白音诺尔露天坑底隔离矿柱爆破参数优化研究  

Optimization of Blasting Parameters of Isolated Pillars at Bottom of Baiyinuoer Open Pit

作　　者：费鸿禄 聂寒 杨智广 FEI Hongu;NIE Han;YANG Zhiguang(Research Institute of Blasting Technology,Liaoning Technical University,Fuxin 123000,Liaoning,China)

机构地区：[1]辽宁工程技术大学爆破技术研究院,辽宁阜新123000

出　　处：《矿冶工程》2023年第6期47-53,共7页Mining and Metallurgical Engineering

摘　　要：针对白音诺尔铅锌矿爆破大块率高的问题,应用ANSYS/LS-DYNA软件对扇形中深孔爆破时炸药单耗和排间延时进行数值模拟分析。依据Von Mises屈服准则,分析记录单元有效应力、振速峰值和岩石损伤面积,结果表明,炸药单耗1.16 kg/m3和排间延时100 ms时记录单元的有效应力、振速峰值和岩石损伤面积均满足设计要求。将优化后的炸药单耗和排间延时应用于现场爆破,采用交错布孔的方式,实施空间交错装药结构,对爆后爆堆采用Split-Desktop 4.0进行块度分析,结果显示,爆破大块率降至4.34%,爆破大块度问题得到有效控制。Aiming at the problem of high fragmentation by blasting in Baiyinnuoer Lead⁃Zinc Mine,the unit consumption of explosive and delay intervals between rows in a fan⁃shaped pattern of blastholes with medium depth were analyzed by numerical simulation with ANSYS/LS⁃DYNA.According to Von Mises yield criterion,the effective stress,peak value of vibration velocity,and rock damage area of the recorded unit were analyzed.The results show that with unit consumption of explosive at 1.16 kg/m3 and delay interval of 100 ms between rows,the effective stress,peak value of vibration velocity and rock damage area of the recorded unit all can meet the design requirements.The optimized parameters of unit consumption of explosive and delay interval were then applied in on⁃site blasting with blastholes in a staggered array.The muck pile after blasting was analyzed by using Split⁃Desktop 4.0,and it is found that the rock fragmentation by blasting is 4.34%,indicating that high fragmentation by blasting can be effectively controlled.

关 键 词：露天爆破 扇形中深孔爆破 ANSYS/LS-DYNA软件 数值模拟 炸药单耗 排间延时 爆破块度 

分 类 号：TD235[矿业工程—矿井建设]