DBPapers
DOI: 10.5593/SGEM2014/B22/S9.008

ANALYSIS OF THE IMPACT PROCESSES OF CLEARING WORKS ON THE CHANGE OF THE STRESS-STRAIN STATE IN THE PRIMARY AND DEPOSITS RE-MINING

A.B.Kairanbayeva ,L. Shamganova , Y.I.Chabdarova, A. Ormambekova
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-11-7 / ISSN 1314-2704, June 19-25, 2014, Book 2, Vol. 2, 57-64 pp

ABSTRACT
Extensive size and presence in bowels numerous mineral deposits made the Kazakhstan one of the leading mining countries. Large deposits and mining which started back in the 20th century, at the present stage mining experience some difficulties, because exhausted by far their main balance reserves. Today on such deposits is a revision going of reserves in content transfer off-balance inventories to balance active and develop reserves left in difficult geological conditions (increase in depth development zone flexures, multiple overlapping, etc.). As a result of this re- development is the formation of a new force field of secondary stress, which can increase in the negative manifestations of rock pressure: the emergence of centers of mass collapse, subsidence in the development of planes overlap thicker high cost of maintaining the crumbling roadway, appearance - displacement trough depressions on the surface and violation of problems due to the formation of zones of ventilation collapse. In this paper we analyzed the mining and geological documentation of the current state of mine workings on the stability and the results of field experiments, analyzed the influence of processes of clearing works on the change of the stress-strain state at the primary and re-working out, fitted changes depending on the load pillars in sequential excavation antechamber and barrier pillars, was determinate the causes of catastrophic rock pressure.

Keywords: stability of the developed space, technological collapse, mining structures, coving collapse, weakened areas, stress, movement of the earth surface, deformation, causes of collapse