Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Footwall Rock Slope Stability Evaluations at Nchanga Open Pit Mine, Zambia
https://orcid.org/0000-0003-2639-9673
Abstract Footwall instability is still problematic in many base metal surface mines around the world. The current slope stability analyses by numerical simulation models uses estimated mechanical input parameters to investigate the evolution and failure process of the footwall. However, the estimated mechanical input parameters of the footwall slope in the numerical simulation models may lead to deceptive conclusions. In this article, to cushion the shortfalls of the numerical models, the mechanical input parameters for the footwall slope were adjusted to obtain the numerical simulation results that aligns well with the slope stability monitoring records at the time of footwall slope failure at Nchanga open pit. Then, the geotechnical conditions driving the footwall failure were investigated using the validated numerical simulation model. Thereafter, back analysis was carried according to the field slope displacement monitoring results to determine the mechanical parameters of the rock masses at the time of failure. Then the critical functional relationship between the shear strength parameters of the weak rock unit at the time of failure was established. Study results indicate that the validated numerical model provides more realistic predictions of evolution and failure process of the footwall. The established critical relationship between shear strength parameters of the weak rock unit could be useful to design effective remedial measures against footwall slope stability at Nchanga open pit.
Footwall Rock Slope Stability Evaluations at Nchanga Open Pit Mine, Zambia
https://orcid.org/0000-0003-2639-9673
Abstract Footwall instability is still problematic in many base metal surface mines around the world. The current slope stability analyses by numerical simulation models uses estimated mechanical input parameters to investigate the evolution and failure process of the footwall. However, the estimated mechanical input parameters of the footwall slope in the numerical simulation models may lead to deceptive conclusions. In this article, to cushion the shortfalls of the numerical models, the mechanical input parameters for the footwall slope were adjusted to obtain the numerical simulation results that aligns well with the slope stability monitoring records at the time of footwall slope failure at Nchanga open pit. Then, the geotechnical conditions driving the footwall failure were investigated using the validated numerical simulation model. Thereafter, back analysis was carried according to the field slope displacement monitoring results to determine the mechanical parameters of the rock masses at the time of failure. Then the critical functional relationship between the shear strength parameters of the weak rock unit at the time of failure was established. Study results indicate that the validated numerical model provides more realistic predictions of evolution and failure process of the footwall. The established critical relationship between shear strength parameters of the weak rock unit could be useful to design effective remedial measures against footwall slope stability at Nchanga open pit.
Footwall Rock Slope Stability Evaluations at Nchanga Open Pit Mine, Zambia
https://orcid.org/0000-0003-2639-9673
Abstract Footwall instability is still problematic in many base metal surface mines around the world. The current slope stability analyses by numerical simulation models uses estimated mechanical input parameters to investigate the evolution and failure process of the footwall. However, the estimated mechanical input parameters of the footwall slope in the numerical simulation models may lead to deceptive conclusions. In this article, to cushion the shortfalls of the numerical models, the mechanical input parameters for the footwall slope were adjusted to obtain the numerical simulation results that aligns well with the slope stability monitoring records at the time of footwall slope failure at Nchanga open pit. Then, the geotechnical conditions driving the footwall failure were investigated using the validated numerical simulation model. Thereafter, back analysis was carried according to the field slope displacement monitoring results to determine the mechanical parameters of the rock masses at the time of failure. Then the critical functional relationship between the shear strength parameters of the weak rock unit at the time of failure was established. Study results indicate that the validated numerical model provides more realistic predictions of evolution and failure process of the footwall. The established critical relationship between shear strength parameters of the weak rock unit could be useful to design effective remedial measures against footwall slope stability at Nchanga open pit.
Footwall Rock Slope Stability Evaluations at Nchanga Open Pit Mine, Zambia
Gong, Wenping (Autor:in) / Bowa, Victor Mwango (Autor:in) / Zhao, Chao (Autor:in) / Cheng, Zhan (Autor:in) / Zhang, Liang (Autor:in)
2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
BKL:
57.00$jBergbau: Allgemeines
/
38.58
Geomechanik
/
57.00
Bergbau: Allgemeines
/
56.20
Ingenieurgeologie, Bodenmechanik
/
38.58$jGeomechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
Energy Audit and Management : A case study of Konkola Copper Mines, Nchanga Mine-Zambia
| BASE | 2012
Feasibility study on global footwall stability at the Kiirunavaara mine
| BASE | 2012
Toe rock mass strength in footwall failures
| TIBKAT | 2020