深孔爆破卸压抽采煤巷消突技术在宣东二矿的应用

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

针对冀中能源张家口矿业集团宣东二矿煤与瓦斯突出危险性大,煤巷掘进慢,采掘接替紧张的状况,在该矿209区域采用了深孔爆破卸压抽采煤巷消突技术。结果表明:该技术对于宣东二矿防治煤与瓦斯突出、提高煤巷掘进速度(月进尺由34 m提高到70 m以上)、缓解采掘接替紧张、构建安全矿井等方面发挥了重要作用。

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.