高地应力条件下大型地下洞室群围岩失稳模式分类及调控对策

doi:10.13722/j.cnki.jrme.2014.11.001

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Abstract Rockburst，collapse，large deformation of shotcrete layers after support，rock cracks and other damage phenomena appeared in the underground caverns of Jinping I，Houziyan and other large hydropower projects during construction. Systematic researches have seldom been performed on the deformation and instability modes of surrounding rock and the controlling measures. Based on the collected geological and design data，the geophysical surveying，the monitored data and the field investigation in underground caverns of Dagangshan，1st stage of Jinping，Houziyan，Guandi and other typical hydropower projects during construction，the failures of surrounding rock are divided into 3 modes：the rock structure controlled and gravity-driven mode；the stress-driven mode and the mixed mode according the controlling factors. The failure modes can also be divided into 16 basic modes according to the main project sites where instability occurs in 5 areas of the caverns. The proposed controlling measures were used in Houziyan project to show their feasibility and effectiveness.

Key words： rock mechanics igh geostress underground caverns failure modes dynamic control

Received: 16 June 2014

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.11.001 OR https://rockmech.whrsm.ac.cn/EN/Y2014/V33/I11/2161

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