At present, the technique of coal-bed methane surface mine and gas drainage was mature, so it was feasible for coal-bed methane development and utilization in Sichuan Province.

目前国内外煤层气地面开采技术、井下瓦斯抽放技术均已成熟，四川煤层气开发利用是可行的。

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Deposing of fly ash is in a great degree connected with development of high salinity mine drainage water, at the same time it decreases the contamination load carried away to the surface waters.

大规模的粉煤灰的充填会产生高碱性的矿山废水，与此同时，它也减少流向地表水系的废水中的污染负荷。

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