Karst disaster is one of the familiar geology disasters in tunnel construction of mountain area.
我国是一个多山、多岩溶地貌国家，岩溶问题是山区隧道建设中的关键问题之一。
Taihangshan tunnel is currently the longest mountain railway tunnel in China.
太行山隧道是目前我国设计的最长山岭铁路隧道。
Taihangshan tunnel is currently the longest mountain railway tunnel in China.
太行山隧道是目前我国设计的最长山岭铁路隧道。
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