高地应力地下厂房洞室群开挖卸荷围岩力学响应与稳定性分析(英文)
发布时间:2022-02-15 06:19
为了研究中国西南地区双江口水电站高地应力地下厂房洞室群开挖卸荷围岩力学响应与稳定性,构建高精度微震监测系统,并采用离散元法开展数值模拟。分析了开挖卸荷引起的围岩时空损伤特征,研究了高地应力与结构面共同控制下围岩塌方形成过程微震震源参数演化规律。建立了地下厂房洞室群三维离散元数值模型,揭示了开挖卸荷引起的围岩变形特征。研究结果表明,高地应力地下厂房洞室群开挖卸荷引起的微震事件活动频繁,主厂房大桩号顶拱区域围岩损伤严重;在塌方发生前,微震事件数量和累积能量释放快速增长,视应力陡增之后出现下降,剪切以及混合型式的微破裂数量和占比显著增加;地下洞室最大位移基本位于拱肩区域。微震监测数据和数值模拟结果显示出较好的一致性,可为高地应力地下厂房洞室群围岩损伤评估和灾害预警提供重要参考。
【文章来源】:Journal of Central South University. 2020,27(10)EISCICSCD
【文章页数】:14 页
【文章目录】:
1 Introduction
2 Engineering background
2.1 Project description
2.2 Geological conditions
2.3 Construction schedule
3 Excavation-induced MS activities
3.1 MS monitoring system
3.2 Temporal distribution of microseismicity
3.3 Spatial distribution of microseismicity
3.4 Evolution laws of MS source parameters during rock collapse formation
4 Numerical simulation using 3DEC
4.1 Numerical model
4.2 Simulation results
5 Discussion
6 Conclusions
Contributors
Conflict of interest
【参考文献】:
期刊论文
[1]埋深对圆形硬岩隧洞板裂破坏特征影响的模拟试验(英文)[J]. 罗勇,宫凤强,李夕兵,王善勇. Journal of Central South University. 2020(03)
[2]Failure precursor of surrounding rock mass around cross tunnel in high-steep rock slope[J]. 马克,唐春安,徐奴文,刘峰,徐敬武. Journal of Central South University. 2013(01)
本文编号:3626085
【文章来源】:Journal of Central South University. 2020,27(10)EISCICSCD
【文章页数】:14 页
【文章目录】:
1 Introduction
2 Engineering background
2.1 Project description
2.2 Geological conditions
2.3 Construction schedule
3 Excavation-induced MS activities
3.1 MS monitoring system
3.2 Temporal distribution of microseismicity
3.3 Spatial distribution of microseismicity
3.4 Evolution laws of MS source parameters during rock collapse formation
4 Numerical simulation using 3DEC
4.1 Numerical model
4.2 Simulation results
5 Discussion
6 Conclusions
Contributors
Conflict of interest
【参考文献】:
期刊论文
[1]埋深对圆形硬岩隧洞板裂破坏特征影响的模拟试验(英文)[J]. 罗勇,宫凤强,李夕兵,王善勇. Journal of Central South University. 2020(03)
[2]Failure precursor of surrounding rock mass around cross tunnel in high-steep rock slope[J]. 马克,唐春安,徐奴文,刘峰,徐敬武. Journal of Central South University. 2013(01)
本文编号:3626085
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