Tunnel Geological Prediction Radar Alternating Electromagnetic Field Propagation Attenuation in Lossy Inhomogeneous Medium

Abstract

Tunnel geological prediction of ground-penetrating radar waves propagation in a lossy inhomogeneous medium, there must be a high-frequency attenuation. We must consider the electrical energy and magnetic energy of the relaxation loss, while the tunnel surrounding the quality factor in determining the attenuation of the necessary elements. Three parameters are not independent of unrelated, but from a different side to reflect the attenuation. Considering the coupling effect between three parameters, culminating in the establishment of the radar electromagnetic waves attenuation coefficient, in inhomogeneous rock medium exists the presence of relaxation phenomenon. For the geological radar effectively identify the reflected wave with different properties, different absorption and attenuation characteristics to analyze and study the surrounding rock structures, are well ahead of geological forecast guidance tunneling significance. Basic theory of radar waves underground alternating electromagnetic field propagation in the homogeneous mediumThe basic theory of electromagnetic wave propagation. High frequency electromagnetic wave propagation in the medium of obedience to the differential form of Maxwell equations: 0724 2nd International Conference on Electronic & Mechanical Engineering and Information Technology (EMEIT-2012) Published by Atlantis Press,