Abstract: This paper presents a practical final-pit optimization algorithm for open-pit metal mines based on a breakeven strip ratio and a block model of ore grade.In this algorithm，the optimum final-pit is obtained by using a cone-scanning and eliminating process to strip off the portions whose instantaneous strip ratios are greater than the breakeven strip ratio，starting from the geometrically bounded pit which is the largest possible pit limit.The algorithm can easily incorporate different final-slope angles in different directions and zones，and different bench heights in different altitude ranges.The application showed that the algorithm was computationally efficient and highly practical.

Key words: Open-pit mine, Final-pit, Optimization, Algorithm