In order to explore the influence of buffer thickness on the production efficiency of rope shovel in a blast,buffer thickness values of 8 m,10 m,12 m and 15 m are respectively designed with a hole diameter of 251 mm and a bench height of 7.5 m in the production blasting block.Based on the statistical analysis of the rope shovel production efficiency,the blasting fragmentation distribution and the blasting muck pile height,the best buffer thickness is determined.The results show that when the buffer thickness is 10 m at different excavation depths,there is the best fragmentation distribution with the largest proportion of 400~600 mm.Moreover,the height of the blast muck pile can reach 12.6 m,which conforms to the optimal height range and loading efficiency of the rope shovel.Meanwhile,the optimum number of blast hole rows is 10,for it has a significant impact on the buffer blasting effect.If there are more than 10 rows of blast holes,the blasting effect and the loading efficiency of the rope shovel will be affected.At this time,the blasting parameters of the blast holes after the 10 rows should be adjusted.Last but not least,buffer blasting improves the effective operation time by 1 hour and reduces the ore dilution rate by 3%,which can create an economic benefit of 450 million US dollars during the full life of Husab uranium mine.It is the first time to promote buffer blasting technology to large block blasting with multiple rows(20 to 30 rows),which is not only in line with the objective needs of large-scale mine production,but also an inevitable trend after large-scale equipment is used.Meanwhile,it promotes the refined blasting of Husab Mine more,and can also provide important field data for similar mine blasting at home and abroad.