The radio-wave penetration method can detect the relative locations of abnormal structures such as collapse columns,faults and thin coal layer areas,and the mine transient electromagnetic method can estimate the water-containing situation of these structures based on the variation of the resistivity in the detection range.

Radio-wave penetration method is mainly applied to detect the abnormity structures(collapse column, fault and thin coal layer area etc),and this paper puts emphases on introducing the use of the radio-wave penetration method in exploring the crytic hydrated structure in coal layer.