METHODS OF STABILITY RETENTION OF EXPOSED ROCK SURFACES IN FRACTURED ROCK MASS UNDER LARGE-SCALE BLASTING

Formulas of safe ranges and relative elastic strains during large-scale blasting in surface or underground mines are presented. A safe range means stability of exposed rock surface in surface or underground mines under seismic effect of large-scale blasts. Based on the relative strain formula, controlled and uncontrolled parameters of drilling and blasting as well as physicotechnical properties of rocks are analyzed. The influence of controlled blast parameters on relative strains of rocks is assessed. Some methods of depression of large-scale blast action on the stability of exposed rock surfaces are described. The research findings can be used in industrial testing, for retention of exposed rock surfaces (benches and pit walls, unsupported side walls of rooms and pillars, etc.) during large-scale blasting in surface and underground mines. In the Oskol ore region of the Kursk Magnetic Anomaly, an underground multipurpose test ground is arranged for studying seismic effect of large-scale blasts in complex-structure ferruginous quartzite bodies in Lebedinsky and Stoilensky open pit mines and in Gibkin Mine.

For citation: Tyupin V. N., Anisimov V. N. Methods of stability retention of exposed rock surfaces in fractured rock mass under large-scale blastingGornyy informatsionno-analiticheskiy byulleten'. 2019;4:53-62. [In Russ]. DOI: 10.25018/0236-1493-2019-04-0-53–62.

Keywords

Large-scale blasts, exposed rock surface stability, rock mass, retention methods, surface mines, underground mines.

Issue number: 4
Year: 2019
ISBN: 0236-1493
UDK: 622.235:622.831
DOI: 10.25018/0236-1493-2019-04-0-53-62
Authors: Tyupin V. N., Anisimov V. N.

About authors: V.N. Tyupin, Doctor of Technical Sciences, Professor, e-mail: tyupinvn@mail.ru, Belgorod State National Research University, 308015, Belgorod, Russia, V.N. Anisimov, Candidate of Technical Sciences, Senior Researcher, Institute of Geosphere Dynamics of Russian Academy of Sciences, 119334, Moscow, Russia, e-mail: vicnican@ya.ru. Corresponding author: V.N. Anisimov, e-mail: vicnican@ya.ru.

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