高压物理学报2025，Vol.39Issue(12)：100-112,13.DOI:10.11858/gywlxb.20251086
基于DEM-PBM方法的不同抵抗线下爆破漏斗试验规律研究
Blasting Crater Test Law under Different Resistance Lines Based on DEM-PBM Method
摘要
Abstract
In open-pit blasting project,the minimum resistance line(W)determines the dominant direction of blasting energy release and the maximum direction of rock velocity.This parameter is the core factor controlling the blasting action range,crushing effect and throwing path of the rock.Based on discrete element method-population balance model(DEM-PBM)coupling numerical simulation method of blasting crater,field blasting crater test was carried out through multi-scale modeling and test data collaborative analysis.The rock breaking law of blasting crater test under different minimum resistance lines was studied in order to optimize blasting parameters and improve blasting efficiency and safety.Based on the comparison of numerical simulation results,the blasting expansion area at 20 ms increases by 70.33%compared with that at 5 ms when W=1.05 m,and the blasting expansion area increases by 11.42%when W=1.85 m.By comparing the throwing effect of fragmentation under different minimum resistance lines,the throwing effect is the best when W=1.05 m.According to the results of field blasting crater test,when the length of the resistance line increases,the volume of the blasting crater becomes smaller,and the volume of the blasting crater is the largest when W=1.05 m,which is similar to the blasting cavity expansion law obtained through numerical simulation.The fractal law of fragmentation size in field blasting was analyzed.When W=1.05 m and the depth of blast hole is 1.2 m,more rock blocks are thrown,the fragmentation distribution is moderate,and the throwing effect of broken blocks is the best.This study provides reference for the optimization of field drilling and blasting parameters.关键词
DEM-PBM法/爆破漏斗/抛掷作用/爆破块度Key words
DEM-PBM method/blasting crater/throwing action/blasting fragmentation分类
矿业与冶金引用本文复制引用
何德福,王凯,李煜程,李卓,张智宇,黄永辉,罗毅..基于DEM-PBM方法的不同抵抗线下爆破漏斗试验规律研究[J].高压物理学报,2025,39(12):100-112,13.基金项目
国家自然科学基金(52064025) （52064025）
云南省青年基金(CB24136C168A) （CB24136C168A）
