - Middle low strain dynamic rate sound integration test system - Google Patents
Middle low strain dynamic rate sound integration test system Download PDFInfo
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- CN109580399A CN109580399A CN201811612616.9A CN201811612616A CN109580399A CN 109580399 A CN109580399 A CN 109580399A CN 201811612616 A CN201811612616 A CN 201811612616A CN 109580399 A CN109580399 A CN 109580399A
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces 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
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/01—Indexing codes associated with the measuring variable
- G01N2291/011—Velocity or travel time
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0232—Glass, ceramics, concrete or stone
Abstract
The present invention provides a kind of middle low strain dynamic rate sound integration test systems comprising: sample, heating plate, Rigid Plates Under Compression, acoustic emission sensor, static force loading device, power loading device, magnetostrictive displacement sensor, sample loading mechanism, load transducer.The present invention overcomes acoustic emission sensor anti-pressure ability is poor, can not work this defect under hyperbaric environment.Slotting is designed in the Rigid Plates Under Compression of rock sample six direction, slotting in Rigid Plates Under Compression should be cylindrical, fluting diameter should be 2 ~ 4 cm, acoustic emission sensor is embedded in Rigid Plates Under Compression, pass through active excitation and reception ultrasonic wave, analyze rock sample three-dimensional internal stress wave propagation feature, three dimensional anisotropic and heterogeneity.
Description
Technical field
The present invention relates to low strain dynamic rates in the coupling of the materials temperature and pressure such as mechanics of materials field more particularly to rock, concrete to add
Research on Mechanical Properties under carrier strip part.
Background technique
The dynamical problems such as shock and vibration, collision and explosion are widely present in World Science field.Many rock engineerings are asked
Topic, such as hot dry rock exploitation, oil-gas mining, coal mining and tunnel carry out belonging to kinetic regime.However it is ground in previous
In studying carefully, these rock engineering problems are often reduced to quasi-static problem and carry out analysis of experiments.Rock is under dynamic loads effect
There are significant difference, this simplification from dynamic analysis to quasi-static analysis under deformation and rupture rule are acted on static load
It will cause a deviation to the understanding and assessment of practical rock engineering problem.In this way not only bad for effectively the exploitation underground space and mine
Resource is produced, while being an impediment to the accurate evaluation of underground structure stability, then causes the loss of property and the threat of personnel safety.
The strain rate level locating for the rock is greater than 10-3s-1When, the influence of its own inertia effect be can not ignore, and be power
Learn research category.The experimental rig of the most frequently used test rock dynamic mechanical is Hopkinson bar pilot system, is capable of providing
Middle high strain-rate range, i.e., 101s-1To 102s-1Strain rate load in range.Current Hopkinson bar experimental rig is not only
Rock dynamic can be surveyed to press, draw, turning round, cutting mechanical characteristic, while can satisfy the dynamic disturbances load under the conditions of initial static force.Phase
Than for, middle low strain dynamic rate range, i.e., strain rate is 10-3s-1To 101s-1Experimental rig is relatively fewer in range.Conventional liquid
Pressure servo only up to provide 10-1s-1Strain rate load.Although drop hammer tester can provide 100s-1To 101s-1Range
Interior strain rate load, but the device experiment data acquisition is difficult, load control precision is not high and can not consider initial static force
Under the conditions of dynamic disturbances.In this regard, Logan and Handin develops power three-axis tester, and the device is using pneumatic
Hydraulic loaded mode can axially carry out dynamically load to the cylindrical sample that diameter and height are respectively 20mm and 40mm, and most
Larger Dynamic axis pressure is up to 100 tons.The 10000 type high voltage power triaxial apparatus of RDT-that Chinese Academy of Sciences's Wuhan ground is developed equally uses
Axially and radially both direction dynamically load may be implemented in Pneumatic hydraulic loading method respectively.Wherein axial static load and dynamic load be most
High 220 tons reachable, the dynamic load most fast load time is 9 milliseconds；Radial dynamic confining pressure reaches as high as 120 tons, and most fast load time
It is 40 milliseconds.The true triaxial sound load testing machine that Central South University develops passes through difference on the basis of applying static load
The disturbing rod of diameter (10 to 30 millimeters) applies local dynamic station disturbance to sample.Disturbance waveform is sine wave, and loading frequency is maximum
Up to 70Hz, and maximum dynamic disturbances power is 50 tons.China Mining Univ. (Beijing) development and design true triaxial impacts rock burst
For pilot system, it can be achieved that 16 kinds of different basic waveform loads, forcing frequency is 0~1Hz, 0~1mm of maximum displacement amplitude.
