The management of the roof, especially is the management of fracturedroof, is a key link in the face circulation operation.
综采工作面的顶板管理，特别是破碎顶板的管理，是工作面循环作业中的重要环节。
2
The strata dynamic cracking characteristics of E1142 haulageway in fracturedroof were investigated by optical peephole device.
利用钻孔光学窥视装置及系统，探测了E1142轨道平巷顶板岩层动态破裂特征，统计分析了裂隙分布规律。
3
A mechanical model for the fracturedroof and truss system is established based on stability theory for elastic system and analysis of stability of a dynamic system.