Otimização do planejamento operacional de lavra com alocação dinâmica de caminhões em minas a céu aberto

Abstract

This paper presents the adaptation of a mathematical model used to optimize the operating mine planning in a coal open pit mine. In real situation, the allocation of load equipment is empirically, based on the experience of the operations manager at the time. This situation, in addition to generating constant queues, causes low utilization of trucks. In the adapted model, the allocation of the same is dynamically, based on pre-established parameters. The model allocates the fronts of mining equipment and cargo transport, in order to maintain a flow rate of ore or continuous mining and maximize the utilization of trucks. To solve this problem a model based on multiobjective linear programming used, since the problem has more than one target and they have conflicting. Initially, we chose to work with a real situation presented in the mine, to make possible the establishment of the comparative effect with reality, because there was a substantial increase in the utilization rate of transport facilities, coupled with maintaining a pace of continuous mining. Based on this knowledge, began to propose four scenarios, predicting events, such as increased levels of production, feasible increase in times of vehicles (more distant fronts) and capacity variation of the vehicle fleet cycle. The results demonstrated the efficiency of the proposed system because the objectives were achieved, allowing to achieve consistent gains, if the implementation is realized in the activity it proposes.