Abstract: As the mining depth of the Tong—Man Open-pit Mine increases，the proportion of diffi⁃ cult-to-blast rock increases.To address the problems of poor connection between hole blasting and subse ⁃ quent processes，as well as poor blasting quality，the 3DMine mining engineering software was adopted to implement a detailed blasting network design.In combination with the complex geological conditions of the mining area and production requirements，research and optimization were conducted on the perforation blasting technology from aspects such as optimizing the operation organization，improving the compatibility of mine rock and blasting technical parameters，and improving the blasting construction process.Through research and practice，an operation mode of alternating planning of blasting areas and organizing perfora ⁃ tion blasting construction was gradually formed.Combined with the geological differences between the blasting working face and the blasting area in the mining area，high-precision digital electronic detona ⁃ tors，3DMine software，and PVC pipe for protecting holes were used，effectively improving the quality of drilling boreholes and blasting，enhancing the efficiency of construction organization，improving the conti⁃ nuity of the perforation and blasting process and subsequent loading and transportation equipment opera ⁃ tions，and reducing the rate of safety accidents and overall costs.The practice shows that after optimiza ⁃ tion，the dynamic average of mining and stripping reserves in the mining area has increased to more than 1.22 times the current production plan ;the efficiency of 15 m³electric shovel shifts has increased by 15% compared with the same period last year，and the production efficiency of 4.5 m³excavator shifts has in⁃ creased by 11%compared with the same period last year;the accident losses caused by the influence of floating stones and scattered rocks on equipment have decreased significantly compared to 4 years ago;af⁃ ter the improvement of blasting technical parameters，the single consumption of explosives has decreased significantly.Overall，production costs have been saved by 9.52 million RMB per year，which can provide a reference for similar open-pit mines.

Key words: open-pit mine, drilling boreholes and blasting, technology optimization, production practice, working condition adaptation