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Which factor determines shaft depth selection over a decline

This question belongs to Mining Engineering Mine Development And Mining Methods
Mine Development and Mining Methods
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Which factor determines shaft depth selection over a decline?

Answer & Solution
Correct Answer: Option C
Ore body depth strongly influences the choice between shaft and decline.The correct answer is: Depth of ore bodyDeclines are economical up to 1 km; deeper mines prefer shafts.Shafts are faster for vertical transport at depth.
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