摘要
基于回采巷道长、岩体稳固性差、变形坍塌严重、维护费用高的特点,通过调大进路间距,减弱应力相互影响,对巷道起到一定的维护作用。理论计算大浞河进路之间不产生应力叠加间距为13.4m;数值模拟进路间距不同情况下的应力相互作用,以单条巷道围岩应力为基准,对比分析出最佳进路间距为13m。最后根据对比分析长炮孔施工困难状况,确定回采巷道间距为13m。
Long drawing roadway and poor rock mass stability cause serious caving and high maintenance expenses.Expanding distance of lanes and reducing interference of stress can maintain the lanes to a certain extent.Theoretic calculation distance without superposition stress between lanes is 13.4m.As lane distance is different,under the condition of numerical simulation,the stress interaction of the lanes is different.In the terms of wall rock stress of a single lane,the optimum distance of lane is 13m through comparative analysis. Under the construction condition of long blast hole, the distance of drawing road- way is determined to be 13m.
出处
《现代矿业》
CAS
2009年第11期20-22,共3页
Modern Mining
关键词
无底柱分段崩落法
进路间距
矿山压力
数值模拟
Pillarless sublevel caving method
Distance of lane
Mine pressure
Numerical simulation
