CAI Gaipin， GUO Jin， LI Chen， ZONG Lu

(School of Mechanical and Electrical Engineering，Jiangxi University of Science and Technology，Ganzhou 341000，China)

Abstract: 3D scanning was carried out on rock samples of three shapes to obtain cloud point data of rock shape and the geometric models of shaped rock were constructed. Combining with the lithofacies observed by high power mirror, the bonding model and contact model of rock particles were defined and the mechanical models of multi-stage particle with deferent shape were established. Based on EDEM software, the numerical simulation test was carried out on the vibration slow shear crushing machine and the rock yield after rock crushing was calculated. Compared with the results of crushing experiments, the results show that the trends of relationship curve between rock yield and external cone speed are basically consistent when the sizes of particles obtained by numerical simulation test and crushing test of rock are less than 4, less than 8 and greater than or equal to 8 mm. Rock yield is the highest and crushing effect is the best when the outer cone speed is 45 r/min and the inner cone frequency is 40 Hz. The correlation coefficients between numerical simulation test and crushing experiment are 0.95, 0.97 and 0.97 respectively. Therefore, Multi-stage particle model with deferent shape established can well simulate the mechanism of rock crushing.

Keywords: multi-stage particle model with deferent shape; numerical simulation test; crushing experiment; particle size

中图分类号：TD912

文献标志码：A

收稿日期： 2018-11-05，修回日期:2019-03-21，在线出版时间：2019-04-12 09:44。

基金项目：国家自然科学基金项目，编号：51464017；江西省高校落地计划项目，编号：KJLD13045。

第一作者简介：蔡改贫(1965—)，男，博士，教授，博士生导师，研究方向为物料高效破碎技术。E-mail：1501055578@qq.com。

文章编号：1008-5548(2019)03-0065-07

DOI:10.13732/j.issn.1008-5548.2019.03.011