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 language | English (US) |
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| State | Published - 2011 |
| Event | 45th US Rock Mechanics / Geomechanics Symposium - San Francisco, CA, United States Duration: Jun 26 2011 → Jun 29 2011 |
Other
| Other | 45th US Rock Mechanics / Geomechanics Symposium |
|---|---|
| Country/Territory | United States |
| City | San Francisco, CA |
| Period | 6/26/11 → 6/29/11 |
ASJC Scopus subject areas
- Geochemistry and Petrology
- Geophysics