Prediction of surrounding rock permeability in tunnel is the base of estimating the water gushing yield for deep lying tunnel.
围岩渗透性预测是深埋隧道涌水量评估的重要基础。
To emphasize expatiating on how the method of grey systems analysis works in the estimation of water-gushing amount of the tunnel, then compare the result with two common methods.
论述了隧道涌水预测的基本原理与方法，并重点结合岩溶地区特殊的地质条件对有关方法进行了阐述。
Water gushing is common disaster in tunnel construction, and may be induced by many causes.
涌水是隧道施工中常见的灾害现象，它的形成原因是多方面的。
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