Application of UAV Electromagnetic Method in the Detection of Old Empty Water in Complex Terrain Mining Areas

Among the various hazards in the goaf, water bursting in the goaf is the most prominent, especially the old goaf caused by disorderly mining of small coal kilns. For a long time, my country’s coal industry has often used ground-based electrical methods to explore goafs and stagnant water. These ground-based geophysical methods are often affected by the complex terrain and their effectiveness is greatly compromised. Therefore, the aerial electromagnetic method data collection is tested, and the electromagnetic method that overcomes the complex terrain and ground interference through air collection is generalized for the western coal mining area. This time, the use of ultra-high-power power transmission technology can effectively excite deep anomalies, thereby providing effective support for deep detection. In addition, the electromagnetic acquisition device is fixed on the aerial unmanned aerial vehicle to obtain underground induced electromagnetic signals through resistivity. Imaging acquisition of underground electrical structure information, thereby overcoming the difficulty of ground electrical acquisition under complex terrain, obtaining high-quality electromagnetic data, accurately delineating the range of abnormal water accumulation in the goaf, and effectively guiding the safe production of coal mines.