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This question belongs to Mining Engineering Coal Mining

Coal Mining

?

In permanent lining, in hard rock the excavation reduced to finished diameter of the shaft and continuous thus for . . . . . . . . below.

A) 1 - 2 m B) 2 - 3 m C) 3 - 4 m D) 4 - 5 m

Answer & Solution

Correct Answer: Option C

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Question posted by Examveda

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