(1. State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam，Chongqing University， Chongqing 400044，China；2. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；3. Structural Health Monitoring and Control Institute，Shijiazhuang Tiedao University，Shijiazhuang，Hebei 050043，China)
Abstract：The microscopic geometrical characteristic of the surface sedimentary tailings is described in this paper. Microscopic experiment and theoretical analysis were used to research the microscopic geometric characteristics of tailings and the effect of distance on microscopic geometric characteristics. Some charts and indicators were used to describe the microscopic geometric characteristics，such as the number or area frequency distribution histogram of grain size，circularity，roundness and textural fractal dimension. Tailings grains according to their microscopic geometrical characteristics were divided into the micron-sized grains and the non-micron grains with the boundary of 35 ?m. The derived formula showed that the distribution of surface sedimentary tailings was affected by the grain size，initial flow velocity，gradient，etc. The stress ratio was 1.4 when tailings reached the critical state.
李夕兵，蒋卫东，贺怀建. 尾矿堆积坝透镜体分布状态研究[J]. 岩土力学，2004，25(6)：947-949.(Ll Xibing，JIANG Weidong，HE Huaijian. Study on distributing state of lenticle in tailings fill dam[J]. Rock and Soil Mechanics，2004，25(6)：947-949.(in Chinese))
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2016, Vol. 35 
