论文部分内容阅读
以具有突出倾向的原煤粉制备的型煤试件为研究对象,对其含瓦斯后煤样加、卸载过程中的力学性质和瓦斯对煤样力学性质的影响进行了试验研究.结果表明:含瓦斯煤加、卸载过程中产生的残余变形量较大,加载过程变形模量明显要小于卸载过程,加卸载曲线形状具有较强的关联性,不同含瓦斯煤样的卸载阶段变形模量变化较大;瓦斯对煤样力学性质的影响主要表现在三轴强度和变形模量、峰值应变方面;瓦斯对煤样三轴强度的影响可用指数函数表示,而对弹性模量的影响可用二次函数表示;瓦斯对煤样力学性质的影响随着围压的增加而减小.
The briquette samples prepared from the propensity coal powder were taken as the research object, and the effects of the coal samples containing the coal gas after unloading and the mechanical properties of the gas on the coal samples were studied.The results show that: The residual deformation produced during coal unloading is relatively large, and the deformation modulus during loading is obviously less than that during unloading. The shape of loading-unloading curves is strongly correlated with each other. Large; gas on the mechanical properties of coal samples mainly in the triaxial strength and deformation modulus, the peak strain; gas on coal triaxial strength can be expressed as an exponential function, and the elastic modulus can be used twice The function indicates that the influence of gas on the mechanical properties of coal samples decreases with the increase of confining pressure.