CN104569150A - Coal rock mechanical parameter detector and method for measuring mechanical parameters of coal rock - Google Patents
Coal rock mechanical parameter detector and method for measuring mechanical parameters of coal rock Download PDFInfo
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- CN104569150A CN104569150A CN201310466777.2A CN201310466777A CN104569150A CN 104569150 A CN104569150 A CN 104569150A CN 201310466777 A CN201310466777 A CN 201310466777A CN 104569150 A CN104569150 A CN 104569150A
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- coal rock
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Abstract
The invention discloses a coal rock mechanical parameter tester and a method for measuring mechanical parameters of coal rock. The coal rock mechanical parameter tester comprises a uniaxial pressure machine and an ultrasonic detector. According to the method, an emitter electrode and a receiver electrode of the ultrasonic detector are respectively fixed to two sides of a coal rock test piece; and after an ultrasonic signal passes through the coal rock test piece, an ultrasonic detector signal processing unit will display a received ultrasound parameter. The uniaxial pressure machine can produce different uniaxial pressure on the coal rock test piece. When ultrasonic wave passes through the coal rock test piece which is under the action of uniaxial pressure, the ultrasonic detector signal processing unit will display different ultrasound parameters. By analyzing changes of the ultrasound parameters, mechanical parameters of the coal rock test piece can be obtained. The detector capable of measuring mechanical parameters of coal rock has a simple structure, is convenient to carry, has accurate and reliable test data and can dynamically detect mechanical parameter changes of coal rock so as to further analyze fracture evolution rules of the coal rock test piece under the action of uniaxial pressure.
Description
Technical field
The present invention relates to a kind of technology utilizing ultrasound wave detection of dynamic coal petrography mechanics parameter, particularly relate to a kind of method of coal petrography mechanics parameter detector and mensuration coal petrography mechanics parameter.
Background technology
At present, domestic and international mechanical property of coal seam analysis means is all in laboratory conditions, standard coal rock specimen is stretched, compresses, the failure test such as torsion, result of study is difficult to the complicacy showing the change of coal rock specimen internal crack, more cannot reflect the mechanical property under coal petrography dynamic changing condition exactly.Although some experimental study utilizes ultrasonic analysis coal rock specimen mechanical property, because ultrasound wave transmit direction is normally consistent with coal rock specimen Impact direction, the dynamic change in coal rock specimen crack therefore accurately cannot be reflected.
Summary of the invention
The object of this invention is to provide a kind of energy accurately, the detector of the judgement coal petrography mechanics parameter of science and measure the method for coal petrography mechanics parameter.
The object of the invention is to be achieved through the following technical solutions:
Coal petrography mechanics parameter detector of the present invention, comprise uni-axial press and supersonic reflectoscope, described uni-axial press comprises the lifting jack of band pressure read table, upper workbench, lower workbench, movable platform and standing screw, and described supersonic reflectoscope comprises emitter, receiving pole and signal processing unit.
Coal petrography mechanics parameter detector of the present invention, on described uni-axial press, workbench and lower workbench are fixed by standing screw, described uni-axial press movable platform is positioned in the middle of workbench and lower workbench, and the lifting jack of described uni-axial press band pressure read table is placed in the middle of movable platform and lower workbench.
Coal petrography mechanics parameter detector of the present invention, described supersonic reflectoscope emitter and receiving pole are positioned in described uni-axial press movable platform, described supersonic reflectoscope emitter sends ultrasonic signal, described supersonic reflectoscope receiving pole receives the ultrasonic signal sent by emitter, and this ultrasonic signal is input to described supersonic reflectoscope signal processing unit, described signal processing unit demonstrates corresponding ultrasonic parameters according to ultrasonic signal.
Above-mentioned coal petrography mechanics parameter detector of the present invention measures the method for coal petrography mechanics parameter, comprising:
First, coal rock specimen is placed in uni-axial press movable platform, supersonic reflectoscope emitter and receiving pole are fixed on the both sides of coal rock specimen, described supersonic reflectoscope emitter sends ultrasonic signal and passes through coal rock specimen, described supersonic reflectoscope receiving pole receives the ultrasonic signal by coal rock specimen, and this ultrasonic signal is input to described supersonic reflectoscope signal processing unit, described signal processing unit demonstrates corresponding ultrasonic parameters according to ultrasonic signal;
The lifting jack of operation uni-axial press band pressure read table makes movable platform rise, utilize workbench and movable platform on uni-axial press to produce uniaxial tension to coal rock specimen, now supersonic reflectoscope signal processing unit can demonstrate different ultrasonic parameters;
Afterwards, according to supersonic reflectoscope signal processing unit, the situation of change of ultrasonic parameters analyzes the mechanics parameter of described coal rock specimen.
