高地應(yīng)力地下廠房洞室群開(kāi)挖卸荷圍巖力學(xué)響應(yīng)與穩(wěn)定性分析(英文)
發(fā)布時(shí)間:2022-02-15 06:19
為了研究中國(guó)西南地區(qū)雙江口水電站高地應(yīng)力地下廠房洞室群開(kāi)挖卸荷圍巖力學(xué)響應(yīng)與穩(wěn)定性,構(gòu)建高精度微震監(jiān)測(cè)系統(tǒng),并采用離散元法開(kāi)展數(shù)值模擬。分析了開(kāi)挖卸荷引起的圍巖時(shí)空損傷特征,研究了高地應(yīng)力與結(jié)構(gòu)面共同控制下圍巖塌方形成過(guò)程微震震源參數(shù)演化規(guī)律。建立了地下廠房洞室群三維離散元數(shù)值模型,揭示了開(kāi)挖卸荷引起的圍巖變形特征。研究結(jié)果表明,高地應(yīng)力地下廠房洞室群開(kāi)挖卸荷引起的微震事件活動(dòng)頻繁,主廠房大樁號(hào)頂拱區(qū)域圍巖損傷嚴(yán)重;在塌方發(fā)生前,微震事件數(shù)量和累積能量釋放快速增長(zhǎng),視應(yīng)力陡增之后出現(xiàn)下降,剪切以及混合型式的微破裂數(shù)量和占比顯著增加;地下洞室最大位移基本位于拱肩區(qū)域。微震監(jiān)測(cè)數(shù)據(jù)和數(shù)值模擬結(jié)果顯示出較好的一致性,可為高地應(yīng)力地下廠房洞室群圍巖損傷評(píng)估和災(zāi)害預(yù)警提供重要參考。
【文章來(lái)源】:Journal of Central South University. 2020,27(10)EISCICSCD
【文章頁(yè)數(shù)】:14 頁(yè)
【文章目錄】:
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
【參考文獻(xiàn)】:
期刊論文
[1]埋深對(duì)圓形硬巖隧洞板裂破壞特征影響的模擬試驗(yàn)(英文)[J]. 羅勇,宮鳳強(qiáng),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]. 馬克,唐春安,徐奴文,劉峰,徐敬武. Journal of Central South University. 2013(01)
本文編號(hào):3626085
【文章來(lái)源】:Journal of Central South University. 2020,27(10)EISCICSCD
【文章頁(yè)數(shù)】:14 頁(yè)
【文章目錄】:
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
【參考文獻(xiàn)】:
期刊論文
[1]埋深對(duì)圓形硬巖隧洞板裂破壞特征影響的模擬試驗(yàn)(英文)[J]. 羅勇,宮鳳強(qiáng),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]. 馬克,唐春安,徐奴文,劉峰,徐敬武. Journal of Central South University. 2013(01)
本文編號(hào):3626085
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