黄永辉,荆蕊,张译尹,段强坤,曹永炜

• 1:昆明理工大学电力工程学院
• 2:四川省应急救援总队

摘要(Abstract)：

巷道孤石是地下工程中的重大安全隐患，针对爆破法处理孤石的效果及对围岩损伤的影响开展研究，采用光面爆破理论和近年来刚产生的S-ALE算法，依托云南某地下金属矿山巷道工程，构建等比例三维数值仿真模型，系统地分析研究了光面爆破技术处理巷道孤石时的围岩损伤随不同线装药密度和炮孔间距的变化规律。研究结果表明:孤石光面爆破围岩损伤度随爆心距增大呈“反S”型下降;围岩的最大损伤深度随线装药密度增加呈线性增大变化，随炮孔间距增大呈波动变化，且在炮孔间距为0.36 m和0.40 m时分别达到最大值和最小值;围岩损伤变化对线装药密度的敏感性远大于炮孔间距，在考虑爆破效果和炸药使用量的情况下，最优爆破参数为线装药密度0.30 kg/m(装药不耦合系数1.43)和炮孔间距0.40 m;由于孤石大临空面积的特性，与常规光面爆破相比其围岩最大损伤深度明显偏小，这与垂直洞轮廓线临空方向和沿洞轮廓线临空方向的塑性应变下降率基本一致。相关研究结果能够为实际工程提供技术指导。

关键词(KeyWords)： 线装药密度;炮孔间距;围岩损伤;数值模拟;S-ALE算法

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52164009、52574148)~~

作者(Author): 黄永辉,荆蕊,张译尹,段强坤,曹永炜

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