Strain rate is 10-3s-1To 101s-1In range in dynamic testing equipment, however it remains following problem:
1, the disturbance wave frequency rate of traditional hydraulic loaded method excitation is restricted.Due to existing servo valve response frequency
Limitation, elastic stress wave waveform frequency are often below 70Hz.The waveform needed using multiparty control this kind of for sine wave, frequency
Rate generally only has more than ten Hz or even a few Hz.Rock is extremely difficult to higher strain rate level, nothing in this low frequency wave disturbance
Method research strain rate is 10-1s-1To 101s-1The dynamic characteristics of rock in range.
Although 2, having scholar to attempt by carrying out dynamically load with Pneumatic hydraulic mode, this method can reach compared to liquid
Pressure loads faster loading speed, the power three-axis tester and Chinese Academy of Sciences's Wuhan ground that Logan and Handin are developed
10000 property high voltage power triaxial apparatus of RDT-can achieve 10 respectively1s-1With 100s-1The load of magnitude.But they are etc. to enclose
Press (i.e. σ2=σ3) three axis equipment, and specimen size is relatively small, diameter between 20 between 30mm, length between 40 to
Between 60mm.
3, true triaxial device test system test data obtains difficult, and it is straight with pressure head to be particularly due to six surfaces of sample
Contact, can not specimen surface paste foil gauge obtain test during sample deformation behaviour, be then more unable to monitor,
Sample internal dynamic mechanics parameter is obtained, three dimensional anisotropic and heterogeneity inside sample are analyzed.
4, the true triaxial loading device in major part under the load of low strain dynamic rate does not account for temperature to rock mechanics
Influence.
In general, rock true triaxial dynamic loading test system at present, is unable to reach strain rate 10-3s-1To 101s-1
The frequency of dynamically load in range, dynamic disturbances wave is not more than 70Hz, less than the frequency of most of dynamic disturbances load types, and
And the monitoring of sample dynamic mechanics parameter, acquisition difficulty, do not account for temperature environment locating for rock.
Summary of the invention
In order to solve the problems, such as that in the prior art, the present invention provides a kind of middle low strain dynamic rate sound integration experimental test systems
System, the test macro can be used for studying following rock engineering problem:
1, hot dry rock exploitation, dynamic pressure break problem involved in oil-gas mining；
2, the dynamic disturbances problem such as excavation, rock burst involved in mining engineering, mine shake, bump；
3, the dynamic disturbances problem such as broken rock, explosion involved in tunnel piercing；
4, underground structure stability problem under the disturbance such as earthquake, bullet train load action.
A kind of middle low strain dynamic rate sound integration test system comprising: sample, heating plate, Rigid Plates Under Compression, sound hair
Penetrate sensor, static force loading device, power loading device, magnetostrictive displacement sensor, sample loading mechanism, load sensing
Device；
The test macro includes the power loading device of X, Y and Z tri- direction static force loading devices and independent Z-direction,
Wherein each two static force loading devices of X, Y-direction, one static force loading device of Z-direction, test sample are placed in sample load machine
In structure, magnetostrictive displacement sensor and load transducer are installed respectively on 5 static force loading devices；
The heating plate depends on specimen surface and directly heats to sample, built-in in the heating plate with sample contacts
Heating tube；6N slotting, N=2 or N=3 or N=4 or N=5 or N=6,6N are equipped in the Rigid Plates Under Compression of sample six direction
Acoustic emission sensor is embedded in Rigid Plates Under Compression, and the acoustic emission sensor, which has, actively excites and receive ultrasonic wave energy.
As a further improvement of the present invention, static force loading device is static-force hydraulic servo-cylinder.
