A Suggested Methodology for Assessing the Failure Risk of the Final Slopes of Former Open-Pits in Case of Flooding

Some valuable minerals, such as lignite, are extracted through open-pit mining works. After the cessation of activity, large-scale gaps result in landscape. These gaps, also called “remaining gaps”, represent some roughest types environmental impacts. recovery and ecological restoration works required. However, it is first necessary to carry out risk assessment studies considering possible future influences on final slopes. For this study, flooding remaining lignite open-pits was considered option. The study based extensive research, including sampling, laboratory tests, statistical-mathematical processing, hypothesis formulation, evaluations, interpretations, field observations, regarding rock behavior occurrence negative geotechnical phenomena (geotechnical that have a impact integrity environment local communities, landslides, rockfalls, liquefaction, suffosis) during process. This paper’s originality consists combining methods methodologies developed with help classic (Fellenius, Janbu, Bishop methods) probabilistic ones (Rosenblueth method) existing specialized literature for solving proposed problem structuring information similar guide.