岩石节理粗糙度系数的分形特征  

The fractal behaviour of joints roughness coefficient of rock mass

作　　者：杜时贵[1] 潘别桐[1] 

机构地区：[1]中国地质大学,武汉470074

出　　处：《水文地质工程地质》1993年第3期36-39,共4页Hydrogeology & Engineering Geology

摘　　要：岩石节理粗糙度系数JRC是估算节理抗剪强度和变形指标最重要的参数。通过对简易纵剖面仪获取的节理表面轮廓曲线的分形研究,讨论了节理表面轮廓曲线的自相似性和JRC的自相似性,并根据实测统计资料的分析,指出了分形理论研究JRC的适用条件和有效的使用方法。由实测统计资料的JRC尺寸效应自相似性分析,认为JRC尺寸效应具分形结构。本文介绍了一种确定JRC尺寸效应分维数D的方法,由此确定的分维数D具有明确的物理意义。Joint roughness coefficient (JRC) is the most importana factor in the evaluation of the shear strength and deformation parameters of rock joints. Based on the analysis of fractal behaviour of joint surface profilc curve which is completed by simple profile instrument, the self-similarity of profile curve and JRC is discussed first, Then, through the analysis of the statistical data, of JRC two accurate methods of evalaating JRC by fractal theorg are put forward.It is found through self-similarity study that JRC scale effects can be treated as fractal. Farther more, a method of evaluating fractal dimension (D) of JRC scalc effects is given. Fractnl dimension (D) gotten by this method has a definite physiccal meaning.

关 键 词：岩石 节理 粗糙度 分形特征 

分 类 号：P583[天文地球—岩石学]