基于随机介质放矿理论的覆盖层结构优化研究

摘要

在分析了随机介质放矿理论的基础上,运用PFC数值模拟软件生成了构成覆盖层的随机介质,并结合杏山铁矿露天转地下开采的实际情况,计算了不同厚度及不同粒径构成覆盖层下矿山开采的主要技术经济指标,同时研究了不同粒径的颗粒在放矿过程中的位移和速度情况,提出了覆盖层的优化结构,对提高矿山的技术经济指标具有重要意义.%Baaed on the analysis of the drawing theory of random media, the random media of the cover was produced by the PFC numerical simulation software. Combined actual situation of open-pit to underground mining in Xingshan iron ore,the main mining technical and economic indicators of the different thickness and composition of particle sizes were calculated. The displacement and velocity of different size particles in the process of mining were researched, and the optimization cover structure was put forward which were of great significance to the improvement of the ore technical and economic indicators.