Influence of mine road grade and rolling resitan ce on haulage productivity and costs
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REV. MAMYM
Abstract
Este estudio tiene como objetivo reducir los costos en la fase minera, aumentando la productividad del transporte. Este incremento está más específicamente vinculado al desplazamiento durante su ciclo, relacionado principalmente con la inclinación y rodadura de los accesos. Se eligió como estudio de caso un acceso principal utilizado para el tráfico de camiones KOMATSU 830E en la mina Salobo. La metodología utilizada fue medir la velocidad instantánea con la ayuda del sistema GPS, procesar los datos registrados para determinar la variabilidad de velocidad según la inclinación de la rampa por tramos, determinar el coeficiente práctico de resistencia a la rodadura y los parámetros operativos óptimos que permitan maximizar la productividad y minimizar los costos en base a la aplicación de modelos matemáticos. El coeficiente de resistencia a la rodadura en los tramos con rampa de acceso para el camión KOMATSU 830E resultó en un promedio general de 0.034. En cuanto a la pendiente de las carreteras, los valores de 11 y 12% mostraron la mejor productividad y costos debido a la reducción de DMT, en línea con las recomendaciones internacionales.
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.
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.
Description
Vol. 6, No. 2