Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia:

A. A. Eremenko, Chief Researcher, Professor, Doctor of Engineering Sciences, eremenko@ngs.ru

Mining Assets Division, EVRAZ ZSMK, Novokuznetsk, Russia:

A. G. Gavrilov, Chief Engineer
V. A. Shtirts, Deputy Chief Engineer

Siberian State University of Geosystems and Technologies, Novosibirsk, Russia:

V. S. Pisarev, Associate Professor, Candidate of Engineering Sciences

Sheregesh Mine extracts ore reserves at the Levels of +255 ÷ +115 m in four sites at the depths of 470–700 m and deeper and produces annually more than 4.5 Mt of ore. The upper ore edge in Podruslovy site is spaced at 290–320 m from ground surface. The major ore reserves occur within the depth interval from 300 to 700 m below ground surface. Enclosing rock mass is composed of limestone, porphyry, skarn and other rocks which belong to stability class II. Considering the physical and mechanical properties of ore and enclosing rocks, the effective stresses and the geodynamic phenomena observable beneath the Level of +255 m, Sheregesh Mine operates in the rockburst-hazardous conditions. The geomechanical behavior of a crown pillar between ground surface and mined-out void roof in mining the ore body in Podruslovy site under conditions of rockburst hazard is assessed. The influence of the room-and-pillar and subsoil caving variants on the roof of the mined-out void is shown. The mathematical modeling delineates the concentration zones of stresses and inelastic strains in adjacent enclosing rock mass. The sizes of the crown pillar are estimated experimentally using geophysical methods. The pillar thickness ranged 420 to 300 m, then, three boreholes drilled from ground surface showed the thickness variation in the range from 309 to 12.7 m. Using the gravimeter survey in combination with orthophotomap, the outlines of the underground void and the ground surface subsidence are determined. The configuration layouts of holes for dry rock backfill by-pass for filling the void in Podruslovy site are presented.

1. Eremenko A. A., Filippov V. N., Nikitenko S. M., Khristolyubov E. A. Specific Features of Iron Ore Mining in Gornaya Shoria. Journal of Mining Science. 2017. Vol. 53, Iss. 5. pp. 868–881.
2. Eremenko A. A., Shaposhnik Yu. N., Filippov V. N., Konurin A. I. Development of scientific framework for safe and efficient geotechnology for rockburst-hazardous mineral deposits in Western Siberia and the Far North. Gornyi Zhurnal. 2019. No. 10. pp. 33–39. DOI: 10.17580/gzh.2019.10.03
3. Eremenko A. A., Eremenko V. A., Gaidin A. P. Geological and geomechanical conditions of iron ore mining in the Altai-Sayan folded zone. Novosibirsk : Nauka. 2009. 224 p.
4. Kalugin A. S., Kalugina T. S., Ivanov V. I. et al. Iron ore deposits in Siberia. Novosibirsk : Nauka, 1981. 238 p.
5. Kuznetsov V. A. Tectonic zoning and features of endogenous metallogenic occurrence in Gorny Altai. Gorny Altai : Geology and metallogeny. Novosibirsk : IGG SO AN SSSR, 1963. Vol. 13.
6. Smirnov V. I. (Ed.). Ore deposits of the USSR. 2^nd revised and enlarged edition. Moscow : Nedra, 1978. Vol. 1. 352 p.
7. Kononov A. N., Shrepp B. V., Kononov O. A., Nikitin V. N., Krylova O. A. Appearance of pulsation of horizontal effort in mining rocks of iron-ore deposits at south Siberia. Gornyi Zhurnal. 1995. No. 8. pp. 9–11.
8. Kurlenya M. V., Eremenko А. А., Shrepp B. V. Geomechanical issues of development of Siberia`s iron ore deposits. Novosibirsk : Nauka, 2001. 184 p.
9. Guidelines on safe mining at rockburst-hazardous Sheregesh deposit. Novosibirsk–Novokuznetsk, 2021. 65 p.
10. Khademian Z., Ugur O. Computational framework for simulating rock burst in shear and compression. International Journal of Rock Mechanics and Mining Sciences. 2018. Vol. 110. pp. 279–290.
11. Xia-Ting Feng, Jianpo Liu, Bingrui Chen, Yaxun Xiao, Guangliang Feng et al. Monitoring, Warning, and Control of Rockburst in Deep Metal Mines. Engineering. 2017. Vol. 3, Iss. 4. pp. 538–545.
12. Anderso n N. G. Information as a physical quantity. Information Sciences. 2017. Vol. 415-416. pp. 397–413.
13. Yang Yu, Ka-zhong Deng, Yi Luo, Shen-en Chen, Hui-fu Zhuang. An improved method for long-term stability evaluation of strip mining and pillar design. International Journal of Rock Mechanics and Mining Sciences. 2018. Vol. 107. pp. 25–30.
14. Kocharyan G. G., Zolotukhin S. R., Kalinin E. V., Panasyan L. L., Spungin V. G. Stress–Strain State of Rock Mass in th e Zone of Tectonic Fractures in the Korobkov Iron Ore Deposit. Journal of Mining Science. 2018. Vol. 54, Iss. 1. pp. 13–20.
15. Kropotkin P. N. Stress testing results in rocks in Scandinavia, Western Europe, Island, Africa and Northern America. Moscow : Nauka, 1973. 188 p.

16. Production procedures 1337/14. Extraction of iron ore reserves from Sheregesh deposit within the limits of the safety pillar of the Bolshoi Unzas River in Podruslovy site. Yekaterinburg, 2014.
17. GKINP-5. Manual on engineering reporting on geodesy, astronomy, gravimeter and topography surveys. 3rd ed. Moscow : Nedra, 1971. 138 p.
18. Regulations on installation of centers and plugs of geodetic and leveling networks. Moscow : Kartgeotsentr – Geodezizdat, 1993. 104 p.
19. Safety Rules PTB-88. Safety in topography and geodesy surveys. Moscow : Nedra, 1991. 303 p.
20. GKINP-02-033-82. Manual on topographical surveying at the scales of 1:5000, 1:2000, 1:1000 and 1:500. Moscow : Nedra, 1982. 98 p.
21. Regulations on fixating centers of beacons in satellite geodesy. Moscow : TsNIIGAiK, 2001. 30 p.
22. GKINP (GNTA)–04-0122-88. Manual of high-precision national gravimetric network deployment in Russia. 3rd revised and enlarged edition. Moscow : TsNIIGAiK, 2004. 220 p.