CN206208842U - A kind of experimental rig and pilot system that coal containing methane gas Burst Tendency index and acoustic feature are measured for uniaxial compression - Google Patents
A kind of experimental rig and pilot system that coal containing methane gas Burst Tendency index and acoustic feature are measured for uniaxial compression Download PDFInfo
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- CN206208842U CN206208842U CN201621326641.7U CN201621326641U CN206208842U CN 206208842 U CN206208842 U CN 206208842U CN 201621326641 U CN201621326641 U CN 201621326641U CN 206208842 U CN206208842 U CN 206208842U
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- seaming chuck
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- acoustic feature
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Abstract
The utility model is related to a kind of experimental rig and pilot system that coal containing methane gas Burst Tendency index and acoustic feature are measured for uniaxial compression, the experimental rig includes base, sealing drum, top pressure closure and seaming chuck, sealing drum is detachably connected with base and top pressure closure respectively, and seaming chuck coordinates with the scalloped channels gap of top pressure closure center；Base center is coaxially provided with push-down head with seaming chuck, and upper and lower pressure head corresponding position is respectively provided with the cell body for accommodating ultrasonic probe；The lead channels of inlet channel and exhaust passage and ultrasonic probe are respectively equipped with seaming chuck and base；Base both sides are additionally provided with the bnc interface and one-wire interface for being respectively used to be connected with acoustic emission sensor and stressometer, and the respective wire of bnc interface and one-wire interface is passed from base.The utility model can ensure that coal sample carries out uniaxial compression experiment under certain gas pressure, and obtain accurately relevant parameter data.
Description
Technical field
The utility model belongs to the mechanics and acoustics properties study technology of coal containing methane gas in process of coal mining, more particularly to
A kind of experimental rig and pilot system that coal containing methane gas Burst Tendency index and acoustic feature are measured for uniaxial compression.
Background technology
The unstability of coal petrography system is the prerequisite that coal rock gas dynamic disaster occurs, and whether unstable failure occurs, and takes
Certainly whether there is strength failure and corresponding mechanical response in coal seam with gas.Coal is a kind of complicated porous media, natural
Adsorbent, adsorbable substantial amounts of gas in coal body.Therefore, research coal rock gas dynamic disaster should first study gas to coal body thing
The influence of mechanical characteristic is managed, this is the basis for studying coal seam with gas failure mechanism and constitutive relation.Existing correlative study master
If being carried out in the case of normal triaxial.But coal petrography mechanics index of physics is obtained under single shaft effect mostly in national standard
's.Therefore, if the mechanical index under the effect of coal seam with gas single shaft can be determined to refer to without coal body mechanics in the case of gas
Mark is subject to comparative analysis, then the affecting laws of the presence to coal body physico-mechanical properties of gas can be further disclosed, so that more
Further disclose the mechanism of disaster.
Utility model content
The purpose of this utility model is to provide a kind of for uniaxial compression measurement coal containing methane gas Burst Tendency index and sound
Learn the experimental rig and pilot system of feature, it is ensured that coal sample carries out uniaxial compression experiment under certain gas pressure, and takes
Obtain accurately relevant parameter data.
In order to solve the above technical problems, the technical solution adopted in the utility model is as follows：
A kind of experimental rig that coal containing methane gas Burst Tendency index and acoustic feature are measured for uniaxial compression, the examination
Experiment device includes base, sealing drum, top pressure closure and seaming chuck, and sealing drum is detachably connected with base and top pressure closure respectively,
Seaming chuck coordinates with the scalloped channels gap of top pressure closure center；Base center is coaxially provided with push-down head with seaming chuck, upper,
Push-down head corresponding position is respectively provided with the cell body for accommodating ultrasonic probe；Inlet channel and row are respectively equipped with seaming chuck and base
The lead channels of gas passage and ultrasonic probe；Base both sides are additionally provided with and are respectively used to be connected with acoustic emission sensor and stressometer
Bnc interface and one-wire interface, the respective wire of bnc interface and one-wire interface passes from base.
Preferably, the sealing drum is respectively equipped with seal washer with the joint of top pressure closure and base.
Preferably, seaming chuck is provided with positioning boss at correspondence top pressure closure bottom surface, and top pressure closure bottom surface is provided with and positioning
The detent that boss coordinates.
