Which of the following is used to prevent spontaneous combustion in coal mines?
A. Nitrogen injection
B. Roof bolting
C. Wet drilling
D. Backfilling
Answer: Option A
Solution (By Examveda Team)
Spontaneous combustion occurs when coal oxidizes and self-heats.The correct answer is: Nitrogen injectionNitrogen displaces oxygen, stopping oxidation.Other methods include sealing and temperature monitoring.This Question Belongs to Mining Engineering >> Mine Development And Mining Methods
Join The Discussion