Research on detecting strata water-bearing property in deep coal mining area using short-offset transient electromagnetic method

This paper studied the theory and application of transient electromagnetic method(TEM) with short-offset grounded wire source to detect the hydrogeological conditions in the deep strata.It introduced the basic principles and working method of TEM with short-offset grounded wire source based on induced eddy current field.Combined with an application of detecting strata water-bearing property of deep coal mining area in one coal mine,it analyzed the geophysical characteristics of exploration area,and the geological effects and reliability of TEM which use electrical source short-offset mode in detecting strata water-bearing property of deep coal mining according to apparent resistivity and depth fine data processing.This detecting reached 1500min depth using short-offset of 1000m.The results showed that short-offset TEM can detect strata of greater depth and have better effects in detecting strata water-bearing property in deep coal mining area.