Lossless drying device and drying method based on coal rock mass ultrasonic monitoring

Abstract

The invention discloses a lossless drying device and method based on coal rock mass ultrasonic monitoring, and belongs to the field of rock mechanics tests. The lossless drying device comprises a drying device thermal insulation sealing box, a drying device temperature control module, a monitoring display screen, an ultrasonic monitoring control module, an air drainage valve and a heating module; the heating module and the air drainage valve are respectively connected with the drying device temperature control module; nondestructive and complete drying of the coal rock sample can be realized, so that the accuracy and scientificity of mechanical experiments and physical and mechanical parameter tests of the coal rock sample in a laboratory are improved; on one hand, the coal rock sample is subjected to initial wave velocity testing, and an optimal scheme is selected for initial drying of the coal rock sample after a proper drying temperature and a proper drying mode are selected; and on the other hand, by testing the real-time wave velocity and quality of the coal rock sample in the drying process, dynamic drying of the sample can be achieved, and once the ultrasonic monitoring signal fluctuates abnormally greatly, lossless drying can be achieved by reducing the drying temperature or changing the drying mode.

Description

technical field [0001] The invention belongs to the field of rock mechanics test, and relates to a non-destructive drying device and a drying method based on ultrasonic monitoring of coal and rock mass. Background technique [0002] The coal and rock samples need to be dried before various rock mechanics experiments and physical and mechanical parameter tests. The current relevant national standards also recommend drying temperatures and methods. Due to the complexity of materials such as anisotropy, drying the sample at a single temperature will often cause certain mechanical damage to its internal structure. At the same time, the contradictory requirements of drying damage and complete drying also affect the accuracy of mechanical tests and physical and mechanical parameter tests. and scientific. SUMMARY OF THE INVENTION [0003] The technical problem to be solved by the present invention is aimed at the deficiencies of the above-mentioned prior art, and provides a non-...

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Problems solved by technology

[0002] Coal and rock samples need to be dried before various rock mechanics experiments and physical and mechanical parameter tests. The current relevant national standards also recommend drying temperatures and methods. Due to the complexity of materials such as anisotropy, drying the sample at a single temperature will often cause certain mechanical damage to its internal structure. At the same time, the contradictory requirements of drying damage and complete drying also affect the accuracy of mechanical tests and physical and mechanical parameter tests. and scientific

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