Which of these is not a common shaft sinking method?
A. Drill and blast
B. Raise boring
C. Caisson sinking
D. Longwall slicing
Answer: Option D
Solution (By Examveda Team)
Shaft sinking involves vertical access creation using several techniques.The correct answer is: Longwall slicingLongwall is a coal mining method, not used for shafts.Raise boring and caisson are modern shaft techniques.This Question Belongs to Mining Engineering >> Mine Development And Mining Methods
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