Q100
Which of the following is used to prevent spontaneous combustion in coal mines?
A.
Nitrogen injection
AnswerB.
Roof bolting
C.
Wet drilling
D.
Backfilling
Answer: Option A
Solution
Answer: Option A
Solution:
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.