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What is the main challenge with room and pillar mining

This question belongs to Mining Engineering Mine Development And Mining Methods
Mine Development and Mining Methods
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What is the main challenge with room and pillar mining?

Answer & Solution
Correct Answer: Option A
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.
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