工程地质学报2016，Vol.24Issue(3)：363-368,6.DOI:10.13544/j.cnki.jeg.2016.03.004
含裂隙岩石的受压破坏机理研究
LABORATORY TESTS ON FAILURE MECHANISM OF FRACTURED ROCK UNDER COMPRESSION
摘要
Abstract
The crack propagation and strength of fissured rocks under applying loads are significant for the study of rock deformation mechanism.Mortar fractured specimens have been simulated as fissured rock in the uniaxial compression experiment.Different crack length, the initial propagation angle of specimens and initial crack strength have been obtained by setting 9 experimental conditions.They have 3angles of 45°, 60° and 75°and 3 crack length of 45mm, 60mm and 75mm.The compression failure mechanism is also analyzed .The results show the following. When the crack length is the same, the initial crack strength is increased by the increase of angles .When the angle is increased from 60°to 75°,the initial crack strength is increased faster.When the crack angle stays at a certain level, the initial crack strength is decreased by the increase of the crack length .By employing the theory of maximum circumferential stress, the failure mechanism of fractured specimens under compression is interpreted . Theoretical expression of crack propagation angle is acquired .By comparison, it is found that the measured and theoretical values of crack propagation angle are in good agreement .关键词
实验研究/裂隙岩石/裂隙扩展角/初裂强度/破坏机理Key words
Experimental study/Fractured rock/Crack propagation angle/Initial crack strength/Failure mechanism分类
建筑与水利引用本文复制引用
唐红梅,张金浩,陈洪凯..含裂隙岩石的受压破坏机理研究[J].工程地质学报,2016,24(3):363-368,6.基金项目
国家自然科学基金（11272185，51378521），重庆市重点自然基金项目（cstc2013jjB30001）资助． （）
