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Which mining method involves retreating the face and allowing the roof...

This question belongs to Mining Engineering Mine Development And Mining Methods
Mine Development and Mining Methods
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Which mining method involves retreating the face and allowing the roof to collapse behind?

Answer & Solution
Correct Answer: Option B
Longwall mining is common in coal mining with high productivity.The correct answer is: Longwall miningPowered supports advance with the face while the roof collapses in the gob area.This method is highly mechanized.
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