Investigation of the stability of a fly ash pond facility using 2D and 3D slope stability analysis

L. C. de Kooker, M. Ferentinou, I. Musonda, K. Esmaeili

Research output: Contribution to journalArticlepeer-review


A numerical investigation of the effect of pore pressure regime on the safety factor and the critical failure mechanism is presented for fly ash storage facility. Pore pressures’ measurements from standpipe piezometers and pore pressure estimated from seepage analysis are used to compare the factor of safety for a fly ash slope. This was applied for considering static and seismic scenarios. A probabilistic approach was applied to account for the uncertainties resulting from the limited data available and support a qualitative risk assessment evaluation. Slope stability analysis is conducted in two and three dimensions, adopting the limit equilibrium analysis approach, and also a finite element seepage analysis, to assess the stability of the slope. The two-dimensional cross-sections were extruded to three-dimensional models to estimate the factor of safety and associated shear failure. The results from the performed analysis suggest an increase in safety factor values of 5%.

Original languageEnglish
Pages (from-to)659-668
Number of pages10
JournalMining, Metallurgy and Exploration
Issue number2
Publication statusPublished - Apr 2024


  • Fly ash dam
  • Pore water pressure
  • Slope stability

ASJC Scopus subject areas

  • Control and Systems Engineering
  • General Chemistry
  • Geotechnical Engineering and Engineering Geology
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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