Breakage Characteristics of Granular Micaschist and its Fractal Description

Abstract:

Taking the granular micaschist of a strip-mine as study object, a lot of compaction and breakage tests on granular rock materials were carried out at different grading conditions, on that basis, the breakage properties and its changing regularity were analyzed. Then, the feasibility using fractal dimension D to describe the breakage ratio and the relevances of D with coarse granule content and breakage ratio Bg and B5 were discussed. The results show that: (1) the greater initial coarse particle content is, the more obvious the broken degree of granular micaschist is, the higher the breakage ratio is. When the coarse particle content is less than 10%, the material grading curve before and after compaction is almost coincidence, that is, the broken phenomenon will no longer occur. (2)the change trend of fractal is inversely related to the coarse granule, that is D will increase with the decrease of coarse granule. But the fractal dimension D after breakage is bigger than pretest, and the rangeability of D before and after compaction has a positive correlation with the coarse particle content. (3)there is a better quadratic function elevance between D and Bg, B5, and the correlation coefficient of Bg and D reach up to 0.9997, it illustrates that using the fractal dimension to represent the breakage ratio of granular material is completely feasible.

• Periodical: Advanced Materials Research (Volume 598)
• Pages: 552-555
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.598.552
• Online since: November 2012
• Authors: Ke Gang Li, Wei Liang, Dong Pu Zheng
• Keywords: Breakage Characteristic, Breakage Ratio, Fractal Dimension, Granular Micaschist, Mechanical Testing

References

[1] KONG Dezhi, ZHANG Qiguang, ZHANG Bingyin et al. Journal of Tsinghua University(Sci & Tech), 2009,49(6):811-815.(In Chinese)

[2] XIE Heping. Chinese Journal of Geotechnical Engineering, 1992,14(1):14-24.(In Chinese)

[3] XIA Chun, LIU Hao-wu. Journal of Southwest JiaoTong University,2002,37(2):186－189. (In Chinese)

[4] XU Yong-fu, HUANG Yin-chun. Chinese Journal of Geotechnical Engineering, 2006,28(5):635-638. (In Chinese)

[5] Jaroslav Feda. Engineering geology, 2002,(63): 93-98.

[6] ZHOU Zhijun, NAN Haolin, MENG Mei. Subgrade Engineering, 2007,5:95-96. (In Chinese)

[7] MARSAL R J. Journal of Soil Mechanics and Foundations Division,1967,93(2):27-43.

[8] WANG Long, XU De-xing. Journal of Harbin University of Civil Engineering and Architecture, 2000,33(6):129-132. (In Chinese)

[9] JIN Yiwen. Hangzhou: Zhejiang University Press, 1988.11. (In Chinese)