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This question belongs to Mining Engineering Mine Supports And Strata Control

Mine Supports and Strata Control

?

Roof falls or floor heaving occurs predominently in the areas where the average extraction ratio is

A) Less than 0.43 B) 0.43 or greater C) Not depend on extraction ratio D) Depend upon extraction ratio but cant determined

Answer & Solution

Correct Answer: Option B

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Question posted by Examveda

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