What is the primary purpose of a collar level in shaft development?
A. Provide electrical connection
B. Control dust
C. Provide horizontal access from shaft
D. Anchor shaft guides
Answer: Option C
Solution (By Examveda Team)
Collar level is the first horizontal opening from a vertical shaft.The correct answer is: Provide horizontal access from shaftActs as a hub for early excavation or logistics.Often used during sinking and construction stages.This Question Belongs to Mining Engineering >> Mine Development And Mining Methods
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