As a further improvement of the present invention, power loading device specific structure is as follows: it includes servo controller, oil sources
Controller, electro-hydraulic servo control software, time waveform replication software, signal conditioning unit and sensor, hydraulic linear vibration excitor,
Hydraulic oil source and separator；By Ethernet by servo controller, Oil-source control device and electro-hydraulic servo control software, time domain waveform
It reproduces software to be connected, by the data of signal conditioning unit and sensor, hydraulic linear exciting is controlled using servo controller
Device controls hydraulic oil source and separator using Oil-source control device by control and measuring signal.
As a further improvement of the present invention, the acoustic emission sensor is built in Rigid Plates Under Compression, by suitably coupling
Agent guarantees that sensor comes into full contact with pressing plate.
As a further improvement of the present invention, temperature is carried out to sample by injecting hot oil or coolant liquid into heating tube
Control.
As a further improvement of the present invention, temperature sensor is built in heating plate, monitors temperature of heating plate in real time.
As a further improvement of the present invention, the slotting in Rigid Plates Under Compression is cylinder, and fluting diameter is 2~4cm.
As a further improvement of the present invention, the range value of heating tube heating temperature is 20 DEG C to 200 DEG C.
The beneficial effects of the present invention are:
The present invention obtains difficulty for true triaxial test macro test data, is especially unable to monitor sample internal dynamic power
This phenomenon of parameter is learned, high temperature is realized and middle low strain dynamic rate loads lower solid dynamic anisotropic and heteropical test system
System.
The present invention overcomes acoustic emission sensor anti-pressure ability is poor, can not work this defect under hyperbaric environment, in rock
Totally 24 slottings are designed in the Rigid Plates Under Compression of stone sample six direction, the slotting in Rigid Plates Under Compression should be cylindrical, diameter of slotting
It should be 2~4cm, 24 acoustic emission sensors be embedded in Rigid Plates Under Compression, by active excitation and reception ultrasonic wave, analyze rock
Stone sample three-dimensional internal stress wave propagation feature, three dimensional anisotropic and heterogeneity.
The Mechanics Performance Testing of suitable for multiple sizes rock sample of the present invention.
1. static loading module
The present invention uses hydraulic-servo-load, axial (Z axis) and laterally (X, Y-axis) can realize respectively 0~3000KN and 0~
Servo static loading within the scope of 700KN, wherein Z axis oil cylinder has the piston stroke of ± 20mm, each oil cylinder tool of X, Y direction
There is the piston stroke of ± 10mm.
The present invention has the function of hydraulic fracturing, it is possible to provide the stress of 0~80MPa hydraulic fracturing, oil cylinder maximum working pressure (MWP)
20MPa；Oil cylinder stroke 200mm, displacement 240ml.
2. temperature loading module
Temperature control modules of the present invention directly heat the temperature control mode of thermometric using six faces, and by PID (ratio, integral,
Differential) accurately control to adjust.
Test specimen temperature controlling range of the present invention is room temperature to 200 DEG C, and it is 0.1 DEG C that temperature of heating plate, which controls precision, and temperature passes
Sensor precision ± 0.1 DEG C, can carry temperature range is respectively Z-direction 0KN~3000KN, X, Y-direction 0KN~700KN.
3. dlm (dynamic loading module)
The dynamic loads frequency of conventional hydraulic loading system excitation is often below 70Hz, for needing the sine of multiparty control
Wave, frequency generally only have more than ten Hz or even a few Hz.Present hydraulic cylinder require to realize loading stress wave frequency rate reach 0.1~
Servo is controllable within the scope of 300Hz, and maximum dynamic excitation power, up to 1000KN, amplitude range ± 0.15mm, corresponding LOADING RATES reaches
To 101s-1Magnitude.
The load of the random waveforms such as rectangular wave, triangular wave, sine wave can be achieved in the present invention.The mode of action for disturbing load can be real
Now put action mode (disturbance of local dip bar) and face action mode.
The present invention passes through the adaptive width phase control compensation technique of advanced servo, identification frequency domain iteration Self-learning control algorithm
Etc. control technologies combine, high performance fluid dynamic technology actuator executes movement, final to realize subjects in constant amplitude control
System is lower and time domain waveform reappears under control by stress variation when vibrating.
