A Numerical Study of Electromagnetic Wave Propagation (RIM) In Disrupted Coal Seams

G. Liu; G. Smith; S. Thomson; K. Vozoff; P. Hatherly

doi:10.1071/EG991247

ISSN: 0812-3985
E-ISSN: 1834-7533

A Numerical Study of Electromagnetic Wave Propagation (RIM) In Disrupted Coal Seams
Authors G. Liu^a, G. Smith^b, S. Thomson^c, K. Vozoff^d and P. Hatherly^e
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^a Centre for Geophysical Exploration Research Macquarie University, NSW, 2109 ^b School of Mathematical Sciences University of Technology, Sydney, NSW, 2007 ^c Mine Exploration and Technical Services, PO Box 619Toronto, NSW, 2283 ^d Centre for Geophysical Exploration Research Macquarie University, , NSW, 2109 ^e Australian Coal Industry Research Laboratories Ltd, PO Box 83 North Ryde NSW, 2113
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 22, Issue 1, Mar 1991, p. 247 - 250
DOI: https://doi.org/10.1071/EG991247
- Published online: 01 Mar 1991

Abstract

Finite difference and integral equation methods are used to model electromagnetic wave propagation in a disrupted coal seam. The results show that easily detectable changes of electromagnetic signals will occur if a modest geological anomaly (e.g. a 60 × 6 × 2 m³ dyke) disrupts the seam.

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References

Greenfield, R. J., and Wu, S. T., (1988). ‘Electromagnetic wave propagation in disrupted coal seams’. Extended Abstracts of the 57th Internat. Annual Meeting, New Orleans.
Newman, G. A., Hohmann, G. W., and Anderson, W. L., (1986). Transient electromagnetic response of a three-dimensional body in a layered earth’. Geophysics51, 1608-1627.
Smith, G. H., Williamson, P. R., and Vozoff, K., (1990). The application of nested dissection to the solution of a 2V2-D electromagnetic problem’. Submitted to Applied Computational Electromagnetics.
Stolarczyk, L. G., Rogers G., and Hatherly, P., (1988). ‘Comparison of radio imaging method (RIM) electromagnetic wave tomography with in-mine geological mapping in the Liddell, Bulli and Wongawilli coal seams’. Explor. Geophys., 19, 169-170.
Stoyer, C. H., and Greenfield, R. J., (1976). ‘Numerical solutions of the response of a two-dimensional earth to an oscillating magnetic dipole source’. Geophysics41, 519-530.

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Article Type: Research Article

Keyword(s): coal; disruption; electromagnetic; wave

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A Numerical Study of Electromagnetic Wave Propagation (RIM) In Disrupted Coal Seams

Abstract

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