Which of the following is a temporary support used during tunnel advancement?
A. Steel arch
B. Shotcrete
C. Timber sets
D. Cable bolts
Answer: Option C
Solution (By Examveda Team)
Timber sets are used as short-term support in advancing headings.The correct answer is: Timber setsOften replaced later by permanent systems like steel sets or shotcrete.Useful in small-scale mines.This Question Belongs to Mining Engineering >> Mine Development And Mining Methods
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