Which of these stoping methods involves leaving horizontal pillars to support the roof?
A. Sublevel stoping
B. Room and pillar
C. Shrinkage stoping
D. Cut and fill
Answer: Option B
Solution (By Examveda Team)
Room and pillar leaves ore pillars behind to support the roof.The correct answer is: Room and pillarUsed for flat-lying deposits like coal and potash.Room extraction can be partial or full.This Question Belongs to Mining Engineering >> Mine Development And Mining Methods
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