Technology of high-speed driving and outburst elimination by CO₂ gas fracturing in Yuxi coal mine

In the process of coal roadway driving in Yuxi coal mine, gas problems including outburst index parameters exceeding the standard frequently, gas abnormal emission, gas exceeding the limitation, result in forced shutdown and slowly driving.In order to solve this problem, the technology of high-speed roadway driving and outburst elimination by CO₂ gas fracturing in Yuxi coal mine is studied.The results show the good effects as follows.After adopting CO₂ gas fracturing, the average value of K₁ exceeds the standard as 0.15 times per 100 m, which is 11 times lower than that before fracturing.Gas emission tends to be uniform and peak value of gas emission is relatively lower, which avoids gas exceeding the limit effectively.The average daily footage of roadway driving is 5.38 m, which is 1.92 times higher than that before gas fracturing.The technology of high-speed roadway driving and outburst elimination by CO₂ gas fracturing can eliminate outburst effectively and guarantee mine safety and efficient production.