细粒赤泥的工程特性

IF 2.7 3区 工程技术 Q3 ENVIRONMENTAL SCIENCES
Hua Tian, David J. Williams, K. Mandisodza, Chenming Zhang, Sebastian Quintero Olaya, Wenqiang Zhang, Chongyi Tang
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引用次数: 0

摘要

通过室内试验对细粒赤泥尾矿的基本工程参数进行了评价;通过对应力-变形特征的评价,研究了矿物学与微观结构的耦合效应;利用临界状态土力学和经验方程分别对其静力液化敏感性和地震液化敏感性进行了评估。结果表明,胶结矿物存在,粘土矿物无膨胀。其结构和压缩特性与粘土相似,强度参数与砂土相似。应力-变形曲线表现为整体应变软化,初期出现暂时的应变硬化,这可以定性地解释为微观结构和矿物组分的耦合作用。羟基钠石在颗粒之间的接触点处沉淀,提供微观结构胶结键,使聚集体在初始加载阶段抵抗外部载荷。赤泥具有较强的静态液化能力,但具有潜在的地震液化能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Engineering properties of fine-grained red mud
ABSTRACT Basic engineering parameters of fine-grained red mud tailings were evaluated via laboratory tests; the coupled effect of mineralogy and microstructure was investigated by appraising the stress-deformation characteristics; and the static and seismic liquefaction susceptibilities were evaluated via critical state soil mechanics and empirical equations, respectively. Results indicated the presence of cementitious minerals without swollen clay minerals. The textural and compression properties were similar to those of clays, whereas the strength parameters were similar to those of sand. The stress-deformation curves show overall strain softening with a temporary strain-hardening curve at the beginning, which can be qualitatively explained by the coupled effect of the microstructure and mineral components. Hydroxysodalite precipitated at the contact points among the particles afforded microstructural cementation bonds, allowing the aggregates to resist external loads at the initial loading stage. Red mud presented strong resistance to static liquefaction but was potentially seismically liquefiable.
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来源期刊
International Journal of Mining Reclamation and Environment
International Journal of Mining Reclamation and Environment ENVIRONMENTAL SCIENCES-MINING & MINERAL PROCESSING
CiteScore
5.70
自引率
8.30%
发文量
30
审稿时长
>12 weeks
期刊介绍: The International Journal of Mining, Reclamation and Environment published research on mining and environmental technology engineering relating to metalliferous deposits, coal, oil sands, and industrial minerals. We welcome environmental mining research papers that explore: -Mining environmental impact assessment and permitting- Mining and processing technologies- Mining waste management and waste minimization practices in mining- Mine site closure- Mining decommissioning and reclamation- Acid mine drainage. The International Journal of Mining, Reclamation and Environment welcomes mining research papers that explore: -Design of surface and underground mines (economics, geotechnical, production scheduling, ventilation)- Mine planning and optimization- Mining geostatics- Mine drilling and blasting technologies- Mining material handling systems- Mine equipment
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