XIA Rui1 ， YANG Zhaojian1 ， LI Bo1, 2 ， WANG Xuewen1 ， WEI Xing1 ， LI Tiejun1
（1. Shanxi Key Laboratory of Fully Mechanized Coal Mining Equipment ； College of Mechanical Engineering， Taiyuan University of Technology， Taiyuan 030024，China； 2. Post-doctoral Scientific Research Station， Shanxi Coal Mining Machinery Manufacturing Co. ， Ltd. ， Taiyuan 030031， China）
Abstract：The repose angle test of coal bulk could be used for optimization of the discrete element method (DEM) parameters, laying the foundation for accurate simulation analysis. Three coal particle sizes were chosen to study the influence by particle size on the repose angle using the repose angle test and image processing technology. The research established different models of bulk coal to analyze the influence of the DEM model accuracy on simulation results. Based on this, the effect of falling height on the repose angle was studied. Results show that the repose angle increases as the particle size increases. And better simulation results can be achieved by using the particle model similar to the real bulk coal.Besides, the repose angle decreases linearly as the falling height increases.
Keywords：discrete element method; repose angle; bulk coal; falling height; image processing
中图分类号：TP391.9；O347.7 文献标志码：A
文章编号：1008-5548（2018）06-0036-07
DOI：10.13732/j.issn.1008-5548.2018.06.007
收稿日期：2018-06-21， 修回日期：2018-10-22，在线出版时间：2018-12-17。
基金项目：国家自然科学基金资助项目，编号：51875386，51804207；山西省回国留学人员科研资助项目，编号：2016-043；山西省基础条件平台项目，编号：2014091016。
第一作者简介：夏蕊（1988—），女，博士研究生，研究方向为离散元法、机械优化设计。E-mail ：648509152@qq.com。
通信作者简介：杨兆建（1955—），男，博士，教授，博士生导师，研究方向为计算散体力学、机械设计理论。E-mail ：tyutyangzhaojian@163.com。
