论文部分内容阅读
近水平煤层大断面开切眼导致围岩应力的分布规律发生变化。以寸草塔煤矿为研究背景,通过理论分析开切眼巷道顶底板及两帮的应力分布变化情况。结合现场工程实践与理论分析确定采用“锚杆+桁架锚索+锚网”的支护方案,保障井下工作人员在开切眼过程中的安全。
Near-horizontal seam open section of the large cross-section led to changes in the distribution of stress around the rock. Taking Xiaotha Coal Mine as a research background, the change of stress distribution in top and bottom slab and two gangues of open cut roadway was analyzed by theory. Combined with field engineering practice and theoretical analysis, it is determined that the support scheme of “anchor + truss anchor + anchor net” should be adopted so as to ensure the safety of downhole workers during cutting.