Analysis of blasting seismic impact on underground mining workings under the conditions of the Magnezitovaya mine

Vyacheslav Kutuev,Sergey Zharikov,Pavel Menshikov,I Rasskazov,S Tkach

doi:10.1051/e3sconf/202019201029

Abstract

Seismic impact of technological explosions on underground mining workings of the Magnezitovaya mine was assessed. Seismic stability of rocks of the Magnezitovaya mine was determined and safe distances from technological explosions have been calculated by the admissible seismic effect for rocks. URAN and Minimate Plus seismic recorders with three-component seismic receivers were used to establish the dynamic impact on the mine workings. Based on comparison of calculated values and experimental measurements, the recommendations are given for explosive mass limitation at a slowing-down stage at a level of minimum dangerous values for technological explosions in underground mine. It is established that the blasting operations carried out at the Magnezitovaya mine of PAO Magnezit Combine with fan longhole stopping were performed with the seismic impact safety of underground technological explosion and will not lead to the loss of rock mass stability near the underground workings. Relevance of these studies is to ensure industrial safety of underground mining operations.

Highlights

The seismic impact of technological explosions on underground workings is among the numerous factors predetermining mining safety, which is of practical significance under the conditions of the Magnezitovaya mine of PAO Magnezit Cimbine
To determine the permissible value of the velocity of seismic stress fluctuations, it is necessary to set the permissible value in the rock mass, which is in accordance with the seismic stability condition of the mine working [1]:
The seismic stability of rocks of the Magnezitovaya mine was determined and safe distances from explosions were calculated by the permissible seismic effect

Summary

Introduction

The seismic impact of technological explosions on underground workings is among the numerous factors predetermining mining safety, which is of practical significance under the conditions of the Magnezitovaya mine of PAO Magnezit Cimbine. The aim of the research is to study the conditions of seismic stability of the mine workings and to develop the methods of calculating the seismic safe distances from the explosion site. The scientific basis of the research is to measure the velocity of seismic fluctuations of rocks and to determine its permissible value

Objectives

Methods

Results

Conclusion