摘要
无底柱分段崩落法应用于缓倾斜中厚矿体时,常导致大量的矿石残留于下盘,分析下盘残留矿石的各影响因素,对于合理布置采矿工程,提高矿石的回收率具有重要的指导意义。本文在综合考虑散体的流动性、矿体条件、采场结构参数的基础上,基于离散元研究了散体自然安息角、矿体倾角、矿体厚度、分段高度、出矿口尺寸对下盘残留矿石的影响。研究结果表明,影响下盘残留矿石的各因素由主到次的顺序为矿体倾角、自然安息角、矿体厚度、分段高度和出矿口尺寸,其中自然安息角、矿体厚度、分段高度与下盘残留矿石呈正相关,矿体倾角与下盘残留矿石呈负相关,并且当自然安息角大于矿体倾角时,下盘残留矿石随着自然安息角与矿体倾角之间差异程度的增加而显著增大。
When the sublevel caving method is applied to gently inclined and medium thick orebody,it often results in a lot of footwall residual ores.The analysis of the influence factors of footwall residual ore has a great guiding significance for the reasonable arrangement of mining engineering and improvement of ore recovery.On the basis of considering the flowability of granular material,the condition of the orebody and the structural parameters of the stope,researching the effects of natural repose angle,orebody dip angle,orebody thickness,sublevel height and drawpoint size on footwall residual ores by discrete element.The results show that the factors influencing the footwall residual ores are the orebody dip angle,natural repose angle,orebody thickness,sublevel height and drawpoint size that order by influence degree.The natural repose angle,orebody thickness,and sublevel height are positively correlated with the footwall residual ores,and the orebody dip angle is negatively correlated with the footwall residual ores.And when the natural repose angle is greater than the orebody dip angle,the footwall residual ores increase significantly with the increase of the difference between the natural repose angle and the orebody dip angle.
作者
杜保平
刘欢
卜庆为
康宏垚
李鹏
DU Baoping;LIU Huan;BU Qingwei;KANG Hongyao;LI Peng(Inner Mongolia University of Science and Technology Inner Mongolia Key Laboratory of Mining Engineering,Baotou 014010,China;School of Resources and Environmental Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Inner Mongolia University of Science and Technology Blasting Engineering Co.,Ltd.,Hohhot 010010,China;School of Mining and Mechanical Engineering,Liupanshui Normal University,Liupanshui 553004,China)
出处
《中国矿业》
北大核心
2025年第S1期413-417,共5页
China Mining Magazine
基金
内蒙古自治区自然科学基金项目资助(编号:2022QN05012)
煤炭绿色智能开采贵州省科技创新领军人才工作站项目资助(编号:黔科合平台KXJZ[2024]036)
贵州省煤炭资源开发与清洁利用工程研究中心项目资助(编号:黔发改高技[2025]90号)
内蒙古自治区教育厅一流学科科研专项项目资助(编号:YLXKZX-NKD-052)。
关键词
无底柱分段崩落法
缓倾斜中厚矿体
下盘残留
离散元
散体
sublevel caving method
gently inclined and medium thick orebody
footwall residual ore
discrete element
granular material
