Analysis Of Slope Stability Level Using Kinematic Analysis Method And Slope Mass Rating Method At PT. MDA, Luwu Regency, South Sulawesi Province Auliya Aprilia (1), Prof. Dr. Ir.. Busthan Azikin, M.T (2), Ilham Alimuddin, S.T., M.Gis, Ph.D. (3), Dr. Eng. Hendra Pachri, S.T., M.Eng(4)
1Student, Faculty of Engineering, Hasanuddin University, Indonesia
2Lecturer, Faculty of Engineering, Hasanuddin University, Indonesia
3Lecturer, Faculty of Engineering, Hasanuddin University, Indonesia
4Lecturer, Faculty of Engineering, Hasanuddin University, Indonesia
Abstract
Slope stability is a crucial factor in open-pit mining operations, as it directly affects both operational efficiency and worker safety. Slope failures can lead to significant material losses and endanger human lives. This study aims to evaluate slope stability in the mining area of PT. MDA, located in Latimojong District, Luwu Regency, South Sulawesi Province, using the Kinematic Analysis and Slope Mass Rating (SMR) methods. The research methods include field mapping, slope geometry measurements, and discontinuity analysis using the scanline method. Rock mass parameters were evaluated using the Rock Mass Rating (RMR) classification system and subsequently modified by SMR correction factors. In addition, stereographic analysis was conducted to identify potential failure types, including planar, wedge, and toppling failures. The results show that the dominant lithology in the study area consists of igneous rocks such as gabbro and diorite porphyry, with RMR values ranging from 60 to 77, indicating fair to good rock mass quality. The SMR values reflect varying degrees of slope stability, from stable to unstable, depending on the orientation of discontinuities relative to the slope face. Recommended technical reinforcements include support systems such as bolting, shotcrete application, and drainage systems (toe ditch). In conclusion, the integrated application of Kinematic Analysis and SMR provides accurate slope stability assessments and serves as a reliable reference for geotechnical risk mitigation and slope design planning in mining operations.
Keywords: Keywords: Slope Stability, Kinematic Analysis, Slope Mass Rating, Rock Mass Rating.
