The strata dynamic cracking characteristics of E1142 haulageway in fractured roof 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。
The strata dynamic cracking characteristics of E1142 haulageway in fractured roof 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。
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