Research on extraction of gas explosion scenario elements and scenario construction method based on historical accident cases

In order to deeply explore the development law of coal mine gas explosion accidents, a method to analyze and extract the scenario elements of gas explosion accidents based on Chinese word segmentation technology was proposed. First of all, 733 gas explosion accident reports from 1978 to 2020 were collected and counted through the coal safety network and other means. On this basis, data preprocessing was carried out. Incomplete accident reports were excluded, and 255 gas explosion accident reports were finally selected for the element analysis and extraction. The classification, process and cause of accidents were sorted and stored to form a corpus of texts to be mined. Keywords of gas explosion accident scenario were extracted based on Jieba word segmentation algorithm, and TF-IDF algorithm for weight calculation. The scenarios were divided into 4 dimensions and 24 elements, including accident body, disaster-causing body, disaster-bearing body and disaster-resistant body, which provided a reference basis for the scenario representation of the subsequent gas explosion accidents and the possible cause combination for the future possibilities of the accidents.