Overall structure of the present invention is enclosed type, has voltage-limiting protection, off-load, functional characteristics such as high efficiency, low noise, and can
According to test demand volume simultaneously or separately output power.
Detailed description of the invention
Fig. 1 is a kind of middle low strain dynamic rate sound integration test system X/Y plane figure of the present invention；
Fig. 2 is a kind of middle low strain dynamic rate sound integration test system XZ plan view of the present invention；
Fig. 3 is a kind of middle low strain dynamic rate sound integration test system power loading device composition figure of the present invention；
Fig. 4 is sample and heating board structure schematic diagram of the invention；
Fig. 5 to Fig. 7 is sample of the invention, heating plate and Rigid Plates Under Compression schematic diagram.
Component names are as follows in figure:
Sample 101, heating plate 102, Rigid Plates Under Compression 103, acoustic emission sensor 104；
Static force loading device 201, power loading device 202, magnetostrictive displacement sensor 203, sample loading mechanism
204, load transducer 205；
Servo controller 301, Oil-source control device 302, electro-hydraulic servo control software 303, time waveform replication software 304,
Signal conditioning unit and sensor 305, hydraulic linear vibration excitor 306, hydraulic oil source and separator 307.
English abbreviation PID herein: ratio, integral, differential.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
Test macro of the invention, introduces dynamically load and kinetic parameter obtains function, realizes strain rate 10-3s-1Extremely
101s-1Rock dynamic characteristics are studied in range, low strain dynamic rate sound integration true triaxial test test macro in development.
As depicted in figs. 1 and 2, Fig. 1 is middle low strain dynamic rate sound integration test system X/Y plane figure, during Fig. 2 is
Low strain dynamic rate sound integration test system XZ plan view.Test macro of the invention includes tri- direction static(al)s of X, Y and Z
The power loading device 202 of loading device 201 and independent Z-direction, wherein each two static force loading devices 201 of X, Y-direction, the side Z
To a static force loading device 201, static force loading device 201 is static-force hydraulic servo-cylinder.X, four static-force hydraulics of Y-direction are watched
Oil cylinder is taken, each highest can provide 700KN static pressure, and a static-force hydraulic servo-cylinder highest of Z-direction can be improved
3000KN static pressure.Test sample is placed in sample loading mechanism 204, is pacified respectively on 5 static-force hydraulic servo-cylinders
Magnetostrictive displacement sensor 203 and load transducer 205 are filled, for displacement of pressing head and load in precise measurement loading procedure
Power.
202 specific structure of power loading device is as follows: as shown in figure 3, passing through Ethernet for servo controller 301, oil sources
Controller 302 is connected with electro-hydraulic servo control software 303, time waveform replication software 304, by signal conditioning unit and passes
The data of sensor 305 control hydraulic linear vibration excitor 306 using servo controller 301.By control and measuring signal, use
Oil-source control device 302 controls hydraulic oil source and separator 307.Dynamic deformation, load and displacement data acquisition use high speed acquisition
Card is subjected to 8 channel analogy amount signals, using data up to 10KHz.Hydraulic servo system is designed using flow gradients, hydraulic power
Pumping plant provides power by 2 sets of pump machines.Test controls static-force hydraulic servo-cylinder first, reaches the target quiescent of three loading directions
Load keeps controlling dynamic loading system after stablizing, applies dynamic disturbances to sample.
Heating plate 102 depends on six surfaces of rock sample and is directly heated, in the heating plate contacted with sample 101
Heating pipe built-in carries out temperature control to sample by injecting hot oil or coolant liquid into heating tube.Temperature sensor, which is built in, to be added
In hot plate, temperature of heating plate is monitored in real time, and accurately adjust using PID (ratio, integral, differential), to guarantee each heating plate
Reach target temperature.
24 acoustic emission sensors 104 are built in Rigid Plates Under Compression 103, guarantee sensor and pressing plate by appropriate couplant
It comes into full contact with.Respectively to rock sample after original state rock sample, test and for test requirements document, to different stress states
Lower rock sample carries out dynamic mechanics parameter monitoring and obtains.Specific implementation process is as follows:
1: six surfaces of rock are numbered: X1, X2, Y1, Y2, Z1 and Z2, and the sound being built on six faces is sent out
It penetrates sensor to be successively numbered, S1, S2, S3 ... S22, S23 and S24.
