NUMERICAL ANALYSIS OF SYNCRUDE TAILINGS DAM WITH CONSIDERATION OF STRENGTH ANISOTROPY OF FOUNDATION MATERIAL

2005 ◽  
Author(s):  
HOSSEIN SOLTANI-JIGEH ◽  
ABBAS SOROUSH
Keyword(s):  
Numerical Analysis ◽  
Tailings Dam ◽  
Strength Anisotropy

Influences of Loading Mode and Construction Speed on Position of Phreatic Line of a Tailings Dam

2011 ◽  
Vol 261-263 ◽  
pp. 1724-1728
Author(s):  
Wei Dong Lei ◽  
Tie Lin Fu ◽  
Rui Chen ◽  
Wen Bin Luo
Keyword(s):  
Numerical Analysis ◽  
Tailings Dam ◽  
Middle Term ◽  
Loading Mode ◽  
The Stability ◽  
Service Duration ◽  
Negligible Influence

The location of phreatic line of a tailings dam is of significant importance on the stability of the tailings dam. In this study, extensive numerical analysis in ABAQUS have been performed to study the influences of loading mode and construction speed on position of the phreatic line of tailings dam in the process of construction from the existing elevation of 59 m to the final elevation of 100 m. The results show that the location of the phreatic line changes very little at the lower part of the dam; by contrast, the location of phreatic line dramatically changes at the upper part of the dam. At a certain construction speed, loading mode has negligible influence on the position of the phreatic line during the duration of one rising round for the tailings dam. The construction speed has more significant influences on the position of phreatic line in the middle term in the service duration of the tailings dam than in the later period.

Strength Anisotropy of a Tailings Sand and its Effect on Stability of a Tailing Dam

2011 ◽  
Vol 261-263 ◽  
pp. 1719-1723
Author(s):  
Rui Chen ◽  
Zai Hong Li ◽  
Wei Dong Lei ◽  
Wen Bin Luo
Keyword(s):  
Shear Strength ◽  
Stability Analysis ◽  
Slip Surface ◽  
Friction Angle ◽  
Engineering Practice ◽  
Shear Direction ◽  
Tailings Dam ◽  
Strength Anisotropy ◽  
Tailings Sand ◽  
Current Engineering

In current engineering practice, the effect of strength anisotropy on stability analysis of tailings dam is often ignored. This paper presents direct shear test results on a tailing sand with different angles between shear direction and bedding plane. It is found that shear strength of this soil is significantly directional dependent. The variations in peak friction angle are about 11o, which is approximately 28.3% of the minimum value. The effect of strength anisotropy on stability of a tailings dam is also investigated. The analysis considering anisotropic strength shows a smaller factor of safety and shallower most critical slip surface as compared with isotropic strength model that is used in current engineering practice. To achieve more accurate stability analysis of tailings dams, it is suggested to take into account shear strength anisotropy of tailings soils.

Sign in / Sign up

Export Citation Format

Share Document