Abstract: There are always poor blasting effect in Qinghai Deerni Copper Mine.In view of the high level of big block rate，bad bottom conditions，dispersive blasting piles，low loading efficiency，and low production efficiency，the comprehensive fuzzy evaluation model was used to evaluate and optimize the blasting effect at 4 254，4 398 m platform.Therefore，the open-pit mine blasting effect evaluation model was set up，and the weight of the quantization of the qualitative index，and the non-dimensionalizing of the quantitative index are determined by means of mathematical fitting methods and considering the relationship between each evaluation sub-system.Based on these，the comprehensive evaluation model for blasting effect of Deerni Copper Mine is formed，and the evaluation results are calculated and analyzed.The key factors of affecting the blasting such as over or less drilling in on-site field，unreasonable charging structure，insufficient filling height，and non-matching between the blasting network design and the demand resulted from the improper management are summarized.Based on the current situation and the comparative tests，the blasting process design is modified in the light of the specific geological conditions in construction for separately designing the common platform and two kinds of blasting network diagrams near the slope.The results show that the evaluation model can guide the blasting in Deerni Copper Mine and improve the blasting effect，and the ability of mine production，as well as economic efficiency.So it offers some guiding significance for improving the blasting effect of open-pit mine.

Key words: Open-pit mine blasting, Blasting effect, Comprehensive evaluation, Blasting optimization