谦比希铜矿上向中深孔爆破参数优化及应用

Optimization and application of upward medium-longhole blasting parameters in the Chambishi Copper Mine

上向中深孔分条空场充填采矿法是谦比希铜矿东南矿体北采区主要的采矿方法之一,在回采过程中采用上向扇形中深孔,超挖、欠挖、边帮垮落及大块问题严重。以谦比希铜矿东南矿体1020-1-3采场为例,对上向中深孔爆破参数进行优化,通过三维扫描仪对窿型采空区切片比较不同方案的优劣,得出合适的爆破参数为:邻排间炮孔采用平行布置,排距2.0 m,加强排设置2个孔。爆破参数优化后爆破效果较好,可为矿山生产提供新的技术方案。

The upward medium-long hole stripping open-stope filling mining method is one of the main mining methods in the northern mining area of the southeast ore body of the Chambishi Copper Mine.In the process of upward fan-shaped medium-long hole mining,overbreak,underbreak,side collapse,and big block problems are serious.In the case study of the 1020-1-3 stope in the southeast ore body of the Chambishi Copper Mine,optimization was carried out on upward medium-long hole blasting parameters,comparing the advantages and disadvantages of different schemes by slicing the dome goaf with a 3D scanner to come up with suitable blasting parameters,which is that neighbouring rows have the bore holes arranged in parallel with row spacing 2.0 m and 2 holes in reinforced rows.The optimized blasting parameters lead to good blasting performances and can provide a new technical solution for mine production.