Application of Transient Electromagnetic Detection Technology in Coal Seam Floor Under the Influence of Tracks

In order to reduce the influence of tracks to transient electromagnetic detection of coal seam floor, it studied the transient electromagnetic response characteristics of coal seam floor under the influence of tracks and summarized the rule of transient electromagnetic response by physical experimental simulation and underground experiment. The results showed that the transient electromagnetic induction potential increased significantly, the decay time of induction potential was prolonged, the apparent resistivity values were significantly lower than the values without the influence of tracks in the abnormal aquifer areas. The corrected apparent resistivity profile could accurately reflect the position, range and water-bearing condition of abnormal aquifer areas of coal seam floor, which improved the accuracy of transient electromagnetic detection for the abnormal aquifer areas of coal seam floor under the influence of tracks.