爆破2026，Vol.43Issue(1)：91-98,155,9.DOI:10.3963/j.issn.1001-487X.2026.01.010
地下金属矿山扇形孔爆破装药结构优化研究
Optimization of Charge Structure for Fan-hole Blasting in Underground Metal Mines
摘要
Abstract
This study develops an optimized fan-hole charging configuration grounded in Livingston's crater theo-ry to resolve the persistent challenges of collar zone over-fragmentation and toe region under-charging in conventional underground fan-hole blasting operations,which frequently generate undesirable oversized fragments.Numerical simu-lations employing LS-DYNA finite element software were performed to optimize fan-hole toe spacing.Through com-prehensive analysis of rock damage zone distribution characteristics under both continuous and decked charging con-ditions,this study demonstrates the superior efficacy of decked charging in damage control,with field experimental re-sults providing conclusive validation.Experimental results demonstrate that while the spaced charging configuration a-chieves comparable fragmentation effectiveness to continuous charging,it significantly reduces rock pulverization near boreholes,thereby minimizing powder mineralization.Implementation of the optimized charging structure yields stope blasting fragments with D20 and D80 sizes of 7.12 cm and 18.52 cm,respectively,with maximum block size rigorously constrained below 28.49 cm and minimal occurrence of sub-5 cm fines.关键词
中深孔爆破/装药结构优化/数值模拟/爆破块度/岩石损伤Key words
medium-deep hole blasting/optimization of charge structure/numerical simulation/blast rock size/rock damage分类
矿业与冶金引用本文复制引用
贾贝,熊赞民,郭雷,王潇,齐路路..地下金属矿山扇形孔爆破装药结构优化研究[J].爆破,2026,43(1):91-98,155,9.基金项目
国家"十四五重点研发计划项目"(2023YFC2907201) （2023YFC2907201）
中国五矿集团有限公司科技专项计划"揭榜挂帅"项目(2025ZXA01) National Key R&D Program of the 14th Five-Year Plan(2023YFC2907201),China Minmetals Corporation"Unveiling the List and Appointing the Best"Science and Technology Special Project(2025ZXA01) （2025ZXA01）
