期刊论文

Tao, G.-Q.(nhutgq@126.com)

中文

煤炭学报

0253-9993

2010

35

5

750-754

10.13225/j.cnki.jccs.2010.05.020

湖南省自然科学基金资助项目（07JJ3090）；

本校为第一且通讯机构

介绍了Bergmark-Roos方程的基本假设和基本原理, 讨论了改进的Bergmark-Roos方程, 该方程考虑了放矿口尺寸大小对散体移动规律的影响. 从力学的观点建立了松散矿岩流动的数学模型, 揭示了放矿椭球体的形成机理. 将改进的Bergmark-Roos放矿理论与椭球体放矿理论进行了详细的对比. 根据Bergmark-Roos放矿理论得到的相关系数超过0.9, 说明该理论得到的放出体与实际基本相符. 对比结果表明, 该理论与椭球体放矿理论一样, 具有较高的精度, 可较好地反映崩落矿岩的流动特性

The Bergmark-Roos hypothesis was discussed and the derivation of the Bergmark-Roos equation was reviewed. Then a revised version of the equation was developed which accounts for a non-zero opening width. The flowing mathematical model for broken ore and rock loose was established by the point of mechanics view and the forming mechanism of ellipsoid shape of ore drawing was revealed. Moreover, two ore drawing methods, namely ODMBR and ore drawing method of ellipsoid (ODME), were compared in detail. The coefficient of correlation deduced by ODMBR exceeds 0.9 in three experiments. The experiments...