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有色金属(矿山部分):2021,73(2):11-15
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露天含水炮孔台阶爆破数值模拟与分析
王 浩1,张智宇2,3,雷 振4,李超强5
((1.昆明理工大学 公共安全与应急管理学院,昆明650093;2. 昆明理工大学 国土资源与工程学院,昆明650093;3. 云南省中-德蓝色矿山与特殊地下空间开发利用重点实验室,昆明650093;4. 贵州理工学院矿业工程学院,贵阳550000;5. 中铁十二局集团第二工程有限公司,西安710038))
Numerical simulation and analysis of bench blasting in open water-bearing hole
WANG Hao1,ZHANG Zhiyu2,3, LEI Zhen4, LI Chaoqiang5
((1. Faculty of Public Safety and Emergency Management,Kunming University of Science and Technology, Kunming 650093, China; 2. School of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093,China; 3. Yunnan Key Laboratory of Sino-German Blue Mining and Utilization of Special Underground Space, Kunming 650093, China; 4. Institute of Mining Engineering, Guizhou Institute of Technology, Guiyang 550000, China; 5. The 2nd Engineering Co.,LTD. of China Railway 12th Bureau Group, Xi''an 710038, China ))
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投稿时间:2020-09-04    修订日期:2020-09-11
中文摘要: 为了改善晋宁磷矿因孔内积水而导致爆破效果不理想的情况,在单孔药量与药包埋深不变的的情况下,只改变孔间距和排间距,利用LS-DYNA建立了孔间距为5m、6m、7m,排间距为3m和4m的6组计算模型,并通过LS-Prepost进行分析。结果表明:改变台阶爆破的孔间距与排间距均改变了爆炸应力波的叠加效果,孔间距、排间距的大小存在临界值,低于临界值时选取单元有效应力值增幅较小,综合考虑单元最大有效应力,建议采用孔间距为600cm、排间距为400cm的孔网参数。将数值模拟所得孔网参数应用于现场爆破工程,统计分析发现大块率较改进前下降20.6%,爆堆松散程度良好,块度适中,炸药单耗由原先的0.33kg·m-3下降至0.25kg·m-3。
Abstract:In order to improve the unsatisfactory blasting effect of Jinning phosphate due to the accumulation of water in the hole, under the condition that the amount of single-hole explosive and the embedding depth unchanged, only the hole spacing and row spacing were changed. Using LS-DYNA, 6 sets of calculation models with hole spacing of 5m, 6m, 7m and row spacing of 3m and 4m were established and analyzed by Ls-Prepost. The results show that changing the hole spacing and row spacing of step blasting changes the superposition effect of the explosion stress wave. The hole spacing and row spacing have critical values, and the effective stress value of the selected element increases less when the critical value is lower. Considering the maximum effective stress of the unit comprehensively, it is recommended to use hole mesh parameters with a hole spacing of 600cm and a row spacing of 400cm. The hole network parameters obtained by numerical simulation were applied to the field blasting project. Statistical analysis found that the bulk rate decreased by 20.6% compared with the previous improvement, the blast pile looseness was good, the clump size was moderate, and the unit explosive consumption was reduced from the original 0.33kg·m-3 to 0.25kg·m-3
文章编号:     中图分类号:    文献标志码:
基金项目:国家自然科学基金资助项目(52064025)
引用文本:
王 浩,张智宇,雷 振,李超强.露天含水炮孔台阶爆破数值模拟与分析[J].有色金属(矿山部分),2021,73(2):11-15.
WANG Hao,ZHANG Zhiyu,LEI Zhen,LI Chaoqiang.Numerical simulation and analysis of bench blasting in open water-bearing hole[J].NONFERROUS METALS(Mining Section),2021,73(2):11-15.

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