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.

Bibliography:

1. Steysi P. Rukovodstvo po proektirovaniyu bortov kar'era [Pit wall design manual], Ekaterinburg, Pravoved: Polimetall, 2015, 528 p.

2. Xiao S., Gao Y. T., Wu S. C., Liu B., Tian Q. M. Kinematic analysis of slope failure modes based on stereographic projection. 4th International Conference on Civil, Architectural and Hydraulic Engineering, ICCAHE 2015, Guangzhou, China. Conference Paper, 2016.

3. Bawa H. E., Yendaw J.A., Kansake B.A., Bansah K. J. Rockmass characterization for open pit slope design using kinematic analysis. 51st U.S. Rock Mechanics/Geomechanics Symposium, 25—28. June, San Francisco, California, USA. Conference Paper, 2017.

4. Obregon C., Mitri H. Probabilistic approach for open pit bench slope stability analysis. A mine case study. International Journal of Mining Science and Technology. 2019. Vol. 29, No 4. Pp. 629—640. DOI: 10.1016/j.ijmst.2019.06.017.

5. Lephatsoe M. N., Hingston E. D. C., Ferentinou M., Lefu N. Kinematic analysis of the western pitwall of the main pit at the Letseng Daimond mine, Lesotho. EUROCK2014. Vigo, Spain, 27—29 May 2014. Rock Engineering and Rock Mechanics: Structures in and on Rock Masses. Conference Paper. 2014. DOI: 10.1201/b16955-105.

6. Rakishev B. R., Kuzmenko S. V., Sedina S.A., Tulebayev K. K. The analysis of influence of mining-geological factors on edges stability on the example of the Sarbai pit. Reports of the National academy of sciences of the Republic of Kazakhstan. 2018. No. 3, Pp. 133—140. [In Russ].

7. Burzunova Yu. P. Fractures in rocks nearby faults: features of application of structural paragenetic analysis. Geodinamika i tektonofizika. 2017. Vol. 8, no 3, pp. 673–693. [In Russ].

8. Yakovlev A. V. Geomechanical supervision of construction of pit walls and dumps. Problemy nedropol'zovaniya. 2016, no 4, pp. 75—80. [In Russ]. DOI: 10.18454/2313-1586.2016.04.075.

9. Bushkov V.K. Use of kinematic stability analysis in substantiation of basic wall design parameters for open pits. Gornyy informatsionno-analiticheskiy byulleten’. 2018, no 10, pp. 30–42. [In Russ]. DOI: 10.25018/0236-1493-2018-10-0-30-42.

10. Mukhametkaliev B. S., Kalyuzhnyy E. S., S"edina S.A., Abdibekov N. K. Geomechanical supervision of pit wall stability with increasing depth of mining. Gornyi Zhurnal. 2018, no 4, pp. 27—32. [In Russ]. DOI: 10.17580/gzh.2018.04.05.

11. Zhirov D., Rybin V., Klimov S., Melikhova G., Zav'yalov A. Integrated engineering–geological zoning aimed at justification of reinforcement/stabilization of pit wall slopes (part II). Inzhenernaya zashchita. 2014, no 3, pp. 16—25. [In Russ].

12. Yakovlev A. V., Shimkiv E. S. Analysis of influence exerted by basic joint sets in rock mass on the fragmentation quality of blasted rocks in the northern open pit mine of EVRAZ KGOK. Problemy nedropol'zovaniya. 2015, no 3(6), pp. 19—25. [In Russ].

13. Fisenko G. L. Ustoychivost' bortov kar'erov i otvalov. Izd. 2 [Slope stability of pit wall and dumps, 2nd edition], Moscow, Nedra, 1965, 378 p.

14. Mustafin M. G., Sannikova A. P., Yushmanov P. I. Slope stability estimation of pit walls. Zapiski Gornogo instituta. 2012. Vol. 198, pp. 198—201. [In Russ].

15. Stroitel'stvo v seysmicheskikh rayonakh. Normy proektirovaniya. SP 14.13330.2014 [Construction in seismic regions. Design standards SP 14.13330.2014], Moscow, 2014.

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