Abstract:Abstract with the increase of the depth of open-pit mining, the original open-pit mining area has not met the needs of economic and technological, so it is necessary to optimize the open-pit mining area to improve the safety and economic benefits. The safety and economy of the open pit limit optimization based on determining the economic stripping ratio by 8.42 concentrate comparison method, according to the ore occurrence conditions determine the pit width, using 3DMine, Design-Expert software for different gradient mining depth and the angle of the slope under the stripping ratio and stability coefficient fitting optimization, by stripping ratio and the stability coefficient of slope stability coefficient is close to the most potential lines on the map to determine the public production ratio 8.42 slope optimized angle and deep mining and stripping 1.2 and economic production ratio was verified through state stripping ratio, so as to establish the optimized orebody open pit boundary map, provide the technical basis for mine production.