矿块模型的块体尺寸参数设定方法研究  

Study on block size parameter setting method of ore block model

作　　者：陈扬 李斌 CHEN Yang;LI Bin(School of Earth Sciences,Donghua University of technology,Nanchang 330013,China)

机构地区：[1]东华理工大学地球科学学院,江西南昌330013

出　　处：《世界有色金属》2022年第19期214-216,共3页World Nonferrous Metals

基　　金：丹霞地貌呈色成因分析创新项目基金(DHYC-202004)。

摘　　要：合理的矿块尺寸是构建能够准确表达矿体的真实形态以及提高矿块模型估值精度的前提。本文以某钨多金属矿床的钨矿体为例,在保证其它估值参数一致的前提下,应用距离幂次反比法对不同水平块体尺寸参数和不同垂向尺寸参数的空白矿块模型进行估值,对估算后得到的矿石总体积以及相应的品位估值结果的标准差和变异系数进行对比分析,探讨矿块尺寸的较优取值。研究结果表明:(1)较优的水平矿块尺寸参数的取值范围在钻孔间距的1/4到1/2之间,垂向尺寸参数的取值范围取决于矿体的厚度;(2)在综合考虑计算精度和计算效率的情况下,实验中所采用的钨矿体,其较优矿块尺寸取值为30m×18m×3m。因此,本文中所采用的对比分析方法对实际三维地质建模的资源储量估算工作具有一定的参考价值。Reasonable ore block size is the premise to construct a ore block model that can accurately express the real shape of the ore body and improve the estimation accuracy of the ore block model. Taking the tungsten ore body of a tungsten polymetallic deposit as an example, on the premise of ensuring the consistency of other estimation parameters, this paper uses the inverse ratio method of distance power to estimate the blank ore block models with different horizontal block size parameters and different vertical size parameters, compares and analyzes the estimated overall ore volume and the standard deviation and variation coefficient of the corresponding grade estimation results, and discusses the better value of ore block size. The results show that:(1) the optimal value range of horizontal ore block size parameters is between 1/4 and 1/2 of borehole spacing, and the value range of vertical size parameters depends on the thickness of ore body;(2) Considering the calculation accuracy and efficiency, the preferred ore block size of tungsten ore body used in the experiment is 30m×18m ×3m. Therefore, the comparative analysis method used in this paper has a certain reference value for the resource reserve estimation of actual three-dimensional geological modeling.

关 键 词：钨矿体 矿块尺寸 矿石体积 标准差 变异系数 

分 类 号：TD985[矿业工程—选矿]