In mining, if the hard roof is submitted to shear failure, the sidesteps might sink or even collapse. 摘要綜放面開(kāi)采過(guò)程中，堅硬頂板超前剪切破壞，會(huì )造成工作面臺階下沉，甚至工作面整體垮落。
With the increase of the depth of coal seams mined, rock bursts will easily occur in gateways with fully-mechanized sublevel caving mining. 摘要隨著(zhù)煤礦開(kāi)采深度增加，綜放開(kāi)采回采巷道易發(fā)生沖擊地壓危害。
