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表征单元体(REV,或典型单元体)的存在是应用连续介质方法研究岩体问题的前提,因此,裂隙岩体表征单元体研究是岩体力学及岩体水力学中的一个基础问题,表征单元体的存在与否可以从不同物理参数的角度进行分析。从岩体块体化程度的角度对其存在性进行了较系统的分析,把岩体中由裂隙圈闭形成的孤立块体的总体积在岩体中所占体积百分比定义为裂隙岩体的块体化程度。介绍了GeneralBlock软件的基本分析过程,利用软件建立了三维裂隙岩体模型。根据国际岩石力学学会的裂隙分级,针对5个延展性级别、7个间距级别建立了35种岩体结构模型。利用GeneralBlock对这35种岩体进行了块体识别,分别讨论了这35种岩体结构的块体化程度随着模型范围变化的波动情况。由于所建立的岩体结构模型是随机的,对每种结构的每个研究范围进行了5次随机实现。结果表明,对所有的35种岩体,表征单元体的尺寸在4～8倍间距之间,不超过8倍间距。
The existence of characterizing unit bodies (REVs, or typical unit bodies) is a prerequisite for the study of rock mass problems by using continuum methods. Therefore, the study of unit cell of fractured rock mass characterization is a basic problem in rock mass mechanics and rock mass hydraulics. Characterization The existence of the unit body can be analyzed from the perspective of different physical parameters. From the perspective of the degree of block rock mass, its existence is systematically analyzed. The volume percentage of the total volume of the isolated block formed by fractures in the rock mass in the rock mass is defined as the ratio of The degree of block. The basic analysis process of GeneralBlock software is introduced, and the software of 3D fractured rock mass model is established. According to the fracture classification of the International Society of Rock Mechanics, 35 rock mass structural models have been established for 5 levels of ductility and 7 pitches. The general block was used to identify the 35 rock masses, and the variation degree of these 35 rock mass structures as the range of the model was discussed respectively. Since the model of rock mass structure is established randomly, each research area of each structure is randomly generated 5 times. The results show that for all 35 rock masses, the size of the characterization unit is between 4 and 8 times the spacing, no more than 8 times the spacing.