Q108
The "Rock Quality Designation (RQD)" is expressed as a percentage of:
A.
Total fracture length in rock core
B.
Length of sound rock pieces longer than 10 cm
AnswerC.
Number of fractures per meter
D.
Porosity of rock
Answer: Option B
Solution
Answer: Option B
Solution:
RQD is the percentage of intact core pieces longer than 10 cm in length.It is a widely used indicator of rock mass quality.