Title: Deformation analysis in connection with bending and shear failure of a monitored stope in the Kristineberg mine in Sweden

Authors: Kelvis Pérez Hidalgo; Erling Nordlund

Addresses: Division of Mining and Geotechnical Engineering, Luleå University of Technology, SE-971 87 Luleå, Sweden ' Division of Mining and Geotechnical Engineering, Luleå University of Technology, SE-971 87 Luleå, Sweden

Abstract: This paper presents the evaluation and interpretation of monitored deformations and field observations of a 50-m long stope at the mining depth Z1200 in the Kristineberg mine. The monitoring was conducted by Boliden Mineral AB in 2010 as a part of a research project focused on the rock support-rock mass interaction. Borehole extensometers, total stations and tape extensometers were used to monitor the stope. The objective of the presented work was to assess the deformation modes of the stope, i.e., bending and shearing. The evaluation of the data showed that the field deformation data can be used to identify bending in the HW and shear failure in the FW of the stope. The paper also shows that the deformations in the roof of the stope are influenced by the bending and shear failure. Typical deformation values related to the bending and shear failure are also estimated.

Keywords: stope monitoring; field observation; deformation; convergence; bending; shear failure; Sweden; mining industry.

DOI: 10.1504/IJMME.2014.064479

International Journal of Mining and Mineral Engineering, 2014 Vol.5 No.3, pp.181 - 201

Received: 27 May 2012
Accepted: 12 Aug 2013
Published online: 27 Aug 2014 *

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