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Impact of coal properties and operational factors on mine gas drainage

Conference Paper


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Abstract


  • Many Australian underground coal mines have or are likely to encounter areas of

    increased gas content, which are difficult to drain. A number of factors have the potential to impact the

    overall efficiency and effectiveness of gas drainage from the mined coal seam. A mine based

    investigation was undertaken at an operating coal mine working in the gassy Bulli seam of Australia’s

    Illawarra coal measures. Gas production data from 279 inseam gas drainage boreholes was evaluated

    relative to a variety of coal properties and mine operational factors to determine the impact of each on

    gas production performance. Whilst the design of the boreholes and the drainage time had some

    impact on gas production it was the coal properties that had the most impact. Coal rank, ash content,

    gas content, seam thickness and gas composition were all found to impact gas production. In

    particular, total gas in place and degree of saturation had the most significant impact on coal seam gas

    production performance. Various recommendations are suggested.

UOW Authors


Publication Date


  • 2010

Citation


  • Black, D. & Aziz, N. (2010). Impact of coal properties and operational factors on mine gas drainage. 10th Underground Coal Operators Conference (pp. 229-240). Wollongong, Australia: University of Wollongong.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1984&context=coal

Ro Metadata Url


  • http://ro.uow.edu.au/coal/323/

Abstract


  • Many Australian underground coal mines have or are likely to encounter areas of

    increased gas content, which are difficult to drain. A number of factors have the potential to impact the

    overall efficiency and effectiveness of gas drainage from the mined coal seam. A mine based

    investigation was undertaken at an operating coal mine working in the gassy Bulli seam of Australia’s

    Illawarra coal measures. Gas production data from 279 inseam gas drainage boreholes was evaluated

    relative to a variety of coal properties and mine operational factors to determine the impact of each on

    gas production performance. Whilst the design of the boreholes and the drainage time had some

    impact on gas production it was the coal properties that had the most impact. Coal rank, ash content,

    gas content, seam thickness and gas composition were all found to impact gas production. In

    particular, total gas in place and degree of saturation had the most significant impact on coal seam gas

    production performance. Various recommendations are suggested.

UOW Authors


Publication Date


  • 2010

Citation


  • Black, D. & Aziz, N. (2010). Impact of coal properties and operational factors on mine gas drainage. 10th Underground Coal Operators Conference (pp. 229-240). Wollongong, Australia: University of Wollongong.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1984&context=coal

Ro Metadata Url


  • http://ro.uow.edu.au/coal/323/