瓦斯压力对煤样冲击倾向性的影响试验研究.

In terms of compound dynamic disaster in depth high-gas mine, in order to investigate the influence rule of coal and rock mechanical behavior by gas pressure, a set of experimental equipment for testing coal samples deformation and failure under uniaxial compression condition of coal and rock containing gas was developed with the RMT- 150C rock mechanics test system as a carrier, and then, constituted a gassy coal uniaxial compression experiment system with XL2101C SPC static resistance strain gauge. Outburst-proneness index determination tests were conducted on this system. The results showed that ① the volume-expanding phenomena of coal samples occur with the increase of gas pressure during the process of gas filling and adsorption. The volume change of coal samples is divided into two stages: the accelerated deformation stage and the gentle stage;② with the increase of gas pressure from 0 MPa to 2 MPa, the dynamic failure time of coal samples decreases by 547. 64%,the elastic energy index, impacting energy index and compressive strength of coal samples decrease 85. 29%,96. 24% and 58. 78% respectively. The comprehendsive evaluation result is a decrease in impact tendency. [ABSTRACT FROM AUTHOR]