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Slope Stability of Metamorphic Rocks Based on Rock Mass Classification at Poboya Gold Mine, Central of Sulawesi Province
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DOI: https://doi.org/10.15866/irece.v9i3.13889
Abstract
Poboya Mountains is one of the gold mines located in Palu city. Miners conduct quarrying and slope slicing to extract gold ores every day, resulting in changes on slope stability. The research is to determine rock mass classification and slope stability of metamorphic rocks. The research conducted at Poboya Gold Mine, it geographically located at central of Sulawesi province. The classification of rock mass carried out through a field survey and a laboratory testing, and then determined according to methods of RMR and SMR. The results showed that for gneiss at location 1, it obtained values of 60-69 for RMR and SMR as well. Meanwhile, for schist at location 2, the obtained values are 56-71 for RMR and 57-79 for SMR. Schist at location 3 has values of 65-75 for RMR and 69-79 for SMR, and schist at location 4 have values of 56-70 for RMR and 59-85 for SMR. Referring to the rock mass classification results, it can be concluded that slopes location at Poboya with a good quality of rock mass is at schist of location 3. Generally, slopes considered stable, hence there will be no landslides, and if landslide occurs, it will merely occurs on small blocks.
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