周磊,张祥,陈树林,王国豪,高德瑞,赵建彬,李晓婕

• 1:宏大爆破工程集团有限责任公司
• 2:中国矿业大学(北京)力学与土木工程学院
• 3:攀钢集团矿业有限公司

摘要(Abstract)：

掏槽爆破是地下岩石工程中单自由面爆破的关键环节，直接决定着巷道掘进速度。本研究聚焦于地下矿巷道掘进常用的直眼掏槽形式，首先通过现场掏槽爆破试验，借助三维激光扫描仪，从腔体深度(L)与截面面积(S)的关系角度定量表征了爆后腔体特征，发现存在底部空间狭小、破碎岩石堆积等问题。为提高掏槽爆破效果，提出在空孔底部装药的优化方法。进而，基于光滑粒子流体动力学-有限元法(SPH-FEM),对该方法的可靠性进行了数值模拟研究。结果表明：采用空孔底部装药后，掏槽区中轴线的损伤区域形状由W形转变为U形，损伤区域面积显著增大；岩石碎块(粒子)的总体抛掷数量增多，且炮孔内部不同位置碎块的抛掷距离明显增大。

关键词(KeyWords)： 掏槽爆破;直眼掏槽;三维激光;SPH-FEM;空孔底部装药

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 周磊,张祥,陈树林,王国豪,高德瑞,赵建彬,李晓婕

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