What is the main challenge with room and pillar mining?
A. Ore loss in pillars
B. Excessive equipment cost
C. Limited ventilation
D. Need for explosives
Answer: Option A
Solution (By Examveda Team)
Room and pillar mining leaves behind supporting pillars.The correct answer is: Ore loss in pillarsPillars cannot always be recovered, causing unrecoverable reserves.Design optimization helps balance recovery and safety.This Question Belongs to Mining Engineering >> Mine Development And Mining Methods
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