尾矿库地震动力响应特征研究  

Research of earthquake dynamic response characteristics of tailing dam

作　　者：崔冠哲 唐正光[1] 徐则民[1] 

机构地区：[1]昆明理工大学土木工程系,云南昆明650500

出　　处：《地震工程与工程振动》2017年第2期189-196,共8页Earthquake Engineering and Engineering Dynamics

基　　金：昆明理工大学人才培养基金项目(KKSY201306142);云南省交通厅科技项目(云交科2014A(02))~~

摘　　要：为研究尾矿库地震动力响应特征,本文依托象冲尾矿库,建立1:300缩尺的振动台试验模型,布设14个加速度传感器,在4 m×4 m振动台进行12个工况动力模型试验;采用三维激光扫描仪精准地采集尾矿库模型的坐标点云数据,建立三维数值模型,进行地震动力数值模拟。最后结合振动台试验结果的放大系数与数值模拟结果的永久位移云图、应力云图,深入研究尾矿库的动力响应特征。分析结果表明:尾矿库的动力响应与作用地震波的加速度峰值呈负相关的关系;含水率的提高对尾矿坝的动力响应有一定的放大作用,尤其是对滩面及外坡的下部的影响较为明显;尾矿库与地基山体和初期坝的接触位置处,更容易出现较大的应力,形成介质突变效应;永久位移随着高程的增加而变大,表明存在高程效应。In order to research the dynamic response characteristic of tailing dam, this paper based on Xiangchong tailing dam, according to 1：300 reduced scale, built a shaking table test model and lay 14 acceleration sensors, then total dynamic simulation tests of 12 condition tests were completed on 4 m × 4 m shaking table. Three-dimen- sional laser scanner that accurately collected point data of tailings dam and built a three-dimensional numerical model and then completed numerical simulation of earthquake. Finally, combined amplification factors of test result of shaking table with permanent displacement contours of numerical simulation result to deeply research the dynamic response characteristic of tailing dam. The results showed ： dynamic responses of tailing dam and acceleration peak of seismic waves had a negative correlation relationship ; the increase of moisture content had some amplification effects on dynamic responses of the tailing dam, especially the effects of beach surface and low part of outer slope were more obvious; the contact parts of tailing dam and foundation of mountain and initial dam were more prone to appear greater stresses, which generated medium mutagenic effect; when the elevation became higher, the perma- nent displacement increased, which indicated the presence of altitude effect.

关 键 词：尾矿库 振动台 数值模型 放大系数 动力响应 

分 类 号：TD926.4[矿业工程—选矿] TD32