富水矿岩区域爆破参数优化数值模拟研究  

Numerical Simulation Study of Blasting Parameters Optimization in Rich Water Mine Area

作　　者：彭磊 王建国[1,2] 彭鑫 刘金保 张伟 PENG Lei;WANG Jianguo;PENG Xin;LIU Jinbao;ZHANG Wei(Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;Advanced Blasting Technology Engineering Research Center of Yunnan Province Education Department,Kunming 650093,China)

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093 [2]云南省教育厅爆破新技术工程研究中心,昆明650093

出　　处：《有色金属工程》2024年第8期149-163,共15页Nonferrous Metals Engineering

基　　金：国家自然科学基金面上项目(52274083);云南省基础研究计划面上项目(202201AT070178)。

摘　　要：为改善某露天矿山富水矿岩区域水孔爆破效果,通过理论分析和现场试验进行了岩屑填塞料的研究,并结合数值模拟分析了径向水不耦合装药系数、填塞长度、延期起爆对爆破效果的影响。结果表明:随着岩屑粒径的增加,填塞结构的抗剪强度也随之增加,填塞的作用也得到增强;填塞结构以<5 mm与≥5 mm粒径岩屑颗粒配比为3∶7时填塞作用最为显著;在径向水不耦合装药系数K d为1.33时,能够取得理想的爆破效果节约炸药成本;延期起爆能够提供更多的自由面有利于降低岩体破碎的块度。In order to improve the water hole blasting effect in the water rich rock area of a certain open-pit mine,a study was conducted on rock debris filling materials through theoretical analysis and on-site experiments.The influence of radial water uncoupling charge coefficient,filling length,and delayed detonation on the blasting effect was analyzed through numerical simulation.The results show that as the particle size of rock debris increases,the shear strength of the filling structure also increases,and the effect of filling is also enhanced;The filling effect is most significant when the ratio of<5 mm with≥5 mm rock debris particles is 3∶7 in the filling structure;When the radial water uncoupled charge coefficient Kd is 1.33,perfect blasting effects can be achieved to save explosive costs;Delayed detonation can provide more free surfaces to reduce the fragmentation of rock masses.

关 键 词：深孔台阶爆破 炮孔填塞 水不耦合装药 爆破参数优化 数值模拟 

分 类 号：TD235[矿业工程—矿井建设] TD804