As seen from the above technical solution provided by the invention, the method of coal petrography mechanics parameter detector of the present invention and mensuration coal petrography mechanics parameter thereof, because supersonic reflectoscope can carry out Non-Destructive Testing to coal rock specimen, the fundamental mechanics parameter of coal rock specimen first can be judged; By uni-axial press, coal rock specimen is applied to the uniaxial tension of different size, supersonic reflectoscope can be utilized to reflect to be changed by the ultrasonic signal of coal rock specimen, thus symbolize pressurized and the internal crack situation of change of coal rock specimen, realize the detection of dynamic of coal petrography mechanics parameter.Because uniaxial tension action direction is perpendicular to ultrasonic propagation direction, the Crack change of coal rock specimen inside can exactly capture by ultrasound wave, so the testing result of coal petrography mechanics parameter is more accurate.
Accompanying drawing explanation
Fig. 1 is the theory diagram of coal petrography mechanics parameter detector of the present invention.
Embodiment
Coal petrography mechanics parameter detector of the present invention, its embodiment as shown in Figure 1, comprise uni-axial press and supersonic reflectoscope, described uni-axial press comprises the lifting jack of band pressure read table, upper workbench, lower workbench, movable platform and standing screw, and described supersonic reflectoscope comprises emitter, receiving pole and signal processing unit.
Above-mentioned coal petrography mechanics parameter detector of the present invention measures the method for coal petrography mechanics parameter, and its embodiment is:
First, coal rock specimen is placed in uni-axial press movable platform, supersonic reflectoscope emitter and receiving pole are fixed on the both sides of coal rock specimen, described supersonic reflectoscope emitter sends ultrasonic signal and passes through coal rock specimen, described supersonic reflectoscope receiving pole receives the ultrasonic signal by coal rock specimen, and this ultrasonic signal is input to described supersonic reflectoscope signal processing unit, described signal processing unit demonstrates corresponding ultrasonic parameters according to ultrasonic signal;
The lifting jack of operation uni-axial press band pressure read table makes movable platform rise, utilize workbench and movable platform on uni-axial press to produce uniaxial tension to coal rock specimen, now supersonic reflectoscope signal processing unit can demonstrate different ultrasonic parameters;
Afterwards, according to supersonic reflectoscope signal processing unit, the situation of change of ultrasonic parameters analyzes the mechanics parameter of described coal rock specimen.
When detecting coal rock specimen, ultrasound examination can be carried out under the action condition of different uniaxial tension, demonstrating different ultrasonic parameters according to supersonic reflectoscope, thus analyze the mechanics parameter of coal petrography.
In specific embodiment, supersonic reflectoscope can select the supersonic reflectoscope of the nonmetal detector of ZBL-U510 or other model.
Of the present invention to measure coal petrography mechanics parameter detector structure simple, easy to carry, detects data accurately and reliably, dynamically can detect the change of coal petrography mechanics parameter, and then analyze the crack Evolution of coal rock specimen under uniaxial tension effect.
The above; but be only the specific embodiment of the present invention protection scope of the present invention to be not limited thereto; any be familiar with those skilled in the art invention the present invention disclose technical scope in; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
Claims (6)
1. a coal petrography mechanics parameter detector, it is characterized in that, comprise uni-axial press and supersonic reflectoscope, described uni-axial press comprises the lifting jack of band pressure read table, upper workbench, lower workbench, movable platform and standing screw, and described supersonic reflectoscope comprises emitter, receiving pole and signal processing unit.
2. coal petrography mechanics parameter detector according to claim 1, it is characterized in that, on described uni-axial press, workbench and lower workbench are fixed by standing screw, described uni-axial press movable platform is positioned in the middle of workbench and lower workbench, and the lifting jack of described uni-axial press band pressure read table is placed in the middle of movable platform and lower workbench.
3. the coal petrography mechanics parameter detector according to claim 1,2, it is characterized in that, described supersonic reflectoscope emitter and receiving pole are positioned in described uni-axial press movable platform, described supersonic reflectoscope emitter sends ultrasonic signal, described supersonic reflectoscope receiving pole receives the ultrasonic signal sent by emitter, and this ultrasonic signal is input to described supersonic reflectoscope signal processing unit, described signal processing unit demonstrates corresponding ultrasonic parameters according to ultrasonic signal.
