Summary and conclusions

Abandoned mine methane is part of the coal mine emissions lifecycle that in some instances can extend for decades after mining ceases. AMM has favourable characteristics for use and it can generally be produced at 15% - 90% methane, and with virtually no oxygen, if a gassy coal mine is sealed well. The characteristics differ from CMM production in that, that gas availability decreases with time as the gas remaining in the coal reservoir becomes depleted. However, an AMM reservoir with a significant biogenic component may not necessarily show similar depletion characteristics. The volume of extractable gas can be further shortened as the groundwater system recovers and progressively floods a mine which prevents gas desorbing from the coal and also potentially compartmentalizing the mine to restrict gas transmission from source to production point.

Sustainable Development Goals:

Affordable and Clean Energy

Industry, Innovation and Infrastructure

Climate Action