基于JKSimBlast的露天矿爆破效果数值模拟研究与应用  

Numerical Simulation of Blasting Effect in Open-pit Mine based on JKSimBlast

作　　者：黄梦龙 吴钦正 李金平[4] 李桂林 徐帅[1,2] 陈庆凯[2] HUANG Meng-long;WU Qin-zheng;LI Jin-ping;LI Gui-lin;XU Shuai;CHEN Qing-kai(Key Laboratory of Ministry of Education for Safe Mining of Deep Metal Mines,Northeastern University,Shenyang 110819,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;Deep Mining Laboratory of Shan Dong Gold Group Co.,Ltd.,Yantai 261442,China;Gansu Jiu Steel Group Hongxing Iron&Steel Co.,Ltd.,Jiayuguan 735100,China)

机构地区：[1]东北大学深部金属矿山安全开采教育部重点实验室,沈阳110819 [2]东北大学资源与土木工程学院,沈阳110819 [3]山东黄金集团有限公司深井开采实验室,烟台261442 [4]甘肃酒钢集团宏兴钢铁股份有限公司,嘉峪关735100

出　　处：《爆破》2022年第3期95-99,189,共6页Blasting

基　　金：国家自然科学基金资助项目(编号:51874068、52074062);第二批新工科研究与实践项目(E-KYDZCH20201807)“矿业工程通专融合教材体系建设”。

摘　　要：爆破过程研究对于降低矿山成本,提高矿山效益具有重要作用。针对当前基于现场工业试验开展爆破效果研究周期长、工作量大、成本高,LS-DYNA等爆破模拟软件要求使用者具有较强的专业知识和力学功底等问题,论文介绍了爆破分析软件JKSimBlast功能组成,分析了露天爆破模拟模块2DBench应用流程,研究了露天矿爆破模拟分析中的块度分析模型选择、岩体损伤分析参数来源及效果评价两项关键技术及解决办法,依托某露天矿3730 m台阶开展爆破工业应用。根据爆区实际,采用5.5 m×8 m孔网参数;采用填塞7 m、装药3 m、间隔3 m、装药4.8 m的分段装药结构和填塞7 m、装药10.8 m的连续装药结构;采用425 ms孔内延时时间、17/25/42 ms地表延时时间进行爆破模拟,模拟结果表明:矿山现行爆破参数大块率高,坡顶面破碎均匀度较差,且大块趋于爆堆前端,分析原因是炮孔上部填塞长度过长。软件分析结果与现场块度分析一致,与现场观测现象吻合,表明JKSimBlast软件模拟结果可靠,用于露天矿日常爆破设计与分析可行。Research on blasting process plays an important role in reducing mine costs and improving mine benefit.However,field industrial tests have the drawbacks of long period,large workload and high cost.Moreover,blasting simulation software such as LS-DYNA requires users to have strong professional knowledge and mechanical skills.This paper introduces the functional composition of blasting analysis software JKSimBlast,and analyzes the application process of 2DBench open-pit blasting simulation module.The study includes the two key techniques and solutions of the selection of the fragmentation analysis model,the source of rock mass damage analysis parameters.Based on the 3730 m bench in an open pit mine,blasting industrial application is carried out.According to the actual situation of blasting area,the burden is determined as 5.5 m and the hole spacing is determined as 8 m.There are two charge structures:One is decked charge with stemming of 7 m,decking of 3 m,charge lengths of 3 m and 4.8 m.The other is continuous charge with stemming of 7 m,charge length of 10.8 m.The initiation network includes in-hole delay of 425 ms and surface delays of 17/25/42 ms.The simulation results show that the current blasting boulder rate of the mine is high,and the fragmentation uniformity of the slope top surface is poor,and the boulder tend to be at the front of the blast pile.The reason may be the long stemming length on the upper part of the blast hole.The software analysis results are consistent with the field fragment analysis results,indicating that the simulation results of JKSimBlast software are reliable and feasible for daily blasting design and analysis in open-pit mines.

关 键 词：露天爆破 数值模拟 JKSimBlast 爆破损伤 块度分析 

分 类 号：TD854.1[矿业工程—金属矿开采]