基于块段范围立体约束的块段三维建模方法

Block 3D modeling method based on block range stereo constraints

为了解决现有矿体三维建模方法无法实现对矿体各块段精细化表达的问题,提出了基于块段范围立体约束的块段三维建模方法,通过块段范围立体与矿体三维模型进行三维布尔运算求交,从而对矿体各块段进行三维建模。以河南省黄庄金矿为研究对象,以黄庄金矿详查报告中相关数据为数据源,采用基于块段范围立体约束的块段三维建模方法,开展了对黄庄金矿Au-Ⅰ矿体各块段三维建模及资源量估算等方面的实验研究。研究结果表明,通过该方法能够建立矿体各块段三维模型,块段三维模型能准确表达各块段三维空间形态特征;基于各块段三维模型估算的Au-Ⅰ矿体资源量较详查报告中地质块段法估算的金金属量多7.81 kg,变化率为4.27%,矿体7个块段中,资源量估算结果变化率最大为12.14%,变化率最小为1.76%;二者存在差异的主要原因是地质块段法对各块段进行了投影处理,由此造成了各块段体积计算的差异引起。

In order to solve the problem that the existing ore body 3D modeling methods can not achieve the fine expression of each ore body block,this paper proposed a block 3D modeling method based on the block range stereo constraints.By performing 3D Boolean operations on the intersection of block range stereo and ore body 3D model,the purpose of 3D modeling of each ore body block was achieved.This paper took Huangzhuang Gold Mine in Henan Province as the research object,took the relevant data in the detailed survey report of Huangzhuang Gold Mine as the data source,and adopted the block 3D modeling method based on the stereo constraints of the block range to carry out the experimental research on the 3D modeling and resource estimation of each block of the Au-Ⅰore body in Huangzhuang Gold Mine.The research results show that the 3D model of ore body can be established by this method,and the 3D model of block can accurately express the 3D spatial morphological characteristics of each block.The Au-Ⅰore body resource estimated based on the block 3D model is 7.81 kg more than that estimated by the geological block method in the detailed survey report,with a change rate of 4.27%.Among the seven blocks of the ore body,the maximum change rate of the resource estimation results is 12.14%,and the minimum change rate is 1.76%;the main reason for the difference between the two is that the geological block method has carried out projection processing on each block,which results in the differences in volume calculation of each block.