CO2预裂增透瓦斯抽采技术研究
China Coal（2018）
Abstract
针对阳泉煤业的煤层增透技术仍然未形成固化的技术措施和技术体系的问题,以寺家庄公司15205工作面进风巷为试验地点,施工12个瓦斯抽采孔和1个 CO2预裂孔进行"一孔两爆"CO2预裂增透试验.通过分析试验前后瓦斯抽采钻孔的瓦斯浓度、含量变化规律,在CO2预裂后,CO2置换和驱替了预裂孔周围的 CH4,形成以预裂孔为圆心的内侧瓦斯浓度降低区和外侧瓦斯浓度升高区.
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Key words
CO2pre-fracturing and permeability improvement,one borehole with explosion twice,drainage borehole,pre-fracturing borehole
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