Research On Gas Outburst Prediction Index About NO.2Coal Seam Of Xuecun Mine

Gas outburst prediction is an important means of prevention the coal and gasoutburst. While the core of outburst danger prediction is the building of the sensitiveindex and the critical value of the Xue cun Mine No.2coal seam is a prominent seam.During mining operations,there is a obvious highlight the dynamic phenomena occur.To solve this problem,this paper identified study the predict sensitive indicator systemof the Xue cun mine No.2coal seam.This paper studies the geological structural features and evolution of the Xue cunmine.It initially obtain the gas deposit law and coal and the basic characteristics of coaland outburst of the Xuecun mine No.2coal seam. Xue Village mine methane occurrencelaw studies have shown that the main controlling factors of gas content distribution isthe coal burial depth. Surrounding rock, the fall of the column, hydrogeological, faultsand folds have a certain influence of the methane occurrence. The analysis of Gasoutburst characteristic shows that the dominant factor of the prominent is the gasfactor.It base on the Gas geological rules and the on-site inspection test, and use thegray system theory and principal component analysis to quantitative analysis thesensitivity of the predictors. Based on the above studies, the initial draw is forecastsensitive indicator cuttings resolution index△h₂and residual gas content of W of theXue cun Mine No.2coal seam. We collect at the scene of different types of failure ofXue cun mine No.2coal seam, research the diffuse law of coal seam gas, the law of gasadsorption in Laboratory, and identify the coal seam gas content （pressure） and thecorrelation between the highlight risk parameters.It determine the critical value of thepredictors on the basis of analyzing the meaning of the critical value of the predict andthe use of gas parameter method and the " rate" method.To sum up, the final sensitive index of the No.2coal seam in Xue Cun mine and itsprediction critical value are drilling cuttings gas analytical indexes enables delta△h₂.The critical value is190Pa.The Residual gas content W as prediction indicator, and itscritical value is8m³/t. Through field experiment investigation test, the result is reliable.