Evaluation of measuring time and signal-noise ratio in central loop TEM design

Evaluation of induced electromotive force by forward modeling based on collection of full set stratigraphic conductivity logs, and measuring time by inverse modeling, determination of loop size relative to maximum output current according to noise level, maximum voltage of transmitter and wire resistivity are important contents for designing transient electromagnetic sounding, ensuring detecting depth, acquisition of good data and completion of geological exploration. Wangjialing project in Shanxi Province shows that the electrical section with distinct stratification and structure would be obtained due to good data. Further more, to acquire resisticity of water sampled from varied layers in earth and zones in mine could provide more sufficient grounds for demonstration of geological prospecting in hydrological exploration.