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The resonant column test study of the central line underflow tailing sands

CAI Xiaoguang;HUANG Xin;MENG Fanchao;SHEN Chao;Institute of Disaster Prevention;  
The underflow tailing sands is the construction material of central line tailings dam.The resonant column tests are carried out on underflow tailing sands.The influence of moisture contents,dry density and consolidation pressure on dynamic shear modulus and damping ratio are discussed.The results show that:the maximum dynamic shear modulus increases with the increasing of consolidation pressure and dry density,and decreases with the increasing of moisture content.The maximum damping ratio decreases with the increasing of consolidation pressure and dry density,but is not sensitive to the change of moisture content.Under the condition of small shear strain(10-6~ 10-4),dynamic shear modulus increases with the increasing of consolidation pressure and dry density,but decreases with the increasing of moisture content; damping ratio decreases with the increasing of consolidation pressure and moisture content,but increases with the increasing of dry density.The results could provide basic data for the tailings dam dynamic response analysis.
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