The article presents the study outcome on determination of stress state in rock mass of Zapolyarny mine by the overcoring method. Orientation of principal stresses agrees with rock mass jointing and is found using geodynamic zoning maps and in-situ measurements of joint systems with subsequent processing of the data in geomechanical program Dips. From the results, the original the original stress field in Zapolyarny mine is connected with existing jointing, is gravitational in nature and described as σ1 > σ2 = σ3 at the horizontal/vertical stress ratio of 0.7. The major principal stress σ1 is oriented vertically, the intermediate principal stress σ2 is directed along the strike line of the Norilsk–Kharaelakh fault. Stoping causes additional load on selvage by the value 2.5 times higher than the original stresses. Having generalized the borehole data, it is possible to draw a conclusion that in the selvage, a mining-induced stress zone appears, with weighted mean vertical stress exceeding and with the horizontal/vertical stress ratio of 0.70. These results point at the gravity nature of the effective stresses. The average stress concentration factor obtained in the measurement process also agrees well with the stress patterns in Zapolyarny mine. According to the common laws, direction of the major principal stress can be determined using the rose diagrams of joint orientations. The joint planes in the rose diagrams are directed along the lines of the preliminary marked principal stresses. The main systems of joints were mapped using the geological field books and via direct measurement of jointing parameters by a dip compass.

For citation: Sergunin M. P., Eremenko V. A. Determining parameters of original stress field in rock mass in Zapolyarny mine. Gornyy informatsionno-analiticheskiy byulleten'. 2019;4:63-74. [In Russ]. DOI: 10.25018/0236-1493-2019-04-0-63-74.


Stresses, rock mass, overcoring method, jointing, geodynamic zoning, measurement borehole, program Dips.

Issue number: 4
Year: 2019
ISBN: 0236-1493
UDK: 622.272
DOI: 10.25018/0236-1493-2019-04-0-63-74
Authors: Sergunin M. P., Eremenko V. A.

About authors: M.P. Sergunin, Head of Department, Center for Geodynamic Safety, Polar Division of PJSC «MMC «Norilsk Nickel», Norilsk, Russia, V.A. Eremenko, Doctor of Technical Sciences, Professor of Russian Academy of Sciences, Director of the Research Center «Application of Geomechanics and Mining of Convergent Technologies», Mining Institute, National University of Science and Technology «MISiS», 119049, Moscow, Russia, e-mail: Corresponding author: V.A. Eremenko, e-mail:


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