Preferably, top pressure closure is provided with seal washer in the scalloped channels inwall coordinated with seaming chuck.
Preferably, the seaming chuck and push-down head corresponding position are all detachable is provided with for being bonded the ventilative of ultrasonic probe
Plate, air-vent is provided with air permeable plate at correspondence inlet channel and exhaust passage, is provided with annular saturating at air permeable plate correspondence ultrasonic probe
Air drain.
Preferably, the push-down head outer wall is arranged with the positioning tube for positioning coal sample post, and the top surface level of positioning tube is high
Ventilative plate top surface level height of the degree more than push-down head.
Using the above-mentioned experimental rig that coal containing methane gas Burst Tendency index and acoustic feature are measured for uniaxial compression
Pilot system, the system is also filled out including acoustic feature measurement apparatus, stress-strain measurement device, ultrasonic sensor and gas
Fill and put；The ultrasonic device for measuring includes the upper and lower ultrasonic probe being located at respectively in upper and lower head tank body, and upper and lower ultrasound is visited
Head is bonded on air permeable plate and passes wire by lead channels and be connected with extraneous Intelligence Ultrasound comprehensive tester；
The acoustic feature measurement apparatus include the acoustic emission sensor inside sealing drum, and acoustic emission sensor passes through
Wire is connected with bnc interface, and bnc interface passes base and is connected with extraneous acoustic emission automonitor by wire；
The stress-strain measurement device includes the stressometer inside sealing drum, and stressometer is connect by wire with single line
Mouth connection, one-wire interface passes base and is connected with extraneous stress-strain gage by wire；
The gas filling device includes vacuum device and gas inflation mechanism, and vacuum device includes passing through exhaust tube
The aspiration pump being connected with seaming chuck inlet channel, gas inflation mechanism includes the gas tube being connected with exhaust tube by three-way pipe,
Gas tube is connected with gas pot, and the exhaust tube between three-way pipe and aspiration pump is provided with the first valve, and gas tube is provided with air pressure
Table and the second valve；
The exhaust passage of the base is in communication with the outside by blast pipe, and blast pipe is provided with the 3rd valve.
It is first when carrying out uniaxial compression measurement coal containing methane gas Burst Tendency index and acoustic feature using above-mentioned pilot system
First need assembly system, upper and lower ultrasonic probe is placed in it is in corresponding groove and Nian Jie with air permeable plate, then will be by connector
Air permeable plate is fixed on upper and lower pressure head, then coal sample column sleeve is connected in the middle of the positioning sleeve of push-down head, then by stressometer harmony
Emission sensor is bonded in coal sample post surface by couplant, then causes that the air permeable plate at seaming chuck and push-down head compresses coal sample
Post, is finally assembled sealing drum, top pressure closure set, seaming chuck and base by connector；After system assembling is finished, pass through
Vacuum device is vacuumized to sealing ring inside, and then filling gas to air gauge to sealing ring inside by gas inflation mechanism refers to
Number does not produce change, is then shut off respective valves, seaming chuck is loaded by the servo pressure head of rock mechanics experiment machine, is unloaded
Load pressure, and the data variation of Intelligence Ultrasound comprehensive tester, acoustic emission automonitor pressure and stress-strain gage is recorded, arrangement is obtained final product
The stress-strain full distance curve of the coal containing methane gas uniaxial compression test, characteristics of Acoustic Emission Parameter Map and compressional wave, shear wave waveform
Figure；
3）Pressure release is split, and the gas in sealing drum is discharged in experiment by blast pipe after finishing, then according to the 1st）Step
Contrary operation, is dismounted to each mechanism.
