DBPapers
DOI: 10.5593/SGEM2015/B13/S3.010

ANALYSIS THE NATURAL STRESS STATE OF SALT MASSIVE FROM PRAID MINE, ROMANIA

M. Toderas
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, 73-80 pp

ABSTRACT
For the salt massive of Praid mine, the tectonic phenomena has a determinative impact on the natural stress state; in this order, after the formation of the diapir in the central part of this, the normal stress is equal to the weight of the salt column and rock column too, until the surface (z = aH), and thus the stress state is very active. In the diapir flanks the passive natural stress state is developed and between these two limit states there are the intermediate stress states. For heterogeneous salt formation encountered the Praid mine area, the natural stress state evaluation was made taking into account the presence in salt massive of two areas: the first area where the salt is in a stress – deformation limit state and the second area where the natural stress - deformation state also has a reserve of strength. Therefore, identify those areas is particularly important, taking into account the strength anisotropy and the rheological behavior too. Based on laboratory tests we was performed to characterize the natural stress state of salt diapir from Praid mine, to elucidate the depth diapir mentioned that move from elastic behavior to inelastic one or from stable behavior to unstable one. For this purpose, were determined the correlations between the natural stress state components for these areas.

Keywords: salt massive, stress-deformation state, behavior, critical depth, structural stability