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乌兹别克斯坦甘姆奇克隧道岩爆特点及其形成机制
收稿日期: 2015-06-23
修回日期: 2015-08-08
网络出版日期: 2016-03-30
基金资助
中铁隧道集团科技创新计划重大课题(隧研合2014-23)
Mechanism of Rockburst of Qamchiq Tunnel in Uzbekistan
Received date: 2015-06-23
Revised date: 2015-08-08
Online published: 2016-03-30
邓伟 , 刘成禹 , 李红军 , 郭志武 . 乌兹别克斯坦甘姆奇克隧道岩爆特点及其形成机制[J]. 隧道建设, 2016 , 36(3) : 275 -281 . DOI: 10.3973/j.issn.1672-741X.2016.03.005
The rockburst mechanism of Qamchiq tunnel on Angren to Pop railway in Uzbekistan is analyzed on the basis of rockburst laws and the geological conditions of the tunnel. The study results show: 1) The surrounding rocks (granodiorite and syenite porphyry) and horizontal residual tectonic stress in the surrounding rocks are the main causes for the rockburst of Qamchiq tunnel. 2) The rockburst occurs to the tunnel beneath the cover depth of 40 m. 3) The rockburst occurs to the crownhance is mainly related to the maximum principal stress (horizontal ground stress). 4) The rockburst mode of the tunnel can be divided into 4 types, i.e. fiaky rock ejection, breakdown of nearly horizontal bedded rock, rock breakout+rock collapse and platy rock breakdown in side wall.
Key words: tunnel; rockburst; forming mechanism; residual tectonic stress
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