高突矿井瓦斯抽采防突评价体系的构建及应用

Application and establishment on evaluation system of gas drainage and outburst prevention to high outburst mine

为了提高矿井瓦斯抽采、防突达标评价的准确性,构建了多因素指标综合评价体系,该体系主要包括评价单元的划分、抽采基础条件分析、抽采钻孔竣工质量评价、残余瓦斯含量评价、瓦斯动力现象评价等。通过在贵州中岭煤矿12033工作面应用构建的综合评价体系,评价后钻孔控制范围内无明显空白带;钻孔均匀度间距分别为1.63、1.82 m,小于规定值2 m;残余瓦斯含量降到8 m3/t以下;工作面抽采率达到71.8%,大于规定值40%;有效避免了煤与瓦斯突出事故的发生,实现了抽采、防突达标评价工作的规范化和精细化,为贵州省高突矿井预防煤与瓦斯突出事故提供了示范,具有很好的推广应用价值。

In order to improve the accuracy of the mine gas drainage and outburst prevention standard evaluation,a comprehensive evaluation system of the multi factor indexes was established and the system mainly included the evaluation unit divided,gas drainage basic condition analysis,drainage borehole quality evaluation,residual gas content evaluation,gas dynamic phenomenon evolution and others. With the establishment of the comprehensive evaluation system applied to No.12033 coal mining face in Guizhou Zhongling Mine,after evaluating,there was no obvious blank region.The drilling borehole uniformity spacing were 1.63 and 1.82 m,which was less than the specified value of 2 m. The content of residual gas dropped below 8 m3/ t.The working face extraction rate reached to 71.8%,which was greater than the specified value of 40%.The coal and gas outburst accident occurred could be effectively avoided and the standardization and fine of the gas drainage and outburst prevention standard evaluation work were realized,which could provide the demon to the coal and gas outburst accident prevention in Guizhou high outburst mine and could have good promotion and application value.