Abstract: The geophysical exploration methods are currently applied in the prediction of the geohazards in the tunnel excavations. This paper introduces the application of three different geophysical exploration methods, which are surface high density resistivity method, induced polarization method, and threedimensional seismic method, in the rock mass characterization in front of the tunnel excavation area. The integrity of the surrounding rock mass and the groundwater fracture zones and be reasonably identified and the remediation measures such as, grouting and supporting can be applied. The surrounding rock mass features predicted by the integrated geophysical methods were verified by the subsequent tunnel excavation. These methods are proven to be a reliable way to reveal the source of potential hazard and can ensure the construction safety.

Key words: High Density Resistivity Method, Induced Polarization Method, Three Dimensional Seismic Method, Integrated Geophysical Exploration Methods