DBPapers
DOI: 10.5593/sgem2012/s03.v1053

SEISMIC PROBLEMS OF THE SURROUNDINGS OF AN OPEN PIT MINE DURING MINING

S. ZDRAVKOVIC, B. MLADENOVIC, D. ZLATKOV
Wednesday 1 August 2012 by Libadmin2012

References: 12th International Multidisciplinary Scientific GeoConference, www.sgem.org, SGEM2012 Conference Proceedings/ ISSN 1314-2704, June 17-23, 2012, Vol. 1, 797 - 804 pp

ABSTRACT

Seismic effects that occur during mining in open pits are similar to the seismic effects of
small and medium intensity earthquake. The paper outlines how the enormous energy is
released during a strong earthquake and regardless of the hypocenter depth that could be
dozens of kilometers, the area affected by a strong earthquake is very large and the
intensity is very high. Notwithstanding the much lower energy released during mining,
there is a seismic damage to buildings in the surroundings, as pits are usually near
residential areas.
A complex solution of the problems of mining and seismic effects can be reached only
by experimental investigation. Earthquake can not be controlled, but the mining can be
directed in full, especially by adequate amount of explosive charge and direction of
mining. So this fact must be taken into account and proposed formulas are based on
these conditions. A special note is given to the seismic anomaly that buildings closer to
the field of mining are in some cases less affected than more distant ones. Therefore the
new non-standard formulas will be given in the paper, which are more adequate for
solving this seismic anomaly. The influence of blasting location with two boreholes
charged, one with the initial explosive at the top and the second in the bottom of the
drill, is analyzed. This approach significantly contributed to solving some anomalies,
such as that much of the wave’s energy is released in the area far away from the mine.
Hence there is a need for better protection from seismic effects on buildings at these
locations.

Keywords: open pit, mining, seismic effects, seismic anomaly, drilling, explosive,
protection of buildings