Analysis of Disposal Slope Safety Factor in Determining the Safe Distance of Dumping Sequence at Disposal X in Sorowako Area, East Luwu Regency, South Sulawesi Province
english
DOI:
https://doi.org/10.58227/jge.v5i1.353Keywords:
disposal slopes, dumping operations, limit equilibrium method, morgenstern– price formulation, safety factorAbstract
Slope stability assessment is essential in open disposal design to prevent failure during dumping operations. This study investigates the safety factor of disposal slopes in order to determine the safe dumping sequence distance at Disposal X, Sorowako, South Sulawesi, Indonesia. The stability evaluation was carried out using the Limit Equilibrium Method with the Morgenstern–Price formulation in GeoStudio SLOPE/W 2022. The analysis integrated slope geometry, laboratory-tested geotechnical parameters, equipment-induced ground pressure, and topographic data. Three representative cross-sections were analysed to identify critical conditions. The initial results showed that the calculated safety factors fell below the minimum regulatory requirement of 1.3. Design adjustments were therefore applied by modifying the slope sequence elevation and controlling the dumping distance. After the redesign, the safety factors increased to 1.360, 1.362, and 1.374, indicating stable conditions. The optimised configuration meets the regulatory standard and provides a reliable technical reference for safe dumping operations in the disposal area.
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