Q165
What is a major limitation of room and pillar mining?
A.
High ore recovery
B.
High flexibility
C.
Pillar design complexity
AnswerD.
Lack of mechanization
Answer: Option C
Solution
Answer: Option C
Solution:
Room and pillar mining leaves pillars behind, which must be carefully designed.The correct answer is: Pillar design complexityIncorrect design may lead to collapse or excessive ore loss.Requires geomechanical analysis.