露天矿台阶爆破根底产生原因分析  

Analysis of Causes for the Bedrock of Open-pit Bench Blasting

作　　者：李海超 贾诚杰 张永兵 慕建林 曲宏略[2] LI Haichao;JIA Chengjie;ZHANG Yongbing;MU Jianlin;QU Honglue(Hunan Nuclear Industry Construction Co.,Ltd.;School of Geoscience and Technology,Southwest Petroleum University)

机构地区：[1]湖南核工业建设有限公司 [2]西南石油大学地球科学与技术学院

出　　处：《现代矿业》2022年第10期89-92,共4页Modern Mining

摘　　要：爆破根底对生产的进程和人员设备的安全具有较大影响。为了减少或消除根底,以露天台阶开挖爆破为研究对象,分析爆破根底现象的生成机理;结合具体案例,借助LS-DYNA数值模拟软件,对不同因素进行分析,并通过有效应力曲线给予最直观的展示。研究发现,在合理范围内,缩小孔网参数、设置超深、增大孔径,可以降低根底率。Bedrock has a great impact on the production process and the safety of personnel and equipment.In order to reduce or eliminate the bedrock,taking open-pit bench excavation blasting as the research object,the generation mechanism of blasting bedrock phenomenon are analyzed.Combined with specific cases,LS-DYNA numerical simulation software is used to analyze different factors,and the most intuitive display is given through the effective stress curve.It is found that in a reasonable range,reducing the hole network parameters,setting the ultra-deep,and increasing the aperture can reduce the root rate.

关 键 词：露天台阶 爆破根底 预防措施 

分 类 号：TD235[矿业工程—矿井建设]