Which structure prevents collapse of a shaft during sinking?
A. Shaft collar
B. Shaft liner
C. Shaft station
D. Shaft drift
Answer: Option B
Solution (By Examveda Team)
Shaft liner is a permanent internal support in the shaft.The correct answer is: Shaft linerMade from concrete, steel, or wood.Protects against water, rockfalls, and collapse.This Question Belongs to Mining Engineering >> Mine Development And Mining Methods
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