Whole-mine demonstration of trolley phone communication improvements through use of the dedicated-wire technique.
Proceedings of the Sixth WVU Conference on Coal Mine Electrotechnology, Morgantown, West Virginia, July 28-30, 1982. Cooley WL, ed., Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract J0123017, 1982 Nov; :98-115
A whole-mine demonstration experiment was performed to assess the practical feasibility and utility of the dedicated-wire technique for overcoming poor trolley carrier phone system performance at a large underground coal mine. The technique involves the use of a single, low-loss, properly terminated and branched auxiliary wire placed in the rail haulageway. This auxiliary dedicated-wire allows signals to electromagnetically couple to the trolley wire/rail transmission line, and thereby significantly decrease the overall signal attenuation rate of the trolley wire/rail line. The in-mine dedicated-wire demonstration program and its findings and conclusions are described. The dedicated-wire technique is shown to be a valid and practical one for significantly improving carrier phone system performance in coal mines.
Mining-industry; Underground-mining; Mining-equipment; Electronic-equipment; Electronic-devices; Electrical-transmission; Electrical-systems
Proceedings of the Sixth WVU Conference on Coal Mine Electrotechnology, Morgantown, West Virginia, on July 28-30, 1982.
Arthur D. Little, Inc.