Collected Item: “Failure Estimation of the Majdanpek Open Pit East Face Based on Inverse Velocity Model”
Врста публикације
Рад у зборнику
Верзија документа
објављена
Језик
српски
Аутор/и (Милан Марковић, Никола Николић)
Miloš Marjanović, Stefan Milanović, Nikola Simić, Lazar Kričak
Наслов рада (Наслов - поднаслов)
Failure Estimation of the Majdanpek Open Pit East Face Based on Inverse Velocity Model
Назив конференције (зборника), место и датум одржавања
Regional Symposium on Landslides in the Adriatic-Balkan Region
Издавач (Београд : Просвета)
University of Belgrade, Faculty of Mining and Geology
Година издавања
2024
Сажетак рада на енглеском језику
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.
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.
Почетна страна рада
303
Завршна страна рада
307
DOI број
10.18485/resylab.2024.6.ch46
ISBN број изворне публикације
9788673524023
Кључне речи на енглеском (одвојене знаком ", ")
displacement, survey, inverse velocity, open pit
Линк
http://dx.doi.org/10.18485/resylab.2024.6.ch46
Шира категорија рада према правилнику МПНТ
М30
Ужа категорија рада према правилнику МПНТ
М33
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