基于地质统计学估算矿区矿产资源量研究

Study on Quantity Estimation of Mineral Resources in Mining Area Based on Geological Statistics

为了提高固体矿产资源量估算精度且准确、直观反应品位属性的空间分布,对多样成矿作用使矿体边界形态复杂,矿石品位属性呈各向异性结构和随机并存的空间变异模式进行了分析,对平均估算方法估算复杂品位属性分布出现偏差的原因进行了分析。在分析安庆铜矿中心矿区矿石品位属性空间变异特征的基础上,采用地质统计学及三维地学模拟技术构建了三维品位属性模型,并估算其资源量。结果表明,地质统计学方法相对传统方法估算精度高,有效降低了估算偏差。

In order to improve the quantity estimation accuracy of the solid mineral resources and to accurately and directly describe the spatial distribution of the grade attribute, an analysis was conducted on the complicated shape at the mineral boundary affected by the di- versity metallogenesis, each directional difference, structure and random existed spatial variation mode of the mineral grade.An analysis was conducted on the error causes occurred in the complicated grade attribute distribution estimated with the average estimation method.Based on the analysis on the spatial variation features of the mineral grade in the central mining area of Anqing Copper Mine, the geological statis- tics and the 3D geosciences simulation technology were applied to establish 3D grade attribute model and to estimate the resource quantity. The results showed that the geological statistics method would have a higher estimation accuracy than the traditional method, could effec- tively reduce the estimation error.