The utility model compared with prior art, has the following advantages that：
1）The utility model compensate for using the Burst Tendency and acoustical characteristic parameters of uniaxial compression measurement coal containing methane gas
Some drawbacks of Burst Tendency indication test method in the prior art, the Practical Project feelings of the data of measurement closer to colliery
Condition, is that the prediction preventing and treating of rock blast hazard is offered reference；
2）Acoustic emission sensor is placed in inside, it is directly adhered to coal sample post surface, it is to avoid in the prior art sends out sound
Penetrate sensor it is external caused by the problems such as signal is not received, disturbing factor is more, the accuracy of acoustic emission signal is carried significantly
Height, and then improve the reliability of acoustic emission monitor(ing)；
3）Closed closure is carried out to the junction of each mechanism using multiple sealing rings, it is ensured that the sealing inside sealing ring
Property, improve the accuracy of relevant parameter；
4）Compact structure is simple and vdiverse in function, can simultaneously realize monitor stress strain, acoustic emission signal and acoustic signals,
And the utility model is after the external device (ED) component with coal containing methane gas triaxial compression test is connected, you can carry out containing gas
Coal triaxial compression test.
Brief description of the drawings
Fig. 1 is to measure coal containing methane gas Burst Tendency index and acoustic feature for uniaxial compression in specific embodiment
The structural representation of experimental rig；
Fig. 2 is the structural representation of top pressure closure in experimental rig shown in Fig. 1；
Fig. 3 is the structural representation of air permeable plate in experimental rig shown in Fig. 1；
Fig. 4 is the structure of the pilot system that coal containing methane gas Burst Tendency index and acoustic feature are measured for uniaxial compression
Schematic diagram.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and implementation
Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only used to explain
The utility model, is not used to limit the utility model.
As Figure 1-4, a kind of examination that coal containing methane gas Burst Tendency index and acoustic feature are measured for uniaxial compression
Experiment device, the experimental rig include base 10, sealing drum 20, top pressure closure 30 and seaming chuck 40, sealing drum 20 respectively with bottom
Seat 10 and top pressure closure 30 are detachably connected, and sealing drum 20 is respectively equipped with seal washer with the joint of top pressure closure and base
21, seaming chuck 40 coordinates with the gap of scalloped channels 31 of the center of top pressure closure 30, and the inwall of scalloped channels 31 is provided with sealing gasket
Circle 32, seaming chuck 40 is provided with positioning boss 45 at correspondence top pressure closure 30 bottom surface, and the bottom surface of top pressure closure 30 is provided with and convex
The detent 33 that platform 45 coordinates；Base center is coaxially provided with push-down head with seaming chuck, is respectively equipped with seaming chuck and base
The lead channels 16 of the lead channels 42 of inlet channel 41 and exhaust passage 15 and upper ultrasonic probe and lower ultrasonic probe；Upper,
Push-down head corresponding position is respectively provided with the cell body 44 and cell body 13 for accommodating ultrasonic probe, and seaming chuck and push-down head corresponding position pass through
Bolt is provided with the air permeable plate 43 for being bonded ultrasonic probe, is provided with correspondence inlet channel 41 and exhaust passage 15 on air permeable plate 43
Air-vent 18, is provided with annular gas permeable groove 17 at the corresponding ultrasonic probe of air permeable plate 43, mounting hole is provided with the corresponding bolt of air permeable plate 43
19, the push-down head outer wall is arranged with the positioning tube 14 for positioning coal sample post, under the top surface level height of positioning tube 14 is more than
The ventilative plate top surface level height of pressure head；Base both sides are additionally provided with and are respectively used to what is be connected with acoustic emission sensor and stressometer
The respective wire of bnc interface 11 and one-wire interface 12, bnc interface 11 and one-wire interface 12 is passed from base.
Using the above-mentioned experimental rig that coal containing methane gas Burst Tendency index and acoustic feature are measured for uniaxial compression
Pilot system, the system is also filled out including acoustic feature measurement apparatus, stress-strain measurement device, ultrasonic sensor and gas
Fill and put；The ultrasonic device for measuring is including in upper ultrasonic probe 80 respectively in seaming chuck cell body, push-down head cell body
Lower ultrasonic probe 81, upper and lower ultrasonic probe be bonded on air permeable plate 43 and by corresponding lead channels by wire pass and with
Extraneous Intelligence Ultrasound comprehensive tester 82 is connected；
The acoustic feature measurement apparatus include the acoustic emission sensor 60 inside sealing drum 20, acoustic emission sensor
It is connected with bnc interface 11 by wire 60, bnc interface 11 passes base and connects with extraneous acoustic emission automonitor 61 by wire
Connect；
The stress-strain measurement device includes the stressometer 70 inside sealing drum, and stressometer 70 passes through wire and list
Line interface 12 is connected, and one-wire interface 12 passes base and is connected with extraneous stress-strain gage 71 by wire；
The gas filling device includes vacuum device and gas inflation mechanism, and vacuum device includes passing through exhaust tube
The aspiration pump 90 being connected with seaming chuck inlet channel 41, gas inflation mechanism is included by filling that three-way pipe 92 is connected with exhaust tube
Tracheae, gas tube is connected with gas pot 93, and the exhaust tube between three-way pipe 92 and aspiration pump 90 is provided with the first valve 91, inflation
Pipe is provided with the valve 94 of air gauge 95 and second；
The exhaust passage 15 of the base is in communication with the outside by blast pipe, and blast pipe is provided with the 3rd valve 96.
