基于刚体离散元模型的矿岩散体流动规律  

Law of ore and rock flow principle based on rigid-body discrete element model

作　　者：徐国元[1] 赵建平[1] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《辽宁工程技术大学学报（自然科学版）》2009年第1期24-27,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家"十五"科技攻关滚动项目(2001BA609A-09-04)

摘　　要：针对崩落采矿法矿石损失与贫化大的问题,利用刚体离散元原理和方法,成功研究了多种放矿制度下覆盖岩层与矿石的相互作用和界面动态变化过程。研究表明:在1 213 m左出矿口放矿时,其右上方约9 m位置矿石被废石包裹,即使再采用相邻或相间出矿口放矿,被包裹矿石也难以放出,矿石贫化损失最大;采用中出矿口放矿时,矿岩界面增大,呈漏斗状,贫化次之;采用左中右三个出矿口均衡放矿时,矿岩界面最短且近似平行下降,矿石贫化与损失最少。模拟结果对于预测不同放矿制度下,矿石的贫化与损失指标提供了可靠依据。In view of the problem of ore loss and heavy dilution in caving mining method ,the DEM （discrete element method） of rigid body was used to simulate successfully interaction and dynamic changes of ore rock interface under several ore drawing systems. Studies have shown that the ore is wrapped up by the mullock about 9m in right above left drawing point and the ore dilution and loss are serious when left drawing point was used to draw ore. The wrapped ore will be difficult to recover even if middle drawing point or right drawing point is used to draw ore. When middle drawing point draw, the ore rock interface increases and takes the form of a funnel. The ore dilution takes second place. When ore drawing is proportional by three drawing points, ore rock interface is short and dropped paraUelly.The dilution and loss index are the fewest among them. The numerical simulation results can offer the reliable basis for predicting the ore loss and dilution index under several ore drawing systems.

关 键 词：崩落法 离散元法 放矿 非均匀矿岩散体 数值模拟 

分 类 号：TB553[理学—物理]