Mechanics Parameter Detector for Coal and Rock and Method for Measuring Mechanics Parameters of Coal and Rock

Abstract

The invention discloses a coal-rock mechanical parameter tester and a method for measuring coal-rock mechanical parameters, which include a single-axis press and an ultrasonic detector. First, the emitter and receiver of the ultrasonic detector are respectively fixed on both sides of the coal-rock specimen. After the ultrasonic signal passes through the coal-rock specimen, the signal processing unit of the ultrasonic detector will display the received ultrasonic parameters. The uniaxial press can produce different uniaxial pressures on the coal and rock specimens. When the ultrasonic wave passes through the coal and rock specimens subjected to uniaxial pressure, the signal processing unit of the ultrasonic detector will display different ultrasonic parameters. The mechanical parameters of coal and rock specimens can be obtained by analyzing the changes of ultrasonic parameters. The detector capable of measuring mechanical parameters of coal and rock has a simple structure, is convenient to carry, and has accurate and reliable detection data, and can dynamically detect changes in mechanical parameters of coal and rock, and further analyze the evolution law of cracks of coal and rock test pieces under uniaxial pressure.

Description

Technical field [0001] The invention relates to a technology for dynamically detecting coal and rock mechanical parameters by using ultrasonic waves, in particular to a coal and rock mechanical parameter detector and a method for measuring coal and rock mechanical parameters. Background technique [0002] At present, domestic and foreign coal and rock mechanical properties analysis methods are all under laboratory conditions to conduct tensile, compression, torsion and other failure tests on standard coal and rock specimens. The research results are difficult to show the complexity of the internal fissure changes of coal and rock specimens. It can not accurately reflect the mechanical properties of coal and rock under the conditions of dynamic changes. Although some experimental studies use ultrasonic to analyze the mechanical properties of coal and rock specimens, the direction of ultrasonic emission and the direction of force on the coal and rock specimens are usually the same,...

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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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