摘要
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CO_2预裂孔进行"一孔两爆"CO_2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CO_2预裂后,CO_2置换和驱替了预裂孔周围的CH_4,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。
Aiming at the problem that the technical measures and systems for the consolidation of coal seams permeability im- provement technology in Yangquan Coal Industry were still not formed, taking the 15205 work face of Sijiazhuang Mine as experimental site, 12 gas drainage boreholes and 1 CO2 pre-fracturing borehole were constructed to undertake ＂one borehole with explosion twice＂ CO2 pre-fracturing and permeability improvement technology experiment. By analyzing the gas density and gas content before and after the experiment, it was concluded that CO2 substituted and displaced CH4 around the pre-fracturing boreholes and, the inner gas density reducing area and the outside gas density increasing area were formed with the CO2 pre-fracturing borehole as center.
出处
《中国煤炭》
2018年第2期105-108,共4页
China Coal
基金
山西省煤层气联合研究基金资助项目(2015012013)
山西能源学院院级科研基金(ZZ-2017002)
关键词
CO2预裂增透
一孔两爆
抽采孔
预裂孔
COx pre-fracturing and permeability improvement, one borehole with explosion twice, drainage borehole, pre- fracturing horehole
