Application of the Outburst Elimination Technology of Pressure Relief and Drainage with Deep Hole Blasting for Coal Roadway in Xuandong No.2 Coal Mine

Based on the status that the large danger of coal and gas outburst,low speed in coal roadway driving and tense excavation replacement in Xuandong No.2 coal mine of Jizhong energy Zhangjiakou mining group,it used the outburst elimination technology of pressure relief and drainage with deep hole blasting for coal roadway in 209 area of the coal mine.The results showed that this technology played an important role in several aspects,such as the prevention and control of coal and gas outburst,enhancing the coal roadway driving speed(drilling footage per month increased from 34 m to more than 70 m),easing the tense excavation replacement,the construction of safe mine and so on.