Back-analysis study on slope instability in an open pit mine (Algeria)

Abstract

Purpose.To analyze the sliding from the geotechnical point of view and to identify the plausible causes that influence it. Methodology. To analyze the sliding from the geotechnical point of view and to identify the plausible causes that influence it, our study follows the following chronological order. Firstly, a feedback reconstructs the slip from the geotechnical point of view; a backanalysis is required to confirm the surface failure. Next, a check will be made of the surface failure through the finite differ ence method and using the shear strength reduction by finite difference method (SSRFD). A parametric study on the influence of the geometric parameters is performed to see the influence of the latter on the stability. The plausible cause that has directly influenced this sliding is shown.findings. This paper considers the application of three methods: limit equilibrium method (LEM), finite element method (FEM) and finite difference method (FDM) to perform back analysis and find out the layer of slope failure in an open pit mine.originality. Three different approaches LEM, FEM and FDM were used to perform the backanalysis the rock mass properties and to investigate the slope failure mechanism and the accuracy of this method in mining engineering field.Practical value. This study has illustrated that noncompliance with the art, open pit mining standards and early planning of the mining method can most often lead to critical situations and catastrophic results. The back analysis of the slip site allowed us to reconstruct the break already observed and to draw maximum lessons on the mode, location and mechanical parameters that triggered this break.

Application of electrical tomography technique for landslide investigation: Case of the Kef Essenoun phosphate deposit, Djebel Onk (Northeastern Algeria)

“…The analysis of the geophysical profile (Figure 6) have confirmed the presence of cracks in the depth https://doi.org/10.2205/2023ES000830 ES2007 Figure 3: Geological section of Kef Essenoun deposit before (A) and after sliding (B) [Fredj et al, 2020]. The surface alluvial layer overlies a significant thicker one of marl, where cracks become less detectable by resistivity, probably due to the nature of the rock.…”

Impact of Natural Radioactivity (Uranium, Thorium and Potassium) and Toxic Heavy Metals Contents in Water and Sediments from North Africa Dams (Algeria and Tunisia): Geochemical Behavior and Environmental Implications

“…It is the cumulative impact on the water and on the soil. These higher values are mainly recorded in specific areas such as the cities of Tebessa, Souk Ahras, Annaba, Jendouba, El Kef, and Beja, which are associated with the mining and ore industry and also with the presence of the diapiric and the metamorphic rocks in the high altitude (1,500 -2,800 m) [18,19,20,21,22].…”

Optimizing the blast fragmentation quality of discontinuous rock mass: Case study of Jebel Bouzegza Open-Cast Mine, North Algeria

“…By understanding the effects of discontinuities, mining operations can reduce production costs, optimize mining processes, and enhance productivity [20], [21]. Previous studies, such as those conducted by Akbari [22] and Souza et al [23], have demonstrated the significance of discontinuities in optimizing mining processes, highlighting their influence on blast energy and the distribution of blast results.…”