Application of geological routing about CSAMT exploration in Gaoligong Mountain tunnel of Dali-Ruili Railway

Anomaly about CSAMT data are divided into three gradations(gradationⅤ,gradation Ⅳand gradation Ⅲ,respectively) corresponding to different level of crushed rock mass according to the resistivity value,resistivity variance and shape of anomaly.Finally,four tunnels(route)in the lines is compared and one of them is recommended in the light of engineering geological condition based extent of anomaly and hard rock about CSAMT data.