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27 comments on A little more on coal mining

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JD on January 15, 2006 - 4:15am Permalink | Subthread | Comments top
How are the miners, cars and other equipment powered?
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djd on January 15, 2006 - 6:33am Permalink | Subthread | Parent | Comments top
Heavy, stationary/slow-moving equipment is probably electric or electro-hydraulic: electric power has great advantages as long as you don't have to store it.  This is doubly true in confined areas.

Besides, HO mentioned "power cables", and for these to be big enough to be specifically noted as omitted from a diagram in that scale, they would have to run fairly large loads, i.e. machinery.

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