Multi-field coupling monitoring and testing device for coal rock

Abstract

A coal-rock multi-field coupling monitoring test device belongs to the technical field of mining. The coal-rock multi-field coupling monitoring test device includes a base, a test chamber, an axial pressure application system, a confining pressure application system, a pore flow pressure simulation system, a temperature application system, a charge collection system, an acoustic emission signal collection system, and a strain collection system. System and data acquisition and analysis device; the test chamber includes a steel pressure chamber and a sealing flange, a transmission rod is installed in the middle of the sealing flange, and an upper The pressure head and the lower pressure head; the pore flow pressure simulation system includes the first pore flow pressure port set on the upper pressure head, the second pore flow pressure port set on the lower pressure head, the first flow pressure port set on the sealing flange The pressure transmission hole and the second flow pressure transmission hole, flow meter and flow pressure application system; the temperature application system includes an electric control heating belt wound on the surface of the thermoplastic sleeve; the axial pressure application system includes an axial hydraulic cylinder and a pressure sensor.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to a coal-rock multi-field coupling monitoring test device. Background technique [0002] The long-term mechanical behavior of coal and rock is an important research direction in the field of rock mechanics, and it is also a hot issue in engineering. In recent years, the coal industry has officially entered the stage of deep mining. The deep coal rock mass is not only affected by high geostress, but also coupled with high osmotic pressure and high geothermal temperature. Therefore, mining engineering activities have changed the stability of the original rock stress. Therefore, it is extremely important to study the long-term mechanical behavior of coal and rock mass under the coupling effect of high ground stress-high seepage pressure-high ground temperature, which is conducive to a more scientific understanding of deep high stress, The catastrophe breeding mechanism of coal and roc...

AI Technical Summary

Problems solved by technology

[0003] At present, there are relatively few test devices for the triaxial mechanical behavior of coal and rock mass, especially the test devices that can carry out long-term strength tests of coal mass with the two influencing factors of pore flow pressure and temperature at the same time. The mechanism of rock burst inoculation requires not only theoretical ...

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