Study on the application of comprehensive geophysical prospecting technology for the goaf detection in coal mine

Aiming at the problem that drilling technology is time-consuming and challenging to be used to explore the goaf of a coal mine, a comprehensive geophysical exploration technology is proposed to quickly delineate the goaf. Through the layout of the TEM survey line to survey the development characteristics of goaf in the work area, and then with the help of magnetotelluric sounding method to verify the goaf delineated by TEM, the abnormal area of apparent resistivity obtained by the two methods were basically consistent. And it is consistent with the mining data of coal face. Based on the comprehensive geophysical exploration technology, the problem of multiple solutions of a single geophysical exploration method is solved, which provides technical support for the exploration of goaf in similar projects in this area in the future.