Methane Drainage--an Update.
Min Cong J 1978 Jul; 64(7):38-42
In the 1970's, U.S. coal production reached an alltime high. As other fuels became scarcer and more expensive, the demand for coal could double by 1985 and more than triple by the end of the century. It has been estimated that 600 to 800 new mines will be needed to meet the increased demand for coal. As shallow reserves of coal are depleted, more new mines will be opened in deeper parts of the coalfields. In all probability, such new deep mines will be extremely gassy. Dependence on ventilation alone to control methane emission may be prohibitively expensive and may seriously limit productivity. It is most likely that safety and productivity considerations will require that methane be drained from the coal in advance of mining.
Min. Cong. J., V. 64, No. 7, July 1978, PP. 38-42