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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| − | 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 '''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. | A shaft mine is driven vertically to the coal deposit. A slope mine is driven at an angle to reach the coal deposit. | ||
[[category:energy]] | [[category:energy]] | ||