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

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 [0001] The invention relates to a technique for dynamically detecting coal-rock mechanical parameters by using ultrasonic waves, in particular to a coal-rock mechanical parameter detector and a method for measuring coal-rock mechanical parameters. Background technique [0002] At present, the analysis methods of coal and rock mechanical properties at home and abroad are all under laboratory conditions, such as tensile, compression, torsion and other failure tests on standard coal and rock specimens, and the research results are difficult to show the complexity of the internal crack changes property, and it cannot accurately reflect the mechanical properties of coal rock under the condition of dynamic change. Although some experimental studies use ultrasonic waves to analyze the mechanical properties of coal and rock specimens, the direction of ultrasonic emission and the force direction of coal and rock specimens are usually consistent, so the dynamic changes...

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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 properties of coal and rock under the condition of dynamic changes

Although some experimental studies use ultrasonic waves to analyze the mechanical properties of coal and rock specimens, the direction of ultrasonic emission and the force direction of coal and rock specimens are usually consistent, so the dynamic changes of cracks in coal and rock specimens cannot be accurately reflected.

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