针对某高速公路隧道掌子面临近富水断层F4-3的地质背景，为探明掌子面前方地下水发育情况，利用瞬变电磁法开展超前地质预报工作。通过多测线、多方位的探测方式，综合分析各方位测线的探测结果，预报掌子面前方地下水的发育段落及空间分布情况。预报结果表明： 1）YK90+755~ +811段地下水发育； 2）YK90+755~+811段富水部位主要位于开挖方向的左右两侧。最后通过超前钻孔验证，瞬变电磁探测富水区域和超前水平钻孔探测出水位置基本一致，较准确地预测了地下水的发育段落。实际开挖后富水情况与瞬变电磁预报富水段落及地下水空间分布基本吻合，取得了较好的预报效果。

In view of the geological background of the tunnel face of an expressway near waterrich fault F4-3, in order to find out the situation of groundwater development in front of the tunnel face, transient electromagnetic method is used to carry out advanced geological prediction. Through multiline and multiazimuth detection methods and comprehensive analysis of the detection results of various position line, the development section and spatial distribution of groundwater in front of the tunnel face are predicted. The prediction results show that: 1) groundwater development in YK90+755~+811 section; 2) the waterrich position of YK90+755~+811 section is mainly located on the left and right sides of the excavation direction. At last, through the verification of advanced drilling, the location of the waterrich area of the transient electromagnetic detection is basically identical with the water outlet of advanced horizontal drilling, and the development stage of groundwater can be predicted accurately. The actual waterrich condition after excavation is basically consistent with the waterrich section of transient electromagnetic prediction and the spatial distribution of groundwater, and good prediction results are obtained.