DBPapers
DOI: 10.5593/SGEM2014/B13/S3.007

ASSESSING THE STABILITY SAFETY FACTOR IN OLTENIA LIGNITE OPENCAST MINING

G. Tudor, A. Roland, N. M.Catalin
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, 49-54 pp

ABSTRACT
Coal mining operation exerts a significant impact on the surface through the intermediate of land degradation over the long term, mainly as a result of instability in the land after extraction operations. Landslides are geodynamic process phenomena of altering the landscape, with slow and regular character, which restores the natural balance of slopes. When they tempestuously are occurring can cause loss of life and significant property damage. As it regards the exploitation of coal in the quarries, dumps of sterile resulting from the extraction of coal have generated serious discussion in time. Still in the design stage of their life cycle are taken into account the aspects related to physical and mechanical properties of the material they are made off. It comes both from strata above the lignite deposit and sterile intercalations within the coal layers. The paper gives an overview of various practices that can be adopted to control the adverse effect of mining. Also, based on the interactions between the geomechanics, planning and production groups in open-pit more is presented the determination algorithm of safety factor for the assessment of the risk of affecting the stability.

Keywords: lignite, open pit, stability, physical and mechanical properties.