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Which factor determines shaft depth selection over a decline?

A. Ventilation needs

B. Rock type

C. Depth of ore body

D. Number of miners

Answer: Option C

Solution (By Examveda Team)

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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