【摘要】 针对松软岩体条件下传统分段爆破作业效率低、安全性差、成本高等问题，开展了数码电子雷管深孔爆破高效成井技术研究．以备战铁矿6号切割井为工程背景，针对19.3 m切割井深的松软破碎岩体，创新设计两次分段上向深孔快速成井爆破方案．通过理论计算确定了孔间延时50 ms、层间延时300 ms等关键爆破参数，采用大直径空孔127 mm作为补偿空间，装药孔直径76 mm，合理设计了炮孔布置和起爆顺序．现场试验结果表明：爆破后顶断面规整，顶板完整性好，爆破块度均匀，实测高度达到设计要求．技术经济分析显示：相比普通法掘进，深孔爆破法成本降低53%，节约时间6天，施工效率显著提高．2次分段爆破有效减少了对破碎岩体的频繁扰动，避免了岩石垮落，结合数码电子雷管的精确起爆控制，大幅提升了作业安全性．更多还原

【Abstract】 To address the low efficiency, poor safety, and high costs associated with traditional segmental blasting in soft rock conditions, research is conducted on high-efficiency deep-hole blasting techniques using digital electronic detonators. Taking the No. 6 cutting shaft at the Beizhan iron ore mine as the engineering context, an innovative two-stage upwarddirected deep-hole rapid shaft sinking blasting plan is designed for the 19.3-meter-deep cutting shaft in soft, fractured rock. Through theoretical calculations, key blasting parameters are determined, including a 50-millisecond inter-hole delay and a 300-millisecond inter-layer delay. A large-diameter empty hole(127 mm) is utilized as a compensation space, with a charge hole diameter of 76 mm. The blast hole layout and initiation sequence are rationally designed. Field test results demonstrate: the top surface remains well-defined after blasting, with good roof integrity and uniform block size. The measured height meets design requirements. Technical-economic analysis reveals: compared to conventional tunneling methods, deep-hole blasting reduces costs by 53%, saves 6 days of construction time, and significantly improves operational efficiency. The twostage blasting approach effectively minimizes frequent disturbance to the fractured rock mass, preventing rock falls. Combined with precise detonation control using digital electronic detonators, this method substantially enhances operational safety.更多还原