Navoi State Mining Institute, Navoi, Uzbekistan:

Muminov R. O., Associate Professor, Doctor of Engineering Sciences

National University of Science and Technology—MISIS, Moscow, Russia:

Kuziev D. A., Associate Professor, Candidate of Engineering Sciences, da.kuziev@misis.ru
Zotov V. V., Associate Professor, Candidate of Engineering Sciences
Sazankova E. S., Associate Professor, Candidate of Engineering Sciences

The test subject is the electro-hydro-mechanical rotary-and-feed mechanism of roller-bit drill rigs with undermount rotary head. The goal of the research is the capacity stimulation, vibration reduction and reliability improvement of drill rig model SBSH-250MNA-32. The article describes the studies in the field of mining machines and the relevant engineering solutions. It is critical for Russia to preserve and replenish its mineral resources and mineral reserves to pursue social and economic advance. The priority growth of coal and gold production using the advanced open pit mining method can increase percentage of the latter in cumulative mineral mining by not less than 50%. Furthermore, it is necessary to cut down costs of production by 4–5%. The main and extremely labor consuming process in open pits in Russia is drilling which takes up to 40% of total mining cost [1–3]. The common method of drilling in rocks with the hardness factor of 6–20 on Protodyakonov’s scale in Russia is the roller-bit drilling [4–6]. This drilling processes is accompanied with high dynamic loading imposed on the rotary-and-feed mechanism [7–9]. One of the ways of reducing dynamic loads in the roller-bit drill rigs is redesigning of the rotary-and-feed mechanism to possess higher safety and anti-vibration properties, simpler structure, as well as better performability and longevity [7, 8, 10–13]. This article describes and substantiates the design and operating principle of the electro-hydro-mechanical rotary head, its prototype testing, the research program and procedure, the instrumentation preparation, the research objective as well as the test data processing and analysis as a case-study of drill rig model SBSH-250MNA-32.

1. Katanov B. A. Open pit drilling rigs. Vestnik KGGU. 2007. No. 5(63). pp. 5–8.
2. Martinov N. V., Chernih V. V., Fongrad Yu. K. Comparative feasibility study of the domestic and foreign manufacture drilling rigs in an operating open pit mine. Ural’s Mining School to Other Regions : International Conference Proceedings. Yekaterinburg : URSMU, 2020. pp. 256–257.
3. Anistratov K. Yu., Donchenko T. V., Opanasenko P. I. et al. Analysis of the market of drill rigs for surface mining operations of the Russian mineral producers. Gornaya promyshlennost. 2018. No. 2(138). pp. 84–89.
4. Ostrovsky M. S., Agamberdiev I. P. Inspection methods for technical state of drill rigs : Review. GIAB. 2007. No. 9. pp. 93–97.
5. Reshetnyak S. P., Samolazov A. B., Paladeeva N. I. Drilling and mine transport equipment for iron ore mines of Russia and CIS. Gornaya Promyshlennost. 2009. No. 5(87). pp. 18–29.
6. Malinovskii Yu. A., Uchitel A. D., Lyalyuk V. P. et al. The causes of vibration of the drilling tool during the operation of roller cone drilling machines. Ferrous Metallurgy. Bulletin of Scientific, Technical and Economical Information. 2020. Vol. 76, No. 9. pp. 897–904.
7. Yungmeister D. A., Krupenski I., Lavrenko S. A. Analysis of the options of modernization of roller-bit drilling machines with a submersible steamer. Journal of Mining Institute. Vol. 231. pp. 321–325.
8. Kuular O. O. Design of a hydraulic rotary feed mechanism with a drilling diameter of 200 mm. Vestnik Tuvinskogo gosudarstvennogo universiteta. Tehnicheskie i fiziko-matematicheskie nauki. 2020. No. 2(62). pp. 41–47.
9. Muminov R. O., Rayhanova G. E, Kuziev D. A. Experimental research and analysis of a quarry drilling rig. Ugol. 2021. No. 5. pp. 32–36.
10. Kantovich L. I., Poderni R. Y., Muminov R. O. The influence of the parameters of the rotary-feeding mechanism of the drilling rig on its productivity. GIAB. 2010. No. 11. pp. 396–399.
11. Poderni R. Y., Chromoy M. R., Prasolov S. K. Recuperative hydrostatic the drive feed system the drill rig. Nauchnyi vestnik Moskovskogo gosudarstvennogo universiteta. 2012. No. 10. pp. 75–85.

12. Shigin A. O. Adaptable rotary–feed mechanism of rock drilling machine for reduction of unpredictable loads in complicatedstructure rock drilling. Gornyi Zhurnal. 2013. No. 7. pp. 79–83.
13. Gromadskiy A. S., Gorbachev Yu. G., Gromadskiy V. A. Efficiency of quenching of dynamic loads damping efficiency by methods of damper stiffness minimization between the drilling rod and rotary drilling rig. GIAB. 2015. No. 7. pp. 158–161.
14. Rahimdel M. J., Ataei M., Ghodrati B. modeling and simulation approaches for reliability analysis of drilling machines. Journal of The Institution of Engineers (India). Series C. 2020. Vol. 101(1). pp. 125–133.
15. Kahraman S., Balci C., Yazici S. et al. Prediction of the penetration rate of rotary blast hole drills using a new drillability index. International Journal of Rock Mechanics and Mining Sciences. 2000. Vol. 37(5). pp. 729–743.
16. Kuziev D. A., Pyatova I. Yu., Klementieva I. N. et al. Algorithm for the determination of maximum feed drive power of drilling rigs in open pit mining. GIAB. 2019. No. 1. pp. 128–133.
17. Kahraman S. Performance analysis of drilling machines using rock modulus ratio. Journal-South African Institute of Mining and Metallurgy. 2003. Vol. 103, No. 8. pp. 515–522.
18. Buyalich G. D., Tatsienko V. P, Khusnutdinov M. K. Testing of roller tool for drilling blast holes of non-circular cross-section. Ugol. 2019. No. 7. pp. 15–18.
19. Buyalich G., Khusnutdinov M. Justification of the shape of a non-circular cross-section for drilling with a roller cutter. The IIND International Innovative Mining Symposium (Devoted to the Russian Federation Year of Environment) : E3S Web of Conferences. 2017. Vol. 21. DOI: 10.1051/e3sconf/20172103010
20. Gerike P. B. Some results of drilling rigs equipment diagnostics. Bulletin of Research Center for Safety in Coal Industry (Industrial Safety). 2018. No. 4. pp. 74–79.
21. Egamberdiev I. P., Atakulov L., Muminov R. O. et al. Research of vibration processes of bearing units of mining equipment. International Journal of Advanced Trends in Computer Science and Engineering. 2020. Vol. 9, No. 5. pp. 7789–7793.
22. Yassien M. A., Sayed M. A., Boghdady G. Y. et al. Experimental research into the effect of some operation factors and rock properties on the rate of penetration. Mining of Mineral Deposits. 2020. Vol. 14, Iss. 1. pp. 38–43.
23. Lakshminarayana C. R., Tripathi A. K., Pal S. K. Rock strength characterization using measurement while drilling technique. Indian Geotechnical Journal. Vol. 50, Iss. 2. pp. 994–1005.