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Dr. Maria Lazar
University of Petrosani

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Research Keywords & Expertise

0 Hydrogeology of mine
0 Reclamation & Ecological restoration
0 Mining and Environment
0 Slope stability analysis and monitoring
0 Mining dewatering

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Journal article
Published: 19 June 2021 in Sustainability
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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.

ACS Style

Izabela-Maria Apostu; Maria Lazar; Florin Faur. A Suggested Methodology for Assessing the Failure Risk of the Final Slopes of Former Open-Pits in Case of Flooding. Sustainability 2021, 13, 6919 .

AMA Style

Izabela-Maria Apostu, Maria Lazar, Florin Faur. A Suggested Methodology for Assessing the Failure Risk of the Final Slopes of Former Open-Pits in Case of Flooding. Sustainability. 2021; 13 (12):6919.

Chicago/Turabian Style

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 13, no. 12: 6919.

Journal article
Published: 08 November 2020 in Sustainability
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As a result of open-pit mining exploitations, impressive size gaps occur in the landscape. Their flooding leads to the occurrence of so-called open-pit lakes and represents an interesting way to reclaim and use sustainably the degraded land. In the literature, there are numerous plans, strategies, and guidelines for mine closure and open-pit recovery, but these are usually developed at the regional or national level and offer general suggestions, which must be evaluated and approached case-by-case. Because there is still no way to evaluate the opportunity of flooding the open-pits, a methodology for assessing this opportunity was developed to identify the open-pits that are suitable for flooding, this being the main objective of the paper. The paper is novel because of the multicriteria evaluation of open-pits and their remaining gaps, the logical succession of the criteria, and the proposed concept, methods, models, and equations that allow a complex assessment of the flooding opportunity. The methodology also aims to ensure maximum safety conditions in the former mining perimeter, the socio-economic and cultural requirements of local communities, the harmonization of the land in accordance with adjacent ecosystems, and the sustainable development of the region.

ACS Style

Izabela-Maria Apostu; Maria Lazar; Florin Faur. A Model to Evaluate the Flooding Opportunity and Sustainable Use of Former Open-Pits. Sustainability 2020, 12, 9275 .

AMA Style

Izabela-Maria Apostu, Maria Lazar, Florin Faur. A Model to Evaluate the Flooding Opportunity and Sustainable Use of Former Open-Pits. Sustainability. 2020; 12 (21):9275.

Chicago/Turabian Style

Izabela-Maria Apostu; Maria Lazar; Florin Faur. 2020. "A Model to Evaluate the Flooding Opportunity and Sustainable Use of Former Open-Pits." Sustainability 12, no. 21: 9275.

Journal article
Published: 01 January 2017 in Environmental Engineering and Management Journal
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ACS Style

Maria Lazar; Florin G. Faur; Emilia Dunca; Daniela-Ionela Ciolea. NEW METHODOLOGY FOR ESTABLISHING THE OPTIMAL REUSE ALTERNATIVE OF DEGRADED LANDS. Environmental Engineering and Management Journal 2017, 16, 1301 -1308.

AMA Style

Maria Lazar, Florin G. Faur, Emilia Dunca, Daniela-Ionela Ciolea. NEW METHODOLOGY FOR ESTABLISHING THE OPTIMAL REUSE ALTERNATIVE OF DEGRADED LANDS. Environmental Engineering and Management Journal. 2017; 16 (6):1301-1308.

Chicago/Turabian Style

Maria Lazar; Florin G. Faur; Emilia Dunca; Daniela-Ionela Ciolea. 2017. "NEW METHODOLOGY FOR ESTABLISHING THE OPTIMAL REUSE ALTERNATIVE OF DEGRADED LANDS." Environmental Engineering and Management Journal 16, no. 6: 1301-1308.

Journal article
Published: 01 January 2012 in Environmental Engineering and Management Journal
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ACS Style

Maria Lazar; Florin Faur; Emilia Dunca; Daniela Ciolea. LANDSLIDES OCCURRED IN BUJORASCU VALLEY DUMP AND STABILITY IMPROVEMENT SOLUTIONS. Environmental Engineering and Management Journal 2012, 11, 1361 -1366.

AMA Style

Maria Lazar, Florin Faur, Emilia Dunca, Daniela Ciolea. LANDSLIDES OCCURRED IN BUJORASCU VALLEY DUMP AND STABILITY IMPROVEMENT SOLUTIONS. Environmental Engineering and Management Journal. 2012; 11 (7):1361-1366.

Chicago/Turabian Style

Maria Lazar; Florin Faur; Emilia Dunca; Daniela Ciolea. 2012. "LANDSLIDES OCCURRED IN BUJORASCU VALLEY DUMP AND STABILITY IMPROVEMENT SOLUTIONS." Environmental Engineering and Management Journal 11, no. 7: 1361-1366.