【摘要】 国内外的地质勘查规范中,对矿产资源量的分类(地质可靠程度)均有标准的定义,但没有确定资源量分类工程间距的定量方法,导致矿产勘查工作经常出现质量隐患。本文用变异函数模型统计学方法探讨这一问题。变异函数的变程反映了空间上区域化变量之间相关性的大小,当矿体样品品位服从正态分布时,正态分布函数位置参数μ等于样品平均品位,形状参数σ等于样品品位标准差,样品品位的方差等于变异函数的基台值;在拐点之间即区间(μ-σ,μ+σ],样品分布概率为0.6826,变异函数变程的0.6826倍(0.6826a)可作为划分控制资源量的分类工程间距;影响资源量分类可靠程度的主要因素是建立的理论变异函数模型的稳健性。更多还原

【Abstract】 The relevant geological specifications at home and abroad generally contain a definition of classification of mineral reserves,but no a quantitative method of determining grid spacing in surveys for classification,frequently leading to potential quality problems in exploration work. This paper addresses this issue using the model of the variogram and statistics. A range of semi variogram represents varying degrees of interdependency of regional variables. When sample grades show a normal distribution,average grade equals the position parameter μ of normal distribution,grade standard deviation equals shape parameter σ,and grade variance equals the base value of semi variogram. Sample distribution probability is 0. 6826 in( μ- σ,μ + σ]of the inflection point,and 0. 6826 times( 0. 6826a) of the range of semi variogram can be used as the standard survey spacing of classification of indicated mineral reserves. The main factor affecting the reliability of classification of mineral reserves is the robustness of the theoretical model of semi variogram established.更多还原