Transbaikal State University, Chita, Russia:

G. G. Pirogov, Professor, Doctor of Engineering Sciences, pirogov.chita@mail.ru
V. E. Podoprigora, Associate Professor

The mining technology with ore shrinkage has significant advantages: the stored ore serves as a working platform and a means of support for the mined-out space during block breaking. At the same time, this technology is characterized by low productivity of face workers and by a high percentage of manual labor reaching 50%. This article proposes a technology with mechanization of the main and auxiliary processes of stoping using a system of self-propelled machines, for which a patent of the Russian Federation has been obtained. Self-propelled machines enter the stoping space via a ramp with accesses to layers to be blasted in footwall rock mass. The stored ore is compacted under the influence of its own gravity, weight of the self-propelled machines on its surface, and due to the convergence of the sides of the block, especially in thin ore body mining, which negatively affects the completeness of ore drawing. It is proposed to expand the end sections of loading exits by cutting the footwall rocks at an angle of 55–600 deg to the walls and roof of the exits. To increase the efficiency of top ore caving, it is proposed to cave the crown pillars toward the stored ore. In thin ore body mining, in order to obtain a standard width of the stoping space, drilling and blasting embraces barren rocks, which is accompanied by an increase in dilution, and, consequently, by a deterioration in economic indicators. It is recommended to use small-sized self-propelled machines. The performed comparative technical and economic assessment allows concluding that it is expedient to consider the proposed stoping technology as an alternative solution to the effective mining of lodes.

1. Trushkov N. I. Development of ore deposits : Underground mining. Moscow : Metallurgizdat, 1947. 548 p.
2. Kaplunov D. R., Pomelnikov I. I., Levin V. I. Integrated ore mining : Underground mining panning and technology. Moscow : IPKON RAN, 1998. 383 p.
3. Kursakin G. A. Development of underground mining technology for gold ore deposits in the Russian Far East : Theses of Dissertation of Doctor of Engineering Sciences. Khabarovsk, 2000. 43 p.
4. Pirogov G. G. Method for developing steeply dipping ore bodies. Patent RF, No. 2781002. Applied: 13.12.2021. Published: 04.10.2022. Bulletin No. 28.
5. Pirogov G. G. New technology of sewage pit low-power steep lived a solid story stockpiling of ore. Vestnik Chitinskogo gosudarstvennogo universiteta. 2011. No. 8(75). pp. 104–109.
6. Imenitov V. R. Underground ore mining processes : Tutorial. 3^rd revised and enlarged edition. Moscow : Nedra, 1984. 504 p.
7. Lomonosov G. G. Industrial processes of underground ore deposit mining. 2^nd ed. Moscow : Gornaya kniga, 2013. 518 p.
8. Pirogov G. G., Kozlova I. M. Interaction of side rocks and broken ore subjected to shrinkage. GIAB. 2021. No. 3-2. pp. 118–124.
9. Mamsurov L. A., Nikulichev V. I., Kuzmin M. I., Gavrilina L. B. An effective technology for lode ore mining using small-sized self-propelled machines. Parameters ad Indicators of Lode Ore Mining Efficiency : Collected Book. Moscow : IPKON AN SSSR, 1983. pp. 37–55.
10. Оganesyan A. G., Alaverdyan G. A., Agabalyan Yu. A., Tepanosyan G. O. Substantiation of the application field of haulage techniques during mining of thin ore bodies. Gornyi Zhurnal. 2013. No. 12. pp. 45–47.
11. Pimentel B. S., Gonzalez E. S., Barbosa G. N. O. Decision-suppor t models for sustainable mining networks: fundamentals and challenges. Journal of Cleaner Production. 2016. Vol. 112. pp. 2145–2157.
12. Doifode S. K., Matani A. G. Effective Industrial Waste Utilization Technologies towards Cleaner Environment. International Journal of Chemical and Physical Sciences. 2015. Vol. 4, Special  Issue. pp. 536–540.

13. Malatse M., Ndlovu S. The viability of using the Witwatersrand gold mine tailings for brickmaking. Journal of the Southern African Institute of Mining and Metallurgy. 2015. Vol. 115, Iss. 4. pp. 321–327.
14. Raimzhanov B. R., Mukhitdinov А. Т., Bekmurzaev B. B., Khasanov A. R. Evaluation and selection of deeper level ore mining systems for Zarmitan mine. GIAB. 2018. No. 1. pp. 41–49.
15. Rogiznyi V. F., Khromov V. M. Selective mining of thin orebodies with use compact selfpropelled underground equipment. Ratsionalnoe osvoenie nedr. 2019. No. 2-3. pp. 88–98.
16. Egemberdiev R. I., Volkov Yu. A. Justification of mining technology and its parameters for thin and steeply dipping ore bodies (lodes). GIAB. 2019. No. 10. pp. 22–34.
17. Sokolov I. V., Smirnov A. A., Antipin Yu. G., Baranovskii K. V., Nikitin I. V. et al. Peculiarities of underground mining of Vetrensky gold mine. Izvestiya vuzov. Gornyi zhurnal. 2018. No. 4. pp. 12–22.
18. Bitimbaev M. Zh., Kalybekov T., Rysbekov K. B., Soltabaeva S. T. Control of standards for accessed, prepared and ready for extraction reserves and ore quality in underground mining. Gornyi zhurnal Kazakhstana. 2018. No. 7. pp. 16–21.
19. Akbarov T. G., Urazov Zh. D., Nishanov A. Sh. Rational technology of underground mining of ore bodies of the Kochbulak deposit with uneven mineralization. Universum: tekhnicheskie nauki. 2021. No. 12-3(93). pp. 5–8.
20. Akbarov T. G., Urazov J. D., Nishanov A. Sh., Ashirov Yu. N. Features of Underground Mining of the Kochbulak Gold Ore Deposit. International Journal of Innovative Science and Research Technology. 2021. Vol. 6, Iss. 12. pp. 904–907.
21. Raimzhanov B. R., Khakimov Sh. I., Khamzayev S. A. Sublevel Mining System with Artificial Pillars Made of a Hardening Backfills for the Development of Veins in Difficult Geomechanical Conditions. Texas Journal of Multidisciplinary Studies. 2021. Vol. 3. pp. 98–104.
22. Shakarov B., Khasanov O. A., Gaibnazarov B. A., Alimov Sh. M. Experience in Improving Residential Deposits with Ore Shrinkage. International Journal of Advanced Research in Science, Engineering and Technology. 2019. Vol. 6, Iss. 12. pp. 11973–11977.