面向矿产资源储量计算的三维训练图像构建方法  

3D Training Image Construction Method for Reserve Calculation of Mineral Resources

作　　者：王永志[1,2] 陈郁良 谢民民 余梦柔 胡晓宇 王宝娟 WANG Yongzhi;CHEN Yuliang;XIE Minmin;YU Mengrou;HU Xiaoyu;WANG Baojuan(School of Civil Engineering and Surveying and Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;School of Geography Science and Geomatics Engineering,Suzhou University of Science and Technology,Suzhou 215009,China)

机构地区：[1]江西理工大学土木与测绘工程学院,江西赣州341000 [2]苏州科技大学地理科学与测绘工程学院,江苏苏州215009

出　　处：《金属矿山》2023年第5期247-253,共7页Metal Mine

基　　金：国家自然科学基金项目(编号:42061061);江西省青年井冈学者奖励计划项目(编号:QNJG2020046);江西省研究生创新专项资金项目(编号:YC2021-S561)。

摘　　要：矿产资源储量计算有助于合理开发利用矿产资源,目前多点地质统计学是矿产资源储量计算的热门技术,但多点地质统计学中高质量三维训练图像构建较为困难。因此,提出了一种面向矿产资源储量计算的三维训练图像构建方法。该方法首先基于原始钻孔等数据构建三维地质模型,并对其使用不规则四面体网格剖分得到体元模型;然后基于钻孔属性数据采用插值算法构建规则体元品位模型,并对体元模型进行欧氏距离的属性赋值得到三维训练图像;最后采用多点地质统计学改进的Snesim算法构建搜索树获取条件概率,并进行相关性的属性融合给矿体待估值体元模型赋属性,进而计算矿产资源储量。以黑牛洞Ⅰ-3号矿体为例,计算得到该矿体铜平均品位为2.90%,与开采后的铜平均品位2.33%相比,相差仅0.57个百分点,证明了所提方法的正确性和有效性。The calculation of mineral resources reserves is helpful to the rational development and utilization of mineral resources.At present,multi-point geostatistics is a popular technology for the calculation of mineral resources reserves,but it is difficult to construct high-quality three-dimensional training images in multi-point geostatistics.Therefore,a 3D training image construction method for mineral resource reserve calculation was proposed.Firstly,the 3D geological model is constructed based on the original borehole data,and the volume element model was obtained by using the irregular tetrahedral mesh.Secondly,based on the borehole attribute data,the regular volume element grade model was constructed by interpolation algorithm,and the attribute was assigned by Euclidean distance to the volume element model to obtain the 3D training image.Finally,the Snesim algorithm improved by multi-point geostatistics was used to construct a search tree to obtain the conditional probability,and the attribute of the volume element model was assigned based on a attribute fusion of correlative,and the mineral resources reserves were calculated.Taking the HeiniudongⅠ-3 orebody as an example,the average grade of copper inⅠ-3 orebody is calculated to be 2.90%,the average grade of copper after mining is 2.33%,the difference between them is only 0.57 percentage points,which proves the correctness and effectiveness of the proposed method.

关 键 词：多点地质统计学 三维训练图像 矿体属性建模 矿体资源储量计算 

分 类 号：TD15[矿业工程—矿山地质测量]