摘要
为能更好地反映深埋隧洞岩爆的脆性破坏特征,在岩爆的数值模拟中采用了一个复合破坏准则弹脆塑性本构模型,并结合锦屏二级水电站辅助洞工程,综合运用各种判据和方法建立岩爆的预测体系,对开挖过程中岩爆的发生情况进行了预测,判定在洞肩和洞底角点处发生岩爆可能性较大,这与锦屏二级水电站辅助洞岩爆实际发生情况基本一致。对岩爆的预测具有一定的参考价值。
In order to better reflect the characteristics of brittle failure of rockburst in deep tunnel,an elasto-brittle-plastic constitutive model based on combined failure criterion for brittle rock was employed in the numerical simulation of rockburst.A rockburst prediction system based on various criteria and methods was established to predict the rockburst during the excavation of the auxiliary tunnel of Jinping-II hydropower station.The analysis showed that rockburst was more possible to happen at the shoulder and bottom corner points of the tunnel,which was consistent with the in-situ actual observations.
出处
《长江科学院院报》
CSCD
北大核心
2012年第5期40-44,共5页
Journal of Changjiang River Scientific Research Institute
基金
国家自然科学基金(50539090)
关键词
深埋隧洞
脆性岩体
岩爆
数值模拟
预测
deep tunnel
brittle rock
rockburst
numerical simulation
prediction
