| 摘要 |
An emergency communication system is provided in an underground mine having a plurality of locations capable of being mined. A cable extends from a central station to each of the mining locations. An emergency receiver ties into the cable located in each location and further connects to a load center which provides power to the mining equipment in that location. The emergency receiver further includes an alarm and an emergency switch and an oral communication system. A switchboard located at the central station is tied into the cable and is in independent signal communication with each location. The switchboard includes a power on/off switch and an oral communication system for each location. Activation of the system by the dispatcher or operator in the central station, or activation by a miner within a mining location, automatically turns off the power from the load center to the mining equipment in that location. Independent oral communication is possible between each location of the mine crew and the central office.
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