工作面突出危险性预测敏感指标确定

Determination of the outburst risk prediction sensitive index of working face

为了确定突出煤层工作面突出危险性预测敏感指标,确保工作面突出危险性的精准预测,以四季春煤矿6号煤层为例,通过总结分析邻近区域及矿井6号煤层煤与瓦斯突出特征,构建了6号煤层工作面突出危险性预测指标敏感性分析标准。依据构建的工作面突出危险性预测指标敏感性分析标准,结合矿井工作面预测条件和《防治煤与瓦斯突出细则》相关规定,综合考察了6号煤层工作面突出危险性预测指标钻孔瓦斯涌出初速度(q)、钻屑瓦斯解析指标(K_(1))、钻屑量(S)的敏感性,结果表明:6号煤层工作面预测指标钻屑瓦斯解析指标(K_(1))敏感性较好,能够响应煤层全部煤与瓦斯突出特征;钻屑量(S)敏感性一般,响应煤层部分煤与瓦斯突出特征;钻孔瓦斯涌出初速度(q)敏感性较差,不响应煤层煤与瓦斯突出特征。最终确定钻屑瓦斯解析指标(K_(1))为四季春煤矿6号煤层工作面突出危险性预测敏感指标,为突出煤层工作面突出危险性预测敏感指标的确定提供了参考。

In order to determine the working face outburst prediction sensitive index of outburst coal seam and ensure the working face outburst risk accurate prediction.Taking No.6 coal seam of Sijichun coal mine as an example,through summarizing and analyzing the characteristics of coal and gas outburst in No.6 coal seam of the mine and adjacent areas,the sensitivity analysis standard of outburst prediction index of No.6 coal seam is established.According to the working face of outburst prediction index sensitivity analysis standard,combined with the mine working face predict conditions and outburst prevention rules,the sensitivity of the initial velocity of borehole gas gushing(q),the analytical index of cuttings gas(K_(1))and the drilling cuttings(S)are comprehensively investigated.The results show that the sensitivity of drilling cuttings gas analysis index(K_(1))is good,and it is sensitive to all the coal and gas outburst characteristics of No.6 coal seam.The sensitivity of drilling cuttings(S)is general,responding to some coal and gas outburst characteristics.The sensitivity of the initial velocity of borehole gas gushing(q)has poor sensitivity and does not respond to the characteristics of coal and gas outburst.Finally,the drilling cuttings gas analysis index(K_(1))is determined to be the sensitive index of outburst risk prediction of No.6 coal seam working face in Sijichun coal mine,which provides a reference for determining the sensitive index of outburst risk prediction.