The implementation of UHF radio communications and CCTV monitoring systems in a room and pillar metal/non-metal mine.
Isberg-RA; Kramer-H; Parrish-DA
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract J0377044, 1981 Mar; :1-132
This report describes the design and implementation of radio and closed-circuit television systems in the Black River room-and-pillar limestone mine near Butler, Pendleton County, Kentucky. Prior to designing the radio system, measurements of signal attenuation on 812 and 466 mhz were made in the slope tunnel and in the straight and level crosscuts in the mine. Two distributed antenna systems fed by two sets of base stations provide approximately 75 pct coverage of the mine. Passive reflectors were used for extending signals into intersecting crosscuts and two-way signal boosters will be used to extend signals to the perimeter and obstructed areas of the mine. Fourteen mine vehicles were equipped with mobile radios with digital identification, alarm, and status encoders. Fifteen portable transceivers also were used. Six closed-circuit television cameras provide surveillance of critical transfer points of the belt conveyor system, the loading dock at the base of the slope, and an ash disposal area in the mine. Two-way radio communication and closed-circuit television have saved considerable work hours, increased production, reduced maintenance costs, and enhanced safety.
UHF Radio System; Mine Communications; Distributed Antenna System; Passive Reflectors; Signal Margin measurements; Two-Way Signal Booster; Closed Circuit TV Systems for Mines
CP; Final Contract Report
NTIS Accession No.
OFR 131-81; Contract-J0377044
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract J0377044