Study on the Granular Shear Strength Parameters of Dumping Site

Abstract:

Apparent particle size grading is the important characteristic of super-high bench dumping site, and the critical factors with the impact of its stability and disaster prevention are the fragmentation distribution and shear strength parameters of granular. With the copper mine dumping site which had the feature of apparent particle size grading, the thesis carried out the study of on-site particle size investigation and indoor laboratory. The particle-size distribution law with the changing of dumping-site height was analyzed and quantitative relationship between the fragmentation distribution and shear strength parameters of granular was discussed. The research results indicated that coarse-grain contents and maximum grain size were increased significantly according to the decreasing of dumping-site height, which showed that the dumping-site had the feature of apparent particle size grading. The coarse particle content in the grain size composition and internal friction angle φ of shear strength parameters increased with the obvious increment of the distribution value B. The relationship between distribution value B and the internal friction angle φ could be expressed by exponential function curve.

• Periodical: Applied Mechanics and Materials (Volumes 256-259)
• Pages: 358-361
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.256-259.358
• Online since: December 2012
• Authors: Xiang Yun Kong, Guang Jin Wang, Xiao Chao Zhou
• Keywords: Accumulate Granular, Dumping Site, Fragmentation Distribution, Shear Strength

References

[1] Li Lin, Ma Qingli. The research on regularity of distribution and rock fragmentation composition analysis of JianShan dump in LanJian iron mine [J]. Sichuan Metallurgy,1990,(3): 1~8

[2] Haltanaka M, Suzuki Y, et al. Cyclic undrained shear properties of high quality undisturbed Tokyo gravel[J]. Soils and Foundations, Japanese Society of Soil Mechanics and Foundation Engineeing, 1988, 28(4): 57~68.

DOI: 10.3208/sandf1972.28.4_57

[3] Rollins K M, Evans M D, et al. Shear modulus and darnping relationships for gravels[J]. Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 1998, 124(5): 396~405.

DOI: 10.1061/(asce)1090-0241(1998)124:5(396)

[4] Guo Qingguo. The experimental study on the stress-strain character and nonlinear parameter about coarse grain soil[J]. Journal of Hydraulic Engineering,l983(1l): 44~50.

[5] Hua Junjie, ZhouWei, Chang Xiaolin etc. The size effect research upon the stress deformation of rockfill[J]. Chinese Journal of Rock Mechanics and Engineering, 2010,29(2): 328~335

[6] Shi Weicheng, Zhu Jungao, ZhangBo etc.The research for the strength properties of coarsegrain in plane strain condition[J]. Chinese Journal of Geotechnical Engineering,2011,33(12): 1974~(1979)