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ArticleName Features of rock mass geodynamics during large-scale blasting in rockburst-hazardous iron ore mining
DOI 10.17580/gzh.2024.01.08
ArticleAuthor Eremenko A. A., Konurin A. I., Shtirts V. A., Volkov A. V.

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

A. A. Eremenko, Chief Researcher, Professor, Doctor of Engineering Sciences,
A. I. Konurin, Senior Researcher, Candidate of Engineering Sciences


EVRAZ United West Siberian Metal Plant, Tashtagol, Russia
V. A. Shtirts, Deputy Chief Engineer for Rock Bursts at Mining Assets Subdivision


Global BVR LLC, Mytishchi, Russia
A. V. Volkov, CEO


At the present stage of development of the mining industry, drilling and blasting should guarantee high-quality fragmentation of rocks at the decreased dynamic impact on enclosing rock mass. With the transition of mining operations to the depths greater than 1000 m, the operating conditions of the iron ore deposits in Gornaya Shoria deteriorate sharply due to the geodynamic phenomena of varying intensity, especially during largescale blasting. The increase in the depth of solid mineral mining is accompanied by a natural increase in the initial stresses, initiation of geodynamic phenomena due to rock outbursts in mines and by impairment of ground control. After large-scale blasting, dynamic events induced by rock pressure are often observed, including an increase in the magnitude and energy class of the events and rock bursts. The purpose of this study is the safety of stoping operations with the decrease in the seismic energy of geodynamic phenomena during blasting. To this effect, the geodynamic situation during stoping within the test mine fields for the period of 2022 was analyzed, and the influence exerted by the location of blast sites, mass of explosives and delay intervals on the geodynamic behavior of ore bodies and enclosing rock mass was comprehensively studied. Based on the experimental research, the dependences of the magnitude of events and the energy class of shocks on the mass of explosive charges during blasting in different areas and at different depths at the Tashtagol and Sheregesh deposits were obtained, and the location of concentration zones and the energy of shocks in rock mass were determined.

keywords Rock, explosion, magnitude, energy class, shock, deposit, mine field, charge mass, explosive

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