Investigation of rock mass stability around tunnels in an underground mine by three-dimensional numerical modeling

Y. Xing, Pinnaduwa Kulatilake, L. A. Sandbak

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, the stability of the tunnels in an underground mine was investigated by three-dimensional numerical modeling. Based on the available geological, geotechnical, and mine construction information, a three-dimensional model was built using the 3DEC code. The model contains the features of the inclined lithologies, a large-scale non-persistent fault, and a complex tunnel system. Stress analyses were performed on the rock mass having the elastic-perfectly plastic and strain-softening behaviors, respectively. The effects of the horizontal in situ stress and the support system were studied through the distributions of stress, displacement, and yielded zone around the tunnels. By comparing the numerical modeling results with the field deformation measurements, it was found that the strain-softening cases with the lateral stress ratios of 0.5 and 1.0 are accurate and applicable for this mine.

Original languageEnglish (US)
Title of host publication51st US Rock Mechanics / Geomechanics Symposium 2017
PublisherAmerican Rock Mechanics Association (ARMA)
Pages2083-2092
Number of pages10
Volume3
ISBN (Electronic)9781510857582
StatePublished - Jan 1 2017
Event51st US Rock Mechanics / Geomechanics Symposium 2017 - San Francisco, United States
Duration: Jun 25 2017Jun 28 2017

Other

Other51st US Rock Mechanics / Geomechanics Symposium 2017
CountryUnited States
CitySan Francisco
Period6/25/176/28/17

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

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