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.

Discussion on computing effective reinforcement depth of soft soil foundation by dynamic compaction based on critical cyclic shear stress ratio;

In the case of two-dimensional plane stress condition, the cyclic stress induced by earthquake in earth includes horizontal tangential cyclic shearing stress, τvh, vertical cyclic normal stress, σy, and horizontal cyclic normal stress, σh.

The cyclic shearing stress induced by earthquake in earth includes cyclic normal stress difference, [σvd - σhd]/2, and horizontal tangential cyclic shearing stress, τhd These two componentS of cyclic shearing stress are the main factors complicating procedures for assessing the deformation or stability of earth and earth structures during earthquake.

In this paper,it is validated by comparing simulation and experiments results that good precision of simulation could be obtained with this friction model,and the effect of cooling fluid on the cutting could be well simulated by reducing the shear flow stress of workpi.