Analysis of activation features of geodynamic processes and formation of impact hazard at Nikolaevsk deposit

Aleksandr Sidlyar,Marina Potapchuk,Mikhail Lo-Mov,Vitaliy Usikov,Boris Saksin,M Guzev,I Rasskazov,V Makarov

doi:10.1051/e3sconf/201912901019

Aleksandr Sidlyar, Marina Potapchuk + Show 6 more

Open Access

https://doi.org/10.1051/e3sconf/201912901019

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Abstract

Based on the results of a joint analysis of seismic-acoustic monitoring data and the geological and structural features of the Niko-laevsk deposit, the main regularities of the formation of technogenic stress fields that determine its impact hazard have been identified. Additionally, using the method of mathematical modeling, a study was done of the stress-strain state of the rock mass taking into account the tectonically ac-tive fault TD-3 and safety measures were proposed to reduce the impact hazard of the rock mass at the Nikolaevsk deposit.

Highlights

The problem of impact hazard in underground mines of the Far Eastern region has not lost its relevance for several decades
Since 2011, over 250 dynamic manifestations of rock pressure in various forms have been recorded at the deposit, from rock outbursts to rock bursts and tectonic impacts
1 – projection of the contour of olistolith on a horizontal plane; 2 – block-forming faults and their names; 3 – other tectonic disturbances and their numbers; 4 – dykes of medium and basic composition; 5 – gorges in the body of limestone filled with metasomatites; 6 – relatively geodynamically stable region; 7 – gently sloping area with intermediate geodynamic activity; 8 – geodynamic region formed by morphological features of olistolith and modern stress field; 9 – lineaments of the relief of olistolith roof; – direction of the main horizontal compression of the rock mass; –location of gaps and open cracks formed by the earthquake of March 25, 2016

Summary

Introduction

The problem of impact hazard in underground mines of the Far Eastern region has not lost its relevance for several decades. 1 – projection of the contour of olistolith on a horizontal plane; 2 – block-forming faults and their names; 3 – other tectonic disturbances and their numbers; 4 – dykes of medium and basic composition; 5 – gorges in the body of limestone filled with metasomatites; 6 – relatively geodynamically stable region; 7 – gently sloping area with intermediate geodynamic activity; 8 – geodynamic region formed by morphological features of olistolith and modern stress field; 9 – lineaments of the relief of olistolith roof; – direction of the main horizontal compression of the rock mass; –location of gaps and open cracks formed by the earthquake of March 25, 2016 Fig. 3.

Host rocks

Conclusions