2: using S1 bugle call emission sensor active excitation ultrasound wave, and wave recording triggered time.It records and counts respectively
Calculate the received ultrasonic wave waveform of remaining 23 sensors, waveform triggered time and corresponding velocity of wave V1_S2, V1_S3, V1_S4…
..V1_S24。
V1_Sj=d1_Sj/t1_Sj
Wherein j=2,3,4 ..., 24, d1_SjIndicate Sj sensor to S1 sensor distance, t1_SjIndicate ultrasonic wave
The time required to propagating to Sj sensor by S1 sensor
3: be repeated in second step, be respectively adopted No. S2 to S24 bugle call emission sensor active excitation ultrasound wave, record and
Calculate waveform triggered time and remaining 23 acoustic emission sensors institute received ultrasonic wave waveform, waveform triggered time and correspondence
Velocity of wave Vi_Sj, wherein i indicates that excitation waveform sensor number, j indicate to receive waveform sensor number.
4: receiving the triggered time of ultrasonic wave by different acoustic emission sensors, rock is calculated by the method for shape function interpolation
The triaxiality wave velocity of wave of different zones inside stone, the specific steps are as follows:
1) the velocity of wave V that will be obtainedi_SjDecompose to tri- coordinate direction V of X, Y and Zi_Sj-X, Vi_Sj-YAnd Vi_Sj-Z。
2) three-dimensional interpolation function is determined:
N in formulaiFor the interpolating function of node i, i=1,2,3 ... ... 24；M, n, p respectively represent each coordinate direction
Ranks number subtracts 1, i.e. the number of each coordinate direction lagrange polynomial；I, J, K indicate node i in each coordinate direction
Ranks number.WithIt can be determined by following formula:
ξ in formula, η and ζ are three coordinate directions in local coordinate system, respectively correspond X in rectangular coordinate system, Y and Z tri- seats
Mark direction；N=24 is number of probes；(ξ, η, ζ) is the position at any point inside sample；(ξj, ηj, ζj) it is each sensing
Device corresponds to the coordinate value in local coordinate system.
3) sample interior three-dimensional stress wave velocity of wave is determined
The X at any point inside sample, Y and the stress wave velocity of wave of Z-direction can be obtained by following formula:
By obtained rock interior triaxiality wave velocity of wave and ultrasonic amplitude and frequency, the three-dimensional of rock sample is specified
Anisotropy and heterogeneity.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (8)
1. a kind of middle low strain dynamic rate sound integration test system, it is characterised in that: comprising: sample (101), heating plate
(102), Rigid Plates Under Compression (103), acoustic emission sensor (104), static force loading device (201), power loading device (202), magnetic
Cause telescopic displacement sensor (203), sample loading mechanism (204), load transducer (205)；
The test macro includes the power loading device of X, Y and Z tri- direction static force loading devices (201) and independent Z-direction
(202), wherein each two static force loading devices (201) of X, Y-direction, one static force loading device (201) of Z-direction, test sample
(101) it is placed in sample loading mechanism (204), installation magnetostrictive displacement passes respectively on 5 static force loading devices (201)
Sensor (203) and load transducer (205)；
The heating plate (102) depends on sample (101) surface and directly heats to sample (101), connects with sample (101)
Heating pipe built-in in the heating plate (102) of touching；6N slotting, N are equipped in the Rigid Plates Under Compression (103) of sample (101) six direction
=2 or N=3 or N=4 or N=5 or N=6,6N acoustic emission sensor (104) are embedded in Rigid Plates Under Compression, the sound emission
Sensor, which has, actively excites and receives ultrasonic wave energy.
2. middle low strain dynamic rate sound integration test system according to claim 1, it is characterised in that: static loading
Device (201) is static-force hydraulic servo-cylinder.
