Process borehole drilling using air-percussion drill rigs in open pit mines of EVRAZ KGOK

The article discusses the problem connected with different drilling rates and drill bit lives in different areas of open pit mine fields or in deposits having similar geological conditions. The time-studies of process borehole drilling using air-percussion drill rigs in open pit mines of EVRAZ KGOK are presented. It is shown that drilling rate is lower while drill bit wear is higher in open pit at Sobstvenno-Kachkanar deposit (SKD) than in Glavny open pit. For feasibility study of drilling conditions, the comparative analysis of geology, structure, mineralogy and mechanical properties of rock mass at SKD and Gusevogorskoe deposit is performed. The main factors which decrease air-percussion drilling rate and reduce drill bit wear resistance in SKD open pit are determined. The main cause of decrease in the drilling rate in SKD open pit as compared with the drilling rate in Glavny open pit is the lower level of jointing in rock mass. The rest influences are ranked according to their significance as: nonuniformity (diversity) of mineralogical composition in Glavny open pit and dominance of fine-grained pyroxenite in SKD open pit, with higher abrasion strength and higher content of Fe, V2O5 and TiO2 as against Glavny open pit. The research results allow justifying capacity of air-percussion drill rigs and rating requirement of drill bits.

Yakovlev A. V., Shimkiv E. S., Perekhod T. M. Process borehole drilling using air-percussion drill rigs in open pit mines of EVRAZ KGOK. MIAB. Mining Inf. Anal. Bull. 2022;(5):121-130. [In Russ]. DOI: 10.25018/0236_1493_2022_5_0_121.

The study was carried out under State Contract No. 075-00412-22 PR. Topic 1 (2022-2024): Methodology of the Integrated Solid Mineral Mining Strategy in the Geotechnology Development Dynamics (FUWE-2022-0005), Registration No. 1021062010531-8-1.5.1.

A.V. Yakovlev¹, Cand. Sci. (Eng.), Head of Sector, e-mail: lubk_igd@mail.ru, ORCID ID: 0000-0002-0009-9894,
E.S. Shimkiv¹, Researcher, e-mail: ekaterina-busargina@yandex.ru, ORCID ID: 0000-0001-8040-1354,
T.M. Perekhod¹, Leading Engineer, e-mail: ztm1953@mail.ru,
¹ Institute of Mining, Ural Branch of Russian Academy of Sciences, 620075, Ekaterinburg, Russia.

A.V. Yakovlev, e-mail: lubk_igd@mail.ru.

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