岩石孔隙结构的统计模型

被引:23
作者
鞠杨
杨永明
宋振铎
徐文静
机构
[1] 中国矿业大学煤炭资源与安全开采国家重点实验室
关键词
孔隙结构; 统计模型; 重构; 岩石; 应力分布;
D O I
暂无
中图分类号
TD313 [岩石力学性质];
学科分类号
摘要
通过砂岩CT扫描实验研究了岩石孔隙的几何特征与分布规律,给出了孔隙的形心坐标,孔隙间距、孔隙数和孔径的统计特征与各自分布的概率密度函数.利用Monte Carlo法和随机数算法生成了具有相同统计参数和概率密度函数的随机数序列来模拟孔隙位置、数量和孔径的随机分布.借助FLAC3D程序按照随机数序列分配的孔隙位置和统计特征构建了岩石三维孔隙结构模型.在此基础上,应用该模型研究了巴西圆盘劈裂破坏时的应力分布、单元破坏方式以及破裂单元的连通情况.研究表明:孔隙模型具有与真实岩石孔隙结构一致的孔隙统计特征和较好的几何相似性,该模型可以直观地反映孔隙特征对应力分布、破坏方式以及破裂连通性的影响。
引用
收藏
页码:1026 / 1041
页数:16
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