Effect of tunnel shape and support system on stability of a tunnel in a deep coal mine in China

Z. H. Yu, Pinnaduwa Kulatilake, F. X. Jiang

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Stability level of tunnels that exist in an underground mine has a great influence on the safety, production and economic performance of the mine. Ensuring of stability for soft-rock tunnels is an important task for deep coal mines located in high in situ stress conditions. The aim of this study is to investigate the effect of tunnel shape and support pattern on the deformation, failure zone and stability around a tunnel located in a coal rock mass in China and to select an appropriate tunnel shape and a support pattern to provide stable stress-deformation conditions around the tunnel. Using the available information on stratigraphy, geological structures, in situ stress measurements and geo-mechanical properties of intact rock and discontinuity interfaces, a three-dimensional numerical model was built by using FLAC software to simulate the stress conditions around the tunnel in the coal rock mass. Analyses were conducted for several tunnel shapes and rock support patterns. Results obtained for the distribution of failure zones, and stress and displacement fields around the tunnel were compared to select the best tunnel shape and support pattern to achieve the optimum stability conditions.

Original languageEnglish (US)
Title of host publication45th US Rock Mechanics / Geomechanics Symposium
StatePublished - 2011
Event45th US Rock Mechanics / Geomechanics Symposium - San Francisco, CA, United States
Duration: Jun 26 2011Jun 29 2011

Other

Other45th US Rock Mechanics / Geomechanics Symposium
CountryUnited States
CitySan Francisco, CA
Period6/26/116/29/11

Fingerprint

support systems
Coal mines
coal
coal mine
tunnels
China
Tunnels
tunnel
Rocks
rocks
Coal
in situ stress
rock
effect
FLAC
Stratigraphy
stress measurement
soft rock
stratigraphy
Stress measurement

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Yu, Z. H., Kulatilake, P., & Jiang, F. X. (2011). Effect of tunnel shape and support system on stability of a tunnel in a deep coal mine in China. In 45th US Rock Mechanics / Geomechanics Symposium

Effect of tunnel shape and support system on stability of a tunnel in a deep coal mine in China. / Yu, Z. H.; Kulatilake, Pinnaduwa; Jiang, F. X.

45th US Rock Mechanics / Geomechanics Symposium. 2011.

Research output: Chapter in Book/Report/Conference proceedingChapter

Yu, ZH, Kulatilake, P & Jiang, FX 2011, Effect of tunnel shape and support system on stability of a tunnel in a deep coal mine in China. in 45th US Rock Mechanics / Geomechanics Symposium. 45th US Rock Mechanics / Geomechanics Symposium, San Francisco, CA, United States, 6/26/11.
Yu ZH, Kulatilake P, Jiang FX. Effect of tunnel shape and support system on stability of a tunnel in a deep coal mine in China. In 45th US Rock Mechanics / Geomechanics Symposium. 2011
Yu, Z. H. ; Kulatilake, Pinnaduwa ; Jiang, F. X. / Effect of tunnel shape and support system on stability of a tunnel in a deep coal mine in China. 45th US Rock Mechanics / Geomechanics Symposium. 2011.
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