Application of Mine Transient Electromagnetic Method in Coal Mine Collapse Area Detection

This paper introduces the basic principles of mine transient electromagnetic method, apparent resistivity formula of mine transient electromagnetic method. Using mine transient electromagnetic multi-directional cross-probing technology in the limited space of the coal mine roadway, data collection is completed. Preprocessing multi-directional cross-probing the raw datum time-depth conversion, through a comprehensive analysis of the detect effect of four points on the collapsed column, the electrical characteristics of collapse column, the location, depth and range of geological roadway excavation.