针对我国伤亡人数较多的采矿行业，对伤亡人数最多的瓦斯爆炸事故进行了分析，提出了改进Bow-tie模型。在原因辨识环节将瓦斯爆炸事故的原因归纳为人因、物因、环境、管理4个方面进行论述，利用屏障思维对主动屏障进行量化分级提出预防措施，通过模型分析事故可能产生的安全、经济、环境、社会后果，提出消减措施作为被动屏障，绘制改进Bow-tie图，并在此基础上运用层次分析进行评价分析。研究表明，管理体系欠缺以及人的不安全行为是导致事故发生的主要因素。

In view of the mining industry with a large number of casualties in China, the gas explosion accident with the largest number of casualties is analyzed, and an improved Bow-tie model is proposed. In the process of cause identification, the causes of gas explosion accidents are summarized into four aspects : human factor, material factor, environment and management. The barrier thinking is used to quantify and classify the active barrier, and the preventive measures are put forward. Through the model analysis of the possible safety, economic, environmental and social consequences of the accident, the reduction measures are put forward as the passive barrier, and the improved Bow-tie diagram is drawn. On this basis, the analytic hierarchy process is used for evaluation and analysis. Studies have shown that the lack of management system and people 's unsafe behavior are the main factors leading to accidents.