辽东白云金矿地质体三维模型的构建与储量估算

矿体三维模型是数字矿山的基础,是矿床的数字表征。在收集和整理研究区的地质图、地形图、地质剖面图、钻孔柱状图的基础上提取钻孔数据（样品信息表、钻孔形态表、钻孔位置表）,建立地质空间数据库,借助于Minexplorer探矿者软件建立地表模型,并依据地质空间数据库生成三维钻孔,通过定义剖面,圈定单工程矿体,连接主要出露地层、控矿构造与蚀变带,编辑剖面,连接曲面,封装成体等过程,构建出地质体的三维数字模型,实现其三维可视化。然后采用截面法、块段法、距离加权法对矿体进行储量估算并与矿山实际勘探获得的产量进行对比分析。结果表明,本矿区距离加权法计算的结果相对误差最小,同时也反向验证了三维矿体模型构建的准确性。

Establishment of 3D Geologic Modeling and Reserve Estimation in Baiyun Au Deposit

The three-dimensional model is not only based on digital mine,but also the digital representation of deposit.First,it builds the geological database using the drill data which extract from geological maps,topographic maps,geological cross-sectional view and bore histogram,including the Sampling information,the drilling form and the drilling location,then demonstrates the drill holes in 3D view.Second,after the process of profile definition,delineation of geologic body（ore body,fault,alteration zone,the outdoor layer） in a single drill hole,edition of profiles,connection of surfaces,encapsulation of surfaces based on Minexplorer software,it builds the geologic body in three dimensions,finally realization of the 3D visualization of the geologic body.It calculates the reserve of ore body by the section method,the block method,and the distance weighting method.The results are compared with the real reserve by the production of the mine.The results show that in the calculation of inverse distance weighted method there is minimum relative error,which in turn,verifies the accuracy of the 3D geologic body model.