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7353工作面材料道为窄煤柱沿空掘巷,通过利用“十”字形观测法和顶板离层监测仪对巷道进行观测与分析,掌握了小煤柱锚杆支护巷道顶板与围岩的活动情况,验证了小煤柱留设尺寸的合理性及小煤柱巷道采用锚杆支护的可靠性。
7353 face material roadway for the narrow pillar along the roadway driving through the use of “ten ” zigzag observation method and the roof separation monitor for observation and analysis of the roadway to grasp the roof of small coal pillar bolt support roadway and Wai Rock activity, verified the rationality of leaving the size of small coal pillars and the reliability of bolting with small coal pillar roadway.