Abstract: During pit production, the change of factors such as operating cost, processing recovery and product price will have an obvious effect on pit optimization.Simple model and complex model with various changeable factors were established, base on the optimization results with different price cases, it shows that the optimized pit of complex model is more accurate.The change of various factors will be dynamically and accurately reflected on pit optimization in complex model which has a promising prospect during actual pit operation.

Key words: Open pit, Changeable factor, Economic model, Pit optimization