PROBABILISTIC SLOPE STABILITY ASSESSMENT FOR SUSTAINABLE MINING AT ANKPA COAL MINE, NIGERIA
- Authors
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Idris, M.A
Federal University of Technology, Akure, Ondo State, Nigeria
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Kolade, A.S
Federal University of Technology, Akure, Ondo State, Nigeria
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- Keywords:
- Probabilistic analysis, slope stability, Point estimate method, Finite element method, Reliability index, Factor of safety
- Abstract
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The Ankpa Coal Mine plays a crucial role in meeting the energy demands of Dangote cement plants in Nigeria. However, mining activities at the site pose significant risks to slope stability, potentially impacting the sustainability and safety of mining operations. To ensure responsible and sustainable mining practices, this study conducted a probabilistic slope stability assessment of the mine. Samples of laterite, shale, and coal were collected from three distinct locations (A, B, and C) within the mine, and their physical and strength parameters were determined through laboratory tests. The slope's probabilistic assessment using the factor of safety (FOS) was implemented into numerical modelling utilizing the Point Estimate Method (PEM). The slope random shear strength parameters were used as inputs for the finite-element numerical simulations to determine the corresponding FOS for each location. This study also investigates the influence of slope angle on the probability of slope failure, providing valuable insights into potential instability triggers. The results indicated that location C exhibited higher susceptibility to slope instability compared to the other locations. Consequently, appropriate slope angle recommendations were proposed for each location to mitigate the risk of slope failure effectively.
- Author Biographies
- References
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- 2024-11-20
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