Q49
What is the primary support used in weak underground conditions?
A.
Blasting mats
B.
Timber sets
AnswerC.
Raise bore
D.
Drift wall
Answer: Option B
Solution
Answer: Option B
Solution:
Timber sets are commonly used to support weak or fractured rock.The correct answer is: Timber setsComposed of vertical and horizontal wooden beams, they stabilize tunnels and stopes.Especially useful in narrow vein mines and older operations.