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This question belongs to Mining Engineering Mine Supports And Strata Control

Mine Supports and Strata Control

?

The pressure arch in longwall workings have its apex or crest at a mm height above the seam at nearly . . . . . . . . times the length of face.

A) 1 B) 3 C) 2 D) 4

Answer & Solution

Correct Answer: Option C

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Question posted by Examveda

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