【摘要】 将老顶和老底视为加载系统,分析了回采巷道煤柱和底板岩层的相互作用及稳定性,并提出了底板岩层产生滑移的条件。认为回采巷道底鼓一般不是底板岩层在垂直应力作用下向巷道内滑移所致。更多还原

【Abstract】 The system consisted of main roof and hard floor is considered as a load system; the interaction and stability of coal pillar and immediate bottom of extraction opening are analyzed. The condition that immediate bottom produces slump is proposed. It is put forward that the reason of floor heave of extraction opening isn抰 slump of immediate bottom but effect of horizontal stress.更多还原