Norilsk Nickel’s Polar Branch, Norilsk, Russia:

V. P. Marysyuk, Chief Geotechnical Engineer – Director of Center for Geodynamic Safety, Candidate of Engineering Sciences, marysyukvp@nornik.ru

Norilsk Nickel, Moscow, Russia:

G. V. Sabyanin, Head of Mining and Processing Office, Industrial Engineering Department, Candidate of Engineering Sciences

Center for Geomechanics and Mining Practice, Saint-Petersburg State Mining University, Saint-Petersburg, Russia:
A. A. Andreev, Leading Engineer
D. A. Vasiliev, Engineer

The authors appreciate participation of Norilsk Nickel’s Polar Division team members Yu. N. Nagovitsyn,
M. P. Sergunin, A. A. Bazin, L. V. Kakoshina and V. A. Gorpinchenko in this study.

One of the most critical factors to affect performance of any underground mine is the stress behavior of enclosing rock mass. The mines Oktyabrsky, Taimyrsky, Komsomolsky and Skalisty operating on deep rockburst-hazardous levels of the Talnakh ore field predict local rockburst hazard using geophysical techniques and the core disking indicator. Depending on the scale of mining operations and on the geodynamic complexity of a site, 10 to 90 holes from 5 to 20 m long are drilled in each mine every year. Abundance of drillholes allows choosing special cases for stress assessment in rock mass. In the available data bank on the sites of rockburst prediction and prevention in the Talnakh mine, some special cases are selected for the stress assessment in the actual stoping area. The geomechanical method of stress assessment in rock mass by the core disking indicator is simple, handy and sufficiently universal. The large bulk of the obtained data is applicable to various geomechanical problem solutions.

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