工程地质学报2017，Vol.25Issue(2)：359-366,8.DOI:10.13544/j.cnki.jeg.2017.02.013
三轴压缩条件下千枚岩破裂与能量特征研究
RUPTURE AND ENERGY PROPERTIES OF PHYLLITE UNDER TRIAXIAL COMPRESSION CONDITION
摘要
Abstract
In order to study the influence of confining pressure to deformation and failure characteristics and energy evolution characteristics of phyllite,the conventional triaxial compression test is carried out with MTS815 servocontrolled rock mechanical test system.The results show the follows.As the confining pressure increases,the failure mode of phyllite changes from shear failure to mixed tensile-shear failure.The point k is the intersection of the curve of elastic strain energy and the curve of dissipation,before the k point of energy accumulation and after the k point of energy dissipation,respectively.In the early stage of loading,the curve of total energy and axial strain is concave curve,where the energy growth rate is to rise.In the later stage of loading,the curve of total energy and axial strain is convex curve,where the growth rate of energy reduces.At the point of peak strength,the total energy and energy storage limit has a linear relationship with the confining pressure.Confining pressure can hinder the crack propagation and energy release.关键词
千枚岩/三轴压缩/破裂特征/能量演化/弹性能/耗散能Key words
Phyllite/Triaxial compression/Rupture characteristics/Energy evolution/Elastic energy/Dissipation energy分类
建筑与水利引用本文复制引用
蒲超,孟陆波,李天斌..三轴压缩条件下千枚岩破裂与能量特征研究[J].工程地质学报,2017,25(2):359-366,8.基金项目
国家自然科学基金项目(41230635),地质灾害防治与地质环境保护国家重点实验室课题(SKLGP20132004),四川省教育厅项目(16ZA0095)资助. （41230635）
