Stability estimation and justification of support systems in transition to underground mining in the Olimpiada deposit

The article discusses the procedure and principles of support system designs for horizontal and inclined excavations in coherent transition from open to underground mining in terms of the Olimpiada deposit in the Krasnoyarsk Krai. This study is specific for using the information on rock mass obtained at the stage of opencast mining. The main criteria were the Olimpiada rock mass classification indexes determined during operation of the Vostochny open pit mine. Stability and service life of underground excavations without support were estimated using Bieniawski’s RMR system, and support designs were selected using Q-index introduced by Barton. A 3D block model is developed for the on-line determination of mine support stability at the stage of mine planning. Three-dimensional numerical modeling methods are used to assess probability of seismic events in the form of rock bursts on approach of underground excavations and fault zones in the Olimpiada deposit.

Bushkov V. K., Shemetov R. S. Stability estimation and justification of support systems in transition to underground mining in the Olimpiada deposit. MIAB. Mining Inf. Anal. Bull. 2020;(9):40-54. [In Russ]. DOI: 10.25018/0236-1493-2020-9-0-40-54.

V.K. Bushkov¹, Cand. Sci. (Eng.), Assistant Professor, Mining Engineer, Head of Laboratory, e-mail: bushkovvk@polyus.com,
R.S. Shemetov¹, Mining Engineer, Leading Engineer, e-mail: shemetovrs@polyus.com,
¹ LLC «Polyus Project», 660041, Krasnoyarsk, Russia.

R.S. Shemetov, e-mail: shemetovrs@polyus.com.

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