DBPapers
DOI: 10.5593/SGEM2015/B13/S5.111

EVALUATION OF VIBRATION EFFECT IN SHALOW MINE CAUSED BY NATURAL AND TECHNICAL SEISMICITY

Z. Kalab, M. Lednicka, T.Kalab, J. Knejzlik
Friday 7 August 2015 by Libadmin2015

References: 15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-33-9 / ISSN 1314-2704, June 18-24, 2015, Book1 Vol. 3, 855-862 pp

ABSTRACT
This paper describes an analysis of vibration effect in a shallow mine resulting from ten-year seismological monitoring performed there. Industrial Heritage Site, the Jeroným Mine, is located in West Bohemia, the Czech Republic. At present, the whole system of shallow mine cavities consists of two separate parts, the lowest accessible part of the mine is on the dewatered level of about 55 m below the surface. Experimental geomechanical and seismological measurements are performed in the mine so that geomechanical stability of the whole underground complex may be evaluated. Permanent seismological monitoring has been carried out since 2004 using a seismic station JER1, installed in the mine about 35 m below the surface in one of the largest chambers. From 2004 to 2006 the seismic station JER 1 monitored especially effects of blasting operations during the reconstruction of drainage adit. From 2008, more than 2000 earthquakes in West Bohemia were recorded at the station JER 1 during three intensive seismic swarms in 2008, 2011 and 2014. Other sources of vibrations, recorded at the JER1 station, represent quarry blasts from nearby quarries, and vibrations generated by traffic on the road situated above the mine. Detailed analysis of vibration effect caused by individual seismic load sources is performed in time and frequency domain.

Keywords: vibration effect, mine, earthquake, quarry blast, frequency analysis