老挝波罗芬高原铝土矿床资源评价的地质统计学模型

Geostatisticical resource evaluation model of Boloven bauxite deposit,Laos

文章目的是研究一种适合于表生层状铝土矿床的自动化建模和资源估算方法,实现大型矿床尺度上的自动化建模和资源估算。在对老挝波罗芬高原铝土矿钻孔数据进行地质统计学分析的基础上,计算和拟合矿区的变异函数模型;在变异函数变程范围内对见矿工程的顶、底板进行数字网络化处理,建立矿区的三维模型;在三维模型范围内部建立矿块模型;对矿块进行资源类别的自动划分和估值,完成矿区资源量的分类和估算。该模型方法自动化程度高,特别适合于波罗芬高原铝土矿这类地表风化壳矿床的建模和资源量的分类估算。

The automation deposit modeling and resource estimation method for the supergene layered bauxite deposit in Laos was discussed for the purpose of realizing automation modeling and resource estimation in the deposit scale. On the basis of geostatistieal analuysis on drillhole data in the Boloven bauxite deposit, the variograms of the deposit were calculated and fitted; then 3D grid model by gridding the bed top and bottom of all intercepted engineering holes within the range of variogram was constructed ; then ore bloek model within the 3D model was established. Finally the resource classification and resources estimation of the deposit were eompleted by automatieal estimation and resource type classification for each ore block. This model method is particularly suitable for orebody model- ing and resource classification of the supergene deposits such as the Bolovens bauxite deposit.