The fracture of shaft lining is a special type of engineering geologic disasters and is caused by interaction between mining and geological environment.

立井井壁破坏是一种特殊类型的工程地质灾害，是人类采矿活动和地质环境相互作用的结果。

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Numerical simulation was conducted using UDEC3.0 for the movement of overlaying strata and fracture development caused by the mining of upper protective layers of coal seams with close quarters.

本文利用UDEC3.0软件对近距离上保护层开采导致的覆岩移动及裂隙发育过程进行数值模拟。

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It is one of the important research projects in the field of controlling water-inrush from roof that the calculating method of water flowing fracture height caused by coal mining.

煤层开采所引发的上覆岩层导水断裂带高度的计算方法是矿井顶板水害防治中的重要研究课题之一。

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