【摘要】 爆炸过程 ,特别是高能量爆炸中产生的强大冲击波在击碎地质介质的同时 ,也往往危及到爆炸源附近一定范围内地下工程的稳定与安全。某直墙拱形地下巷道 (锚杆支护 )在一次较大当量的爆炸事件中发生了大范围的坍塌 ,破坏总长度超过 10 0 m,巷道完全报废。本论文运用有限元数值方法 ,模拟和计算了爆炸冲击波动荷载最大超压作用瞬间 ,巷道围岩的失稳范围、区域 ,围岩应力分布状况及位移特征。计算结果表明 ,当爆炸动荷载很大时 ,地下工程采取锚杆支护的效果不明显更多还原

【Abstract】 In explosion especially in high energy explosion, the explosion wave usually endangers the steady and safety of a tunnel near explosion site while it smashes rock. A straight-wall archic tunnel supported by anchor bars has been collapsion and destruction, and the destruction length of tunnel is over 100 meters in a explosion near the tunnel, which discarded the tunnel as useless. Using finite element method, in this paper, we simulate and calculate the failure range,the failure area,the stress distribution as well as the displacement status of tunnel rock at the moment the largest over pressure of impact wave is acting the tunnel rock. The result of finite element method shows that the effect that a tunnel is supported by anchor bars is not very apparent when explosion is very strong.更多还原