【摘要】 祁南煤矿地质条件复杂,为煤与瓦斯突出矿井,72煤层为突出煤层。716工作面位于72煤层突出危险区,煤层原始瓦斯含量为9.4~11.7 m3/t,采取顺层钻孔预抽为主、底板穿层钻孔预抽为辅的区域防突措施后;采用直接测定最大残余瓦斯含量、用抽采量反算残余瓦斯含量、钻屑瓦斯解吸指标△h2检验消突效果,各项指标均小于临界值,综合分析认为716工作面抽采后已消除突出危险。更多还原

【Abstract】 Qinan Coal Mine is gas outburst mine under complex geological conditions,72 coal seam is outburst coal seam. Highlight the danger zone and 716 working face in 72 coal seam primitive gas content of 9. 4 ~ 11. 7 m3/t,take bedding drilling drainage supplemented,bottom wear layer drilling drainage area after the outburst prevention measures; the maximum residual gas content determination of directly using the the drainage quantity inverse residual gas content,the gas desorption index of drill cuttings test h2 eliminating outburst effect,the indicators are less than the critical value,the comprehensive analysis shows that 716 face danger elimination after extraction has been outstanding.更多还原