不同实验条件下大理岩主破裂的分数维

地震地质 ›› 1993, Vol. 15 ›› Issue (2): 157-163.

不同实验条件下大理岩主破裂的分数维

李彪, 马胜利, 张流

国家地震局地质研究所, 北京 100029

收稿日期:1990-08-31 修回日期:1992-07-31 出版日期:1993-06-02 发布日期:2009-11-25
基金资助:
国家自然科学基金(4870246);地震科学联合基金(880247)资助

FRACTAL DIMENSION OF MAIN FRACTURES OF MARBLE UNDER DIFFERENT EXPERIMENTAL CONDITIONS

Li Biao, Ma Shengli, Zhang Liu

Institute of Geology, S S B, Beijing 100029

Received:1990-08-31 Revised:1992-07-31 Online:1993-06-02 Published:2009-11-25

摘要/Abstract

摘要： 以大理岩为样品,在围压10～60MPa下进行了三轴压缩条件下的变形破坏实验,统计并分析了主断裂面的分维几何特征。在环境因素和介质条件相同的情况下,D值不随标本尺度变化,表明岩石破裂结构的确具有自相似性。围压是影响D值大小的一种因素,在约35MPa以下,D值随围压增加而降低;在约35MPa以上,随围压的增加而增加。提出在分析野外断层迹线的分维特征时,尚应考虑断层形成时的环境条件及其可能的随深度的变化。

关键词: 分数维, 岩石破裂试验, 围压, 三轴压缩试验

Abstract: Marble samples with sizes from ψ20×44mm to ψ90×198mm are deformed in triaxial compression under confining pressures from 10 to 60MPa. The fractal dimension of main fractures is calculated and analysed. D value does not change with sample size when the environment and material conditions are the same, indicating that fracture is of self-similarity. Confining pressure is one of factors affecting D value. As confining pressure increases, D value decreases below 35MPa and increases above 35MPa, suggesting that when fractal geometry of fault traces is analysed in field, the environmental conditions in which the fault is formed and the possible change with depth should be considered.

Key words: Fractal dimension, Fracture model experiments, Conflning pressure, Triaxial compression test

李彪, 马胜利, 张流. 不同实验条件下大理岩主破裂的分数维[J]. 地震地质, 1993, 15(2): 157-163.

Li Biao, Ma Shengli, Zhang Liu. FRACTAL DIMENSION OF MAIN FRACTURES OF MARBLE UNDER DIFFERENT EXPERIMENTAL CONDITIONS[J]. SEISMOLOGY AND GEOLOGY, 1993, 15(2): 157-163.

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