Prediction of strains in strong rock mass of the Kurzhunkul open pit mine by the kinematic analysis

The Kurzhunkul magnetite ore deposit is located in the Kostanai region of Kazakhstan. The deposit has been in operation by the Kurzhunkul open pit mine by SSGPO since 1983. The current elevation of the open pit is minus 28 m (depth of 240 m). It is planned to increase the depth of the open pit down to the absolute elevation of minus 290 m. To this effect, the research into the basic actual characteristics of rock mass and their influence on the rock mass stability was undertaken. The governing factor of strains in the Kurzhunkul pit wall is structural geology as the deposit features a complex combination of tectonic structures. The article presents the estimate of the rock mass structure affecting stability of the Kurzhunkul pit walls using the kinematic analysis. The design of benches and slopes in the Kurzhunkul open pit was analyzed relative to the systems of joints revealed in the rock mss. Potentially unstable zones in the pit wall rock mass were identified based on the jointing measurement data obtained during documenting of oriented core from sample boring. The failure modes and potential strain levels of the pit wall slopes were estimated using the methods of the numerical analysis.

Keywords: open pit mine, rock mass jointing, joint systems, kinematic analysis, slope stability, strains, bench, failure.
For citation:

Berdinova N. O., Sedina S.A., Shamganova L. S., Kalyuzhny E. S. Prediction of strains in strong rock mass of the Kurzhunkul open pit mine by the kinematic analysis. MIAB. Mining Inf. Anal. Bull. 2020;(4):58-68. [In Russ]. DOI: 10.25018/0236-1493-2020-4-0-58-68.

Acknowledgements:
Issue number: 4
Year: 2020
Page number: 58-68
ISBN: 0236-1493
UDK: 622.271
DOI: 10.25018/0236-1493-2020-4-0-58-68
Article receipt date: 13.01.2020
Date of review receipt: 11.02.2020
Date of the editorial board′s decision on the article′s publishing: 20.03.2020
About authors:

N.O. Berdinova1, Researcher,
S.A. Sedina1, PhD, Acting Head of Laboratory, e-mail: igd.ogm@gmail.ru,
L.S. Shamganova1, Dr. Sci. (Eng.), Deputy Director for Research,
E.S. Kalyuzhny, Head of the Department of Technical Development and Technology, Sokolov-Sarbai Mining Production Association (SSGPO), Rudny, Kazakhstan,
1 D.A. Kunaev Mining Institute, 050046, Almaty, Kazakhstan.

For contacts:

S.A. Sedina, e-mail: igd.ogm@gmail.ru.

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