Raise excavation from bottom to top without blasting is called:
A. Raise boring
B. Shaft sinking
C. Slashing
D. Drop raising
Answer: Option A
Solution (By Examveda Team)
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.This Question Belongs to Mining Engineering >> Mine Development And Mining Methods
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