Radiowave propagation in a coal seam with inhomogeneous rock walls

Author

Wait, James R.

Volume

29

Issue

3

fYear

1991

fDate

5/1/1991 12:00:00 AM

Firstpage

469

Lastpage

472

Abstract

An idealized slab model of a horizontal coal seam is adopted. The structure is laterally uniform, but the media within and outside the slab are allowed to be inhomogeneous in the vertical direction. A general mode equation is obtained, and simplifications are made to facilitate computation of the propagation constant of the dominant mode. Using an exponential variation of the rock conductivity, it is shown that the frequency dependence of the attenuation rate is strongest for a conductivity increasing with distance into the rock media

Keywords

coal; geophysical prospecting; geophysical techniques; mining; radiowave propagation; terrestrial electricity; EM wave propagation; attenuation; coal mine; dominant mode; exponential variation; frequency dependence; general mode equation; geoelectric; horizontal coal seam; idealized slab model; inhomogeneous rock walls; measurement; propagation constant; prospecting; radiowave transmission; technique; Attenuation; Conductivity; Dielectric losses; Electromagnetic propagation; Electromagnetic scattering; Electromagnetic waveguides; Frequency; Propagation constant; Radiowave propagation; Slabs;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing, IEEE Transactions on

Publisher

ieee

ISSN

0196-2892

Type

jour

DOI

10.1109/36.79439

Filename

79439