Mapeamento litogeomecânico como subisídio para avaliação do potencial de ruptura em taludes – estudo de caso em uma mina de ferro no Sudeste do Pará

Abstract

This survey aimed to perform a kinematic analysis to evaluate the potential of the slope rupture, located in an iron mine in southeastern of Pará, as well as conduct field research and geomechanical classification of lithologies. Therefore, we used bibliographical research of the regional geology, previous works from the area, books and articles related to the topic of the geotechnics applied in the stability of slope, geotechnical mapping and data treatment in specific software. Firstly, the kinematic analyzes of the slope are made. In this parsing, the attitudes of the structural features and the plane of the face of the slope, both are considered. The main computational tool used for the analysis was the software Dips, from Rocscience. Afterwards, it was sought to make the massif classification, from the adaptation of the RMR method. As a result, it was possible to highlight the banding and fractures as the features that condition the ruptures of the planar type, wedge and toppling, as well as in overall, to verify the low quality of the rock mass, represented by the mafic rocks decomposed and soft hematite. Finally, the study proved to be efficient in predicting the types of rupture and it was possible to observe in the field their occurrence, after the reviews.