Seleção de locais para pilha de rejeitos pelo Método de Análise Hierárquica

Abstract

The increase in waste generation from mining processes has brought numerous problems related to the disposal of discarded material. Accidents involving conventional disposal methods, such as tailings dams, have become increasingly frequent, primarily due to the large volume of material stored in these structures. As a result, safer alternatives have gained prominence, including Tailings Disposal Piles (TDP). This study focused on selecting locations for implementing a pile that will serve as a storage alternative for tailings from decommissioned dams. The research considered the need for decharacterization of structures at risk of rupture. Three upstream-constructed dams located in the city of Ouro Preto, MG, were chosen as the subject of this study. The Analytic Hierarchy Process (AHP) contributed to the evaluation of multiple criteria defined to identify the locational alternative where the pile would have the greater impact. At the end of the process, the hierarchical analysis provided the individual weights of the alternatives, from which the sequence of the best locations for implementing the TDP was derived.