Q119
What is the purpose of scaling in underground mining?
A.
Blasting hard rock
B.
Measuring tunnel width
C.
Removing loose rock
AnswerD.
Installing ventilation
Answer: Option C
Solution
Answer: Option C
Solution:
Scaling is done after blasting to remove loose rock from walls/roof.The correct answer is: Removing loose rockPrevents rock falls and improves safety.Performed manually or with mechanized scalers.