Claim Missing Document
Check
Articles

Found 2 Documents
Search

Stable Slope Design Based On Limit Equlibrium Method (Lem) And Finite Element Method (Fem) At Pit X, Lahat, South Sumatra BAGASKORO, MUHAMAD NUR; Irvan Shopian, Raden; Ramadian, Aldrin
Journal of Geological Sciences and Applied Geology Vol 7, No 3 (2023): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v7i3.53006

Abstract

Coal mining process using open pit mining method is closely related to slope stability. A slope whose stability is disturbed will have a higher potential for landslides. The slope stability analysis in this research is conducted by Limit Equilibrium Method (LEM) with the calculation of Morgenstern-pice slice method and Finite Element Method (FEM) with the calculation of Shear Strength Reduction. The highwall simulation was modeled with a Bench height of 10 meters, Bench width of 6.5 meters and bench tilt angle varying between 30°, 45°, 60° and groundwater condition using steady state FEA. From the results of the LEM analysis on the highwall with a bench tilt angle of 30 °, 45 °, 60 ° has a safety factor value of 1.005; 0.76; 0.584. While the results of the FEM analysis on the highwall with a bench tilt angle of 30 °, 45 °, 60 ° have a Strength Reduction Factor value of 0.98; 0.72; 0.57. Comparison of the safety factor values of the two methods has an average difference of 1-2%. This is because the FEM takes into account the stress-strain in the material which describes how the material behaves. The stable slope design based on LEM is a highwall slope with a Bench slope angle of 22° which has a safety factor value of 1.478 and based on FEM is a highwall slope with a Bench slope angle of 22° which has a Strength Reduction Factor value of 1.42.
Slope Stability Analysis Using Limit Equilibrium and Numerical Modeling Bagaskoro, Muhamad Nur; Mulenga, François K.; Yu, Hai-Sui
RESWARA: Jurnal Riset Ilmu Teknik Vol. 2 No. 3 (2024): RESWARA: Jurnal Riset Ilmu Teknik, July 2024
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v2i3.391

Abstract

Slope stability analysis is a fundamental aspect of geotechnical engineering due to its direct implications for infrastructure safety, mining operations, and disaster mitigation. Traditional analytical approaches, particularly the Limit Equilibrium Method (LEM), have been widely applied owing to their simplicity and clear mechanical interpretation. However, the increasing complexity of slope geometries, heterogeneous material conditions, and hydro-mechanical interactions necessitates the integration of numerical modeling techniques such as the Finite Element Method (FEM). This study presents a comprehensive slope stability analysis by systematically integrating LEM and FEM to evaluate safety factors, failure mechanisms, and critical slip surfaces. The research employs Bishop and Janbu methods within the LEM framework and the Shear Strength Reduction technique in FEM-based numerical simulations. Results demonstrate strong consistency between the two methods, with safety factor deviations generally within 1–3%, confirming findings reported in previous studies. FEM provides enhanced insight into stress redistribution, plastic zone development, and progressive failure behavior, which cannot be fully captured by conventional LEM. The study concludes that a hybrid analytical–numerical approach significantly improves reliability in slope stability assessment, particularly for complex geological and loading conditions. This research contributes to methodological refinement and offers practical guidance for slope design in civil and mining engineering applications.