Prediction of Conductive Anomalies Ahead of the Tunnel by the 3D-Resitivity Forward Modeling in the Whole Space

Table 1

The effect of the background resistivity on the electrode distance of minimum point.

Distance (m)	Background resistivity (Ωm)	Electrode distance (m)	Minimum value ()
d =10	200	10	186.6
d =10	300	10	277.2
d =10	400	10	365.1
d =10	500	10	482.2