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Portal

January 8, 2014

Portal

A portal is the entrance and exit to an underground coal mine for people, machinery and services. It can also be a location for intake air to ventilate the mine. Most portals have a communication device such as a DAC or phone at the entrance to control the movements of traffic and people. Some portals also include a light block (similar to traffic lights)  which indicate if it is safe to enter the mine.

 

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