瓦斯爆炸因其具有危险源分布广泛、突发性强和危害性大等特点，成为煤矿重大灾害之一。本文针对煤矿瓦斯爆炸风险问题，通过安全信息理论研究和瓦斯爆炸案例分析等综合方法，构建了安全信息损失视域下的事故致因模型和风险度量指标体系，提出了基于未确知测度理论和组合赋权的瓦斯爆炸风险度量方法，实现了瓦斯风险量化。

       首先，在界定安全信息概念的基础上，明确安全信息传递过程及损失影响因素，分析并总结近年来80起较大及以上煤矿瓦斯爆炸的安全信息损失，根据事故案例分析结果和安全信息学理论，构建煤矿瓦斯爆炸事故致因模型，揭示安全信息损失对煤矿瓦斯风险的重要影响。其次，根据多起事故案例安全信息损失分析结果和事故致因模型重点内容，通过对高频安全信息损失进行详细释义阐述和系统关键点探究，结合指标体系构建原则构造煤矿瓦斯爆炸事故风险度量指标体系，实现在安全信息视角下的瓦斯爆炸风险全过程评价。再次，根据瓦斯爆炸事故风险分级标准构造煤矿瓦斯风险因素空间、未确知测度函数和风险等级空间，结合法律法规、标准规范和相关文献确定各度量指标分级准则，邀请多位专家对指标进行赋权，并通过专业、学历、工龄和专业综合计算专家可信度，以处理赋权结果，运用组合赋权法确定指标权重，计算多指标测度矩阵，依据集对势计算多元联系数，确定系统风险等级。最后，通过对山西某矿瓦斯爆炸风险进行度量计算，验证本研究风险度量方法的可行性，提出事故防范措施和安全信息管理建议。

       研究结果表明，安全信息损失对煤矿瓦斯爆炸事故演化具有重要影响，感知环节受作业人员工作状态、企业安全培训强度及工程监督落实程度最容易出现损失。基于未确知测度可实现对安全信息传递过程中各损失风险的准确度量，研究结果为量化煤矿瓦斯爆炸事故风险提供理论基础，为煤矿瓦斯爆炸安全信息损失预防和控制提供管理思路。

       China’s energy reserves and consumption structure determines the main position of coal resources, in the context of energy transformation coal resources to continue to play a good bottom and security role, however, due to the complex conditions of China’s coal deposits, a variety of disasters coupled superposition, including gas accidents due to the wide distribution of hazardous sources, concealed breeding process, sudden and strong, destructive charac- teristics, has become the largest number of casualties of the type of accident. Although gas explosion accidents have been significantly reduced in recent years, there is still a gap between the goal of maintaining and promoting “zero protrusion and zero explosion” in coal mines. Given the constant exchange of material, energy and information in the system, information is generally considered to be the vehicle that relates and expresses the system. In order to understand the accident incubation process in coal mine gas systems, it is necessary to focus on the process of coal mine safety information transfer and loss. Therefore, this paper uses safety information loss as an entry point to reveal the risk of coal mine gas explosion accidents and quantifies coal mine gas risk using theories and methods such as unascertained measure.

       Firstly, on the basis of defining the concept of safety information, I clarify the process of safety information transmission and loss influencing factors, analyze and summarize the safety information loss of 80 large and above coal mine gas explosions in recent years, construct the accident-cause model based on the analysis results of accident cases and safety informatics theory, and reveal the important influence of safety information loss on coal mine gas risk. Secondly, according to the analysis results of safety information loss of many accident cases and the key contents of accident causation model, through the detailed interpretation of high-frequency safety information loss and systematic key point investigation, combined with the principle of index system construction to build a coal mine gas explosion accident risk metric system, to realize the whole process of gas explosion risk research under the perspective of safety information. Thirdly, the coal mine gas risk factor space, unconfirmed measurement function and risk level space are constructed according to the gas explosion accident risk grading standards, and the grading guidelines of each metric are determined by combining laws and regulations, standard norms and related literature, and several experts are invited to assign weights to the metrics, and professional credibility is calculated by profession, education, length of service and specialty to process the expert assignment results, and the combination assignment method is used to determine the metrics Weights, calculate multi-indicator measurement matrix, calculate multivariate coefficients based on set-pair potential, and determine the system risk level. Finally, the feasibility of the risk measurement method of this study is verified by calculating the metric for the risk of gas explosion accident in a mine in Shanxi, and accident prevention measures and safety information management suggestions are proposed.

       The research results show that safety information loss has an important influence on the evolution of coal mine gas explosion accidents, and the induction link is most susceptible to loss by the work status of operators, the intensity of enterprise safety training and the degree of implementation of engineering supervision. Based on the unconfirmed measure can achieve an accurate measure of the risk of each loss in the process of safety information transmission, the research results provide a theoretical basis for quantifying the risk of coal mine gas explosion accidents, and provide management ideas for the prevention and control of coal mine gas explosion safety information loss.