his paper proposes a formulation of a model for the optimal location of BCDP in continuous surface mines based on the minimization of the transportation cost when considering the full lifetime of the mine. A methodological approach and a Matlab based code were developed to solve this optimization problem. Computationally wise, the algorithm follows a simple iterative non-greedy process and achieves a fairly fast result. The program is easy to use and provides a concise visualization of mine geometry and transported volume centroids. The user can modify the centroid locations of the excavated volumes, the dumping and power plant locations and adjust the extraction volumes, developing various test scenarios. The calculated optimized location of the BCDP and the corresponding total transportation cost are extremely important for BCDP placement decision.
By the application of the model it is verified that the location of the external dump affects significantly the total trans- portation cost and as a consequence the optimal location of the BCDP. Furthermore, the sensitivity analysis results show that for a 10 m change of the elevation of the BCDP, the increase in the total transportation cost is less than 1%.
In addition this algorithm can also be applied to more complex continuous surface mining operations, e.g., where the geo- metrical characteristics are irregular, the temporal production characteristics vary considerably, production rates vary by bench and sector, etc. A dynamic economic criterion can be also applied for the objective function, incorporating the revenue as well as the excavation cost (investment and operating) for the full lifetime of the mine.
his paper proposes a formulation of a model for the optimal location of BCDP in continuous surface mines based on the minimization of the transportation cost when considering the full lifetime of the mine. A methodological approach and a Matlab based code were developed to solve this optimization problem. Computationally wise, the algorithm follows a simple iterative non-greedy process and achieves a fairly fast result. The program is easy to use and provides a concise visualization of mine geometry and transported volume centroids. The user can modify the centroid locations of the excavated volumes, the dumping and power plant locations and adjust the extraction volumes, developing various test scenarios. The calculated optimized location of the BCDP and the corresponding total transportation cost are extremely important for BCDP placement decision.
By the application of the model it is verified that the location of the external dump affects significantly the total trans- portation cost and as a consequence the optimal location of the BCDP. Furthermore, the sensitivity analysis results show that for a 10 m change of the elevation of the BCDP, the increase in the total transportation cost is less than 1%.
In addition this algorithm can also be applied to more complex continuous surface mining operations, e.g., where the geo- metrical characteristics are irregular, the temporal production characteristics vary considerably, production rates vary by bench and sector, etc. A dynamic economic criterion can be also applied for the objective function, incorporating the revenue as well as the excavation cost (investment and operating) for the full lifetime of the mine.
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