ABSTRACT
During the excavation of a mining open pit, it is common to encounter several types of materials, which have resistance characteristics specific to each lithotype and, usually, have different dipping angles. These materials might have great resistance or low resistance and, due to difference between the materials behavior, a sectorization is necessary with different angles. Thus, during the elaboration of the open pit design, many stability analyses are necessary to optimize the slope angle to get better usage of iron ore, with less generation of waste. This way, the Slide 2D “Change Slope Angle” tool assists in the stability analysis to obtain the minimum safety factor considering the maximum slope angle. This paper shows the case of an open pit mine, which was sectorized according to the geomechanical behavior of the foundation materials. Then, different slope angles were tested in different scenarios to attend the minimum Factor of Safety required.
