Abstract

DA SILVA MENEZES, Diogo  and  NAVARRO TORRES, Vidal Félix.  Influence of mine road grade and rolling resitan ce on haulage productivity and costs. REV. MAMYM [online]. 2021, vol.6, n.2, pp.14-22. ISSN 2519-5352.

ABSTRACT This study aims to reduce costs in the mining phase, increasing haulage productivity. This increase is more specifically linked to the displacement during its cycle, mainly related to the inclination and rolling of the accesses. A main access used for KOMATSU 830E truck traffic at the Salobo Mine was chosen as a case study. The methodology used was to measure the instantaneous speed with the aid of the GPS system, to process the recorded data to determine the speed variability according to the ramp inclination by sections, to determine the practical rolling resistance coefficient and the optimal operational parameters that allow to maximize productivity and minimize costs based on the application of mathematical models. The rolling resistance coefficient in the sections with access ramp for the KOMATSU 830E truck resulted in an overall average of 0.034. As for the grade of roads, the values ​​of 11 and 12% showed the best productivity and costs due to the reduction in DMT, in line with international recommendations.

Keywords : rolling resistance coefficient; ramp slope; speed; DMT; variable times.

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