3. middle low strain dynamic rate sound integration test system according to claim 1, it is characterised in that: power load
Device (202) specific structure is as follows: it includes servo controller (301), Oil-source control device (302), electro-hydraulic servo control software
(303), time waveform replication software (304), signal conditioning unit and sensor (305), hydraulic linear vibration excitor (306), liquid
Pressure oil source and separator (307)；By Ethernet by servo controller (301), Oil-source control device (302) and electro-hydraulic servo control
Software (303), time waveform replication software (304) are connected, and by the data of signal conditioning unit and sensor (305), adopt
Hydraulic linear vibration excitor (306) are controlled with servo controller (301), by control and measuring signal, using Oil-source control device
(302) hydraulic oil source and separator (307) are controlled.
4. middle low strain dynamic rate sound integration test system according to claim 1, it is characterised in that: the sound hair
It penetrates sensor (104) to be built in Rigid Plates Under Compression, guarantees that sensor comes into full contact with pressing plate by appropriate couplant.
5. middle low strain dynamic rate sound integration test system according to claim 1, it is characterised in that: by adding
Hot oil or coolant liquid are injected in heat pipe, and temperature control is carried out to sample.
6. middle low strain dynamic rate sound integration test system according to claim 1, it is characterised in that: pass temperature
Sensor is built in heating plate, monitors temperature of heating plate in real time.
7. middle low strain dynamic rate sound integration test system according to claim 1, it is characterised in that: Rigid Plates Under Compression
In slotting be cylinder, fluting diameter be 2~4cm.
8. middle low strain dynamic rate sound integration test system according to claim 1, it is characterised in that: heating tube adds
The range value of hot temperature is 20 DEG C to 200 DEG C.
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| CN201811612616.9A CN109580399A (en) | 2018-12-27 | 2018-12-27 | Middle low strain dynamic rate sound integration test system |
| PCT/CN2019/115489 WO2020134581A1 (en) | 2018-12-27 | 2019-11-05 | Medium-low strain-based dynamic static integrated experimental test system |
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| CN201811612616.9A CN109580399A (en) | 2018-12-27 | 2018-12-27 | Middle low strain dynamic rate sound integration test system |
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| CN110044709A (en) * | 2019-05-31 | 2019-07-23 | 中国平煤神马能源化工集团有限责任公司 | A kind of monitoring device for true triaxial test |
| WO2020134581A1 (en) * | 2018-12-27 | 2020-07-02 | 深圳大学 | Medium-low strain-based dynamic static integrated experimental test system |
| CN112461670A (en) * | 2020-11-10 | 2021-03-09 | 中国矿业大学 | Static and dynamic loading experiment machine and method for simulating underground roadway tunneling and drilling operation |
| CN112504847A (en) * | 2020-10-30 | 2021-03-16 | 中国科学院武汉岩土力学研究所 | Rock dynamic and static true/normal triaxial shear rheological THMC multi-field coupling test device |
| CN112595606A (en) * | 2020-09-30 | 2021-04-02 | 华能澜沧江水电股份有限公司 | Multi-direction rock shearing test system capable of realizing ultrasonic testing |
| CN113203627A (en) * | 2021-05-10 | 2021-08-03 | 北京科技大学 | Method for testing and evaluating mechanical heterogeneity of rock based on acoustic emission |
| CN113324838A (en) * | 2020-02-28 | 2021-08-31 | 新奥科技发展有限公司 | Triaxial test device and system |
| CN113567539A (en) * | 2021-07-26 | 2021-10-29 | 广西电网有限责任公司玉林供电局 | Nondestructive testing method for tower foundation bolt |
| CN113899628A (en) * | 2021-09-15 | 2022-01-07 | 中国石油天然气股份有限公司 | Testing machine for testing triaxial stress and acoustic emission of rock at high temperature and high pressure |
| CN114216970A (en) * | 2021-12-16 | 2022-03-22 | 广西大学 | Acoustic emission/microseismic sensor installation mechanism in rock indoor test and installation method |
| CN114526987A (en) * | 2022-01-17 | 2022-05-24 | 天津大学 | Test fixture and test method for rock burst in single-face empty state of rock |
| CN114965074A (en) * | 2022-04-26 | 2022-08-30 | 安徽理工大学 | NMR in-situ ultrahigh dynamic and static cooperative loading test device and application method |
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