浅谈倒梯形切割天井在切割拉槽工艺中预防悬顶的应用

Introduction of the Application of Inverted Trapezoid Incise Courtyard in the Cutting Process to Prevent Roof Hanging

针对镜铁山矿无底柱分段崩落法采场崩落时经常出现的悬顶现象进行分析,提出了采用倒梯形切割天井方法以预防悬顶。

According to the analysis of the roof hanging phenomenon of sublevel cavingmethod, the paper proposes the method of inverted trapezoid incise courtyard to prevent roofhanging.