Abstract: Based on the floatingcone exclusion method and geological model of coal seam， geologically optimum pushbacks were produced in a known final pit of coal mine. A dynamic sequencing model was established and the geologically optimum pushbacks were introduced into it， with the maximum NPV (net present value) as a target function. Then the best mining path of final pit was found out as an optimal mining scheme， thus the mining sequence， production capacity and mining life regarded as three essential factors of production schedule were simultaneously optimized. A case study on an openpit coal mine shows that the mining life is 39 years， annual production capacity is 1649 million tons and the NPV is 33998 billion RMB without capacity investment taken into account. At the same time， rock and topsoil annual stripping volume as well as working face in each year are given out， which provides powerful tools for decisionmakers.

Key words: openpit coal mine, geologically optimum pushbacks, production schedule optimization, dynamic programming, floating cone method