Which one of the following is used to support weak roof in underground mining?
A. Timber sets
B. Shaft lining
C. Portal gate
D. Blasting mats
Answer: Option A
Solution (By Examveda Team)
Timber sets are traditional roof support structures.The correct answer is: Timber setsThey are used in weak ground to prevent collapse.Still in use for temporary or small-scale operations.This Question Belongs to Mining Engineering >> Mine Development And Mining Methods
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