Stability investigations around a mine tunnel through three-dimensional discontinuum and continuum stress analyses

Xin Wang, Pinnaduwa Kulatilake, Wei Dong Song

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

To exploit an underground mine effectively and safely, it is important to have a good understanding of the geotechnical behavior around the underground excavations made in the mine. The aim of this study was to investigate the geotechnical behavior around a tunnel excavated in a metal mine in China at the three-dimensional level. Using the information available on lithology, geological structures, in situ stress measurements, physical and mechanical properties of intact rock, discontinuities and interfaces between different rocks, a three-dimensional numerical model was built by using the 3DEC software package to simulate a tunnel excavation under a high in situ stress condition. Effect of the discontinuity network, possible intact rock and discontinuity parameter variability, representation of rock masses as discontinuum or equivalent continuum material and rock support system on the deformation, and stability around the tunnel was investigated. A very good agreement was obtained between the collected field deformation monitoring results and the results of the conducted numerical stress analyses.

Original languageEnglish (US)
Pages (from-to)98-112
Number of pages15
JournalTunnelling and Underground Space Technology
Volume32
DOIs
StatePublished - Nov 2012

Fingerprint

Tunnels
tunnel
Rocks
discontinuity
rock
in situ stress
Excavation
excavation
stress measurement
Lithology
Stress measurement
geological structure
Software packages
Numerical models
mechanical property
lithology
Physical properties
physical property
software
Mechanical properties

Keywords

  • Discontinuities
  • Discontinuum modeling
  • Equivalent continuum modeling
  • Geotechnical behavior
  • Rock tunnel
  • Three-dimensional stress analysis

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Building and Construction

Cite this

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title = "Stability investigations around a mine tunnel through three-dimensional discontinuum and continuum stress analyses",
abstract = "To exploit an underground mine effectively and safely, it is important to have a good understanding of the geotechnical behavior around the underground excavations made in the mine. The aim of this study was to investigate the geotechnical behavior around a tunnel excavated in a metal mine in China at the three-dimensional level. Using the information available on lithology, geological structures, in situ stress measurements, physical and mechanical properties of intact rock, discontinuities and interfaces between different rocks, a three-dimensional numerical model was built by using the 3DEC software package to simulate a tunnel excavation under a high in situ stress condition. Effect of the discontinuity network, possible intact rock and discontinuity parameter variability, representation of rock masses as discontinuum or equivalent continuum material and rock support system on the deformation, and stability around the tunnel was investigated. A very good agreement was obtained between the collected field deformation monitoring results and the results of the conducted numerical stress analyses.",
keywords = "Discontinuities, Discontinuum modeling, Equivalent continuum modeling, Geotechnical behavior, Rock tunnel, Three-dimensional stress analysis",
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N2 - To exploit an underground mine effectively and safely, it is important to have a good understanding of the geotechnical behavior around the underground excavations made in the mine. The aim of this study was to investigate the geotechnical behavior around a tunnel excavated in a metal mine in China at the three-dimensional level. Using the information available on lithology, geological structures, in situ stress measurements, physical and mechanical properties of intact rock, discontinuities and interfaces between different rocks, a three-dimensional numerical model was built by using the 3DEC software package to simulate a tunnel excavation under a high in situ stress condition. Effect of the discontinuity network, possible intact rock and discontinuity parameter variability, representation of rock masses as discontinuum or equivalent continuum material and rock support system on the deformation, and stability around the tunnel was investigated. A very good agreement was obtained between the collected field deformation monitoring results and the results of the conducted numerical stress analyses.

AB - To exploit an underground mine effectively and safely, it is important to have a good understanding of the geotechnical behavior around the underground excavations made in the mine. The aim of this study was to investigate the geotechnical behavior around a tunnel excavated in a metal mine in China at the three-dimensional level. Using the information available on lithology, geological structures, in situ stress measurements, physical and mechanical properties of intact rock, discontinuities and interfaces between different rocks, a three-dimensional numerical model was built by using the 3DEC software package to simulate a tunnel excavation under a high in situ stress condition. Effect of the discontinuity network, possible intact rock and discontinuity parameter variability, representation of rock masses as discontinuum or equivalent continuum material and rock support system on the deformation, and stability around the tunnel was investigated. A very good agreement was obtained between the collected field deformation monitoring results and the results of the conducted numerical stress analyses.

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