Fractal geometry of two-dimensional fracture networks at Yucca Mountain, southwestern Nevada: proceedings
Fractal geometry of two-dimensional fracture networks at Yucca Mountain, southwestern Nevada: proceedings
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发表时间：
1985-12
影响因子：
2.3
通讯作者：
C. C. Barton-C.;E. Larsen
中科院分区：
文献类型：
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作者：
C. C. Barton-C.;E. Larsen
在内华达州西南部尤卡山同一中新世火山灰流凝灰岩中，暴露在3条214至260米路面上的裂缝痕迹已按1:50的比例绘制出来。这些图是通过三维地层裂缝网络绘制的二维剖面。所有裂缝的迹线长度均大于0.20 m。裂缝迹线长度呈对数正态分布。根据方位，裂缝没有明确的套。由于这种复杂裂缝轨迹网络的分形特征可能有助于模拟裂缝流动和断裂岩石的力学响应，因此对三幅图中的每一幅图进行了分析，以测试这种网络是否是分形的。这些裂缝网络被证明是分形的，并且在三个侧向分离的人行道上，分形维数(D)紧密聚集在一起（1.12,1.14,1.16），尽管从视觉上看，裂缝网络看起来非常不同。分形分析还表明，在0.20 ~ 25 m的迹线长度范围内，网络模式与尺度无关，超过两个数量级。， 7个无花果。
Fracture traces exposed on three 214- to 260-m{sup 2} pavements in the same Miocene ash-flow tuff at Yucca Mountain, southwestern Nevada, have been mapped at a scale of 1:50. The maps are two-dimensional sections through the three-dimensional network of strata-bound fractures. All fractures with trace lengths greater than 0.20 m were mapped. The distribution of fracture-trace lengths is log-normal. The fractures do not exhibit well-defined sets based on orientation. Since fractal characterization of such complex fracture-trace networks may prove useful for modeling fracture flow and mechanical responses of fractured rock, an analysis of each of the three maps was done to test whether such networks are fractal. These networks proved to be fractal and the fractal dimensions (D) are tightly clustered (1.12, 1.14, 1.16) for three laterally separated pavements, even though visually the fracture networks appear quite different. The fractal analysis also indicates that the network patterns are scale independent over two orders of magnitude for trace lengths ranging from 0.20 to 25 m. 7 refs., 7 figs.