Mapeamento litogeomecânico das cavas central e sudeste da mina Serra Leste

Abstract

The Carajas Province represents the oldest crustal portion with the largest volume of exposed Archaean rocks of the Amazonian Craton, and it is located on its south-eastern border, in the southeast of the state of Pará. Its deposits contain Fe content higher than 64% and reserves of 17.3 billion tons. In this context, stands out the Serra Leste Mine, it is an important deposit located in the area of Curionópolis shire. Although, the deposit great economic importance, the studies related to geological-geotechnical mapping in detail scale in the project area are scarce, making it difficult planning short-term mineral exploration. This research main goal is related to supply the absence of a lithological map of the pit of the Serra Leste Mine on a scale that is applicable on its block model and production. The data of Visual and Interpreted Lithographic Classification obtained during the research, revealed the presence of 5 lithotypes in the area, they are: Chemical Canga, Structural Canga, Decomposed Mafic, Compact Hematite and Friable Hematite. The geomechanical survey allowed setting the value of important Rock Factor parameters to reaching out a high performance for the Serra Leste disassemble activity.