![]() ![]() ![]() ![]() Japan-Korea Joint Symposium on Rock Engineering, Fukuoka, Japan. Herryal, Z.A., Shimada, H., Ichinose, M., Matsui, K., Zulfahmi, M.F., (1999): Study on The Application of Rock Bolting Technology in Ombilin and Ikeshima Coal Mine, Ed. Society Rock Mechanics (Herausgeber ed.) Aachen. (1991): Preliminary Estimation of Rock Slope Stability Using Rock Mass Classification System, Proc. (1925): The Theory of Rupture, Proceeding of 1 st Institutional Congress of Applied Mechanics, Delft. (2001): Shear Strength of Rock Joints Based on Quantified Surface Description, Geophysical Technology Department, Sandia National Laboratories, New Mexico, USA. (1972): Volume Changes during The Deformation of Rocks at High Pressures, Int. (2006): Penentuan Kekuatan Jangka Panjang Massa Batuan Dengan Metode Tidak Langsung dari Hasil Pengukuran dan Pengujian Insitu, Disertasi, ITB, Bandung. (1985): Rock Mechanics for Underground Mining, George Allen and Unwin, London. (1989): Engineering Rock Mass Classifications, John-Wiley, New York. (1973): Engineering Classification of Jointed Rock Masses, Trans. (1968): The Effect of Specimen Size on The Strength of Coal, International Journal on Rock Mechanics and Mining Sciences & Mecahnics Abstracts, V. (1976): The shear strength of rock and rock joints, Intl. and Stephansson (1990): Rock Joint Review of Predictive Capabilities of JRC-JCS Model in Engineering Practice, Proc. ![]() This paper provides correlation between the GSI and RMR for sediment rock in coal mines. Several rock mass classification systems developed for the assessment of rock slope stability were evaluated with the condition of rock slopes in the tropics, especially Indonesian region, particularly in sedimentary rocks in the open pit coal mining area in order to get the corrected GSI equation used to characterize rock slopes based on rock mass structure quantitative analysis and discontinuities surface conditions. Rock Quality Designation (RQD), Uniaxial Compressive Strength (UCS) of rocks, discontinuity spacing, discontinuity and groundwater conditions were considered. In the RMR system, there are five main parameters i.e. Rock slopes in open pit coal mining areas, especially in Indonesia, are characterized by applying various rock mass classification systems, such as Rock Mass Rating (RMR) and Geological Strength Index (GSI), because the study area comprises well-exposed rock formations. Consequently, a precise classification of rock mass is needed for the basis of determining technical policy. External loads such as high rainfall and seismicity could play an essential role in slope failure. Instability and failure of slope occur due to many factors such as unsuited slope geometry, geological discontinuities, weak slope material due to weather influences. Rock slopes stability is important for personnel and equipment safety in the open-pit mine. ![]()
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