【摘要】 分析临涣煤矿区竖井井壁破坏的原因，主要是由负摩擦力产生的纵向荷载引起的。计算出几个竖井的最大负摩擦力，可确定出该矿区竖井在极限状态时的负摩擦力。更多还原

【Abstract】 According to the analysis for failure reasons of vertical shaft wall in Linhuan Coal Mine,its main reason is longitudinal load produced by negative frictional force. From calculating for the maximum negative frictional force of several vertical shaft walls,the limited negative frictional force of vertical shaft wall in this mining area can be determined.更多还原