Sensitive Indicators And Threshold's Ditermination Study On Coal And Gas Prediction

Summary of papers at internal and abroad of coal and gas outburst prediction methods, coal and gas outburst predictors and the threshold's determination research status in details. Through the theoretical analysis of the coal and gas outburst predictors' principle, the test methods and the impact of factors. In view of the mine Huainan Panyi coal mine, Hegang Nanshan coal mine outburst prediction heading face-sensitive indicators and threshold's determination site visits. The use of statistical data on the method to predict the three indicators of the sensitivity analysis, but also the use of gray correlation analysis method to highlight the gray forecasting system According to field measurement data, the establishment of a predictor for the system of coal and gas outburst and the associated correlation coefficient of the mathematical model, the pilot obtained a sensitive indicator of coal and gas outburst seam. Finally, the use of coal cuttings desorption gas adsorption indices and the relationship between gas pressure, on-site coal sample collection and laboratory study to determine the coal cuttings gas desorption threshold indicators.