Research on electromagnetic wave through-the-earth wireless communication for coal mine disaster

Abstract

When the coal mine disaster happens, the communications system paralysis causes the fact that the stranded personnel and the rescue groups are unable to relate. This situation is the biggest difficult problem which the coal mine rescue work confronts. To establish an electromagnetic wave through-the-earth wireless communications system for coal mine, will give the trapped personnel more survival hopes. Through the analysis of transmittance rule of the very low frequency electromagnetic wave in the semi-conductive medium and the comparison between the electrical antenna and magnetic antenna, this article proposed a feasible implementation plan of the electromagnetic wave through-the-earth radio communications system for the coal mine disaster relief. © 2011 Springer-Verlag.