HYDRODYNAMIC MODEL OF THE COAL STRIP MINE "DRMNO" - SERBIA

9th International Multidisciplinary Scientific GeoConference - SGEM2009, www.sgem.org, SGEM2009 Conference Proceedings/ ISBN 10: 954-91818-1-2, June 14-19, 2009, Vol. 1, 237-244 pp

ABSTRACT

The "Drmno" coal strip mine is one of the most important factors of the electro-power
system of Serbia. The coal exploitation has taken place over 20 years (since 987), with
the exploitation of 6·106 tons in 2007. The coal exploitation is complicated by the waterbearing
character of the roof sediments, which is the consequence of the vicinity of the
rivers Danube and Mlava. Groundwater protection is performed using the wells
distributed in several lines (about 200 wells). Current solutions were formed either
without the proper hydrodynamic analysis or based on "ad hoc" mathematical
groundwater models of insufficient reliability for the design purposes.

As the mine progressed towards the river Danube, the problem of mine dewatering is
intensifying and the question of its future concept is raised. Up to 2005, there was no
proper hydrogeological monitoring. Since then, the establishment of a quality
groundwater monitoring enabled creation of quality hydrodynamic model of the mine.
The model was finished by the end of 2008. Before its completion, geological and
hydrogeological models of the mine sediments were formed, and the analysis of all the
factors of the groundwater flow. The model is permanently updated with new
monitoring data.

At this moment, this model is used for the current coal exploitation monitoring, analysis
of the dewatering system operation, simulation of possible situations in the field, and
long-term prognosis for the mine development.

Keywords: coal strip mine, monitoring, hydrogeological model, hydrodynamic model