石门揭穿突出煤层震动爆破技术条件
The technical specifications in driving the cross-cut an outburst seam by the concussion blasting method
2005-09-23
NB/T 11541-2024
顺层定向长钻孔预抽煤巷条带煤层瓦斯区域防突技术规范
Technical specifications for regional outburst prevention of gas pre extraction in coal roadway strips through directional long boreholes along the coal seam