岩土力学2018，Vol.39Issue(4)：1517-1524,8.DOI:10.16285/j.rsm.2016.0843
基于声发射的岩石破裂应力场动态反演
Dynamic inversion of rock fracturing stress field based on acoustic emission
摘要
Abstract
This study aims to investigate the dynamic stress field during the process of rock failure.Firstly,physical model experiments were conducted to obtain the results of acoustic emission (AE) in the laboratory.According to the measured results,an equation was established for describing characteristics of the rock mesoscale damage based on the energy dissipation theory.Then this equation was implemented to FLAC3D software by using the FISH language.The improved equation can not only automatically search rock units within the damage scope of AE,but also weaken mechanical parameters of meso units.Finally,the relatively true rock fracture dynamic stress field was successfully acquired.The calculated results of rock failure stress field showed good agreement with the experimental results,which verified the rationality of mesoscale damage characterisation method.Simultaneously,the obtained dynamic rock fracturing stress field can not only explain the damage causes from the point view of rock mechanics,but also can predict the location of next rock failure.However,this method still has some limitations,and it needs for further explorations.关键词
声发射/应力场/FLAC3D数值模拟/动态反演Key words
acoustic emission/stress field/FLAC3D numerical simulation/dynamical inversion分类
建筑与水利引用本文复制引用
刘飞跃,杨天鸿,张鹏海,周靖人,邓文学,侯宪港,赵永川..基于声发射的岩石破裂应力场动态反演[J].岩土力学,2018,39(4):1517-1524,8.基金项目
国家重点基础研究发展计划项目(No.2013CB227902) （No.2013CB227902）
国家自然科学基金资助项目(No.51574059,No.51404067).This works was supposed by the National Program on Key Basic Research Project of China(2013CB227902) and the National Natural Science Foundation of China(51574059,51404067). （No.51574059,No.51404067）
