Journals →  Gornyi Zhurnal →  2019 →  #10 →  Back

DEVELOPMENT OF DEPOSITS
ArticleName Increasing production capacity of an underground mine at deep levels
DOI 10.17580/gzh.2019.10.12
ArticleAuthor Lukichev S. V., Onuprienko V. S., Semenova I. E., Belogorodtsev O. V.
ArticleAuthorData

Mining Institute, Kola Science Center, Russian Academy of Sciences, Apatity, Russia:

S. V. Lukichev, Director, Doctor of Engineering Sciences
I. E. Semenova, Divisional Manager, Candidate of Engineering Sciences, innas@goi.kolasc.net.ru
O. V. Belogorodtsev, Researcher

Kirovsk Branch Apatit, Kirovsk, Russia:

V. S. Onuprienko, Chief Engineer

Abstract

The annual production capacity of the Kirovsk mine in the last decade has almost doubled and reached 18.5 million tons. But this is not the limit—the perspective plan for Apatit provides for its increase to 25 million tons, including 23.5 million tons of underground mining. In this regard, it becomes necessary to involve ore reserves located in more complicated mining conditions, which requires an integrated approach to solving problems in order to achieve the wanted rates of mining development. For the scientific substantiation of excavation and integrated solution of engineering problems, numerical simulation methods and modern software tools were used, allowing obtaining full-fledged digital models of underground and open geotechnologies. This approach is widely used in world practice. The Mining Institute, KSC RAS created original software products adaptable to specific tasks and conditions, namely:
– mining and geological information software MINEFRAME;
– software Sigma GT for 3-D finite element modelling of rock mass stress–strain state with regard to the main geological and geotechnical factors.
The alternate modeling of lower level mining in the Kirovsk mine and stress–strain analysis provided engineering solutions towards the increased production capacity from 18.5 to 25 million tons per year under conditions of reduced ore bodies thickness and the need to excavate some of reserves in the transition zones between open and underground mining, as well as near the thick and geodynamically active structure of the Saamsky fault. The optimal location of cuts and transition zones, as well as the transit order for the Saamsky fault were found. The parameters of the sublevel caving with advanced relaxation zone arranged in the hanging wall were determined. The value of the optimal angle of the stoping front relative to its advance is determined to ensure safety of mining. The proposed recommendations will be used in the mining project for the lower levels in the Kirovsk mine. The principles formulated for the safe mining during intensified ore extraction are also relevant in other cases of deep-level mining in hard rock masses subjected to high tectonic stresses.

keywords Deposits, underground mine, open pit, mining system, geodynamic risks, digital 3D modeling, stress-strain state, objects of geotechnology
References

1. Gurev A. A. Sustainable development of crude ore resources and benefication facilities of JSC «Apatit» based on best engineering solutions. Zapiski Gornogo instituta. 2017. Vol. 228. pp. 662–673.
2. Belousov V. V., Abrashitov A. Yu., Sakharov A. N. Deep-level mining of at the Khibiny apatite–nepheline ore deposit: State-of-the-art and prospects. Gornyi Zhurnal. 2014. No. 10. pp. 28–33.
3. Glubokii S. S. Adjusting the strategy of geological exploration of the Khibiny apatite–nepheline ore deposit in view of the deeper level mining buildup. Gornyi Zhurnal. 2014. No. 10. pp. 25–28.
4. Kozyrev A. A., Semenova I. E., Avetisian I. M., Zemtsovskii A. V. Methodological approaches and realization of joining zones mining in the rockburst hazardous conditions. Proceedings of the 16th International Multidisciplinary Scientific GeoConference. Albena, 2016. Book 1, Vol. 2. pp. 565–572.
5. Rybin V. V. Rock-mechanical reasons for mining jointed zones between open-pit and underground mines at working the apatite deposits in Khibiny. Problems of Mineral Mining and Underground Space Development in Northwestern Russia : Proceedings of International Conference devoted to the Russian Academy of Sciences 275th Anniversary. Apatity : KNTs RAN, 2001. Iss. 3. pp. 41–49.
6. Lukichev S., Belogorodtsev O., Amosov P. Improvement of a mining technology for near openpit reserves excavation in the northern conditions. Proceedings of the 17th International Multidisciplinary Scientific GeoConference. Albena, 2017. Vol. 17, Iss. 13. pp. 415–422.
7. Carlyle W. M., Eaves B. C. Underground Planning at Stillwater Mining Company. Interfaces. 2001. Vol. 31, No. 4. pp. 50–60.
8. Bayisa Regassa, Nengxiong Xu, Gang Mei. An equ ivalent discontinuous mode ling method of jointed rock masses for DEM simulation of mining-induced rock movements. International Journal of Rock Me chanics and Mining Sciences. 2018. Vol. 108. pp. 1–14.
9. Singh G. S. P., Singh U. K. A numerical modeling approach for assessment of progressive caving of strata and performance of hydraulic powered support in longwall workings. Computers and Geotechnics. 2009. Vol. 36, Iss. 7. pp. 1142–1156.
10. Hidalgo K. P., Nordlund E. Failure process analysis of spalli ng failure – Comparison of laboratory test and numerical modelling data. Tunnelling and Underground Space Technology. 2012. Vol. 32. pp. 66–77.
11. Pengzhi Pan, Xiating Feng. Numerical study on coupled thermo-mec hanical processes in Äspö Pillar Stability Experiment. Journal of Rock Mechanics and Geotechnical Engineering. 2013. Vol. 5, Iss. 2. pp. 136–144.
12. Lukichev S., Nagovitsyn О., Belogorodtsev O. A systemic approach to solving the mining technology tasks based on modeling its objects and processes. Application of Computers and Operations Research in the Mineral Industry : Proceedings of the 38th International Symposium. Colorado, 2017. pp. 29–34.
13. Belousov V. V., Osipenko A. V., Sakharov A. N. Tunnel support in Apatit deep mines under high rock pressure. Gornyi Zhurnal. 2014. No. 10. pp. 33–37.
14. Semenova I. E., Avetisyan I. M., Zemtsovskiy A. V. Geomechanical modeling of deep-level mining under difficult geological and geodynamic conditions. GIAB. 2018. No. 12. pp. 65–73.

Language of full-text russian
Full content Buy
Back