Fine observation mechanical test system containing gas coal rock

Abstract

The invention discloses a mesomechanics testing system of gas-containing coal rocks, which comprises a transparent sight glass that is fixed at an opening position of a testing cavity, a three-dimensional moving microscopic observing frame that is arranged outside the transparent sight glass, and a stereoscopic microscope and a CCD camera that are arranged on the three-dimensional moving microscopic observing frame; an inner end of a measuring conducting wire is connected with an acoustic emission sensor, and an outer end of the measuring conducting wire is connected with an acoustic emissionmagnifier and an acoustic emission card; the testing cavity is communicated with a gas pipe through a multi-purpose air vent, and the gas pipe is divided into two paths with one path connected with ahigh-pressure gas bottle and the other path connected with a vacuum pump; a cushion block, a limit pressure head and a loading head are arranged inside the testing cavity, a vertical surface of an L-shaped nick of the cushion block is over against the limit pressure head, and a transverse surface of the L-shaped nick of the cushion block is over against the loading head. The mesomechanics testingsystem of the gas-containing coal rocks provides more complete and reliable test methods for revealing the micro-structural damage law of the coal rocks under the gas action, further and deeper finding out the physical and mechanical properties of the gas-containing coal rocks, scientifically revealing the occurrence mechanism of the dynamic phenomenon of the coal rocks, and developing corresponding disaster prevention techniques.

Description

technical field [0001] The invention relates to a mesomechanics test system for gas-containing coal and rock, in particular to a mesomechanics test system for the whole process of outburst coal and rock rupture under different gas pressures and stress states, so as to use dynamic microscopic observation, acoustic Launch real-time monitoring and other experimental testing methods to conduct mesomechanical tests on the entire process of coal deformation and failure under the action of gas and under different stress conditions. Background technique [0002] The coal industry is a very important basic industry in my country. Whether it can develop healthily, stably and sustainably is a major issue related to national energy security. However, coal mine gas explosions and coal and gas outburst accidents occur frequently in various places, and coal mine gas disasters have seriously affected the healthy development of the coal industry. As shallow or simple geological conditions a...

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Problems solved by technology

Most of the existing test systems only use dynamic microscopic observation or acoustic emission monitoring, and the test methods are single

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