复杂地层结构三维地质建模空间插值方法研究  

Spatial interpolation methods for 3D geological modeling of complex strata structures

作　　者：郑杨 简季[1] ZHENG Yang;JIAN Ji(School of Earth Sciences,Chengdu University of Technology,Chengdu 610059,Sichuan,China)

机构地区：[1]成都理工大学地球科学学院,四川成都610059

出　　处：《城市地质》2024年第1期121-128,共8页Urban Geology

摘　　要：三维地质体对于自然资源勘探、环境保护、自然灾害风险评估等领域都具有重要意义。在建模过程中,地质体的模型精度与插值算法有着直接关系。为研究不同插值算法的适用情况,文章对云南陆良某污染场地进行浅层三维地质建模,分别选取反距离权重法和自然邻域法,利用钻孔数据插值建模,并对模型结果进行目视检验和误差对比分析。研究结果表明:反距离权重法适用范围广,建模精度较高;相较于自然邻域法,反距离权重法更适用于地层结构复杂的三维地质建模,该方法对断层细节的描述更细致,模型更符合实际情况;而自然邻域法在断层明显的区域插值效果较差,不适用于地层结构复杂的情况。Three-dimensional(3D)geological bodies are of great significance in natural resources exploration,environmental protection,natural disaster risk assessment,and other fields.In the modeling process,the accuracy of geological body models is directly related to interpolation algorithms.To study the applicability of different interpolation algorithms,this paper conducted shallow 3D geological modeling in a heavy metal pollution area in Luliang,Yunnan.The inverse distance weighting method and natural neighborhood method were selected to interpolate the drilling data in the study area.Visual inspection and error comparison were carried out of the model results.The results show that the inverse distance weighting method has a wider applicability range and higher modeling accuracy.Compared to the natural neighborhood method,the inverse distance weighting method is more suitable for complex geological modeling with distinct stratigraphic structures,providing a more detailed description of fault details and a model that better reflects reality.On the other hand,the natural neighborhood method has poor interpolation performance in areas with distinct faults and is not suitable for complex stratigraphic structures.

关 键 词：三维地质模型 钻孔数据 反距离权重法 自然邻域法 精度验证 

分 类 号：P628[天文地球—地质矿产勘探]