Abstract: To investigate the application of TEM in underground coal mine goaf water hazard prevention and treatment from roof, the relative geophysical prospecting of 100101 coal face in Shanxi Province, which is a mine selected as practical research background, were deeply analyzed by detailed field detention of TEM. The survey reveals nine anomaly areas in 100101 working face, five was found in return airways and four in intake entry. Among the anomaly areas, number 2, 3 and 5 are relatively large with moderate amplitude. Section diagram of 35 m,70 m and 105 m on the working face roof also basically reflects the abnormal low resistance distribution trend of strata above the roof. According to the comprehensive analysis, the 2, 3 and 5 abnormal areas are the main water-rich abnormal areas of the roof of the working face. Through the field drilling verification, the verification results and the detection results have a high coincidence degree, the application effect is good.