What is the main function of a raise bore machine?
A. Extract ore
B. Develop horizontal drifts
C. Excavate vertical openings
D. Transport explosives
Answer: Option C
Solution (By Examveda Team)
Raise boring is a technique to drill vertical or inclined shafts.The correct answer is: Excavate vertical openingsIt drills a pilot hole, then enlarges it from bottom to top.Used for ventilation shafts and ore passes.This Question Belongs to Mining Engineering >> Mine Development And Mining Methods
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