尾矿砂的静动力特性试验研究

发布时间：2018-03-05 05:26

本文选题：尾矿砂　切入点：液化　出处：《防灾科技学院》2016年硕士论文　论文类型：学位论文

【摘要】：随着国民经济的快速发展,矿产资源的需求量和开采量逐渐提高,致使我国尾矿库的数量和库容量也逐渐增加,因此中线法筑坝工艺在我国大型尾矿库工程中逐步广泛使用。虽然理论上该筑坝工艺具有浸润线低,静动力稳定性好的特点,但是目前该工艺下的工程实例和实践经验极其缺乏,尾矿砂物理力学特性的研究深度还不够,而且由于中线法筑坝工艺的复杂性和特殊性,尾矿材料的多样性,以及震害后果的严重性,所以显得对中线法尾矿砂的动力特性研究尤为重要。本文以云南某铜矿拟建中线法尾矿库为研究背景,对旋流器分级产生的底流尾矿砂和溢流尾矿砂进行了大量的室内试验分析,对两种尾矿砂的动力特性做了较为全面的、系统的试验研究,主要工作和取得的成果如下:(1)在物理力学性质指标试验中,分析了两种尾矿砂的静力学性质,得出了基本物理性质指标参数和渗透性、压缩性、抗剪强度等静力学指标参数。(2)通过GCTS动三轴仪和GCTS共振柱对两种尾矿砂开展了一系列的动力特性测试,研究了这两种尾矿砂的抗液化强度、动孔压特性、动模量和阻尼比的衰减特性,以及筑坝材料底流尾矿砂的残余变形特性。(3)在相关模型参数试验中,获得了两种尾矿砂的邓肯-张E-μ模型和E-B模型参数、孔压模型及参数、Hardin-Drnevich模型参数、沈珠江模型动模量阻尼比参数,以及底流尾矿砂的沈珠江残余变形模型参数。
[Abstract]:With the rapid development of the national economy, the demand for mineral resources and the amount of mining are gradually increased, resulting in the increase of the number and capacity of tailings reservoirs in China. Therefore, the mid-line damming process has been widely used in large tailings reservoir projects in China, although theoretically it has the characteristics of low infiltrating line and good static and dynamic stability. However, at present, the engineering examples and practical experience under this process are extremely lacking, and the research depth of the physical and mechanical properties of tailings is not enough, and because of the complexity and particularity of the mid-line dam construction process, the variety of tailings materials is obtained. As well as the severity of the earthquake damage, it is particularly important to study the dynamic characteristics of the mid-line tailings. This paper takes a copper mine in Yunnan Province as the background of the study. A large number of laboratory tests were carried out on the bottom flow tailings and overflow tailings produced by cyclone classification. The dynamic characteristics of the two types of tailings were studied comprehensively and systematically. The main work and results obtained are as follows: (1) in the test of physical and mechanical properties, the static properties of two kinds of tailings are analyzed, and the basic physical property parameters, permeability and compressibility are obtained. A series of dynamic tests were carried out on two kinds of tailings by GCTS dynamic triaxial instrument and GCTS resonance column, and the liquefaction strength and dynamic pore pressure characteristics of the two kinds of tailings were studied. The attenuation characteristics of dynamic modulus and damping ratio, as well as the residual deformation characteristics of tailings with bottom flow of damming materials. In the relevant model parameter tests, the Duncan-Chang E- 渭 model and E-B model parameters of two kinds of tailings are obtained. The pore pressure model and its parameters include Hardin-Drnevich model parameters, Shen Zhujiang model parameters of dynamic modulus damping ratio, and Shen Zhujiang residual deformation model parameters of bottom-flow tailings.
【学位授予单位】：防灾科技学院
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TD926.4

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