基于PFC^(2D)的采场覆盖层厚度研究  

Study of Stope Overburden Thickness Based on PFC^(2D)

作　　者：孙明伟[1] 盛建龙[1] 程爱平[1] 

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081

出　　处：《矿业研究与开发》2011年第6期11-13,70,共4页Mining Research and Development

摘　　要：无底柱分段崩落法的回采工作必须在覆盖岩石下放矿,崩落矿石和覆盖层废石直接接触,矿石在覆盖层废石的包围下从放矿口放出,矿石的贫化率及损失率较大且较难控制,因此,研究合理的覆盖层厚度对矿山生产具有重要意义。某铁矿采用无底柱分段崩落法,应用椭球体放矿理论和PFC2D数值模拟两种手段对其覆盖层厚度进行分析研究,从而确定出适合于该矿采场的合理覆盖层厚度。The recovery work of sublevel caving method must be delegated under cavedrock,caved ore in direct contact with overburden waste rock,and ore emit from the draw hole bounding by overburden waste rock.The dilution rate and loss rate are bigger and more difficult to control,so it is important for mine production to research the reasonable overburden thickness.This paper studies overburden thickness with drawing theory and PFC2D numerical simulation to determine the reasonable overburden thickness for an iron using sublevel caving mining method.

关 键 词：无底柱分段崩落法 覆盖层厚度 椭球体放矿理论 PFC数值模拟 

分 类 号：TD853.362[矿业工程—金属矿开采]