摘要
利用Monte-Carlo法在计算机上生成岩体结构面三维网络图,对结构面切割后的块体分形维进行分析,结果表明块体数量与结构面数量有明显的幂律关系,即分形规律;小于某体积尺度的块体数量与体积尺度也存在分形关系,结构面数目改变时,该分形维基本不变。另外,块体数目与测量空间大小之间的分维数DNL随着结构面数目的增加即破碎程度的增加而增加,这表明DNL可以作为三维岩体质量评价的一种有效参数,这为岩体质量评价体系提供了一个新思路和新方法。
Three - dimensional network diagram of rock structural plane is generated by Monte - Carlo method and the fractal dimension of rock block cut by structural plane is analyzed. The results show that the obvious power law between the number of blocks and structural plane exists, namely the fractal law; the fractal relationship between the number of rock block that is smal- ler than a certain volume and the volume dimension has been proved as well. The fractal dimension keeps stable even though the number of structural plane changes. In addition, the fractional dimension （ DNL ） between the number of blocks and the size of measuring space is increased with the increasing degree of fragmentation, which shows that D^L can be used as an effective param- eter to evaluate 3D rock mass quality.
出处
《人民长江》
北大核心
2013年第4期35-38,共4页
Yangtze River
关键词
结构面
分形维数
岩块
岩体质量评价
structural surface
fractal dimension
rock block
evaluation of rock quality
