What is the function of a collar in shaft sinking?
A. Dust suppression
B. Shaft mouth reinforcement
C. Pump housing
D. Blast initiation point
Answer: Option B
Solution (By Examveda Team)
Shaft collar is the reinforced area at the top of a shaft.The correct answer is: Shaft mouth reinforcementIt prevents ground sloughing and provides support for hoisting gear.Usually made of concrete or steel.This Question Belongs to Mining Engineering >> Mine Development And Mining Methods
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