尾矿砂的堆存特征及其抗剪强度特性
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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
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.
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.
引文
余太金.江西德兴铜矿二号尾矿率现状工程地质特征.中国勘察与岩土工程,1998(2):38～42
1 徐宏达.我国尾矿库病害事故统计分析.工业建筑,2001,31(1):69～71
2 柳厚祥,王开治.旋流器与分散管联合堆筑尾矿坝地震反应分析.岩土工程学报,1999,21(2):171～176
3 保华富,张光科,龚 涛.尾矿料的物理力学性质试验研究.四川联合大学学报(工程科学版),1999,3(5):115～120
4 王凤江.上游法高尾矿坝的抗震问题.冶金矿山设计与建设,2001,33(5):10～13
5 保华富.土工格栅加筋碎石土试验研究.岩土工程学报,1999,21(2):217～221
6 吴景海,王德群,陈 环.土工合成材料加筋砂土三轴试验研究.岩土工程学报,2000,22(2):199～204
1 徐宏达.我国尾矿库病害事故统计分析.工业建筑,2001,31(1):69～71
2 柳厚祥,王开治.旋流器与分散管联合堆筑尾矿坝地震反应分析.岩土工程学报,1999,21(2):171～176
3 保华富,张光科,龚 涛.尾矿料的物理力学性质试验研究.四川联合大学学报(工程科学版),1999,3(5):115～120
4 王凤江.上游法高尾矿坝的抗震问题.冶金矿山设计与建设,2001,33(5):10～13
5 保华富.土工格栅加筋碎石土试验研究.岩土工程学报,1999,21(2):217～221
6 吴景海,王德群,陈 环.土工合成材料加筋砂土三轴试验研究.岩土工程学报,2000,22(2):199～204
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