大直径超深竖井基岩段中深孔爆破参数优化及应用  

Optimization and application of medium-long hole blasting parameters in bedrock section of large-diameter ultra-deep vertical shaft

作　　者：李芹涛 李明辉 杨建明 周阳 杨乙 Li Qintao;Li Minghui;Yang Jianming;Zhou Yang;Yang Yi(Laizhou Huijin Mining Investment Co.,Ltd.)

机构地区：[1]莱州汇金矿业投资有限公司

出　　处：《黄金》2023年第2期4-7,13,共5页Gold

基　　金：国家重点研发计划项目(2016YFC0600800)。

摘　　要：千米级超深竖井具有地应力大、地层岩温高、穿越地层条件复杂等特点,使得竖井钻爆掘进凿岩成孔难、炮孔利用率低、井壁成形质量差。为了解决高应力坚硬围岩下竖井快速钻爆问题,结合山东某金矿超深竖井基岩段钻爆掘进,通过对起爆方式、雷管类型、炮孔设计等爆破设计参数进行分析和研究,提出了适用于大直径超深竖井基岩段中深孔爆破的参数。现场实践表明,优化爆破设计参数较好地解决了竖井轮廓成形、破碎块度、超欠挖工况等问题,实现了大直径超深竖井的快速掘进。The kilometer-level ultra-deep shaft is characterized by great ground stress, high ground temperature, and complex stratum crossing conditions, making it difficult for the drilling and blasting excavation to drill and blast the rock, causing low blast hole utilization, and poor quality of shaft wall formation.To achieve rapid drilling and blast-ing of the shaft under high stress and hard surrounding rock conditions, in a case study of the drilling and blasting excavation in the bedrock section of an ultra-deep shaft in a gold mine in Shandong Province, through the analysis and research of the blasting design parameters such as initiation mode, detonator type, and blast hole design, this paper puts forward the medium-long hole blasting parameters suitable for the bedrock section of the large-diameter ultra-deep shaft.The field practice shows that the optimization of blasting design parameters solves the problems of shaft contour forming, fragmentation, and over and under excavation, and realizes the rapid excavation of large-diameter ultra-deep shafts.

关 键 词：大直径 超深竖井 基岩段 爆破参数 双周边孔 爆破效果 

分 类 号：TD262.1[矿业工程—矿井建设]