It is vital for any underground mine to have an efficient and effective ventilation system. Long-outdated systems used a two-shaft system with an open fire, which created the airflow simplythrough convection. Although technology has advanced considerably, the principle has actually remained much the same over the centuries with airflow sustained by blowing in air or suction by an exhaust fan. High-powered machinery used in the extraction of minerals and coal at greater depths means there is an increased burden on ventilation systems to maintain an acceptable working environment.
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