It is first when carrying out uniaxial compression measurement coal containing methane gas Burst Tendency index and acoustic feature using above-mentioned pilot system
First need assembly system, upper and lower ultrasonic probe is placed in it is in corresponding groove and Nian Jie with air permeable plate, then will be by connector
Air permeable plate is fixed on upper and lower pressure head, then coal sample column sleeve is connected in the middle of the positioning sleeve of push-down head, then by stressometer harmony
Emission sensor is bonded in coal sample post surface by couplant, then causes that the air permeable plate at seaming chuck and push-down head compresses coal sample
Post, is finally assembled sealing drum, top pressure closure set, seaming chuck and base by connector；After system assembling is finished, pass through
Vacuum device is vacuumized to sealing ring inside, and then filling gas to air gauge to sealing ring inside by gas inflation mechanism refers to
Number does not produce change, is then shut off respective valves, seaming chuck is loaded by the servo pressure head of rock mechanics experiment machine, is unloaded
Load pressure, and the data variation of Intelligence Ultrasound comprehensive tester, acoustic emission automonitor pressure and stress-strain gage is recorded, arrangement is obtained final product
The stress-strain full distance curve of the coal containing methane gas uniaxial compression test, characteristics of Acoustic Emission Parameter Map and compressional wave, shear wave waveform
Figure；
3）Pressure release is split, and the gas in sealing drum is discharged in experiment by blast pipe after finishing, then according to the 1st）Step
Contrary operation, is dismounted to each mechanism.
Claims (7)
1. a kind of experimental rig that coal containing methane gas Burst Tendency index and acoustic feature are measured for uniaxial compression, its feature exists
In the experimental rig includes base, sealing drum, top pressure closure and seaming chuck, and sealing drum respectively can with base and top pressure closure
Dismounting connection, seaming chuck coordinates with the scalloped channels gap of top pressure closure center；Base center is coaxially provided with seaming chuck
Push-down head, upper and lower pressure head corresponding position is respectively provided with the cell body for accommodating ultrasonic probe；Be respectively equipped with seaming chuck and base into
The lead channels of gas passage and exhaust passage and ultrasonic probe；Base both sides be additionally provided be respectively used to acoustic emission sensor and
The respective wire of the bnc interface and one-wire interface of stressometer connection, bnc interface and one-wire interface is passed from base.
2. it is as claimed in claim 1 to be used for the experiment that uniaxial compression measures coal containing methane gas Burst Tendency index and acoustic feature
Device, it is characterised in that the sealing drum is respectively equipped with seal washer with the joint of top pressure closure and base.
3. it is as claimed in claim 1 to be used for the experiment that uniaxial compression measures coal containing methane gas Burst Tendency index and acoustic feature
Device, it is characterised in that seaming chuck is provided with positioning boss at correspondence top pressure closure bottom surface, and top pressure closure bottom surface is provided with and positioning
The detent that boss coordinates.
4. it is as claimed in claim 1 to be used for the experiment that uniaxial compression measures coal containing methane gas Burst Tendency index and acoustic feature
Device, it is characterised in that the scalloped channels inwall that top pressure closure coordinates with seaming chuck is provided with seal washer.
5. it is as claimed in claim 1 to be used for the experiment that uniaxial compression measures coal containing methane gas Burst Tendency index and acoustic feature
Device, it is characterised in that the seaming chuck and push-down head corresponding position are all detachable to be provided with for being bonded the ventilative of ultrasonic probe
Plate, air-vent is provided with air permeable plate at correspondence inlet channel and exhaust passage, is provided with annular saturating at air permeable plate correspondence ultrasonic probe
Air drain.
