Failure Estimation of the Majdanpek Open Pit East Face Based on Inverse Velocity Model

Објеката

Тип
Рад у зборнику
Верзија рада
објављена
Језик
engleski
Креатор
Miloš Marjanović, Stefan Milanović, Nikola Simić, Lazar Kričak
Извор
Regional Symposium on Landslides in the Adriatic-Balkan Region, Belgrade, 15-18th May 2024
Издавач
University of Belgrade, Faculty of Mining and Geology
Датум издавања
2024
Сажетак
The Majdanpek open pit mine south district is currently active mining prospect of copper ore exploitation in eastern Serbia. Its depth is approaching the
termination depth and occurrences of large-scale instabilities and global instability of the final pit slope is possible. These can generate catastrophic mass movement inside an area that encloses a regional road route and the
Pek River bed which is channelled along the outer contour of the pit. The displacements that were noted in early 2023, in the eastern face of the pit draw further concern and required a detailed monitoring campaign to be undertaken
quickly. It included several approaches, but in this work focus was on surveying on 5 static benchmarks through the period January-July 2023. Due to the unknown status of the displacement acceleration or deceleration on its progressive failure path, the inverse velocity calculation of the entire series was undertaken. The series involved surveying of benchmarks using the absolute coordinates measured manually by a total station every 4-5 days. Displacements trends indicated constant cumulative increment with different rates at different benchmarks with periods of acceleration and deceleration. Long-term trend suggests that steep part of the progressive failure curve is not reached. However, inverse velocity trend in most benchmarks suggests slight decrease, indicating possible global progressive failure. Other monitoring approaches confirmed only local failures, while limit equilibrium stability models suggest both, presence of local failures and marginally stable slopes with safety approaching one. Inverse velocities estimated failure by the end of 2023. Extensive precaution measures were undertaken to avoid such scenario, including constant early warning evacuation system, as well as immediate remediation measures on reshaping the slope.
почетак странице
303
крај странице
307
doi
10.18485/resylab.2024.6.ch46
isbn
978-86-7352-402-3
Subject
displacement, survey, inverse velocity, open pit
Шира категорија рада
М30
Ужа категорија рада
М33
Права
Отворени приступ
Лиценца
All rights reserved
Формат
.pdf

Miloš Marjanović, Stefan Milanović, Nikola Simić, Lazar Kričak. "Failure Estimation of the Majdanpek Open Pit East Face Based on Inverse Velocity Model" in Regional Symposium on Landslides in the Adriatic-Balkan Region, Belgrade, 15-18th May 2024, University of Belgrade, Faculty of Mining and Geology (2024). https://doi.org/10.18485/resylab.2024.6.ch46

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