Vol. 11, Issue 10, Part D (2025)

Tunnel-detection TEM is an effective tool for exploration of anthracite coal and detection of flood accident in pit. The paper presents solutions for efficient use of limited power supply (batteries) while improving exploration accuracy in TEM system used for tunnel detection. They include the circuit for fast turn-off of transmitter current, the shielded receiver loop, and the selection method of optimal stacking-times. The experimental results show that these solutions are valuable in preventing unnecessary power increase, whole-space effect, and excessive stacking.