High-temperature and high-pressure coal-rock deformation detection system

Abstract

The invention discloses a high-temperature and high-pressure coal-rock deformation detection system. The detection system comprises a coal-rock deformation test device and a gas collection and detection system. The test device comprises an upper axial pressure loading unit and a lower axial pressure loading unit which are capable of generating axial pressure on a coal-rock sample, and further comprises a confining pressure end cover, a confining pressure piston and a confining pressure head which are capable of generating confining pressure on the coal-rock sample; by accurately setting the axial pressure and the confining pressure and using a temperature meter to control temperature regulation of the coal-rock sample, accurate simulation of the coal-rock deformation stress-strain environment is achieved. The gas collection and detection system can collect mixed gas generated by the coal-rock sample during a deformation test in real time and conduct on-line analysis and detection; besides, gas with set pressure can be injected through a gas cylinder to simulate in-situ pore fluid pressure, and thus geological conditions are simulated more realistically. The test and detection system can obtain more complete coal-rock samples and is high in test precision, reasonable in structure, easy to disassemble and high in safety coefficient.

Description

technical field [0001] The invention relates to the field of coal rock deformation test equipment, in particular to a coal rock high temperature and high pressure deformation detection system. Background technique [0002] The special site conditions and structural background determine that most coalfields in my country have experienced the superposition and transformation of multi-stage tectonic movements, resulting in the common development of different deformation properties and different types of tectonic coal. With the continuous deepening of coalbed methane and mine gas geological research, structural coal, especially ductile deformation structural coal, has been highly valued. The development area of ​​ductile deformation structural coal is not conducive to the exploration and development of coalbed methane, and is the most dangerous place for mine gas outburst. zone. However, the formation mechanism of ductile deformed tectonic coal and its influencing factors are s...

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Problems solved by technology

[0003] In the prior art, the Chinese invention patent with the publication number CN103884604 discloses a multi-functional high-temperature and high-pressure triaxial coal-rock test device and method. First, the structure of the device is unreasonable. It is easy to destroy it in the process, and it is impossible to obtain a complete sample structure, which is not conducive to the analysis and research of the sample after the test; moreover, the loading method of the device is single, and it is difficult to realize the simultaneous loading of axial pressure and confining pressure. In addition, the safety factor of the device is not high; finally, the gas collection bag used in the device can only perform segmented detection, and cannot realize real-time collection and online detection

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