Abstract:

In order to prevent or reduce the occurrence of coal mine fire and explosion accidents, excavate the key disaster-causing factors of coal mine fire and explosion, and clarify the mechanism of action between the causes, firstly, based on the domestic coal mine fire accident cases, 26 disaster-causing factors of coal mine fire and explosion were analyzed. Then, based on the complex network theory, the disaster-causing factor network of coal mine fire and explosion was constructed, and the network topology characteristic parameters such as degree centrality, clustering coefficient, and betweenness centrality were calculated to analyze the characteristics of the disaster-causing factors of coal mine fire and explosion. Finally, the risk index of coal mine fires causing chains were introduced to calculate the risk degree of different edges, the high-risk edge was excavated, and the chain-breaking measures were put forward. The results show that the network of key disaster-causing factors for coal mine fire and explosion has the characteristics of a small-world network, and the conversion path between causes is short. The key disaster-causing factors include workers' illegal operations, ventilation equipment failure, power failure, and supervisors' dereliction of duty. The most dangerous aspect is the failure of supervision personnel to perform their duties and the illegal operations by workers, followed by spontaneous coal combustion and high temperature radiation. Before the fire occurs, effective measures are taken to control the key nodes. Following the occurrence of the fire, the high-risk chain-breaking operation can achieve the effects of disaster prevention and mitigation while actively controlling the occurrence and development of coal mine explosion fire.

Key words: coal mine fire, explosion disaster causing factor, complex network, topological features, risk degree