Q109
Which of these methods is least selective in ore extraction?
A.
Cut and fill
B.
Room and pillar
C.
Block caving
AnswerD.
Shrinkage stoping
Answer: Option C
Solution
Answer: Option C
Solution:
Block caving is a bulk mining method with little control over what caves.The correct answer is: Block cavingOre and waste collapse together, leading to high dilution.Suitable only for low-grade, massive ore bodies.