A Prediction Model Based on the Long Electrode Source for Fault Anomaly in Tunnel

Table 1

The influence of real distance and length of LE source on apparent resistivity curve and their prediction distances and errors.

Distance (m)	Offset ()	Length (m)	Predicted distance (m)	Error (%)
				-3.75
				4.16
				-6.33
				1.59
				3.46
				2.17
				0.89
				-0.39
				1.47
				0.19
				-1.09
				-2.38