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Mining Engineering · Q116

Mine Supports and Strata Control

Engineering and GATE · Mining Engineering · question 116

Q116

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
Answer
C.
Not depend on extraction ratio
D.
Depend upon extraction ratio but cant determined

Answer: Option B

Solution

Answer: Option B
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