深孔分段爆破成井技术在谦比西铜矿东南矿体的应用  

Application of deep hole sectional blasting technology in the south-east ore body of Chambishi Copper Mine

作　　者：易洪武 YI Hongwu(NFC Africa Mining PLC,Zambia 435100)

机构地区：[1]中色非洲矿业有限公司,赞比亚435100

出　　处：《中国矿业》2022年第6期139-143,共5页China Mining Magazine

摘　　要：谦比西铜矿东南矿体深孔采场切割井施工存在效率低下、施工困难、掘进成本高等问题。为提高切割井施工效率和降低掘进成本,本文提出了深孔分段爆破成井技术。通过研究深孔掏槽爆破机理,确保爆破过程中有足够的补偿空间,采用1个中心掏槽孔、6个空孔、8个辅助掏槽孔的布孔方式,选取掏槽孔孔径76 mm,空孔孔径152 mm,中心主掏槽孔与空孔孔间距取400 mm,通过补偿系数的计算验证了布孔方式的合理性。根据实验采场一次爆破成井的5次试验,针对15 m深井制定了底部第一分段6.5 m与第二段分段8.5 m的深孔分段爆破方案,设置了合理的延期时间。最后,将研究成果在谦比西铜矿东南矿体切割井掘进过程中进行测试,顺利爆破形成断面3 m×3 m,高度为15 m切割井。现场实际应用表明深孔分段爆破成井技术在谦比西铜矿东南矿体具有很好的适用性,可提高切割天井的成井效率,为类似的切割井爆破工程提供借鉴。There are some problems such as low efficiency,difficult construction and high driving cost in cutting well construction of deep hole stope in the south-east ore body of Chambishi Copper Mine.In order to improve the efficiency of cutting well construction and reduce driving cost,this paper puts forward the deep hole sectional blasting technology.By studying the mechanism of deep hole cut blasting,enough compensation space is ensured in blasting process,the hole layout method of 1 central cut hole,6 empty holes and 8 auxiliary cut holes are adopted.The hole diameter of the cutting hole is 76 mm,the hole diameter of the empty hole is 152 mm,and the distance between the central main cutting hole and the empty hole is 400 mm.The rationality of the hole layout method is verified by the calculation of the compensation coefficient.According to the 5 tests of blasting in the experimental stope,a deep-hole sectional blasting scheme of 6.5 m in the first section and 8.5 m in the second section is developed for the 15 m deep well,and a reasonable delay time is set.Finally,the research results are tested in the excavation of cutting well in the south-east ore body of Chambishi Copper Mine.The cut-raise with a section of 3 m×3 m and height of 15 m is successfully formed by blasting.The field application show that the deep hole sectional blasting technology has good applicability in the south-east ore body of Chambishi Copper Mine,which can improve the well completion efficiency of cutting raise and provide reference for similar cutting raise blasting engineering.

关 键 词：分段爆破 深孔爆破成井 补偿空间 孔网参数 谦比西铜矿 

分 类 号：TD235[矿业工程—矿井建设]