What is a raise borer used for?
A. Horizontal drifting
B. Rock bolting
C. Creating vertical holes
D. Loading ore
Answer: Option C
Solution (By Examveda Team)
Raise borer drills vertical or inclined shafts between levels.The correct answer is: Creating vertical holesIt drills a pilot hole, then enlarges from below upward, creating smooth-walled shafts.Used in ventilation raises and ore passes.This Question Belongs to Mining Engineering >> Mine Development And Mining Methods
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