What is the primary purpose of ventilation raises in underground mines?
A. Ore transportation
B. Worker transport
C. Airflow circulation
D. Explosive storage
Answer: Option C
Solution (By Examveda Team)
Ventilation raises are vertical openings connecting levels to improve air movement.The correct answer is: Airflow circulationThey enable fresh air supply and exhaust of harmful gases.Crucial for mine safety and regulatory compliance.This Question Belongs to Mining Engineering >> Mine Development And Mining Methods
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