The calculation of magnetic field strength in inhomogeneous medium in tasks of people's searching under avalanches in mines

摘要

The problem of mine workers searching under avalanches in mines after the accident is discussed in the paper. The radio beacon is placed at the object of search and one radiates the variable low-frequency magnetic field. Considering the attenuation of this field, it is possible to define the distance. When the search actions are carried out it is necessary to consider the influence of the subjects, which are in a zone of search, on parameters of the magnetic field. Essential influence on magnetic field distribution makes the presence of rail or bulk iron in mines. The problem of calculation of the magnetic field in the inhomogeneous environment consists in finding of resultant intensity of the magnetic field in the reception point. The stated task is solved by the composition and the solving of the integrated equation for the partially inhomogeneous environment concerning the magnetic charges which are placed on the surface of environments partition. The integrated equations and their solutions are discussed in presented paper.