Abstract:

The Xin'an coalfield mines were threated seriously by the Ordovician limestone water and have occurred many water inrush accidents. Transient electromagnetic technology had been widely applied in bottom karst water detection, and received good results, this paper summarizes the new analysis features of transient electromagnetic applications in recent years: The severe abnormalities was the preferred area of drilling verification, then process mildly abnormal area by the governance effect of severe abnormalities; Syncline area is favorable water-rich section and have higher verification rate; To judge water inrush source, using transient electromagnetic detection results can achieve rapid and accurate identification.

Key words: transient electromagnetic, karst water, seam floor, detection practice