In the 11th Five-Year Plan period,the gas accidents occurred in our coal mines greatly decreased,but the coal and gas outburst accidents occurred in the same period did not synchronously reduce,the proportion of the outburst accidents in all gas accidents increased year by year.In this paper,the analysis was made on the distribution characteristics of coal and gas outburst mines in recent years,the features of the casualty accidents caused by coal and gas outbursts,the direct and indirect causes of the acci...