Q40
Which technique is used to measure rock stability in underground openings?
A.
Compressed air testing
B.
Seismic reflection
C.
Rock mass rating (RMR)
AnswerD.
X-ray diffraction
Answer: Option C
Solution
Answer: Option C
Solution:
RMR (Rock Mass Rating) classifies the quality of rock mass.The correct answer is: Rock mass rating (RMR)It evaluates rock joints, strength, groundwater, and orientation.Helps in selecting support systems and mining methods.