另据报道，去年地铁建设过程中的一起隧道坍塌事故造成六名工人死亡。
Six workers died last year when a tunnel collapsed during construction.
在中等电流密度下，隧道穿透过程是重要的。
Tunneling process is important in the low to moderate current density range.
用二次隧道效应理论解释了这种退化过程。
The degradation process is explained by using the theory of secondary tunnel effect.
隧道围岩局部块体稳定性分析是隧道设计和施工过程中必不可少的环节。
Assessment on stability of partial rock-block mass is essential during tunnel's design and construction.
隧道建设过程中，产生强烈变形和严重破坏。
During construction, intense deformation and serious failure happened.
隧道建设过程中，产生强烈变形和严重破坏。
During construction, intense deformation and serious failure happened.
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