Classificação geomecânica e análise de estabilidade de talude sul da Aricá Mineração

Abstract

Massive rocks are made up of portions of intact rock and discontinuities, the second being primarily responsible for decreasing the strength of rock massifs. Thus, field investigation for structural and geomechanical recognition of the rocks is indispensable for any project that involves the construction of structures on the rock or rock mass. This is a series of steps that encompasses the initial recognition and follow-up during the project. A distinction of rock mass characteristics will determine its behavior and make it possible to analyze its stability. In addition, rock strength parameters can also be determined, from these data. Classification methods such as RQD, RMR, are used as a tool to verify the quality of the rock mass. Thus, the study to be carried out aims to collect data in the field (information about the rock mass and the discontinuities present) to characterize and classify the southern slope of the Sucuri pit located at Casa de Pedra Mining and, consecutively, to analyze this information to determine its geomechanical properties by analytical methods. Therefore, these results are expected to assist the company's mining operations. According to the study, the rock mass is formed by a deformed phyllite and altogether three families of discontinuities were determined for the slope analyzed. From these results it can be concluded that the slope rupture modes are conditioned by the discontinuities, thus the calculation of the probability of slope rupture through kinematic analysis showed good representation of field conditions.