河南城建学院学报2025，Vol.34Issue(5)：14-19,6.DOI:10.14140/j.cnki.hncjxb.2025.05.003
露天矿山不耦合装药系数优化的数值模拟研究
Numerical simulation study on optimization of uncoupled charge coefficient in open-pit mine
摘要
Abstract
When using smooth blasting technology for bench-by-bench open-pit mining,the uncoupled charge coefficient and confining pressure are important factors in improving blasting efficiency.Numerical simulation of single-hole blasting was conducted using ANSYS/LS-DYNA software to study the relationship between the un-coupled charge coefficient and blasting cracks as well as the crushed zone,in order to optimize the uncoupled coefficient and improve the utilization rate of explosive energy.The study also analyzed changes in the optimal uncoupled coefficient under applied bidirectional equal confining pressure.The results show that when the un-coupled coefficient is 1.67,the utilization rate of explosive energy is higher;the uncoupled coefficient suppres-ses the generation of random crack and guides the propagation of main cracks by reducing the intensity of stress waves and prolonging the action of gas pressure;confining pressure affects rock restraint and suppresses crack propagation;as confining pressure increases,the radius of the crushed zone first increases and then decreases;compared with the condition without confining pressure,the optimal uncoupled coefficient increases under ap-plied confining pressure.关键词
不耦合装药系数/数值模拟/粉碎区半径/爆破裂纹/露天矿山Key words
uncoupled charge coefficient/numerical simulation/radius of crushing zone/blasting crack/open-pit mine分类
矿山工程引用本文复制引用
田子涵,缪广红,孙文翔,孙伟波..露天矿山不耦合装药系数优化的数值模拟研究[J].河南城建学院学报,2025,34(5):14-19,6.基金项目
国家自然科学基金项目(11902003) （11902003）
安徽省新时代育人省级质量工程项目(研究生教育)(2024szsfkc068) （研究生教育）
