尾矿砂的堆存特征及其抗剪强度特性
摘要:以国内多座尾矿库的勘察试验资料为基础,从坝体尾矿砂堆存的物理特征出发,对尾矿砂沿尾矿库纵、横方向的颗粒变化规律,尾矿砂的粒径、含水量、孔隙比以及相对密度与尾矿砂的内摩擦角的关系进行探讨。结果表明:孔隙比和相对密度对尾矿砂内摩擦角影响较大,且表现为线性相关;尾矿砂的内摩擦角和堆存深度的相关性不强;增大尾矿砂的相对密度或减小其孔隙比对提高坝体抗剪强度非常有利;在尾矿砂中铺设土工织物可显著地提高其粘聚力数值。
Abstract:Based on the data from geological exploration and experiment of some tailings reservoir at home,this paper discusses the granule variational rule of tailings sand on plane and vertical plane,considering that the correlation to the angle of internal friction unde different granularity,water content,void ratio and relative density.The results show that the void ratio and relative density has great influence on the angle of intenal friction,which is irrelative to the deposit depth.In order to improve the stability of tailings dam,the perfect method is suggested to increase the relative density or decrease the void ratio of tailings saind which can be reinforced by geotextile and bear higher cohesion.
中文标题:
尾矿砂的堆存特征及其抗剪强度特性
Deposit Characteristic and Shear Strength of Tailing Sand
作者:
王凤江1,张作维2
WANG Feng-jiang1,ZHANG Zuo-wei2
作者简介:王凤江,1968年生,男,汉族,河北昌黎人,博士,高级工程师。
通讯地址:
1. 秦皇岛冶金设计研究总院勘察基础公司, 秦皇岛 066001; 2. 燕山大学基建处, 秦皇岛 066004
中图分类号:TU44
出版物:岩土工程技术
收稿日期:2003-03-18
网络出版日期:2021-07-21
关键词:尾矿砂,堆存特征,内摩擦角
Key words:tailings sand,deposit characteristic,angle of internal friction
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