以尹庄尾矿库为工程背景,通过现场沉积滩面及钻孔取样进行室内筛分试验、渗透试验,获得了上游式尾矿颗粒在库内沉积规律,建立了尾矿库概化地质模型,并通过三轴试验得到了概化模型中不同地层尾矿的应力应变关系;以测定的饱和含水量、残余含水量及饱和渗透系数及各尾矿颗粒级配曲线为基础,利用Fredlund-Xing模型获得了土-水特征曲线及渗流模型;以有效应力理论为依据,建立上游式尾矿库流-固耦合数学模型,对该库的应力场与渗流场进行分析,获得了坝体的应力场及孔隙压力的分布规律.研究成果可为尾矿库的设计、施工和安全生产提供技术支撑.%Taking the Yizhuang tailings dam as project background,through indoor screening test and penetration test of the scene deposition Beach surface and drilled sampling,the deposition law of particle are obtained. A generalization of geolog-ical model is established;and through three triaxial test on the general model of different strata tailings obtained its stress-strain relationship,the saturated water content,basis on the residual moisture content,aturated permeability coefficient and the tail-ings grading curve,using Fredlund-Xing model to obtain the soil-water characteristic curve and flow models,With the theory of effective stress,establish the upstream tailings reservoir fluid-solid coupling mathematical model,By analysed the stress field and the seepage field of the tailings dam,the distribution of stress field and pore pressure are obtained,The research results can provide instructor for the design,construction and safe production of tailings dam.
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