分形节理岩体强度与变形尺度效应的试验研究

根据强度与变形尺度效应的研究需要，试验研究了脆性岩石相似模拟材料的配比，提出了预置材料产生模拟节理的方法，解决了随机分布节理试件的制作问题。采用分形分布节理模拟材料试件，研究了脆性岩体轴向抗压强度与变形的尺度效应，获得的规律与实际岩体尺度效应规律一致，并发现岩体变形的尺度效应并非完全由节理闭合和剪切破坏引起，在节理剪切破坏之前，主要是由节理的剪切变形增大引起的。

Experimental study of scale effects in strength and deformation of fractal-joint rock masses

For investigating the scale effects in strength and deformation, an experimental study of constitution ratio of similar simulation materials of brittle rocks has been carried out; in which a method of generating simulated joints with initial materials has been provided; and a method of producing randomly-distributed-joint specimens has also been developed. We have then completed an experimental study of scale effects in axial compressive strength and deformation using the prepared specimens of fractal-joint rock mass with simulated materials, and have obtained consistent results comparing with the same study with the natural rock masses. We conclude that the scale effect in rock mass deformation is not completely resulting from the joint closure and shear degradation, while the scale effect in rock mass deformation is mainly due to the augment of shear deformation before the shear degradation happens.