地应力对煤与瓦斯突出强度影响研究

Research on Influence of Ground Stress on Intensity of Coal and Gas Outburst

为研究地应力对煤与瓦斯突出强度影响,利用煤与瓦斯突出模拟试验装置,增加气体压力传感器和温度传感器。进行突出模拟试验,研究突出过程中的温度和瓦斯压力变化规律,探索煤与瓦斯突出机理。分别进行地应力为20、10、5 MPa的煤与瓦斯突出模拟试验。结果表明:随着地应力的减小,突出强度呈降低趋势,且地应力对突出强度的影响不是线性关系。煤炭颗粒会因地应力提高而密度增加,导致突出的煤量和突出距离减小。

In order to research on the influence of ground stress on intensity of coal and gas outburst, a set of testing apparatus for simulating coal and gas outburst is improved by adding gas and temperature sensors. Throughout simulating coal and gas outburst, the gas pressure and temperature during outburst are studied and the evolution rule of those parameters are analyzed,leading to investigation of mechanism of coal and gas outburst. The simulation work was conducted while the ground stress are 20,10,5 MPa separately. The results show that the outburst intensity appears to decline with the increase of ground stress. Besides,its influence on Moreover, the density of coal particle will grow with smaller coal outburst quantity and distance. outburst intensity is not simply linear related. the increase of ground stress,which results in a