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.