A discrete particle model considering particle shape and its simulation study of isolated draw

IF 2.4 3区工程技术

Granular Matter Pub Date : 2025-05-16 DOI:10.1007/s10035-025-01533-8

Liancheng Wang, Anlin Shao, Fuming Qu, Xingfan Zhang, Xiaobo Liu

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引用次数: 0

Abstract

The flow characteristics of granular materials under gravity represent the primary scientific challenge involved in caving mining. Conducting in-depth research in this area contributes to improving ore recovery results. This study introduces an innovative discrete particle dynamics model that combines the advantages of soft-sphere and hard-sphere algorithms to significantly improve the simulation of granular flow in caving mining. The proposed soft-hard sphere coupling model achieves remarkable computational efficiency while accurately capturing the influence of particle shape on flow behavior. By developing a specialized collision resolution algorithm and implementing advanced contact detection methods, the model successfully simulates the isolated draw process for particles of various shapes, including circular, polygonal and elliptical particles. The reliability of the model is thoroughly validated through comparison with physical experiments and theoretical models. Furthermore, the study demonstrates how the rolling resistance coefficient can effectively characterize particle shape effects in circular particle simulations, providing a practical approach to balance computational efficiency and accuracy. These developments offer valuable insights for optimizing ore recovery in caving mining operations.

Graphical abstract

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考虑颗粒形状的离散颗粒模型及其孤立拉伸的仿真研究

粒状物料在重力作用下的流动特性是崩落开采的首要科学挑战。深入开展这方面的研究，有助于提高矿石回收效果。本研究引入了一种创新的离散颗粒动力学模型，结合了软球和硬球算法的优点，显著改善了崩落开采中颗粒流动的模拟。提出的软-硬球体耦合模型在准确捕捉颗粒形状对流动特性影响的同时，具有显著的计算效率。通过开发专门的碰撞分辨算法和实现先进的接触检测方法，该模型成功地模拟了圆形、多边形和椭圆形等不同形状粒子的孤立绘制过程。通过与物理实验和理论模型的比较，充分验证了模型的可靠性。此外，研究表明，滚动阻力系数可以有效地表征圆形粒子模拟中的粒子形状效应，为平衡计算效率和精度提供了一种实用的方法。这些发展为优化崩落采矿作业中的矿石回收提供了有价值的见解。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Granular Matter MATERIALS SCIENCE, MULTIDISCIPLINARY-MECHANICS

CiteScore

4.30

自引率

8.30%

发文量

期刊介绍： Although many phenomena observed in granular materials are still not yet fully understood, important contributions have been made to further our understanding using modern tools from statistical mechanics, micro-mechanics, and computational science. These modern tools apply to disordered systems, phase transitions, instabilities or intermittent behavior and the performance of discrete particle simulations. >> Until now, however, many of these results were only to be found scattered throughout the literature. Physicists are often unaware of the theories and results published by engineers or other fields - and vice versa. The journal Granular Matter thus serves as an interdisciplinary platform of communication among researchers of various disciplines who are involved in the basic research on granular media. It helps to establish a common language and gather articles under one single roof that up to now have been spread over many journals in a variety of fields. Notwithstanding, highly applied or technical work is beyond the scope of this journal.