基于地质统计学与Surpac的某铅锌矿床储量计算

Resources Calculation of a Lead-Zinc Deposit Based on Geostatistics and Surpac

地质统计学是一种通用的地质研究和储量计算方法,而Surpac软件则使得利用地质统计学原理进行品位推估和储量计算变得简便和直观。建立了某铅锌矿床地质数据库与三维矿体模型,根据地质统计学原理对钻孔样品数据进行了组合分析,并通过对实验变异函数的拟合和交叉验证,建立了合理的变异函数模型;构建起了矿体块体模型,采用普通克立格法对矿床元素Pb和Zn的品位进行了估值,并按元素种类和中段进行了平均品位和储量的计算,与矿山现有计算对比的结果表明,所建模型和计算结果可靠,可用于矿山资源评估、采矿计划编制等工作。

Geostatistics is a very onventional approach of geological studies and reserves calculation at present,and Surpac software make the grade estimation and reserves calculation of mineral deposit by geostatistics become more simple and intuitive.The three-dimensional ore body model and geologic database of a lead-zinc deposit were established.According to geostatistics,the combinatorial analysis on the data of borehole samples was made.On the basis of the fitting and cross-validation of experimental variograms,a reasonable variogram model was established.A the block model of the ore body was established,and the grade of lead and zinc of the mineral deposit were estimated by ordinary Kriging,the average grade and reserves were calculated according to metal elements and sub-level respectively,and the results were compared with that calculated by the mine.The result of comparison showed that the three-dimensional model established for the mineral deposit and the calculation results are reliable and useful to the reserves estimation mining plan making and so on for the mine.