Open slope stability of laterite nickel ore in Morowali utara
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Author |
Widyawati Ngasang, Astri Rahayu and Sriyati Ramadhani
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e-ISSN |
1819-6608 |
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On Pages
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1672-1685
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Volume No. |
18
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Issue No. |
14
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Issue Date |
September 30, 2023
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DOI |
https://doi.org/10.59018/0723208
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Keywords |
Stability, slope, mine, nickel.
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Abstract
Unstable slopes are very dangerous for mining activities because if this phenomenon occurs it will have an impact
on the mining activities; therefore, a slope stability analysis is needed because slope stability is a vital factor in the
planning and operation of open pit mines. The purpose of this study was to analyze the characteristics of nickel, determine
the factor of safety value and slope deformation, and determine the design of safe slope geometry in an open pit mine in
Morowali Regency. The method used in this research is survey research by taking samples to be analyzed using the Bishop
method with the Geostudio application, and the deformation of the data is analyzed using the Element method with the
Plaxis application. The results of the analysis show that the Safety Factor (SF) on Slope 2 tends to be unstable when there
is no load, with a deformation value of 0.945 cm, even after being loaded with heavy equipment and an earthquake, the
stability value on the slope decreases. While Slope 1 and Slope 3 are still in a stable condition when loaded with heavy
equipment when given additional earthquake loads, the SF on both slopes becomes unstable.
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