【摘要】 鉴于当前尾矿坝在线监测系统中关于浸润线深度预警指标存在的难定量化问题,基于尾矿库概化模型,假定三种平均坡度,四种浸润线深度,采用FLAC2D软件试用版对尾矿坝的抗滑稳定性程度进行了模拟分析,得到了每种条件下尾矿坝的剪应变云图和相对应的抗滑稳定安全系数,比较了尾矿坝安全系数随着平均坡度以及浸润线深度的变化情况,结果发现:平均坡度对尾矿坝的稳定性影响显著,尾矿坝的整体抗滑稳定系数随平均坡度的减小逐渐增大;此外在平均坡度相同的前提下,浸润线深度自5m增加至10m的区间内,浸润线每增加1m,安全系数提高的程度最大约为5%左右,随后提高的程度逐渐减小,直至稳定在3%左右。此结果为在线安全监测系统的预警提供了技术支持。更多还原

【Abstract】 The phreatic line is of key importance to the performance of tailing dam.Currently,more and more online safety monitoring systems are available for tailing dams,which provide the safety stability of tailing dams by monitoring the deformation,seepage and also the phreatic line depth and so on.This study aimed to the difficulty in the determination of quantitative warning variables.Three different values of average inclination and four different values of phreatic line depth were assumed on the basis of tailing dam sketch model.The factors of safety and shear strain rate contours of the current tailing dam were obtained from the analysis results of the FLAC2D trial version 5.0.The results showed that the factor of safety became gradually larger with the reduction of average inclination of tailing dam.For the same average inclination,the factor of safety increased by 5% with one meter of phreatic line depth increment when the phreatic line depth varied from 5 meters to 6 meters.The extent of increment in factor of safety tended gradually to be lower until 3%.The above found results can provide the administrator with the timely factors of safety of the current tailing dam with online safety monitoring system.更多还原