DBPapers
DOI: 10.5593/SGEM2014/B13/S3.068

ROCK MASSIF – SUPPORT MECHANICAL INTERACTION MODELS PROPOSED FOR THE GEOMECHANICAL CONDITIONS FROM PETRILA COLLIERY, ROMANIA

M. Toderas
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, 521-528 pp

ABSTRACT
Selecting the rock massif - support system interaction model involves establishing the model that corresponds to the studied problem, which requires knowledge of the real deformation behaviour of the massive by assessing all involved geomechanical characteristics, but also all the technical, mining and organizational factors, which determines the pressure manifestation’s regime and ensure the stability throughout the duration of activity of the underground works. This paper presents some results obtained during three years based on the measurements of the manner of support’s deformation in galleries located at the levels +50, 0, -50, -100 and -150, considering that in this period the gallery located at the level -150 was in drift. The results have allowed: processing of the dependence of the minimum specific bearing capacity required of the metallic arched support, according to the values of the stability coefficient based on mathematical statistics; assessing the dependence of the pressure on the support on time; it was also determined the dependence of rock displacements in respect to time for the calculated stability coefficients.

Keywords: interaction, support, rock massif, elastic-viscous-plastic model, stress - deformation state, relaxation zone