Research On Outburst Prediction Sensitivity Index About NO.3 Coal Seam Of Sihe Coal Mine

The prediction index and the critical value of NO.3 coal seam in Sihe coal mine are only selected refer to《Provisions of the Prevention of Coal and Gas Outburst》. In the current, the sensitivity of outburst prediction index and the rationality of critical value are lack of validation in the process of prediction of NO.3 coal seam. In addition,the prediction index whether fully reflect outburst dangerous situation of NO.3 coal seam are lack of based argument.By the analysis of the characteristics of mine geology, gas occurrence, as emission and outburst,this paper find out the impact factors of outburst of NO.3 coal seam. By the analysis the relevance of prediction index and impact factors of outburst and preliminary screened out the prediction index, the indicators outburst prediction are initially identified.On the basis of prediction index for tracking study, this paper analysis the sensitivity of each prediction index and modify the correctness the "sensitivity- function" quantitative to calculate of the sensitivity of each prediction index,determining the gas content, desorption index of cuttings and tectonic coal thickness as sensitive index. Employing the "three-rate" analysis method this paper calculate the critical value of the three sensitive index are 11m³/t, 0.55mL/g.min^0.5 and 0.36m respectively,all of these correctness get confirm。...