余震动对上游法尾矿坝稳定性的影响研究
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摘要
上游法尾矿库利用库内尾矿堆筑后期子坝,其库内尾矿在矿山生产期内长期处于欠固结状态,密实度较低,结构松散,对地震作用非常敏感,在地震作用下极易出现液化区,导致坝体失稳。结合某一上游法筑坝的尾矿库工程研究项目,分析余震动对尾矿坝的稳定性影响,所得成果可以为类似尾矿坝工程抗震设计和研究提供参考。
The upstream construction method of tailing dams uses the tailings in the reservoir to construct the later-period sub-dam.As the tailings in the reservoir is in under-consolidated state and has low density and loose structure during the mine production period,it is very sensitive to seism and very easy to liquefy due to seismic effect,leading to the instability of dam body.In combination with a research project of a tailing dam adopting upstream construction method,the impact of after-shock on the stability of tailing dam is analyzed,with the results being reference to the seismic design of similar tailing dam projects.
The upstream construction method of tailing dams uses the tailings in the reservoir to construct the later-period sub-dam.As the tailings in the reservoir is in under-consolidated state and has low density and loose structure during the mine production period,it is very sensitive to seism and very easy to liquefy due to seismic effect,leading to the instability of dam body.In combination with a research project of a tailing dam adopting upstream construction method,the impact of after-shock on the stability of tailing dam is analyzed,with the results being reference to the seismic design of similar tailing dam projects.
引文
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[2]汪闻韶.土的液化机理[J].水利学报,1981,11(5):22-34.
[3]孔宪京,潘建平,邹德高.尾矿坝液化流动变形分析[J].大连理工大学学报,2008,48(4):541-545.
[4]王刚,张建民.地震液化问题研究进展[J].力学进展,2007,37(4):575-589.
[5]张克绪.尾矿坝的抗震设计和研究(上)[J].世界地震工程,1988(1):13-18.
[6]吴波,欧进萍.考虑余震影响的结构抗震设计实用方法[J].哈尔滨建筑工程学院学报,1994,27(4):9-15.
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