Calculation of Potential Liquefaction Zone of Tailings Pond Based on Three-dimension Modeling
In order to obtain the seismic liquefaction stability of tailings during the operation of tail-ings reservoir,this paper establishes a three-dimensional modeling framework for tailings reservoir.This framework creates a three-dimensional point cloud distribution based on topographic maps to generate spa-tial surfaces of the current situation and undisturbed terrain of tailings reservoir.The geological interface lay-ering is determined based on drilling data.The total stress method is used to calculate the three-dimensional dynamic response of the tailings reservoir under seismic loads,and the potential liquefaction area of tailings inside the tailings pond is determined based on the shear stress ratio comparison method.Taking a tailings reservoir as an example,a three-dimensional numerical calculation model is established to obtain the dy-namic response under the action of Park Field waves,the peak dynamic shear stress distribution at various points of the tailings reservoir,and the liquefaction distribution of tailings.The calculation results show that the framework can effectively establish a three-dimensional numerical calculation model for the tailings pond,and achieve three-dimensional liquefaction area calculation based on the shear stress ratio compari-son method under the given seismic wave action.The liquefaction area of the case tailings reservoir is mainly distributed inside the tailings pond,and there is no liquefaction area below the water level line at the bottom of the sub dam.
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