Abstract:Hongling coal mine is a coal and gas outburst mine.In order to determine the sensitive index and critical value of outburst prediction in working face, the drilling cuttings quantity (s) , initial gas emission velocity (q) and drilling cuttings gas desorption index (Δh2) under different adsorption gas pressures in coal seam are simulated by experiments, the relation between prominent prediction index and gas pressure is obtained.In this experiment, the critical value of coal face prediction index is determined based on the critical value of gas pressure 0.69MPa in regional prediction index of Hongling mine. Finally, the sensitive index and critical value of outburst prediction in No.2-1 coal face are determined by determining the sensitivity of prediction index according to the dispersion between the coal seam gas pressure and the prediction index of working face. The results of this experiment can be used as an important basis for mine outburst prevention work.
