摘要:
广域三维地层模型对铁路公路等重大基础设施勘察设计、地下空间资源开发、灾害风险评估等具有重要支撑作用。然而区域地质报告、地质图等广域范围地层数据存在地层信息描述粒度不一、缺乏地层邻接及空间分布关系的结构化描述、地层时空及属性特征信息零散缺少关联等特点；采用现有三维地层建模方法常运用的关系型实体组织模式组织广域范围地层数据会导致难以精准表达多维度关系和多元属性，影响广域地层建模效率。为此，提出了实体关联网络引导的三维地层建模方法，首先构建地层实体异构图关联网络，利用ChatGPT从地质报告中抽取的地层特征信息及地质图内蕴的地层特征信息，实现地层实体的时间-空间-属性特征及多域特征共同约束下关联关系的集成表达；并基于地层实体异构图关联网络快速构建虚拟钻孔，引导区域三维地层建模。选择典型区域，整合DEM、区域地质报告及地质图等数据的地层特征及关系信息，构建地层实体关联网络引导三维地层模型的生成，验证了本研究方法的有效性。
Abstract:
Objectives: Wide-area three-dimensional stratigraphic models play a crucial supporting role in the survey and design of major infrastructure projects such as railways and highways, the development of underground space resources, and disaster risk assessment. However, wide-area stratigraphic data, including regional geological reports and geological maps, are characterized by varying granularity of stratigraphic information, a lack of structured descriptions of stratigraphic adjacency and spatial distribution relationships, and scattered and poorly associated spatiotemporal and attribute characteristic information. The relational entity organization model commonly used in existing three-dimensional stratigraphic modeling methods to organize wide-area stratigraphic data struggles to accurately express multi-dimensional relationships and multi-attributes, thereby affecting the efficiency of wide-area stratigraphic modeling. Methods: To address this issue, we propose a three-dimensional stratigraphic modeling method guided by an entity association network. First, a stratigraphic entity heterogeneous graph association network is constructed. The stratigraphic characteristic information extracted from geological reports and the inherent stratigraphic characteristic information in geological maps, using ChatGPT, are utilized to achieve an integrated expression of association relationships under the joint constraints of the time-space-attribute characteristics and multi-domain characteristics of the stratigraphic entities. Based on the stratigraphic entity heterogeneous graph association network, virtual boreholes are rapidly constructed to guide regional three-dimensional stratigraphic modeling. Results: By selecting typical areas and integrating stratigraphic characteristics and relationship information from DEM, regional geological reports, geological maps, and other data, the stratigraphic entity association network is constructed to guide the generation of a three-dimensional stratigraphic model. Conclusions: The effectiveness of this research method was verified through these applications.
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