Abstract: In view of the problems such as high single consumption of explosive driven by extended drill pipe，poor design applicability of non-detonating cord in smooth blasting，and delayed design of elec⁃ tronic detonator cutting slot that cannot meet the requirements of penetration in Xingshan Iron Mine，com⁃ bined with actual production requirements，the experiments of reducing the explosive consumption of drill⁃ ing pipe，optimizing the design of non-detonating cable for peripheral holes by regions，and optimizing the delay time of electronic detonator for cutting slot holes were carried out respectively.By selecting reasonable technical parameters，the blasting design scheme is optimized，the blasting quality of underground mining is improved，and the overall blasting technical level of the mine is improved.

Key words: underground mining blasting, smooth blasting, electronic detonator