宣东二矿Ⅲ3煤层突出预测敏感指标及临界值研究

Research of Ⅲ3 coal seam prediction of Local prediction sensitive index and critical value in Xuandong no.two mine

从预测指标主要反映指标与突出主控因素一致,指标测值随工作面突出危险大小有明显变化两个方面定性分析,并应用"三率"分析法,确定钻孔瓦斯涌出初速度q和钻屑量S为宣东二矿Ⅲ3煤层三采区的敏感指标。通过对q值和S值设定不同临界值进行"三率"分析,确定钻孔瓦斯涌出初速度q临界值为5.0L/min,钻屑量S临界值为5.1kg。

From the qualitative analysis in two aspects which main reflecting indicators of predictive index is consistent main controlling fac- tors of outburst and Index value with face outburst dangerous size has a significant change, and application of ＂ three rate＂ analysis method, determine drilling gas inrush initial velocity q and drilling cuttings weight S as the Sensitivity Index of area of three of Ⅲ 3 coal seam in Xuan- dong no.two mine. Based on the ＂ three rate＂ analysis of q and S with different hypothetical critical value, determine the critical value of drilling gas inrush initial velocity q is 5ldmin and the critical value of drilling cuttings weight S is 5.1Kg.