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Raise excavation from bottom to top without blasting is called

This question belongs to Mining Engineering Mine Development And Mining Methods
Mine Development and Mining Methods
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Raise excavation from bottom to top without blasting is called:

Answer & Solution
Correct Answer: Option A
Raise boring uses a pilot hole and reamer head to cut upward.The correct answer is: Raise boringNo explosives needed, safer and accurate.Common for ventilation and ore passes.
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