A communication and monitoring system for an underground coal mine, iron ore mine, and deep underground silver mine.
Bergeron-AA; Collins-RL; Michels-JL
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract J0377076, 1981 Nov; :1-309
Advanced communication and monitoring systems were developed and demonstrated in three underground mines representing different mining techniques, geographical areas, and material mined. The first was a large coal mine in western Pennsylvania using room-and- pillar techniques and continuous mining methods. The system developed provided private telephone channels, environmental monitoring, and control of underground equipment, all on a single coaxial cable, with all system operations under the direction of a minicomputer. The second was a magnetite ore mine in eastern Pennsylvania that used block caving mining techniques. A radio system was developed that provided two-way communications between trackless vehicles and roving personnel. A unique system of UHF-VHF repeaters combined with a "leaky-feeder" transmission line offered operational and emergency features not previously found in mine communication systems. The third was a deep silver mine in the Cour d'Alene District of Idaho. This system utilizes a single wire pair to provide up to 14 voice channels. A combination of pbx, telephone carrier systems, and intercom offered private conversations, selective signaling, and emergency backup communications.
Mining-industry; Mining-equipment; Underground-mining; Monitors; Monitoring-systems; Coal-mining; Hard-rock-mines
CP; Final Contract Report
NTIS Accession No.
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract J0377076