长江科学院院报2016，Vol.33Issue(10)：131-134,144,5.DOI:10.11988/ckyyb.20150684
直剪条件下不同宽度岩桥破坏特征试验研究
Experimental Study on Failure Characteristics of Rock Bridge of Different Widths under Direct Shear
摘要
Abstract
The failure characteristics of rock mass under different widths of rock bridge and normal stresses were re -vealed through mechanical model test in association with analyzing the characteristic parameters of acoustic emission during the failure process.Results showed that with the increase of the width of the rock bridge , the fluctuation of failure surface and the roughness of the surface both increased .With the increase of normal stress, the peak shear stress increased continuously but the degree of fluctuation and roughness of the failure surface decreased .The failure modes of rock bridges of different widths under different normal stresses varied , including cutting damage, tensile-shear composite failure, and shear failure.The characteristics of acoustic emission were consistent with the failure process of the rock bridge, and the peak value of AE events, which appeared after the peak of shear stress , in-creased with the increase of the width of rock bridge and the normal stress .The results provide basis for identifying different destruction stages of rock bridge with different widths .关键词
直剪试验/岩桥/声发射/法向应力/破坏特征Key words
direct shear test/rock bridge/acoustic emission/normal stress/failure characteristics分类
建筑与水利引用本文复制引用
冉耀,陈国庆,黄博睿,张晓东,陈丛姗..直剪条件下不同宽度岩桥破坏特征试验研究[J].长江科学院院报,2016,33(10):131-134,144,5.基金项目
国家自然科学基金项目（41130745，41521002，41272330）；成都理工大学大学生课外科技立项项目 （）
