Determination of the outburst risk prediction sensitive index of working face

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(K₁) and the drilling cuttings(S) are comprehensively investigated.The results show that the sensitivity of drilling cuttings gas analysis index(K₁) 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(K₁) 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.