Alinhamento das tiras na lavra de uma mina de bauxita

Abstract

The strip mining method is a surface mining method for ore tabular deposits, in other words, with bedded formation such as bauxite deposits. The ore in this mining method is exposed in strips during the stripping stage, and the strip cutting dimensions are important parameters for the enterprise´s profitability and are defined by the long term mine planning. Thus, the extraction process geometry measured by the topography must follow the planned layout with accuracy. When this does not occur, that is, when happens the strips misalignment in the direction of advancement, it becomes difficult the information traceability and the performance indexes of mining becomes uncertain, impacting in the development of the mine plans and the control of mining effectiveness. The purpose of this study is to align the strips from a bauxite mine so to minimize the mentioned problems. The methodology consisted of defining new strip dimensions for the stripping stage until that the extraction process geometry was adjusted to the strips planned geometry. The results confirm the importance of the mining geometry for the mine plans reliability and efficiency in the control of mining effectiveness.