Abstract:Based on the domestic 3D mining software DIMINE, the geological exploration data of the 750~ 800 m level section of No.1 vein group in the South ore section of Baiyinuoer Pb-Zn mine are systematically collected and sorted. Through the establishment of a geological database, the three-dimensional model of ore and rock， the whole process of data analysis and processing and resource reserve estimation are systematically established， and the characteristics of the ore body and surrounding rock model, ordinary Kriging estimation method, and application characteristics are compared. The results show that five ore bodies are delineated. The model shows that the ore bodies are mainly located in the contact zone between diorite porphyrite and crystalline limestone which is a typical skarn deposit. The spatial distribution shape is saccular, large vein and lens, and the overall NE trend. According to the geostatistical theory, the theoretical variogram obtained by fitting is applied to the ordinary Kriging estimation. The total controlled and proved resources are estimated to be 186 600 tons and the Pb+Zn grade is 4.04%. Compared with traditional methods, ordinary Kriging estimation errors are within a reasonable range, with good application effect and high estimation accuracy. It can provide a reference for mine mining design and provide an important theoretical basis for realizing mine digitization.