摘要
某隧道口坡体岩石坍塌,造成多人伤亡,国道交通中断。通过现场调查和分析,认为:几乎平行于隧道口高陡边坡面的原生开放性节理面,已使坍塌岩体处于不稳定状态,是发生坍塌事故的内因;而事故前临近的隧道小导洞掘进爆破及其违规作业加剧了节理面进一步张开和延伸,是岩石坍塌的诱因。
A rock collapse in front of tunnel caused many casualties and traffic interrupted of the national highway. Through investigations and analyses of the accident site, the natural open joint almost paralleling to the high and steep slope, which caused the rock in front of tunnel in unstable,was the internal cause of rock collapse. Meanwhile, the tunnel blasting of small beading tunnel before accident happening and its incorrect operations, opened and extended which the joint surface, was the inducement of rock collapse.
出处
《爆破》
CSCD
2008年第4期100-102,共3页
Blasting
关键词
岩石坍塌
岩石节理
掘进爆破
事故分析
rock collapse
rock joints
tunnel blasting
accident analysis
