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| Microscopic geometric characteristics of surface sedimentary tailings |
| WU Shangwei1，YANG Chunhe1，2，ZHANG Chao2，MAO Haijun2，LI Haoran3 |
| (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) |
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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.
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| [1] 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))
[2] JOPONY M，USUP G，MOHAMED M. Particle size Distribution of copper mine tailings from Lohan Ranau Sabah and its relationship with heavy metal content[J]. Pertanika，1987，10(1)：37–40.
[3] GIULIANO V，PAGNANELLI F，BORNORONI L，et al. Toxic elements at a disused mine district：particle size distribution and total concentration in stream sediments and mine tailings[J]. Journal of Hazardous Materials，2007，148(1)：409–418.
[4] 张季如，朱瑞赓，祝文化. 用粒径的数量分布表征的土壤分形特征[J]. 水利学报，2004，4(4)：67–71.(ZHANG Jiru，ZHU Rugeng，ZHU Wenhua. Fractal features of soils characterized by grain size distribution[J]. Journal of Hydraulic Engineering，2004，4(4)：67–71.(in Chinese))
[5] 刘晓明，赵明华，苏永华. 沉积岩土粒度分布分形模型改进及应用[J]. 岩石力学与工程学报，2006，25(8)：1 691–1 697.(LIU Xiaoming，ZHAO Minghua，SU Yonghua. Improvement and application of fractal model to size distribution of sedimentary rock and soil[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(8)：1 691– 1 697.(in Chinese))
[6] BOWMAN E T，SOGA K，DRUMMOND W. Particle shape characterisation using Fourier descriptor analysis[J]. Geotechnique，2001，51(6)：545–554.
[7] SANTAMARINA J C，CHO G C. Soil behaviour：The role of particle shape[C]// Advances in Geotechnical Engineering：The Skempton Conference. Thomas Telford：[s. n.]，2004：604–617.
[8] 刘清秉，项 伟，LEHANE B M，等. 颗粒形状对砂土抗剪强度及桩端阻力影响机制试验研究[J]. 岩石力学与工程学报，2011，30(2)：400–409.(LIU Qingbing，XIANG Wei，LEHANE B M，et al. experimental study of effect of particle shapes on shear strength of sand and tip resistance of driven pile[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(2)：400–409.(in Chinese))
[9] 李丽华，陈 轮，高盛焱，等. 三江平原沼泽土微观特性试验研究[J]. 岩土力学，2009，30(8)：2 295–2 299.(LI Lihua，CHEN Lun，GAO Shengyan，et al. Study of microstructure properties of swamp soil in sanjiang plain[J]. Rock and Soil Mechanics，2009，30(8)：2 295– 2 299.(in Chinese))
[10] 涂新斌，王思敬. 图像分析的颗粒形状参数描述[J]. 岩土工程学报，2004，26(5)：659–662.(TU Xinbin，WANG Sijing. Particle shape descriptor in digital image analysis[J]. Chinese Journal of Geotechnical Engineering，2004，26(5)：659–662.(in Chinese))
[11] BARNARD P L，RUBIN D M，HARNEY J，et al. Field test comparison of an autocorrelation technique for determining grain size using a digital“beachball”camera versus traditional methods[J]. Sedimentary Geology，2007，201(1)：180–195.
[12] IGATHINATHANE C，ULUSOY U，PORDESIMO L O. Comparison of particle size distribution of celestite mineral by machine vision ΣVolume approach and mechanical sieving[J]. Powder Technology，2012，215：137–146.
[13] ULUSOY U，YEKELER M，HIÇYILMAZ C. Determination of the shape，morphological and wettability properties of quartz and their correlations[J]. Minerals Engineering，2003，16(10)：951–964.
[14] 周 健，余荣传，贾敏才. 基于数字图像技术的砂土模型试验细观结构参数测量[J]. 岩土工程学报，2006，28(12)：2 047–2 052. (ZHOU Jian，YU Rongchuan，JIA Mincai. Measurement of microstructure parameters for granular soil model using digital image technology[J]. Chinese Journal of Geotechnical Engineering，2006，28(12)：2 047– 2 052.(in Chinese))
[15] WADELL H. Volume，shape，and roundness of rock particles[J]. Journal of Geology，1932，40(5)：443–451.
[16] WADELL H. Sphericity and roundness of rock particles[J]. The Journal of Geology，1933，41(3)：310–331.
[17] KRUMBEIN W C，SLOSS L L. Stratigraphy and sedimentation[M]. San Francisco：Freeman，1963：660. |
| [1] |
LI Botao1, 2, 3, TAN Yuxuan1, LIN Haifei4, 5*, WEI Jianping1, 2, 3, ZHANG Hongtu1, 2, 3, LI Shugang4, 5, WEI Zongyong4, 5, WANG Pei4, LUO Rongwei4, LIU Yanwei1, 2, 3. Mechanical properties and mesoscopic damage evolution of coal under liquid-nitrogen freezing at different initial temperatures[J]. , 2026, 45(6): 1757-1772. |
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2016, Vol. 35 
