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This question belongs to Mining Engineering Rock Mechanics And Roof Supporting

Rock Mechanics and Roof Supporting

?

The measurements of a site investigation are as follows:
In = 9, Jr = 1.5, Ja = 2.0, Jw = 1.0. SRF = 2.5. The RQD values taken from five boreholes of the area are 94.2, 95.6, 99.4, 95.3 and 98.0 respectively. The rock mass quality index (Q) is

A) 3.20 B) 5.60 C) 10.14 D) 20.10

Answer & Solution

Correct Answer: Option A

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