Quantitative study on evolution characteristics of force chain of granular materials in ore drawing from multiple funnels process

被引：2

作者：

Chen Q. ^{[1
]}

Liu E. ^{[1
]}

Qin S. ^{[1
]}

机构：

[1] College of Resources, Environment and Materials, Guangxi University, Nanning

来源：

Chen, Qingfa (chqf98121@163.com) | 1600年 / Central South University of Technology卷 / 52期

基金：

中国国家自然科学基金;

关键词：

Evolution characteristics; Force chain; Granular materials; Ore drawing from multiple funnels; Quantitative study;

D O I：

10.11817/j.issn.1672-7207.2021.11.025

中图分类号：

学科分类号：

摘要：

With the help of the discrete element software, the evolution characteristics of the force chain such as the number, length, strength and direction of the ore granular materials system in the process of ore drawing from multiple funnels were quantitatively studied. The results show that in the process of ore drawing from multiple funnels, the number of force chains decreases exponentially, and the probability distribution law of force chain length at different drawing nodes also decreases exponentially. In the process of ore drawing, the fluctuation range of force chain strength is large, and it decreases exponentially with the increase of drawing times. The probability distribution law of force chain strength under the conditions of different ore drawing nodes is also consistent, which increases firstly in exponential form and then decreases in exponential form. In the early and middle stage of ore drawing, the main direction angle of force chain distribution in the granular materials system stays around 90° and the anisotropy degree characterization parameter βn increases gradually, showing obvious anisotropy. In the later stage of ore drawing, the force chain with 45° to the horizontal direction increases gradually, the main direction angle θn of force chain distribution in the system changes from 84.40° to 30.16°, and the anisotropy degree characterization parameter βndecreases gradually. © 2021, Central South University Press. All right reserved.

引用

页码：4046 / 4054

页数：8

共 23 条

[1]

QIAO Dengpan, LI Wenzeng, ZHANG Dan, Et al., Present situation, problems and directions of studying on ore-drawing theory, China Mining Magazine, 13, 10, pp. 19-24, (2004)

[2]

ZHANG Shenhe, LI Rongfu, LIU Yuxiang, Study on stress field of ore and rock movement in caving, Nonferrous Metals(Mining Section), 58, 6, pp. 25-27, (2006)

[3]

WANG Changjun, Research of the controlling techniques of ore drawing based on the best economic dynamic removal ore grade, pp. 25-32, (2009)

[4]

SUN Qicheng, LIU Xiaoxing, ZHANG Guohua, Et al., The mesoscopic structures of dense granular materials, Advances in Mechanics, 47, 1, pp. 263-308, (2017)

[5]

SUN Qicheng, JIN Feng, WANG Guangqian, The multiscale structure of dense granular matter, Mechanics in Engineering, 32, 1, pp. 10-15, (2010)

[6]

SUN Qicheng, WANG Guangqian, Introduction to granular material mechanics, pp. 21-30, (2009)

[7]

AN Lingshi, Macro- and meso-mechanical properties of frozen soil and meso-deformation mechanism of subgrade, pp. 35-40, (2018)

[8]

OOIE T, LUO Tao, LI Gang, Et al., DEM modelling of macro-and meso-mechanisms for rockfill materials, Engineering Journal of Wuhan University, 51, 7, pp. 607-612, (2018)

[9]

TORDESILLAS A, SHI Jingyu, MUHLHAUS H B., Noncoaxiality and force chain evolution, International Journal of Engineering Science, 47, 11, pp. 1386-1404, (2009)

[10]

HU Chao, Study on multiscale model and macro-mesoscopic mechanical properties of rockfill, pp. 15-21, (2015)

← 1 2 3 →