Located at the coddle and with an embedment up to 700m, the F9 fault is a regional trunk fracture. Being extremely complicated, it is the difficult point and the key to build the tunnel.

  • 处在隧道中部、埋深达700m的F9断层为区域性主干断裂,异常复杂,是隧道修建的难点和关键。

  • 互联网摘选 2026-07-02 11:41:56

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