Ответьте на вопросы к тексту: a) Why is ventilation of mine so important? b) What is air in mine regularly contaminated by? c) What are the main components of mine ventilation system?

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1. a) Why is ventilation of mine so important? - Ventilation of the mine is vitally important task. A sufficient amount of air must be provided to keep the lower levels of mine well ventilated.
2. b) What is air in mine regularly contaminated by? - The air in mine is regularly contaminated by smoke from blasting and exhaust from diesel powered machines.
3. c) What are the main components of mine ventilation system? - The mine needs a ventilation system, and usually it is induced ventilation with high-pressure fans on surface, blowing fresh air down through the intake shaft. There is a network of ventilation ducts in the mine. They are ventilation doors, ventilation dam (stopping) to control the airflow, passing through active work areas,Then an exhaust airway channels the polluted air away from under-ground workings.

Ответ: Ответы на вопросы представлены в решении.