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金属矿山 ›› 2009, Vol. 39 ›› Issue (09): 29-32+88.

• 采矿工程 • 上一篇    下一篇

基于SEM的大理岩单轴受压全过程细观损伤量化研究

倪骁慧1,2,朱珍德1,2,武沂泉1,2
  

  1. 1.河海大学;2.岩土力学与堤坝工程教育部重点实验室
  • 出版日期:2009-09-15 发布日期:2011-04-26
  • 基金资助:

    国家自然科学基金项目(编号:50674040),国家自然科学基金、二滩水电开发有限责任公司雅砻江水电开发联合研究基金重点项目(编号:50539090),江苏省研究生培养创新工程项目(编号:CX07B-128z)。

SEM-Based Investigation on the Quantification of Meso-Damage of Marble under Uniaxial Compression

Ni Xiaohui1,2,Zhu Zhende1,2,Wu Yiquan1,2   

  1. 1.Hohai University;2.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering
  • Online:2009-09-15 Published:2011-04-26

摘要: 设计基于SEM的大理岩细观损伤全程数字化跟踪试验方案,对四川锦屏大理岩试样进行了单轴压缩细观损伤的全程试验。基于数字图像处理技术,对微裂纹的萌生、生长及贯通过程进行定量分析,提取试样在受荷过程中微裂纹的面积、方位角、长度等基本几何数据。然后利用统计学理论对获取到的32组试样微裂纹的损伤全过程的细观信息进行了统计分析,得到在单轴压缩过程中大理岩试样微裂纹的方位角、长度和间距服从变参数的广义极限分布这一结论。

关键词: SEM, 细观损伤量化, 广义极限分布

Abstract: A whole process digital tracking test scheme of marble meso-damage based on scanning electron microscopy(SEM) is designed for the uniaxial compression of a marble sample from Jinping,Sichuan.Based on the digital image processing technology,a quantitative analysis for the whole process of microfracture from initiation,growth to breakthrough is made,and the basic geometrical data such as area,azimuth angle and length of the sample in load-bearing process are extracted.Statistic analysis is made on the whole process meso-damage information of the micro-fractures of 32 samples by statistics theory.It is concluded that the azimuth angle,length and space of marble sample micro-fractures in the uniaxial compression process obey the regularity of generalized extreme value distribution of variable parameters.

Key words: SEM, Meso-damage quantification, Generalized extreme value distribution