超前钻探预测预报技术在瓦斯隧道中的应用

都汶高速公路董家山隧道施工中发生特大瓦斯爆炸事故后，相关单位对董家山和龙溪两座高瓦斯隧道赋存的瓦斯情况实施了超前钻探预测预报，确保了两座高瓦斯隧道后期施工的安全贯通。文中分析了超前钻探技术在实际工程不同地段的应用效果，证明其超前钻探预测预报技术，能准确预报掌子面前方煤岩体等地质情况，还可预排掌子面前方煤岩体瓦斯，为瓦斯隧道探索预测预报方法提供了借鉴和经验。

Application of Advanced Drilling Forecasting Technology in Gas Tunnel

After the occurrence of severe gas explosion accident in Dongjiashan Tunnel construction in Dujiangyan-Wenchuan Highway,the corresponding unit carried out advanced drilling forecasting on the gas condition of Dongjiashan and Longxi Gas Tunnel to ensure safety of post-stage construction of these two tunnels.This paper analyzes the application effect of advance drilling technique in different sections of practical engineering.It is proved that advanced drilling forecasting technique may exactly forecast geological conditions of coal and rock mass ahead of tunnel face as well as eliminate coal and rock mass gas ahead of tunnel face,which provides reference and experience for gas tunnel exploration forecasting method.