Reduction of fugitive methane emissions from open cut coal mines

Fugitive coal seam gas emissions from open cut coal mines occur when coal and surrounding strata is exposed and fractured as part of the mining process. This liberates the seam gas confined within the coal seams and is a large contributor to the mining industries greenhouse gas (GHG) footprint. Gas reservoir assessment is required to determine the in situ gas content and composition of the coal seams and carbonaceous strata and to define gas zones likely to be targeted in gas reduction drilling. This paper describes the drilling methods and pre-drainage practices and applications available at access and capture seam gas within mining operations. Once captured, methane can be utilised in power generation, fertiliser production, and domestic use or flared to reduce its high environment impact.