Q184
What is the purpose of "timber sets" in underground mining?
A.
Explosive handling
B.
Roof support
AnswerC.
Dust suppression
D.
Lighting
Answer: Option B
Solution
Answer: Option B
Solution:
Timber sets are wooden frames supporting mine roofs and walls.The correct answer is: Roof supportUsed in soft or weak ground conditions.Being replaced by steel and concrete supports in modern mining.