DBPapers
DOI: 10.5593/SGEM2014/B13/S3.037

GEOTECHNICAL STUDY AND POSSIBILITIES OF RECOVERY OF THE USEFUL COMPONENTS FROM TAILINGS PONDS

S. IANCU (APOSTU), V. ARAD; O. BARAIAC.; D. Cristian NISTOR ; G. LASC
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, 277-284 pp

ABSTRACT
In Romania there are a number of about 93 tailings ponds with a total volume of about 324 million m3 of tailings stored, namely 729 million tonnes of tailings. This mass of mining waste can be efficient valued, thus contributing to the greening of affected mining areas and reintroduction in the economic circuit of appreciable quantities of metal and non-metal minerals. Coroieşti tailings pond is exploited for coal: vitrit 40.23%, argillaceous minerals 43.21%, which can be used in the construction materials industry. In the tailing ponds site from U.P. Coroieşti were performed geotechnical works that consisted of a drilling on the Pond 1A beach and several wells drilled outside of the two compartments 1A and 1B, which led to the determination of ponds stability. We used a software that allows the calculation of the stability of the potential slip surfaces using the group of the analysis methods of the limit balance with the division of the section in vertical strips. The analysis methods can be used for single surfaces that have been identified in situ as potential critical slip surfaces or more slip surfaces. For Coroiesti tailing pond, we have used the method of surfaces generating by using a polygon, which represents the geometrical place of the slip surfaces centres in a metrical form with the resolution given by nework increment pace. The material samples taken from these geotechnical works have been analysed in the Laboratory for Analysis and Testing in Constructions of the University of Petrosani and the following parameters have been determined: volumetric density; granulometric analysis; porosity; angle of internal friction; cohesion; specific compaction; permeability.

Keywords: tailings pond, stability, mining waste, useful products, geotechnical works