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Comprehensive safety evaluation method of surrounding rock during underground cavern construction

Underground Space 2021年第1期6卷 46-61页

作者： Qingwen Ren Lei Xu Aixi Zhu Mingzhang Shan Linfei Zhang Jiafeng Gu Lei Shen College of Mechanics and Materials Hohai UniversityNanjing 210098China College of Water Conservancy and Hydropower Engineering Hohai UniversityNanjing 210098China Shanghai Tongyan Civil Engineering Technology Co.Ltd. China China Resources Land Ltd. WeihaiChina

The deformation instability of surrounding rock and the collapse of rock blocks are two common failure modes observed during the construction of underground ***,a comprehensive safety evaluation method(CSEM)of surrounding rock for application during underground cavern construction is presented in this *** method can be used to evaluate the deformation stability of surrounding rock and predict the collapse of rock blocks,***,a deformation stability prediction and evaluation method(DSPEM)for rock mass is *** combines the safety evaluation method based on a deformation statistical analysis and an inverse deformation prediction method using measured deformation data of surrounding *** approach possesses the unique characteristics of complementary and mutual *** addition,a comprehensive early-warning index system(CWIS)for assessing the deformation stability of surrounding rock is *** consists of three types of warning indicators and three levels of warning *** earlywarning values can be adjusted reasonably by the prediction correction method according to the measured *** the collapse of rock blocks controlled by structural surfaces,a rapid prediction method of rock block collapse(RPMBC)based on the block theory is then ***,combining the DSPEM,RPMBC,and CWIS,the CSEM of surrounding rock for assessing the safety of cavern construction is *** can provide technical support for decision making on the safety of surrounding rock during the construction of underground caverns.

关键词： Underground cavern Rock mass safety evaluation during construction Early warning system

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