摘要
以拉西瓦水电站地下厂房洞室群原设计方案为例 ,基于其赋存地质条件调研结果和岩爆产生基本条件 ,对岩爆趋势进行宏观预测 ;并结合研究区其他高地应力现象 ,建立了岩爆预测类比判据。进而基于厂房开挖后二次应力场数值计算结果 ,以所建判据圈定了岩爆可能发生部位及强烈程度。结果表明 ,将宏观判据与类比判据结合的岩爆综合预测方法 ,考虑因素全面 ,也尊重了研究区实际情况 ,因而合理可行。
Based on the in-situ investigation results for the engineering geological conditions where LAXIWA hydro-power station is built in and the comprehensive analysis for the basis conditions yielding rock burst, the authors not only macro-forecasted the rock burst yielding tendency for the chamber group of underground power house, but also built the analog criterion based on another high geo-stress phenomena (e.g., core discing) with engineering geological analog method. Finally, the possible rock burst position and its intensive grade were judged by the analog criterion after the secondary stress in the surrounding rock of the chamber group was simulated with 3D-σ software .It is shown that, the rock burst comprehensive forecasting method in the paper is essentially the one connecting the macroscopic criterion with analog criterion, can not only reflect the influencing factors of rock burst but also respect the engineering geological environment. Therefore, it is reasonable and feasible and can be applied in other underground engineering.
出处
《地球科学进展》
CAS
CSCD
2004年第3期451-456,共6页
Advances in Earth Science
关键词
洞室群
岩爆
宏观预测
类比判据
Chamber group
Rock burst
Macroscopic criterion
Analog criterion.
