Dump trucks are used worldwide for handling ore and waste in most of the opencast mines. The energy consumption in dump trucks accounts for about 32 % of the total energy requirement in opencast mines. In this paper a modeling framework is developed to analyse a generic mine transportation problem with multiple dump trucks operating between multiple crushers and excavators. The minimum specific fuel consumption (SFC) of dump trucks for a specified pay load and material handling rate is optimized. The model investigates the variations of SFC with operating parameters like pay load, speed, wind speed etc. A case study of down gradient opencast limestone mine of capacity 2600 t/h shows a fuel savings of 15%. An achievable minimum SFC of 86 g/ton of ore handled is estimated using proposed model.
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