4. the coal petrography mechanics parameter detector described in claim 1,2 and 3 measures a method for coal petrography mechanics parameter, it is characterized in that, comprising:
First, coal rock specimen is placed in uni-axial press movable platform, supersonic reflectoscope emitter and receiving pole are fixed on the both sides of coal rock specimen, described supersonic reflectoscope emitter sends ultrasonic signal and passes through coal rock specimen, described supersonic reflectoscope receiving pole receives the ultrasonic signal by coal rock specimen, and this ultrasonic signal is input to described supersonic reflectoscope signal processing unit, described signal processing unit demonstrates corresponding ultrasonic parameters according to ultrasonic signal;
The lifting jack of operation uni-axial press band pressure read table makes movable platform rise, utilize workbench and movable platform on uni-axial press to produce uniaxial tension to coal rock specimen, now supersonic reflectoscope signal processing unit can demonstrate different ultrasonic parameters;
Afterwards, according to supersonic reflectoscope signal processing unit, the situation of change of ultrasonic parameters analyzes the mechanics parameter of described coal rock specimen.
5. coal petrography mechanics parameter detector according to claim 4 measures the method for coal petrography mechanics parameter, it is characterized in that, described coal rock specimen can carry out ultrasound examination under different uniaxial tension effect, and the uniaxial tension direction that described coal rock specimen is subject to is vertical with ultrasonic propagation direction.
6. the coal petrography mechanics parameter detector according to claim 4 and 5 measures the method for coal petrography mechanics parameter, it is characterized in that, the mechanics parameter of the ultrasonic parameters mutation analysis coal rock specimen shown by supersonic reflectoscope signal processing unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310466777.2A CN104569150B (en) | 2013-10-09 | 2013-10-09 | Coal petrography mechanics parameter detector and its method for determining coal petrography mechanics parameter |
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| CN201310466777.2A CN104569150B (en) | 2013-10-09 | 2013-10-09 | Coal petrography mechanics parameter detector and its method for determining coal petrography mechanics parameter |
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| CN104569150A true CN104569150A (en) | 2015-04-29 |
| CN104569150B CN104569150B (en) | 2017-08-11 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404913A (en) * | 2016-10-31 | 2017-02-15 | 石家庄铁道大学 | Method for detecting sulfate corrosion of tunnel linings |
| CN111044364A (en) * | 2019-12-18 | 2020-04-21 | 辽宁工程技术大学 | Sound wave feedback coal rock structure damage stability detection experimental device |
| CN114543456A (en) * | 2022-01-20 | 2022-05-27 | 中国矿业大学 | Nondestructive drying device and drying method based on coal rock mass ultrasonic monitoring |
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| CN201205566Y (en) * | 2008-05-30 | 2009-03-11 | 中国十五冶金建设有限公司 | Hydraulic pressing machine for jack |
| CN103267678A (en) * | 2013-04-28 | 2013-08-28 | 北京大学 | Synchronous measurement method and apparatus for dynamic and static rock mechanical parameters |
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2013
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201205566Y (en) * | 2008-05-30 | 2009-03-11 | 中国十五冶金建设有限公司 | Hydraulic pressing machine for jack |
| CN103267678A (en) * | 2013-04-28 | 2013-08-28 | 北京大学 | Synchronous measurement method and apparatus for dynamic and static rock mechanical parameters |
Non-Patent Citations (3)
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| 吴丽琴: "单轴受压混凝土损伤的细观试验研究", 《中国优秀博硕士学位论文全文数据库 (硕士) 工程科技Ⅱ辑》 * |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404913A (en) * | 2016-10-31 | 2017-02-15 | 石家庄铁道大学 | Method for detecting sulfate corrosion of tunnel linings |
| CN106404913B (en) * | 2016-10-31 | 2019-03-05 | 石家庄铁道大学 | Tunnel-liner sulphate corrosion detection method |
| CN111044364A (en) * | 2019-12-18 | 2020-04-21 | 辽宁工程技术大学 | Sound wave feedback coal rock structure damage stability detection experimental device |
| CN114543456A (en) * | 2022-01-20 | 2022-05-27 | 中国矿业大学 | Nondestructive drying device and drying method based on coal rock mass ultrasonic monitoring |
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