​ABSTRACT 

Expectation of rapid change of ground in tunnel boring machine is difficult because tunnel face is not revealed. Probe drilling, tunnel seismic prediction (TSP), and tunnel electrical resistivity prospecting system (TEPS) are widely used TBM ahead prediction method. TEPS takes shortest time among these methods and has no influence on ground. In this study, disc cutter of TBM is utilized as sensor of TEPS and experimental test for checking influence of disc cutter spacing and contact area between disc cutter and ground.