岩土力学2012，Vol.33Issue(7)：2133-2141,9.
考虑空间效应的地下洞室爆破开挖松动区参数场位移反分析
Displacement back analysis of parameter field of blasting excavation damaged zone around openings considering spatial effect
摘要
Abstract
Blasting excavation damaged zone (EDZ) is regarded as a heterogeneous and unsteady three-dimensional disturbed field evolving with the excavation progress; and the mechanical parameters in EDZ are identified as a parameter field of time-space evolution characteristics. A displacement back analysis method is proposed for parameter field identification of the EDZ around openings in practical working state, considering the spatial effect of blasting disturbance and real deformation response of rock mass. Based on the spatial displacement field obtained by space interpolation of local monitoring displacements, by analyzing the deformation disturbance mechanism of the surrounding rock, a numerical model for parameter field of rock mass deformation modulus in EDZ is put forward; and the applicability and parameters sensibility are further analyzed. Taking the deformation modulus for instance and combining the measured displacement of surrounding rock, the dynamic implementation progress of the displacement back analysis for parameter field is introduced in detail. Finally, the method is applied to the parameter field identification and dynamic feedback analysis and prediction of stability assessment of the surrounding rock during construction of Xiluodu underground caverns. It is shown that the method is reasonable and effective and of significant engineering applicability and practicality for fast feedback analysis of monitoring and stability assessment during construction of large-scale underground caverns.关键词
地下洞室/参数场辨识/开挖松动区/变形模量/位移反分析/空间效应Key words
underground cavern/ parameter field identification/ excavation damaged zone/ deformation modulus/ displacement back analysis/ spatial effect分类
交通工程引用本文复制引用
刘会波,肖明,张志国,陈俊涛..考虑空间效应的地下洞室爆破开挖松动区参数场位移反分析[J].岩土力学,2012,33(7):2133-2141,9.基金项目
国家重点基础研究发展计划973项目(No.2010CB732005) （No.2010CB732005）
国家科技支撑计划项目(No.2008BAB29B01) （No.2008BAB29B01）
中央高校基本科研业务费专项资金资助(No.20102060201000063). （No.20102060201000063）
