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  • CN 62-1112/TF 
  • ISSN 1005-2518 
  • 创刊于1988年
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采选技术与矿山管理

露天铀矿山爆区品位估算方法优选研究

  • 谭期仁 ,
  • 董文明 ,
  • 毕林 ,
  • 蔡兴琪 ,
  • 苗小虎
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  • 1. 长沙迪迈数码科技股份有限公司,湖南 长沙 410083
    2. 中广核铀业发展有限公司,北京 100083
    3. 中南大学资源与安全工程学院,湖南 长沙 410083
谭期仁(1990-),男,湖南邵阳人,硕士研究生,从事数字矿山建模及规划方面的研究工作。kmhtqr@sina.cn

收稿日期: 2019-06-29

  修回日期: 2019-07-20

  网络出版日期: 2019-08-19

基金资助

距离场的复杂金属矿体三维建模技术研究”(41572317)

Study on Optimization of Grade Estimation Method of Muckpile in Open-pit Uranium Mine

  • Qiren TAN ,
  • Wenming DONG ,
  • Lin BI ,
  • Xingqi CAI ,
  • Xiaohu MIAO
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  • 1. Changsha Digital Mine Co. ,Ltd. ,Changsha 410083,Hunan,China
    2. CGNPC Uranium Resources Co. ,Ltd. ,Beijing 100083,China
    3. School of Resources and Safety Engineering,Central South University,Changsha 410083,Hunan,China

Received date: 2019-06-29

  Revised date: 2019-07-20

  Online published: 2019-08-19

摘要

爆区品位估算是露天铀矿山极其重要的日常性工作。为快速、准确地得到品位估算结果,从估算方法选取展开研究,介绍了最近距离法、距离幂次反比法和普通克里格法等品位估算方法的基本原理。以国外某铀矿为例,采用上述估算方法和三维矿业软件开展了爆区品位估算试验,并以普通克里格法的估算结果为标准,对最近距离法和距离幂次反比法的估算结果进行了偏差、统计和图形分析。结果表明:在矿石量和平均品位方面,与普通克里格法所得的估算结果相比,距离幂次反比法的偏差较小,而最近距离法的偏差较大;在估值准确性方面,距离幂次反比法基本接近普通克里格法,且估值精度满足矿山实际生产的要求,可用于爆区估值,而最近距离法的估值精度相对较差,不能用于爆区估值。距离幂次反比法作为爆区品位估算方法,操作过程简单且参数相对确定,在满足估值精度要求的同时可节约建模时间。该研究成果可为类似露天铀矿山进行爆区品位估算提供一定的指导。

本文引用格式

谭期仁 , 董文明 , 毕林 , 蔡兴琪 , 苗小虎 . 露天铀矿山爆区品位估算方法优选研究[J]. 黄金科学技术, 2019 , 27(4) : 573 -580 . DOI: 10.11872/j.issn.1005-2518.2019.04.573

Abstract

In recent years,due to the impact of Fukushima nuclear leakage accident,the price of natural uranium has continued to decline,and more and more uranium mines have gradually attached importance to the utilization of resources.Muckpile is the smallest mining unit in open-pit mine.Finding out the grade distribution in muckpile is very important for blasting charge,network connection design,ore block design and shoveling operation.At the same time,it is very important to reduce dilution and loss and improve resource utilization. Grade estimation of muckpile is an extremely important routine work in open-pit uranium mines.In order to get the grade estimation results quickly and accurately,the basic principles of the nearest neighbor method,the inverse distance weighted method and the ordinary Kriging method are introduced.Taking a foreign uranium mine as an example,the bench height of the open-pit uranium mine is 7.5 m.The bench is divided into several muckpiles by single bench mining.The blasting hole grid is about 6 m×6 m.Gamma logging is used to obtain the grade information of each blasting hole in the ore-bearing muckpile.The logging interval is 0.1 m,that is,the original sample length is 0.1 m,and Gamma logging is not carried out in the pure waste muckpile.Using three-dimensional mining software,four muckspiles were selected to carry out grade estimation experiments.Based on the estimation results of the ordinary Kriging method,the deviation,statistics and graphical analysis of the estimation results of the nearest neighbor method and the inverse distance weighted method were carried out successively.The results show that the deviation of the inverse distance weighted method is generally smaller than that of the ordinary Kriging method in ore quantity and average grade,the maximum deviation of ore quantity is only 6.19%,while that of the nearest neighbor method is generally larger,and the maximum deviation of ore quantity is 27.6%.The accuracy of the nearest neighbor method is close to that of the ordinary Kriging method,and the accuracy of estimation meets the requirements of actual production of mines.It can be used to estimate the grade of muckpile.However,the nearest neighbor method has a relatively poor estimation accuracy and can not be used to estimate the grade of muckpile.The inverse distance weighted method,as a grade estimation method of muckpile,has a simple operation process and relatively definite parameters,which can save a lot of time while satisfying the requirement of estimation accuracy.The research results can provide guidance and reference for similar open-pit uranium mines to estimate the grade of muckpile.

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