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STUDY ON A SIMPLIFIED PROCEDURE FOR EVALUATING LIQUEFACTION POTENTIAL OF TAILINGS DAM
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Abstract Based on the present study results of evaluating liquefaction potential of tailings dam，a method considering the effect of amplification coefficient and reduction coefficient at different distances and different stiffness is presented to calculate the dynamic shear stress. Through a lot of in-situ standard penetration tests(SPT) and dynamic triaxial tests，the effect of fine content on dynamic liquefaction property is studied. A formula is given to modify the effect of the fine content on the liquefaction strength. By considering effective overburden stress，diameter of borehole，rod length，hammer type and fine content，the corresponding correction factors are calculated by the given formulas. Comparing the dynamic shear stress with the liquefaction resistance，the anti-liquefaction safety factor is used to evaluate the liquefaction degree. At last，a simplified procedure is presented to evaluate the liquefaction potential of tailings dam by taking plenty of correction factors into account. The given method is programmed with Visual Fortran language in order to spread the method more conveniently.
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Received: 09 October 2005
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LI Botao1, 2, 3, TAN Yuxuan1, LIN Haifei4, 5*, WEI Jianping1, 2, 3, ZHANG Hongtu1, 2, 3, LI Shugang4, 5, WEI Zongyong4, 5, WANG Pei4, LUO Rongwei4, LIU Yanwei1, 2, 3. Mechanical properties and mesoscopic damage evolution of coal under liquid-nitrogen freezing at different initial temperatures[J]. , 2026, 45(6): 1757-1772. |
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