矿体品位和储量统计分析的三维可视化方法  

3D Visualization Method of Analysis and Estimation of Orebody Grade and Reserves

作　　者：罗周全[1] 张保[1] 刘晓明[1] 鹿浩[1] 李畅[1] 

机构地区：[1]中南大学资源与安全工程学院,长沙410083

出　　处：《有色金属（矿山部分）》2008年第5期23-27,共5页NONFERROUS METALS(Mining Section）

基　　金：国家自然科学基金资助项目(编号:50490274);"十一五"国家科技支撑计划课题(编号:2006BAB02B05)资助

摘　　要：运用三维可视化手段,可快速实现矿体品位和储量的高精度估算。其基本方法是:先用三维可视化软件根据矿床地质勘探资料建立起地质数据库,并建立矿体的三维实体模型,精确模拟矿体的形态;其次,建立矿体块体模型,应用块模型方法对矿体内部进行划分;在此基础上,采用地质统计学方法对矿体内部特性数据进行赋值估算,获得矿体内部所有块的特性数据,最后完成矿床品位和储量的统计分析和计算。本文借助大型三维可视化矿山软件Surpac,在建立某金属矿床的地质数据库和矿体三维实体模型的基础上,建立了矿体的块体模型,分别采用普通克里格法和距离幂次反比法,对该矿床的品位和储量进行分析和估算,并将其结果与用传统的地质块段法计算的结果进行了对比和分析。实践证明,可视化方法不但效率高且结果可靠。The grade and reserves of orebody can be analyzed and estimated quickly and precisely using the 3D visualization means. The essential method is as follows： Firstly,the geological database is built based on the geological exploration data using 3 D visualization software, and then, the 3 D DTM model of orebody is established using the software, so that, the shape of the orebody is simulated accurately. Secondly, the block model of orebody is established to disassemble the inner of the orebody with the block model method. Thirdly,the specialty data of orebody are evaluated using the geostatistics methods and get all the specialty data of orebody blocks. Finally, the analysis and estimation of the grade and reserves of orebody are accomplished. In this paper, the geological database,3D DTM model and block model of the depth orebody of a metal mine are established using the large 3D visualization mine software Surpac ,the ordinary Krige method and the distance power inverse ratio method are used to analyze and estimate the orebody grade and reserves. And also, the evaluation results of these two methods are analyzed and contrasted with the calculation result of the traditional geological block method respectively. It is proved that the visualization method is effective and reliable.

关 键 词：品位 储量 三维模型 距离幂次反比法 普通克里格法 

分 类 号：P628.3[天文地球—地质矿产勘探]