Z Ventilation System

The “Z” system provides the greatest pressure differential accross the goaf and gives the most flexibility for the use of dilution intakes. It is used in coal seams that have a very high gas content ( > 10 m3/t ), this type of ventilation system is used in Appin Colliery which has a gas content of 55 m3/t. Also known as “Y” as the air path is a similar shape to the letter “Y”.

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