Study on the shapes of tailings particles based on microscopy and image processing technologies
YANG Yonghao1，2，WEI Zuoan1，2，CHEN Yulong3，REN Bingxu1，2
(1. State Key Laboratory of Coal Mine Disaster Dynamics and Control，Chongqing University，Chongqing 400030，China；2. State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam，Chongqing University，Chongqing 400030，China；3. Department of Civil Engineering，University of Tokyo，Tokyo 113–8656，Japan)
The physical and mechanical properties of the dielectric materials mainly depend on shapes of particles in granular media. Therefore，in order to reveal the differences of physical and mechanical properties between tailings and natural sands，one of best ways is to use microscopy and image processing technologies to quantify four indicators (flatness，roundness，convexity and roughness) which can well quantify the shapes of particles. In this research，four tailings (gold，tin，copper and iron) and two natural sands (river sand and sea sand) are selected for such comparison. Results show that：(1) the flatness of tailings and sea sands decrease with the increase of particle size，which means tailings or sea sands with needle shapes tend to be spherical. (2) The roundness of tailings and river sands decrease with the increase of particle size，which also indicates the shapes of tailings and rover sands tend to spherical shapes. However，the roundness of sea sands decrease with the increase of particle size. (3) The convexity of tailings and sea sands increase with the increase of particle size，which indicates that angularity of tailings and sea sands surface reduce with the increase of particle size. (4) The roughness of tailings，river and sea sands increase with the increase of particle size.
杨永浩1，2，魏作安1，2，陈宇龙3，任炳旭1，2. 基于图像处理技术的尾矿颗粒形态研究[J]. 岩石力学与工程学报, 2017, 36(S1): 3689-3695.
YANG Yonghao1，2，WEI Zuoan1，2，CHEN Yulong3，REN Bingxu1，2. Study on the shapes of tailings particles based on microscopy and image processing technologies. , 2017, 36(S1): 3689-3695.
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2017, Vol. 36 
