Difference between revisions of "Punch mine"
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(New page: A punch mine is a type of small drift mine used to recover coal from strip-mine highwalls or from small, otherwise uneconomical, coal deposits. A shaft mine is driven vertically to the c...) |
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Revision as of 14:17, June 24, 2007
A punch mine is a type of small drift mine used to recover coal from strip-mine highwalls or from small, otherwise uneconomical, coal deposits.
A shaft mine is driven vertically to the coal deposit. A slope mine is driven at an angle to reach the coal deposit.