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PHYSICS OF ROCKS AND PROCESSES
ArticleName Rock mass geodynamics and mining-induced rockbursting at Nikolaev complex deposit
DOI 10.17580/gzh.2016.12.03
ArticleAuthor Rasskazov I. Yu, Saksin B. G., Usikov V. I., Potapchuk M. I.
ArticleAuthorData

Institute of mining of far Eastern branch of the Russian Academy of Sciences, Khabarovsk, Russia:

I. Yu. Rasskazov, Director, Doctor of Engineering Sciences, rasskazov@igd.khv.ru
B. G. Saksin, Chief Researcher, Doctor of Geologo-Mineralogical Sciences
V. I. Usikov, Senior Researcher, Candidate of Economic Sciences
M. I. Potapchuk, Senior Researcher, Candidate of Engineering Sciences

Abstract

The activation of induced seismicity at Nikolaev complex deposit in the East Primorye, Russia, required more comprehensive analysis of the regional tectonics and its influence on generation of natural-and-induced stress field. Based on the data of the Earth radar sounding, the map of morphology and structure of the Kavalerovo-Dalnegorsk metalliferous province displays features of the local tectonic cover and allows correlating tectonics and geodynamic events in this area. The analyses of factors that govern the rockburst hazard at the deposit show that more than a half of dyanmic events due to rock pressure, recorded withing the service life of Nikolaev Mine, occur close to the influence zone of structural geology and tectonics of the deposit, and round 25 % of the events are recorded in the zone of abutment pressure. In recent years, Nikolaev Mine suffers from increasingly frequent geodynamic events accompanied by seismic effects and considerable damage of underground openings. One of the main causes of the higher induced seismicity is morphological features of large limestone plate, being the primary discontinuity in the geological medium of the mine field, within which anomalously high acoustic activity zones are detected. The increased seismic and acoustic activity is also governed by the other rank faults at the bounds of higher order blocks. The increment in the number of hazardous dynamic events due to rock pressure at Nikolaev deposit is conditioned by the mining-induced disbalance of the nature-andtechnology system where the governing part belongs to the central block of stenoliths laterally bounded by faults and dykes. Geodynamic processes run as restructuring and self-organization of rock mass inside the natural and mining-induced stress field and are accompanied by displacement and movement of rock mass blocks along different-scale tectonic faults.
This study has been supported by the Russian Science Foundation, Grant No. 16-17-00018. The authors appreciate contribution of S. P. Osadchiy and V. V. Popov, Dalpolimetall Mining and Metallurgy Plant, and V. D. Baryshnikov, Institute of Mining, SB RAS, Novosibirsk, Russia, to this study.

keywords Geodynamics, tectonic structure, stress state, rocks mass, rock bursts, induced seismicity, seismoacoustic activity
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