Regional Outburst Risk Prediction And Control In Eastern First Mining Area Of Dashuitou Coal Mine

Gas is one of the major disasters and safety hazards with regard to gas coal mine.In the comprehensive prevention and control of gas,the gas management must be effective,reliable and prescient to avoid its blindness.In recent years,coal and gas outburst accident occured in some coal mines under construction,that are more likely going to happen in some coal mines with increasing of mining depth and intensity.Therefore,it is necessary to predict the outburst risk of coal seam for prevention.First of all.Mine gas grade identification results in recent decades of DaShuiTou and eastern first mining area were summarized.Secondly,based on gas geology data,the measurement of gas pressure,gas content,robustness coefficient,initial velocity of gas release and type of destruction were carried out.Based on the above parameters,a single index method and a comprehensive index method were used to predict the regional analysis of the eastern first mining area of DaShuiTou coal mine.The reason of gas transfinite caused by roof caving in 103 working face of eastern first mining area was analyzed,that was caused by roof caving because of coal quality change due to geologic structure and without support parameters adjustment timely.Additionally,the effect analysis of gas decline in pre-drainage coal seam of eastern first mining area were implemented.In conclusion,in terms of the analysis,the eastern fist mining area was determined as the non-outburst danger zone of coal and gas.