岩体多尺度异质性及其力学行为

异质性是岩体的重要属性之一，从岩体的物质组成到结构特征，再到微宏观力学行为表现，异质性现象普遍存在。本文在梳理已有研究成果的基础上，从岩体的细微观异质性、结构面异质性和宏观异质性3个不同的尺度，对异质性的产生原因、表现特征、力学效应和时空演化规律等进行阐述，并介绍了相关研究方法以及异质性在不同尺度上的差异表现。岩体异质性的研究，是岩体工程地质力学理论体系的延伸，而多尺度的研究方法也成为全面揭示岩体变形破坏机制的一种有效手段。

MULTI-SCALE HETEROGENEITY OF ROCK MASS AND ITS MECHANICAL BEHAVIOR

Heterogeneity is one of the important properties of rock mass. Heterogeneity is widespread in rock mass from the material composition to structural characteristics to micro-macro mechanical behavior. On the basis of reviewing the existing researches, the causes, characteristics, mechanical effects and temporal and spatial evolution of rock mass heterogeneity are described from three different scales including micro heterogeneity, structural heterogeneity and macro heterogeneity. The relevant study methods and the different manifestations of heterogeneity at different scales are introduced. The study of rock mass heterogeneity is an extension of the theoretical system of engineering geomechanics of rock mass. The multi-scale research method has also become an effective means to fully reveal the deformation and failure mechanism of rock mass.