Potential rockburst hazard on lower levels of the Shanuch deposit

Authors: Aynbinder I. I., Ovcharenko O. V., Patskevich P. G.

The geological structure, physical and mechanical properties as well as variation in the stress–strain behavior of rock mass in the course of extraction of copper–nickel sulfide ore reserves from the bottom of opencast mine by the underground method at the Shanuch deposit is analyzed in order to access and mine lower level reserves (depth to 500 m below ground surface). Rockbursthazardous enclosing rocks (bastard granite and gabbro) are identified. Considering the initial gravitational–tectonic stress field, with principal subhorizontal stresses higher than the gravitational stresses, the mathematical modeling of the stress–strain behavior in rock mass in the course of mining with sublevel caving under an ore cushion is performed. It is shown that in the give conditions, the vertical loads on rock mass in the zone of underground mining are low, and the local geomechanical situation is exclusively governed by the horizontal component of the natural stress field. During mining operations at the depth to 500 m, the maximal stresses in rockburst-hazardous rock mass are not higher than 0.4 of their uniaxial compression strength. No rockurst hazard is detected in the deposit down to the depth of 500 m below ground surface, and no dynamic phenomena of rock pressure are predicted. It is concluded that the Shanuch deposit rock mass to the depth of 500 m below ground surface, given adhesion to the project technology of mining with sublevel caving under an ore cushion is rockburst-nonhazardous.

Keywords: Rock bursts, rockburst hazard of mineral deposit, stress–strain behavior, rock mass, hybrid geotechnology, mining system, sublevel caving under ore cushion.
For citation:

Aynbinder I. I., Ovcharenko O. V., Patskevich P. G. Potential rockburst hazard on lower levels of the Shanuch deposit. MIAB. Mining Inf. Anal. Bull. 2019;(12):30-40. [In Russ]. DOI: 10.25018/0236-1493-2019-12-0-30-40.

Acknowledgements:
Issue number: 12
Year: 2019
Page number: 30-40
ISBN: 0236-1493
UDK: 622.272:622.274
DOI: 10.25018/0236-1493-2019-12-0-30-40
Article receipt date: 01.11.2019
Date of review receipt: 06.11.2019
Date of the editorial board′s decision on the article′s publishing: 10.11.2019
About authors:

I.I. Aynbinder1, Dr. Sci. (Eng.), Professor, Head of Department,
e-mail: geoexpert@yandex.ru,
O.V. Ovcharenko1, Cand. Sci. (Eng.), Senior Researcher,
e-mail: geoexpert@yandex.ru,
P.G. Patskevich1, Cand. Sci. (Eng.), Senior Researcher,
e-mail: ppg1975@hotmail.ru
1 Institute of Problems of Comprehensive Exploitation of Mineral Resources
of Russian Academy of Sciences, 111020, Moscow, Russia

For contacts:

O.V. Ovcharenko, e-mail: geoexpert@yandex.ru.

Bibliography:

 1. Kungurova V. E., Trukhin Yu. P., Aliskerov A. A. Structural, textural and mineralogical features of oxidation zone in ore body No. 1 of the Shanuch deposit, Kamchatka Peninsula. Gornyy informatsionno-analiticheskiy byulleten’. 2016, no S31, pp. 56—71. [In Russ].
2. Trukhin Yu. P., Stepanov V. A., Sidorov M. D., Kungurova V. E. Shanuch copper–nickel deposit: geological-and-geophysical model, composition and geochemistry. Rudy i metally. 2009, no 5, pp. 75—81. [In Russ].
3. Dyudin Yu. K., Denisov M. E., Fursov E. G., Tsibul'ko V. V. Project of access and mining of the Shanuch copper–nickel deposit. Gornyy zhurnal. 2008, no 6, pp. 52—55. [In Russ].
4. Kaplunov D. R., Ryl'nikova M. V. Geomechanical and geotechnical features of transition from opencast to underground mining at great depths. Gornyy informatsionno-analiticheskiy byulleten’. 2015, no S56, pp. 67—79. [In Russ].
5. Kaplunov D. R., Ryl'nikova M. V. Planning formation and development of geotechnical systems in hybrid geotechnology. Gornyy informatsionno-analiticheskiy byulleten’. 2015, no S45-1, pp. 229—240. [In Russ].
6. Zehirov S., Kaykov D., Koprev I. А review of combining open-pit and underground mining methods around the world. Journal of Mining and Geological Sciences. 2017;60:17—20.
7. Olavarria S., Adriasola P., Karzulovic A. Transition from open pit to underground mining at Chuquicamata, Antofagasta, Chile. International Symposium on Stability of Rock Slopes in Open Pit Mining and Civil Engineering. Cape Town, South Africa, 3—6 April 2006. The South African Institute of Mining and Metallurgy, 2006.
8. Federal'nye normy i pravila v oblasti promyshlennoy bezopasnosti «Polozhenie po bezopasnomu vedeniyu gornykh rabot na mestorozhdeniyakh, sklonnykh i opasnykh po gornym udaram». Prikaz Rostekhnadzora ot 02.12.2013 № 576. Zaregistrirovano v Minyuste Rossii 04.04.2014 № 31822 [Federal Industry Safety Code: Regulations on safe mining at rockbursthazardous mineral deposits. Rostekhnadzor Order No. 576 as of Dec 12, 2013. Registered in Ministry of Justice of Russia 04.04.2014 No. 31822]. [In Russ].
9. Ovcharenko O. V., Aynbinder I. I., Patskevich P. G. Rockburst hazard at the Moroshka deposit under mining with backfill. Gornyy informatsionno-analiticheskiy byulleten’. 2018, no 8, pp. 5—15. DOI: 10.25018/0236-1493-2018-8-0-5-15. [In Russ].
10. Petukhov I. M., Lin'kov A. M. Mekhanika gornykh udarov i vybrosov [Mechanics of rock bursts and outbursts], Moscow, Nedra, 1983.
11. Stavrogin A. N., Protosenya A. G. Prochnost' gornykh porod i ustoychivost' vyrabotok na bol'shikh glubinakh [Strength of rocks and stability of excavations at great depths], Moscow, Nedra, 1985.
12. Zamesov N. F., Aynbinder I. I., Burtsev L. I., Rodionov Yu. I., Ovcharenko O. V., Arshavskiy V. V. Razvitie intensivnykh metodov dobychi rud na bol'shikh glubinakh [Intensive methods for deep-level ore mining], Moscow, IPKON AN SSSR, 1990.
13. Zamesov N. F., Aynbinder I. I. Gornye udary i strategiya razrabotki rudnykh mestorozhdeniy na bol'shikh glubinakh [Rock bursts and deep-level ore mining strategy], Moscow, IPKON AN SSSR, 1984.
14. Jalbout A., Simser B. Rock mechanics tools for mining in high stress ground conditions at Nickel Rim South Mine. Proceedings of the Seventh International Conference on Deep and High Stress Mining, Australian Centre for Geomechanics, 2014.
15. Seccombe K. R. Numerical modeling of mining subsidence. Bachelor Thesis. 2014.
16. Zienkiewicz O. C., Taylor R. L., Fox D. D. The finite element method for solid and structural mechanics. Oxford: Butterworth—Heinemann, 2013. 672 p.
17. ANSYS Release 11.0. Documentation. Structural Analysis Guide. December 2006.

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