大理岩细观破坏行为的实时观察与分析

在配置高精度单轴拉伸－压缩加载台的扫描电子显微镜（ＳＥＭ）上，对大理岩试样在单轴压缩荷载条件下所出现的细观变形和强度特性进行实时、动态的观察与研究，阐述大理岩初始细观组构及尖力水平对裂纹产生、扩展方式的影响和其细观破坏过程的力学行为与宏观力学性能的关系。并介绍了用于ＳＥＭ下单轴压缩荷载实验的岩石试样的制备方法和实验技术。

Real Time Observation and Analysis of Meso Fracture Behavior of Marble Samples

A real time and dynamic investigation of the meso fracture behavior and strength characteristics of marble samples is carried out under a scanning electric microscope (SEM) instrumented with axial tensile/compression loading device of high precision. The influences of marble initial meso fabric, the influences of stresses to the initial meso fabric and magnitude of stress of the marble on the fracture creating and its pattern of extending are discussed. Also discussed is the relationship between the mechanical behavior of meso fracture and the macro mechanical performances. The method of preparing the rock samples used for the axial compression loading test under the SEM is also introduced.