尾矿颗粒性质与压缩固结特性的关联性研究
发布时间：2018-08-25 11:07
【摘要】：为了研究颗粒组成对黏性尾矿压缩固结特性的影响,对重塑黏性尾矿进行显微观测和侧限压缩试验,讨论了黏性尾矿在细观组成上的特点,分析了细观组成特征和宏观压缩固结特性之间的联系.研究结果表明:相比粉性尾矿和砂性尾矿,黏性尾矿具有黏土矿物多、颗粒表面分维数低、棱角性较弱的特点;重塑黏性尾矿的压缩系数始终大于粉性尾矿和砂性尾矿,而它们的固有压缩曲线相互重叠,且都处在Burland曲线以下;黏性尾矿有微小的次压缩现象,其次固结系数随固结压力的增长而增大,随时间的增加而减小.
[Abstract]:In order to study the influence of particle composition on the compression and consolidation characteristics of viscous tailings, the microscopic observation and side-limited compression test of remolded viscous tailings were carried out. The characteristics of the microscopic composition of viscous tailings were discussed, and the relationship between the microscopic composition and the macroscopic compression and consolidation characteristics was analyzed. Viscous tailings have many clay minerals, low surface fractal dimension of particles and weak angularity; the compression coefficient of remolded viscous tailings is always greater than that of powder tailings and sandy tailings, and their inherent compression curves overlap each other and are all below Burland curve; viscous tailings have small secondary compression phenomenon, followed by consolidation coefficient with consolidation. The junction pressure increases and decreases with time.
【作者单位】： 重庆科技学院安全工程学院;重庆大学煤矿灾害动力学与控制国家重点实验室;中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;中铁大桥科学研究院有限公司;
【基金】：国家自然科学基金资助项目(51234004,51004099,51304088,51404049)
【分类号】：TU41
，
本文编号：2202695
[Abstract]:In order to study the influence of particle composition on the compression and consolidation characteristics of viscous tailings, the microscopic observation and side-limited compression test of remolded viscous tailings were carried out. The characteristics of the microscopic composition of viscous tailings were discussed, and the relationship between the microscopic composition and the macroscopic compression and consolidation characteristics was analyzed. Viscous tailings have many clay minerals, low surface fractal dimension of particles and weak angularity; the compression coefficient of remolded viscous tailings is always greater than that of powder tailings and sandy tailings, and their inherent compression curves overlap each other and are all below Burland curve; viscous tailings have small secondary compression phenomenon, followed by consolidation coefficient with consolidation. The junction pressure increases and decreases with time.
【作者单位】： 重庆科技学院安全工程学院;重庆大学煤矿灾害动力学与控制国家重点实验室;中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;中铁大桥科学研究院有限公司;
【基金】：国家自然科学基金资助项目(51234004,51004099,51304088,51404049)
【分类号】：TU41
，
本文编号：2202695
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