[Objective] An effective causal analysis of accidents is essential for learning from and preventing coal mine accidents. Manual analysis of accidents is strongly influenced by the subjectivity of the personnel involved and becomes inefficient for analyses involving large volumes of accident and risk text data. Although considerable research has been conducted in the area of accident text mining, most studies directly apply data mining techniques to extract accident information and factors from texts without considering accident causation theories. This approach leads to results that lack systematic and logical coherence. [Methods] To address the aforementioned issues, this paper proposes a method for the intelligent identification of accident causes in the coal mining sector. This method integrates entity recognition, semantic dependency analysis, text classification, and the accident causation “2-4” model (24Model). Specific implementation steps for this method are also provided. Accident causation theory is crucial for ensuring the effectiveness and scientific validity of accident analysis. This paper introduces the 24Model as a theoretical basis for accident cause identification, and the advantages of the model in the intelligent analysis of accident causes are highlighted. Entity recognition technology is employed to identify key entity information in accident texts, including information on personnel, organizational structures, accidents, abnormal characteristics, values, safety management, building facilities, environments, equipment and materials, safety policies, procedural documents, and operational processes. To effectively identify this information, this paper integrates the bidirectional encoder representations from transformers(BERT)-bidirectional long short-term memory(BiLSTM)-conditional random fields(CRF) model and trains the combined model using 660 accident texts. This paper utilizes semantic dependency analysis technology to identify the semantic relationships among entity information. Text representation patterns were extracted according to the definitions of unsafe individual actions and organizational factors by the 24Model, and these definitions were used to determine the types of accident causes. This paper utilizes a text classification method to develop a model for identifying individual capability-related causes, and the focus is on five aspects: knowledge, awareness, habits, and psychological and physiological factors. The text classification model was based on BERT. This paper evaluates the accuracy of the proposed method in identifying accident causes by comparing both the entity recognition model and the text classification model with similar models. Test cases were selected, and the results of accident cause analysis via the proposed method were compared with those from manual analysis. Additionally, this paper develops an application based on the proposed method to facilitate the analysis and learning of onsite accident cases by employees of coal mining enterprises. [Results] This research results showed that the precision rates of the trained entity recognition model and the text classification model reached 95.42% and 96.11%, respectively. Additionally, the accuracy of the accident cause identification method, when combined with semantic dependency analysis, reached 73.09%. [Conclusions] The contributions of this paper are as follows: (1) Integration of the definition and concept of the 24Model and the automatic identification of unsafe behaviors according to the 24Model. This approach helps avoid the strong subjectivity and inconsistency often present in accident analysis conducted by different personnel. (2) Further identification of the actors of actions, operational procedures, materials, and equipment. (3) Fusion of multimodel algorithms to identify the causes of accidents, allowing for the rapid analysis of a large number of accidents. (4) Facilitating the application of accident causation theory in coal mining enterprises, enhancing the effectiveness of accident case analysis and learning, thereby achieving the objective of preventing related accidents.
Key words
accident causation analysis /
named entity recognition /
semantic dependency parsing /
text classification /
accident causation “2-4” model
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