尾矿库排渗系统反滤设计研究进展

摘要

水平排渗管、辐射井为当前典型的尾矿库排渗系统,无纺土工布为排渗管(辐射管)主要反滤材料,但其反滤层缺乏严格的反滤设计,反滤特性差异较大.通过总结典型反滤层结构及各组成部分对反滤性能的影响、现有反滤准则及反滤试验技术、反滤层耐久性研究进展,总结了尾矿料统计特征、土工布特征参数、土工布反滤层反滤过程等方面的研究进展,指出了尾矿库排渗系统反滤设计领域今后的几个研究方向:尾矿料物理力学特性对反滤层的影响研究,土工布特征表征方法研究,土工布特征参数测量方法研究,长期反滤试验方法与试验设备研究,土工布反滤层反滤过程数值研究,为尾矿库排渗系统反滤设计研究提供参考.%Horizontal drainage pipe and radial well are the typical drainage systems for tailings reservoir.The geotextile is the main filter material for drainage pipe(radial tube),but its filter layer lacks of strict filter design,and its filtration perform-ance is quite different.Through describing the typical filter structure and the effect of each part on the filter performance,the existing filter criteria and the filter test techniques,and the progress on durability of filter layer,research progresses on the tail-ings statistical characteristics,the geotextile parameters,filtering process of geotextile filter layer are summarized,and several research directions in filter design of the tailings dam drainage system are pointed out,including researchs on impacting of physical and mechanical properties of tailing on geotextile filter layer,characterization methodology of geotextile,measurement of geotextile characteristic parameters,long-term filtration test methodology and equipment,and numerical method for filtration process of geotextile filter,which provides references for the filter design of the tailings dam drainage system.