岩石细观损伤演化与宏观变形响应关联研究

基于岩石全息干涉图的判读和统计分析,高精度定量获取了单轴压缩变质砂岩、板岩和花岗岩岩石试样变形破坏各阶段的细观裂纹演化及其与应力应变的对应关系,分析了岩石细观损伤演化对宏观变形的贡献;在岩样裂纹演化统计值与宏观力学响应的定量研究基础上,建立了试样表面裂损度和宏观变形响应之间的关系,岩石细观损伤引起变形特性的改变可以通过计量岩石表面裂损度加以描述,直观演示了岩石细观损伤演化与宏观力学响应的关联,能够有效地为岩石工程稳定性评价提供理论支撑。

Study on the Relationship between Meso Damage Development and Macro Deformation of Rock under Uniaxial Compression

Based on the interpretation of rock's hologram and the statistical analysis of meso-crack,the meso-crack development in the stage of deformation and failure of rock specimens under uniaxial compression and its strain-stress value are quantitatively obtained with a high precision.The specimens include meta-sandstone,slate and granite.The contributions of meso defects evolution of rock to its maro deformation are analysised.According to the quantitative investigation of the statistical value of rock meso defects evolution and the response of its macroscope mechanics,the relationship of surface fracturing-damage degree and maro-deformation in the specimens is established.With surface fracturing-damage degree on the specimens,the characters of rock deformation resulted from meso defects development can be described.The relationship of rock meso damage evolution and its maro mechanics response can be visually shown.It can provide an effective theoretical support for the analysis of stability in rock engineering.