针对玲珑金矿井下巷道掘进过程中，爆破效率低，爆破成本高，爆破振动大等问题，提出了一种孔内分段—二次封堵炮孔的新型装药结构及起爆方式，采用新型堵塞材料作为炮泥，充分利用电子雷管的优势，进行孔内精微差分段。掏槽中心孔由原装填 1发雷管调整为 2发，并进行孔内精微差分段，时间间隔 53 ms；对炮孔二次封堵，形成 2个独立空腔，延长冲击波孔内作用时间；并采用新型材料聚氨酯发泡胶+高效水炮泥封堵炮孔外口。实践应用表明：技术方案优化后，采用新型炮泥封堵不仅能降低粉尘和CO浓度，缩短通风时间，降低炸药单耗，还能提高生产效率，经济效益显著，为类似矿山爆破提供参考借鉴。

To address issues such as low blasting efficiency, high blasting costs, and significant blast⁃inducedvibrations during underground roadway excavation at Linglong Gold Mine, a novel charging structure and initiationmethod involving in⁃hole decking and two⁃stage stemming was proposed. This approach utilized new stemming materialsand fully leveraged the advantages of electronic detonators to achieve precise short⁃delay in⁃hole decking. The cut centerhole was modified from originally being charged with one detonator to two detonators, with precise short⁃delay in⁃holedecking of 53 ms. Two⁃stage stemming was applied to form two independent air chambers, prolonging the action time ofshock waves within the hole. Additionally, polyurethane foam glue + high⁃efficiency water⁃based stemming materialwas used to seal the outer end of the blast holes. Practical application demonstrates that after technical optimization,the use of new stemming material reduces dust and CO concentrations, shortens ventilation time, decreases explosiveconsumption per unit, and enhances production efficiency, generating significant economic benefits. This studyprovides a valuable reference for similar mining blasting operations.