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

Author

Listed:
  • Izabela-Maria Apostu

    (Department of Environmental Engineering and Geology, Faculty of Mining, University of Petrosani, Petrosani 332006, Romania)

  • Maria Lazar

    (Department of Environmental Engineering and Geology, Faculty of Mining, University of Petrosani, Petrosani 332006, Romania)

  • Florin Faur

    (Department of Environmental Engineering and Geology, Faculty of Mining, University of Petrosani, Petrosani 332006, Romania)

Abstract

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

Suggested Citation

  • Izabela-Maria Apostu & Maria Lazar & Florin Faur, 2021. "A Suggested Methodology for Assessing the Failure Risk of the Final Slopes of Former Open-Pits in Case of Flooding," Sustainability, MDPI, vol. 13(12), pages 1-27, June.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:12:p:6919-:d:578024
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    References listed on IDEAS

    as
    1. Sonja Kivinen, 2017. "Sustainable Post-Mining Land Use: Are Closed Metal Mines Abandoned or Re-Used Space?," Sustainability, MDPI, vol. 9(10), pages 1-18, September.
    2. Izabela-Maria Apostu & Maria Lazar & Florin Faur, 2020. "A Model to Evaluate the Flooding Opportunity and Sustainable Use of Former Open-Pits," Sustainability, MDPI, vol. 12(21), pages 1-20, November.
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