回坡底煤矿回采巷道支护优化选择

Selection of Gateway Support Optimization in Huipodi Colliery

为选定回坡底煤矿回采巷道的合理支护参数,拟采用数值模拟方法对不同支护方案进行分析比较,拟定3种支护方案进行优化,最终选择方案3为最优方案。模拟结果显示,方案3的巷道顶板下沉量仅为108 mm,两帮收敛量降至34 mm,且每米支护成本为987.10元;现场应用结果也与数值模拟结果相近,证明方案可行。

By comparison analysis of three support schemes through numerical simulation in gateway of Huipodi Colliery, the author determines the scheme 3 the optimal one, in which the subsidence of roadway roof is only 108 mm, the convergence of two sides decreases to 34 mm and the support cost per meter is RMB 987.10.