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Mining Publication: Electromagnetic Location Systems for Metal/Non Metal Mines
Keywords: Signalling Through-the-earth 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 1979
Authors: AJ Farstad, RF Kehrman
Contract/MOA Report - January 1979
Download PDF Document (5.75 MB)
NIOSHTIC2 Number: 10002575
Westinghouse Electric Corporation. US Bureau of Mines Contract No. J0166100. NTIS: PB82-254525, 1979 Jan; :1-117
Characteristics of metal-nonmetal mines were evaluated to determine the suitability of applying the Bureau of Mines electromagnetic (em) location system to the problem of locating trapped miners. Statistical distributions of mine depths and overburden conductivities show that the existing Bureau em system is inadequate for most metal-nonmetal mines. Alternate approaches to trapped miner location in deep mines were identified, and subsequent field tests were conducted at six mines to evaluate their feasibility. The approach considered to be the most promising is one that uses the existing backpack transmitting system, modified slightly for a dual frequency output, in conjunction with a sophisticated signal processing receiver on the surface. The main advantage of staying with a "through-the-earth" approach is that the underground equipment can be kept simple, easily maintained, lightweight, and inexpensive.
Image of publication Electromagnetic Location Systems for Metal/Non Metal MinesContract/MOA Report - January 1979
Download PDF Document (5.75 MB)
NIOSHTIC2 Number: 10002575
Westinghouse Electric Corporation. US Bureau of Mines Contract No. J0166100. NTIS: PB82-254525, 1979 Jan; :1-117
See Also
Adaptive-Noise-Cancellation Techniques for Through-the-Earth Electromagnetics: Volume III
Basic Tutorial on Wireless Communication and Electronic Tracking: Technology Overview
Electromagnetic Detection of Trapped Miners
A Magnetic Communication System for Use in Mine Environments
Passive Fiber Optic System for Locating, Tracking, and Communicating with Personnel in Coal Mines
Propagation of EM Signals in Underground Mines
Through-The-Earth Wireless Real-Time Two-Way Voice Communications
Two-Way, Through-the-Earth Emergency Communication System for Trapped Miners and the Surface
Ultra-Low Frequency Through-the-Earth Communication Technology
Wireless Through-The-Earth Modeling and Support
Page last reviewed: November 16, 2015
Page last updated: November 16, 2015
Content source: National Institute for Occupational Safety and Health, Mining Program
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