DBPapers
DOI: 10.5593/sgem2017/12/S02.013

ASSESSMENT OF HISTORICAL MINE EXCAVATIONS STABILITY USING NUMERICAL METHODS

M. Madziarz, D. Pawelus
Sunday 10 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7105-99-5 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 12, 95-104 pp, DOI: 10.5593/sgem2017/12/S02.013

ABSTRACT

The article concerns the problems of assessment the stability of the historical mine excavations which will be adapt to the underground tourist route. The issue is very important because of the special safety requirements for people (visitors), which do not have specialized safety training for employees of a typical underground mines. Post-mining facility, open to the public in 2013 in Krobica in Poland was characterized. Excavations from the XVI-XIX centuries are located in the rock mass characterized by a difficult geological and mining conditions. To evaluate the stability of the mine excavations the finite element method (FEM) was used. Parameters of rock layers for numerical modeling were determined on the basis of Hoek-Brown classification by the RocLab 1.0 computer program. Numerical modeling was performed using the Phase2 v. 8.0 computer program in a triaxial stress state and plane strain. Mohr-Coulomb strength criterion was used for numerical analysis. The rock mass was described by the elastic-plastic with softening model. On the basis of the results of numerical analysis the support of historical mine excavations was designed and performed.

Keywords: historical mine excavations, underground tourist route, numerical analysis of the stability of the mine excavations