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Damage of Circular Tunnels under Millisecond Blasting-unloading in DEM
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- PENG Siyu
- Kyushu University
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- MITANI Yasuhiro
- Kyushu University
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- HONDA Hiroyuki
- Kyushu University
Description
Blasting excavation of deep tunnels is a typical dynamic process subjected to in-situ stress redistribution and blast loading. This study establishes a numerical model for millisecond blasting in the DEM method for two-dimensional circular tunnel excavation. The process of millisecond blasting in a circular tunnel is depicted as a sequence of delayed multiple blastings (multiple dynamic loading-unloadings and static adjustment processes) executed on distinct blasting surfaces that are concentric with the tunnel. After calibration and verification, the dynamic stress evolution process of surrounding rock and the resulting damage to surrounding rock are investigated.
Journal
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- International Journal of the JSRM
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International Journal of the JSRM 20 (2), 1-6, 2024-01-05
Japanese Society for Rock Mechanics
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Details 詳細情報について
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- CRID
- 1390580173466975616
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- ISSN
- 21898405
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- Text Lang
- en
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- Data Source
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- JaLC
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- Abstract License Flag
- Disallowed