Abstarct: Reducing bench production costs and improving productivity in various mining processes are key challenges in the mining industry. This study aims to analyze the factors influencing the calculation of operational costs for bench production in open-pit mines, focusing on the Sungun Copper Mine. Activities such as drilling and blasting, loading, transportation, and crushing were examined. Field data and mathematical models were employed to simulate and minimize these operations. The impact of factors such as blast hole diameter and rock fragment size on operational costs was investigated, and a model was proposed for optimizing these costs. The results indicate that optimizing blast design variables and fragmentation can significantly reduce costs and enhance productivity. Furthermore, updating blasting patterns and reducing rock fragment size improved transportation and loading efficiency while decreasing energy consumption during crushing processes. The proposed cumulative cost model in this study serves as an effective tool for analyzing and optimizing costs in various mining systems, including iron ore extraction activities. Findings reveal that adjusting variables such as blast hole diameter and rock fragment size can lead to an overall reduction in operational mining costs. Ultimately, the results of this study led to a 12.86% reduction in bench production costs, a reduction in blast hole diameter from 165 mm to 159 mm, and an increase in rock fragment size after blasting from 50 mm to 79.86 mm.