VERIFICATION OF FRACTAL FRACTURE NETWORK MODEL IN ROCKS

岩石分形断裂网络模型的验证

基本信息

批准号：
10450388
负责人：
NAKATSUKA Katsuto
金额：
$ 2.75万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10450388/
关键词：
ROCK FRACTURE FRACTAL MODEL NETWORK MODEL FRACTURE CONNECTIVITY PERMEABILITY THERMAL FRACTURE BORING CORE COMPUTER MODEL 熱収縮き裂フラクタルき裂ネットワーク連続性

项目摘要

The mono-fractal dimension and geometric features of outcropping fractures in welded tuff and tuffaceous mudstone, and artificial 2D network models have been investigated. The fractal dimension of observed fracture sets were determined using the box-counting method, and several geometric characteristics including length distribution, orientation, connectivity, number of fractures, and total length of fractures were quantified in order to construct a two-dimensional fracture network model. The space filling fracturing of a welded tuff was represented by a single fractal dimension from 1.6 mm through 10 m square scales, however, an universal fractal property could not be observed in the case of tuffaceous mudstone in spite of fractal behavior at each scale. These differences of fractal features between the welded tuff and the tuffaceous mudstone are considered to be related to the mechanism of fracture generation and different fracture mechanical characteristics.Computer-generated two-di … More mensional fracture network patterns of the welded tuff utilizing the observed fractal dimension and geometric relationships have been found capable of simulating the natural fracture patterns. This artificial model, which is founded on the uniform fractal property of a given fracture set from microscopic to 10m scales in the welded tuff, is capable of being expanded to larger scales on the basis of self-similarity.In addition, monofractality of the fracture network in the Kurihashi granodiorite in the Kamaishi mMine was evaluated using the box-counting method. The fracture maps for fractal analysis were obtained by tracing fractures including open cracks, hydrothermal alteration veins and quartz vein at the scale mostly 2.0x4.0mィイD12ィエD1 on the wall rock of E. L. 250mL drift. The distribution of alteration veins shows monofractality with similar dimension (D from 1.04 to 1.11), which means that the distribution of alteration veins ranging from 1.5x1.5mィイD12ィエD1 to 2.5x360mィイD12ィエD1 could be characterized by an unique monofractal dimension. Less

已经研究了焊接灰泥和灰泥泥岩中露头裂缝以及人工2D网络模型中露头裂缝的单骨尺寸和几何特征。使用盒子计数方法确定观察到的断裂组的分形维度，并定量了几种几何特性，包括长度分布，方向，连通性，断裂数和裂缝总长度，以构建二维骨折网络模型。焊接凝灰岩的空间填充压裂由单个分形尺寸从1.6 mm到10 m平方尺度表示，但是，尽管在每个尺度上都有分形行为，但在灰泥泥岩的情况下仍无法观察到通用分形特性。焊接的凝灰岩和灰泥浆泥岩之间的分形特征的这些差异被认为与裂缝产生的机制和不同的断裂机械特性有关。FUPUTER生成的两-DI…使用观察到的分离尺寸和几何关系的焊接凝灰岩的更月经骨折网络模式已发现了自然模拟的模式。这个人造模型建立在焊接凝灰岩中从微观骨骼到10m尺度的均匀分形特性，能够根据kurihashi Granodiorite在KAMASAMASISIRITE中的kurhashi rantiore网络在KAMASAMAISISINITE中使用KAMAISHI MMINE MMINE MMINE MMMILE MMMINE wAST-CONTIENT在kurihashi Granodiorite中的单个裂缝网络的单型，能够扩展到更大的尺度。通过追踪裂缝，包括开裂裂纹，水热蚀变静脉和石英静脉在内的骨折，大多数为2.0x40mil d12在E. L. 250ml漂移的壁岩石上，获得了分形分析的断裂图。改变静脉的分布显示出具有相似维度的单声道（从1.04到1.11的D），这意味着改变静脉的分布范围从1.5x1.5m d12ie D1到2.5x360m d12ie D1的特征是独特的单一尺寸。较少的