Segurança de barragem de rejeito na mineração

Abstract

The safety of tailings dams has become a major concern worldwide because of its history of breaking with catastrophic consequences for the structures themselves, the environment and especially the loss of human lives and economic. The most frequent causes of dam failure are the phenomena of liquefaction, piping and overtopping. The first two phenomena mentioned are associated with seepage forces on the ground, which if not drained effectively, could affect the stability of slopes in the same due to increased pore pressure. The overtopping is associated with the inappropriate design of spillways, poor design of the dam crest and blocking by debris. The actions to be taken to avoid or even minimize instances of disruption of these structures are the visual inspection, instrumentation, and assess their risk potential. Are methods that provide a diagnostic of the behavior of dams, identifying anomalies that cause the loss of its integrity. Such tools, when properly implemented, are an effective means of monitoring and reduction in the number of failures of tailings dams around the world.