6. it is as claimed in claim 5 to be used for the experiment that uniaxial compression measures coal containing methane gas Burst Tendency index and acoustic feature
Device, it is characterised in that the push-down head outer wall is arranged with the positioning tube for positioning coal sample post, the top surface level of positioning tube is high
Ventilative plate top surface level height of the degree more than push-down head.
7. using the examination for measuring coal containing methane gas Burst Tendency index and acoustic feature described in claim 1-6 for uniaxial compression
The pilot system of experiment device, it is characterised in that the system also include acoustic feature measurement apparatus, stress-strain measurement device,
Ultrasonic sensor and gas filling device；The ultrasonic sensor includes upper and lower in upper and lower head tank body respectively
Ultrasonic probe, upper and lower ultrasonic probe is bonded on air permeable plate and passes wire by lead channels and surpass with extraneous intelligence
Sound comprehensive tester is connected；
The acoustic feature measurement apparatus include the acoustic emission sensor inside sealing drum, and acoustic emission sensor passes through wire
It is connected with bnc interface, bnc interface passes base and is connected with extraneous acoustic emission automonitor by wire；
The stress-strain measurement device includes the stressometer inside sealing drum, and stressometer is connected by wire with one-wire interface
Connect, one-wire interface passes base and is connected with extraneous stress-strain gage by wire；
The gas filling device include vacuum device and gas inflation mechanism, vacuum device include by exhaust tube with it is upper
The aspiration pump of pressure head inlet channel connection, gas inflation mechanism includes the gas tube being connected with exhaust tube by three-way pipe, inflation
Pipe is connected with gas pot, and the exhaust tube between three-way pipe and aspiration pump is provided with the first valve, gas tube be provided with air gauge with
Second valve；
The exhaust passage of the base is in communication with the outside by blast pipe, and blast pipe is provided with the 3rd valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621326641.7U CN206208842U (en) | 2016-12-06 | 2016-12-06 | A kind of experimental rig and pilot system that coal containing methane gas Burst Tendency index and acoustic feature are measured for uniaxial compression |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621326641.7U CN206208842U (en) | 2016-12-06 | 2016-12-06 | A kind of experimental rig and pilot system that coal containing methane gas Burst Tendency index and acoustic feature are measured for uniaxial compression |
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| Publication Number | Publication Date |
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| CN206208842U true CN206208842U (en) | 2017-05-31 |
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| CN201621326641.7U Expired - Fee Related CN206208842U (en) | 2016-12-06 | 2016-12-06 | A kind of experimental rig and pilot system that coal containing methane gas Burst Tendency index and acoustic feature are measured for uniaxial compression |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109163966A (en) * | 2018-10-26 | 2019-01-08 | 煤科集团沈阳研究院有限公司 | The experimental provision that a kind of measuring temperature and gas influence coal sample mechanical property |
| CN109374742A (en) * | 2017-08-09 | 2019-02-22 | 中国石油化工股份有限公司 | Evaluation system for carbonate formation rock sound mechanical response characteristic |
| CN109708975A (en) * | 2019-01-24 | 2019-05-03 | 河南城建学院 | Antinoise interference type uniaxial loading sample cylinder and its application method |
-
2016
- 2016-12-06 CN CN201621326641.7U patent/CN206208842U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374742A (en) * | 2017-08-09 | 2019-02-22 | 中国石油化工股份有限公司 | Evaluation system for carbonate formation rock sound mechanical response characteristic |
| CN109163966A (en) * | 2018-10-26 | 2019-01-08 | 煤科集团沈阳研究院有限公司 | The experimental provision that a kind of measuring temperature and gas influence coal sample mechanical property |
| CN109708975A (en) * | 2019-01-24 | 2019-05-03 | 河南城建学院 | Antinoise interference type uniaxial loading sample cylinder and its application method |
| CN109708975B (en) * | 2019-01-24 | 2021-07-30 | 河南城建学院 | Anti-noise interference type single-shaft loading sample cylinder and using method thereof |
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