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Mining Publication: Above-the-Earth Field Contours for a Dipole Buried in a Homogeneous Half-Space
Keywords: Numerical modeling Personnel tracking Wireless node communications systems
This page is archived for historical purposes and is no longer being maintained or updated. Contact NIOSH Mining if you need an accessible version.
Original creation date: January 1983
Authors: SM Shope
Report of Investigations - January 1983
Download PDF Document (0.33 MB)
NIOSHTIC2 Number: 10003055
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, NTIS No. PB84-113356, RI 8781, 1983 Sep; :1-14
An essential element of the Bureau of Mines electromagnetic location and communication system for trapped miners is a quantitative knowledge of the surface and above-surface electromagnetic fields created by an underground transmitter. The field solutions given in this report use approximations in which the displacement currents are negligible for low frequencies. The earth is represented by a homogeneous half-space model in which a dipole source is immersed. The vertical magnetic field equipotential contours at and above the surface are graphically mapped. The volumes of the regions bounded by these contours are directly related to the geometrical zones of signal detectability. Knowledge of the detectability zones will enable the proper search strategies to be developed for airborne detection of trapped miners.
Image of publication Above-the-Earth Field Contours for a Dipole Buried in a Homogeneous Half-SpaceReport of Investigations - January 1983
Download PDF Document (0.33 MB)
NIOSHTIC2 Number: 10003055
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, NTIS No. PB84-113356, RI 8781, 1983 Sep; :1-14
See Also
Advanced Tutorial on Wireless Communication and Electronic Tracking: Appendix B
Degasification System Selection for U.S. Longwall Mines Using an Expert Classification System
Emergency Communications and Tracking
Mine Communications and Tracking Glossary
Mine Communications Engineering and Compatibility Guidelines
Passive Fiber Optic System for Locating, Tracking, and Communicating with Personnel in Coal Mines
Straight Line Walking and Path-Turn Identifying Algorithms for a Tracking Device Used in Underground Mines
Technology News 544 - New Measurement Tool to Validate Wireless Communications and Tracking Radio Signal Coverage in Mines
Through-The-Earth Wireless Real-Time Two-Way Voice Communications
Wireless Mesh Mine Communication System
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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