DBPapers
DOI: 10.5593/SGEM2014/B13/S3.001

A NEW APPROACH IN SEISMIC SAFETY EVALUATION FOR BLASTING OPERATIONS PERFORMED BY RUSSIAN MINING COMPANIES

A. Kholodilov, A. Gospodarikov, A. Miasnikov
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-09-4 / ISSN 1314-2704, June 19-25, 2014, Book 1, Vol. 3, 3-10 pp

ABSTRACT
Open pit mines in Russia are characterized by vast extent up to several kilometers. When blasting operations are performed, the impact of seismic vibrations to objects of social and industrial infrastructure has to be evaluated periodically. Generally accepted seismic vibration impact analyses is based on peak particle velocity for the whole velocigram, which drastically restricts the volume of used measurement information. In this article an effective method of using all particles velocity values received from a single blast in the open pit mine velocigram to find the parameters defining the link between prognosis peak particle velocity and reduced charge of an explosive is suggested. Reduced charge prescribes the mass of simultaneously exploded charge raised in 1/3 power divided by epicentral distance. To this effect a single blast in the open pit mine is prescribed as a sequence of simultaneously exploded charges characterized by their values of reduced charges. The record of seismic action from each charge in velocigram module envelope curve for a single blast in the open pit mine is carried out by using digital low-pass filtering showing the dependence of the particle velocity module on time. As a consequence of regression analysis it was established that full functional connection between prognosis peak particle velocity and reduced charge contains only one parameter. This parameter can be obtained from seismic wave propagation velocity value data.

Keywords: blasting operations, seismic vibrations, peak particle velocity, velocigram.