Mechanical behavior of a rock fracture and mechanisms for the scale effect

本文从实验和理论两个方面研究了岩石裂隙力学行为的尺度效应机理，指出在正应力和剪应力作用下裂隙闭合和剪切行为的尺度效应主要取决于孔径的标准差。此外，我们提出了一种方法来估计的水力传导性的裂缝与任意方向的主应力轴，并说明了在水力transmucosity与裂缝的方向的变化。

In this study, we experimentally and theoretically investigated mechanisms for scale effect on the mechanical behaviors of a rock fracture, and showed that the scale effect on the closure and shear behavior of a fracture under normal and shear stresses primarily depends on that on the standard deviation (SD) of the aperture. Furthermore, we proposed a method for estimating the hydraulic conductivity of a fracture with an arbitrary direction in the axes of principal stresses, and illustrated the variation in the hydraulic transmissivity with the direction of the fracture.