隔离层下单漏斗放矿力链演变的参数敏感性分析
Parameter sensitivity analysis of force chain evolution in single funnel drawing process under isolation layer
陈庆发 1刘军 2龙恩林3
作者信息
- 1. 广西大学 资源环境与材料学院,南宁 530004;广西大学 土木建筑工程学院,南宁 530004
- 2. 广西大学 资源环境与材料学院,南宁 530004
- 3. 广西大学 土木建筑工程学院,南宁 530004
- 折叠
摘要
利用PFC软件,以同步充填留矿法为背景,选取隔离层厚度A、隔离层界面摩擦因数B、矿石颗粒摩擦因数C及颗粒半径D作为正交试验的四种影响因素,对力链特征参数的一般变化规律进行分析,研究影响力链演变的参数及其敏感性.结果表明:力链数量先减少后增加;力链长度的概率分布曲面呈指数形式递减,短力链所占比例逐渐减少,长力链所占比例逐渐增加;力链强度表现出先减少后增加的规律;力链强度的概率分布先呈指数式上升,后呈指数式递减;四种因素对正交试验指标影响的主次顺序为CDAB;对应的最优方案为颗粒摩擦因数0.8、颗粒半径0.008 m、隔离层厚度0.004 m、隔离层界面摩擦因数0.5,此时散体介质体系在放矿过程中最为稳定.
Abstract
In this paper,based on synchronous filling shrinkage method,isolation layer thickness A,isolation layer interface friction factor B,ore particle friction factor C and particle radius D were selected as the four influencing factors of orthogonal test,and PFC software was used to analyze the general change rule of force chain characteristic parameters,so as to study the parameters and sensitivity of influence chain evolution.The results show that the number of force chains decreases first and then increases.The probability distribution surface of force chain length decreases exponentially,the proportion of short force chain decreases gradually,while the proportion of long force chain increases gradually.The strength of the force chain decreases first and then increases,and the distribution probability of force chain strength first increases exponentially and then decreases exponentially.The order of influence of four factors on orthogonal test indexes is CDAB,and the corresponding optimal scheme is the particle friction coefficient of 0.8,particle radius of 0.008 m,isolation layer thickness of 0.004 m,isolation layer interface friction coefficient of 0.5.In this case,the granular media system is the most stable in the ore drawing process.
关键词
散体介质流/力链表征/正交试验/参数敏感性/矩阵分析Key words
granular media flow/force chain characterization/orthogonal test/parameter sensitivity/matrix analysis引用本文复制引用
基金项目
国家自然科学基金资助项目(51964003)
出版年
2024
NETL
NSTL
万方数据