Coal rock mechanical parameter detector and method for measuring mechanical parameters of coal rock

A technology of mechanical parameters and detectors, applied in the direction of analyzing solids using sound waves/ultrasonic waves/infrasonic waves, can solve the problem of inability to accurately reflect the mechanical properties of dynamic changing conditions of coal and rock, difficulty in showing the complexity of crack changes in coal and rock specimens, and inability to Accurately reflect the dynamic changes of cracks in coal and rock specimens, and achieve accurate detection results

Inactive Publication Date: 2015-04-29
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

[0002] At present, the analysis methods of coal and rock mechanical properties at home and abroad are all under laboratory conditions, and the standard coal and rock specimens are subjected to tensile, compression, torsion and other failure tests. The research results are difficult to show the complexity of the internal crack changes property, and cannot accurately reflect the mechanical...
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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.

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  • Coal rock mechanical parameter detector and method for measuring mechanical parameters of coal rock

Examples

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Example Embodiment

[0014] The coal and rock mechanics parameter detector of the present invention has specific implementations such as figure 1 As shown, it includes a single-axis press and an ultrasonic detector. The single-axis press includes a jack with a pressure reading gauge, an upper working platform, a lower working platform, a movable platform and a fixed screw. The ultrasonic detector includes an emitter. , Receiving pole and signal processing unit.
[0015] The method for determining the mechanical parameters of coal and rock by the above-mentioned coal and rock mechanical parameter detector of the present invention is specifically implemented as follows:
[0016] First, the coal and rock specimens are placed on the movable platform of the uniaxial press, and the emitter and receiver of the ultrasonic detector are fixed on both sides of the coal and rock specimens. The emitter of the ultrasonic detector sends out ultrasonic signals to pass the coal and rock test. The receiving pole of the ultrasonic detector receives the ultrasonic signal passing through the coal and rock specimen, and inputs the ultrasonic signal to the signal processing unit of the ultrasonic detector, and the signal processing unit displays the corresponding ultrasonic parameters according to the ultrasonic signal ;
[0017] Operate the single-axis press with a jack with a pressure reading gauge to raise the movable platform, and use the working platform and movable platform on the single-axis press to generate uniaxial pressure on the coal and rock specimens. At this time, the signal processing unit of the ultrasonic detector will display different ultrasonic waves. parameter;
[0018] Afterwards, the mechanical parameters of the coal and rock specimens are analyzed according to the changes in the ultrasonic parameters displayed by the signal processing unit of the ultrasonic detector.
[0019] When testing coal and rock specimens, ultrasonic testing can be carried out under different uniaxial pressure conditions. According to the ultrasonic detector showing different ultrasonic parameters, the mechanical parameters of coal and rock can be analyzed.
[0020] In specific embodiments, the ultrasonic detector can be a ZBL-U510 non-metal detector or other types of ultrasonic detectors.
[0021] The detection instrument capable of measuring coal and rock mechanics parameters has simple structure, convenient carrying, accurate and reliable detection data, and can dynamically detect changes in coal and rock mechanics parameters, and then analyze the crack evolution law of coal and rock specimens under uniaxial pressure.
[0022] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. , Should be covered within the protection scope of the present invention.
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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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