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针对深部高瓦斯煤层复合动力灾害的特点,以阜新五龙矿高瓦斯煤样为研究对象,通过“煤岩渗透试验台-三轴渗透仪”试验装置,对比分析孔隙压力、峰值强度、弹性模量与瓦斯含量的相互关系,研究瓦斯对煤力学性质的影响规律。结果表明:浅部低瓦斯煤层瓦斯含量与孔隙压力之间符合Langmuir方程,深部高瓦斯煤层瓦斯含量与孔隙压力之间符合幂函数关系;煤体中的瓦斯的游离与吸附两种状态在一定温度和瓦斯压力下保持动态平衡,随瓦斯含量的增加,煤体中游离瓦斯量呈线性增加,煤体峰值强度随之降低;围压很低时,弹性模量与瓦斯压力之间近似呈线性关系,围压较大时,呈非线性关系,弹性模量随瓦斯含量增加而降低,瓦斯压力越大,弹性模量降低越多。
Aiming at the characteristics of composite dynamic disasters in deep gassy coal seams, taking the high-gas coal samples of Wuxing mine in Fuxin as the research object, the pore pressure, peak strength, Elastic modulus and gas content of the relationship between the study of coal on the nature of the laws of the impact of coal. The results show that the Langmuir equation between the gas content and the pore pressure of the low-gas coal seam lies in the shallow part, and the gas content and pore pressure in the deep-high gas coal seam coincide with the power function. The free gas and the adsorbed gas in the coal body are at a certain temperature And gas pressure to maintain a dynamic equilibrium with the increase of gas content, the amount of free gas in coal increased linearly, the peak intensity of coal decreases; low confining pressure, the elastic modulus and gas pressure is approximately linear relationship between When the confining pressure is larger, the nonlinear relationship exists. The elastic modulus decreases with the increase of gas content. The larger the gas pressure, the more the elastic modulus decreases.