煤的突然压出机理研究

Research on Coal Sudden Extrusion Mechanism

煤的突然压出是一种地应力主导的煤与瓦斯动力现象,严重威胁着矿井安全生产,但是有关它的发生机理研究却很少。因此,以第1类压出为研究对象,在受力分析基础上,从理论上推导出了煤体压缩变形、位移与能量计算公式。研究结果显示,在应力极限区内,第1类压出发生时,煤体压缩量和位移随距煤壁的距离基本呈指数规律增长;在产生相同最大位移的条件下,发生位置越深,需要的能量越大,并且,也基本呈指数关系。

Coal sudden extrusion is a dynamical phenomenon about coal and gas caused by stress, which seriously threatens to the mine safety production due to very little research about its mechanism. The article, taking the first kind of extrusion as research object, on the basis of force analysis, educed the computation formulas of coal compress distortion, displacement and energy in theory. The re- search result shows that coal compress distortion and displacement increase with the distance to coal wall by exponential law when the first kind of extrusion takes place within the zone of stress limit ; in the condition of producing the same maximal displacement, and the deeper of happening location, the bigger of needful energy, and it is also the exponent relation.