STUDY OF A SHOCK WAVE IN UNDERGROUND WORKINGS OF THE MAGNEZITOVAYA MINE
P. V. Menshikov, V. A. Kutuev, S. N. Zharikov
Institute of Mining Engineering of the Ural branch, Russian Academy of Sciences, Ekaterinburg, Russia
Keywords: Blasting operations, technological blast, blasting in underground mine workings, air shock wave, excess pressure at the ASW front, maximum permissible excess pressure, industrial safety of underground mining, attenuation (gain) ratio
Abstract
The results of studying the impact of a shock wave of technological underground blasts are presented. Instrumental measurements of the actual pressure values at the front of an air shock wave (ASW) during blasting operations at the Magnezitovaya mine were carried out. Safe distances for the effect of air shock wave excluding injury to people are determined on their basis. The calculation of the excess pressure at the air shock front is made taking into account the local resistance of mine workings. A comparison of the recorded values of excess pressure with the maximum permissible values for workers, wooden lintels, ventilation pipelines, electrical equipment and power grids is carried out.
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