Institute of Mining, Far Eastern Branch, Russian Academy of Sciences—Detached Division of the Khabarovsk Federal Research Center, Khabarovsk, Russia

A. Yu. Cheban, Leading Researcher, Candidate of Engineering Sciences, Associate Professor, chebanay@mail.ru

Many vein-type deposits of particularly valuable mineral raw materials are characterized by low thickness of ore bodies, complex bedding conditions and significantly uneven distribution of the useful component in ore, which predetermines a significant reduction in the quality of the extracted ore mass due to dilution and misgrading. It should be noted that ores of certain formation types are much more brittle compared to the host rocks, and therefore, during blasting, they are intensively crushed into small fractions enriched with a useful component. The author proposes a technological scheme that allows increasing the efficiency of underground development of vein-type deposits, the ores of which can be fractionated by size classes with concentration of the useful component in the ore fines. The technology provides the possibility of flexible management of the quality of the ore mass extracted from the subsoil by means of large-portion sorting and subsequent differentiated screening with the separation of productive fractions of various size classes, carried out on screens with screening surfaces for coarse, medium and fine screening, respectively. The selected productive fractions of ore are transported to the beneficiation plant, and the substandard fractions are transported to a special warehouse. The conducted experimental studies of a sample of poor tin ore showed a high variability in the content of the useful component with a significant enrichment of ore fines, in connection with which, by means of screening of poor ores, which make up a significant part of the considered excavation block, an additional volume of conditioned mineral raw materials can be obtained. The implementation of the proposed technological scheme will ensure an increase in the end-to-end extraction of metal and will increase the profitability of mining and processing production.

1. Gorbacheva V. D., Chmykhalova S. V. The quality control of copper–nickel ores of the Talnakh deposit. Gornyi Zhurnal. 2023. No. 6. pp. 68–72.
2. Nieto A., Muncher B. An applied economic assessment and value maximisation of a mining operation based on an iterative cut-off grade optimisation algorithm. International Journal of Mining and Mineral Engineering. 2021. Vol. 12, No. 4. pp. 309–326.
3. Sánchez F., Hartlieb P. Innovation in the mining industry: Technological trends and a case study of the challenges of disruptive innovation. Mining, Metallurgy & Exploration. 2020. Vol. 37, Iss. 5. pp. 1385–1399.
4. Ermoshkin N. N., Ermoshkin D. N., Kurmanaliev K. Z., Mansurov V. A. Ore dressing for the balance, mined and merchantable ores at the Jamgyr gold deposi. Gornaya Promyshlennost. 2023. No. 1. pp. 101–108.
5. Pavlov A. M., Vasilev D. S. Enhancing the efficiency of underground mining of steeply dipping fine veins. Gornaya Promyshlennost. 2017. No. 1. pp. 86–87.
6. Latyshev M. Z. Improvement of marketable ore quality in mining extremely thin veins. Kolyma. 1972. No. 6. pp. 30–31.
7. Trubetskoi K. N., Kaplunov D. R., Victorov S. D., Rylnikova M. V., Radchenko D. N. Scientific rationale of technologies for comprehensive resource-saving exploitation of strategic mineral resources. MIAB. 2014. No. 12. pp. 5–12.
8. Trubetskoi K. N., Zakharov V. N., Galchenko Yu. P. Nature-like and convergent technologies for developing lithosphere mineral resources. Herald of the Russian Academy of Sciences. 2020. Vol. 90, No. 3. pp. 332–337.
9. Rasskazova A. V., Sekisov A. G., Kirilchuk A. G., Vasyanovich Yu. A. Stage-activation leaching of oxidized copper–gold ore: Theory and technology. Eurasian Mining. 2020. No. 1. pp. 52–55.
10. Zhang Z.-X., Hou D.-F., Aladejare A., Ozoji T., Qiao Y. World mineral loss and possibility to increase ore recovery ratio in mining production. International Journal of Mining, Reclamation and Environment. 2021. Vol. 35, Iss. 9. pp. 670–691.
11. LaRoche-Boisvert M., Dimitrakopoulos R. An application of simultaneous stochastic optimization at a large open-pit gold mining complex under supply uncertainty. Minerals. 2021. Vol. 11, Iss. 2. ID 172.
12. Rasskazov I. Yu., Sekisov A. G., Cheban A. Yu. Enhancement of mining efficiency at structurally complex deposits with advanced extraction of very high-grade ore. MIAB. 2023. No. 4. pp. 5–19.
13. Robben C., Wotruba H. Sensor‐based ore sorting technology in mining—Past, present and future. Minerals. 2019. Vol. 9, Iss. 9. ID 523.
14. Lagov B. S., Lagov P. B. Radiometric Sorting and Separation of Solid Minerals : Tutorial. Moscow : MISiS, 2007. 155 p.
15. Temnov A. V., Tigunov L. P., Ryabkin V. K., Voevodin Yu. A., Bannikov V. F. et al. Improvement of the technology of processing of tungsten ores the Holtoson and Inkur deposits. Razvedka i okhrana nedr. 2013. No. 2. pp. 61–67.
16. Nazarchik A. F., Freydin A. M., Emelyanov V. I., Bovin A. A., Latyshev M. Z. et al. Investigation of inhomogeneity of industrial mineralization of vein deposits and its influence on development efficiency. Magadan : Knizhnoe izdatelstvo, 1976. 144 p.
17. Lomonosov G. G., Turtigina N. A. Influence of coarse-grained copper-nickel ore raw materials class and its changeability upon the benefication indication. MIAB. 2015. No. 3. pp. 104–107.
18. Sekisov G. V., Cheban A. Yu. Low-waste mining technology for structurally complex deposits with mixed-type process flows of ore extraction and processing. Journal of Mining Science. 2021. Vol. 57, No. 6. pp. 978–985.
19. Cheban A. Yu. Improvement of mining and processing flowsheets at vein-type gold deposits. Gornyi Zhurnal. 2024. No. 6. pp. 65–70.