A Knowledge Graph Construction Method for Tunnel Boring Machine Jamming Risk Assessment Based on Multi-Factor Semantic Associations
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摘要:
复杂山区全断面隧道掘进机(tunnel boring machine,TBM)施工常面临断层破碎带及围岩大变形等不良地质条件,易引发卡机事故. TBM卡机风险评估涉及监测数据、经验规则等多源异构信息,现有研究多侧重于评估数据或模型的局部建模,缺乏对关键评估要素及其语义关系的系统刻画,导致风险表达结构碎片化,难以支撑复杂工况下的动态评估与分析. 针对上述问题,提出一种多要素语义关联的TBM卡机风险评估知识图谱构建方法,该方法通过整合“评估任务-评估数据-评估参数-评估模型-评估指标”5类核心要素构建本体结构,实现风险评估过程的语义关联表达;结合大语言模型的分步提示策略,从风险评估文献、施工标准及工程案例中抽取显性与隐性知识,并通过消融实验验证提示策略的有效性;进一步利用 Neo4j 图数据库实现知识图谱的结构化存储与管理. 实验结果表明:在构建的标注数据集上,知识抽取精确率为88.54%,召回率为83.42%,F1值为85.67%,相较于仅使用单一提示策略具有明显提升;典型工程案例分析显示,所提方法能够有效组织卡机风险相关要素,在风险信息表达完整性与语义组织方面具有良好表现,为卡机风险的结构化表达与评估提供了有效支撑.
Abstract:In complex mountainous areas, tunnel boring machine (TBM) construction often faces adverse geological conditions, such as fault fracture zones and large deformation of surrounding rock, which can easily cause jamming accidents. TBM jamming risk assessment involves multi-source heterogeneous information such as monitoring data and empirical rules. Existing studies mostly focus on the local modeling of assessment data or models and lack a systematic characterization of key assessment factors and their semantic associations, leading to a fragmented risk representation structure, which makes it difficult to support dynamic assessment and analysis under complex conditions. To address the above issues, a construction method of a knowledge graph for TBM jamming risk assessment based on multi-factor semantic associations was proposed. This method constructed an ontology structure by integrating five types of core factors: "assessment task, assessment data, assessment parameter, assessment model, and assessment indicator", achieving semantic association representation of the risk assessment process. Combined with a stepwise prompting strategy of a large language model, explicit and implicit knowledge was extracted from risk assessment literature, construction standards, and engineering cases, and the effectiveness of the prompting strategy was verified through ablation experiments. Furthermore, the Neo4j graph database was utilized to realize structured storage and management of the knowledge graph. The experimental results indicate that on the constructed annotated dataset, the precision, recall, and F1 score of knowledge extraction are 88.54%, 83.42%, and 85.67%, respectively, showing a significant improvement compared with using a single prompting strategy. The analysis of typical engineering cases shows that the proposed method can effectively organize factors related to jamming risk, exhibits a good performance in the completeness of risk information representation and semantic organization, and provides effective support for the structured representation and assessment of jamming risk.
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Key words:
- TBM tunneling /
- jamming risk /
- knowledge graph /
- large language model /
- ontology construction
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表 1 定义概念间关系
Table 1. Definition of relationships between concepts
关系类型 说明 Has_Task 表示任务与子任务之间的关系,描述不同的卡机风险事件 Required_Model 描述任务与模型之间的关系,表明任务使用或关联某个模型 Required_Data 表示任务与数据之间的关系,描述某个任务使用的数据 Required_ Parameter 表示任务与参数之间的关系,描述某个任务使用的数据参数 Required_Metric 表示任务与指标之间的关系,指示某个任务使用的评估指标 Mapping_to 表示输出参数与输入参数之间的一对一映射关系 Consist _of 表示输出参数与输入参数之间的一对多关系 Input 通常用于定义模型所需的输入参数 Output 表示模型生成的结果或输出参数 Subclass_of 表示实体间的上下级关系 Property_of 表示实体的属性信息 Instance_of 表示某个实例属于某个类,描述具体实例与类的隶属关系 表 2 基于规则的半结构化数据信息提取与融合(示例)
Table 2. Rule-based extraction and integration of semi-structured data information (example)
类别 实体 原始表述 匹配规则设计 处理操作 地质术语 软弱带 软弱夹层、不良地质体、软弱地带 模糊匹配关键词:软弱、夹层、不良地质 实体融合统一为软弱带 卡机原因分类 地质因素卡机 地质因素、地质条件卡机、地质卡机 上下文关键词卡机前缀包含地质相关词汇 分类归一化 属性名称冲突 施工区段 工区、盾构区间、施工段 标准化映射表:工区定义为施工区段;盾构区间定义为施工区间 属性名对齐 属性值冲突 推进速度 日进尺、掘进速度 正则替换单位统一为 m/d 单位转换 + 标准化 表 3 消融实验结果
Table 3. Results of ablation experiment
% 提示策略 P R $\rho_{\mathrm{F1}} $ 需求提示 72.13 65.45 68.63 需求提示 + 领域知识提示 81.27 75.91 78.48 需求提示 + 样例提示 86.35 81.22 83.70 完整的三步法提示策略 88.54 83.42 85.67 -
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