Análise do método de recuperação de áreas degradadas da Mina de Bauxita de Juruti - Nucleação

Abstract

The Juruti Bauxite Mine , located in Juruti in western Pará , is a young mine , which has been in operation for miner Alcoa SA since September 2009 , with a current production of 4.3 million tonnes of ore washed per year. Ore mining is carried from the mining method in strips, starting with the removal of vegetation ( vegetation removal ), leaving to the stripping (removal of overlying material ) of sterile exposure of the ore layer, so that finally, there is the mining of the ore, and then initiate the recovery of the areas that were mined . In practice Juruti recovery is performed by the method of nucleation, a new application in the mining context, proposing the creation of small habitats (nuclei) within the area degraded in order to induce a heterogeneous environment, providing distinct environments in space and time. Basic techniques of nucleation are treated in order to provide greater diversity to stabilize as quickly as possible and with minimum interference of artificial energy factors, such as planting seedlings, insertion of organic matter for the growth of plants or irrigation occur. Bauxite Mine in Juruti technical transposition of soil and brushwood , artificial perches and functional planting seedlings are used . Since the technique was implemented in Juruti has been possible to recover 132 ha which , according to analysis of biotic and abiotic indicators for monitoring the PRAD assumptions , show good progress within the recovery module , where you can find pollination, fruiting and presence animals , items that demonstrate a positive recovery of these modules . This study aims to analyze the survey data obtained in the monitoring of the areas already recovered in order to verify the efficiency of application of the proposed method. A positive test indicates the efficiency of utilizing the nucleation techniques for recovery of mined areas once.