Mine Ventilation

When air enters any mine or other subsurface structure, it has a volume composition of approximately 78 percent nitrogen, 21 percent oxygen and 1 percent other gases on a moisture free basis. However, as the air progresses through the network of underground openings, that composition changes.   There are two primary reasons for mine ventilation.…

The Effects of Methane

Methane is a component of the earth’s atmosphere and is present at low concentrations. We inhale methane along with other atmospheric gases such as nitrogen and oxygen when we breathe. At room temperature and pressure, methane is an odourless and colourless flammable gas and is composed of carbon and hydrogen with the chemical formula of…