Q35
What is the purpose of backfilling in mining?
A.
Ore extraction
B.
Roof support
AnswerC.
Material hauling
D.
Explosive storage
Answer: Option B
Solution
Answer: Option B
Solution:
Backfilling refers to placing waste or material into mined-out stopes.The correct answer is: Roof supportIt stabilizes the ground, prevents subsidence, and improves safety.Used in methods like cut and fill or where voids must be filled.