Pressure chamber for gas seepage test of coal rock samples

Abstract

The invention discloses a pressure chamber for a coal rock sample gas seepage test. The pressure chamber comprises a round steel cylinder, an annular pressure transmission sleeve, T-shaped end sockets, a PEEK sleeve, a conical steel sleeve, a right piston sleeve, a right first pressing sleeve, a right second pressing sleeve, a left first pressing sleeve and a left second pressing sleeve. A cylindrical coal rock sample cavity is formed between the annular pressure transmission sleeve and the two T-shaped end sockets; and an annular pressure applying cavity is formed between the annular pressuretransmission sleeve and the round steel cylinder. Two annular high-pressure liquid connectors are arranged on the side wall of the round steel cylinder; two axial high-pressure liquid connectors arearranged on the side wall of the right second pressing sleeve; and each of the two T-shaped end sockets is provided with a seepage high-pressure gas and resistivity tester PEEK insulation connector sharing connector. Therefore, the gas seepage conditions of the coal rock sample under underground real conditions of different pressures, different temperatures, underground waves and the like can be simulated truly, so that the test result has the higher practical guiding significance and the reliable guarantee is provided for safe mining of coal rock strata.

Description

technical field [0001] The invention belongs to the technical field of gas seepage test equipment for coal and rock samples, and in particular relates to a pressure chamber structure for performing gas seepage tests on coal and rock samples. Background technique [0002] Gas percolation refers to the flow of gas in porous media. The fundamental difference between gas percolation and liquid percolation is that gas has greater compressibility, and in the percolation process, the volume changes with temperature and pressure. At present, in the laboratory, the test piece box is commonly used to simulate the seepage test of various gases in the coal rock sample (collectively referred to as "coal sample" and "rock sample"), but the test conditions of the existing test piece box are still relatively low. Limited, it is impossible to truly simulate the real underground conditions of coal and rock samples under the influence of factors such as different pressures, different temperat...

AI Technical Summary

Problems solved by technology

At present, in the laboratory, the test piece box is commonly used to simulate the seepage test of various gases in the coal rock sample (collectively referred to as "coal sample" and "rock sample"), but the test conditions of the existing test piece box are still relatively low. Limited, it is impossible to truly simulate the real underground conditions of coal and rock samples under the influence of factors such as different pressures, different temperatures, and underground waves

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