2、后果严重性的指标体系基础上，建立了燃气行业安全风险评估分级模型，模型通过层次分析法计算各指标的权重，采用线性加权平均模糊综合评判模型对研究对象进行风险评估，最后根据风险矩阵判定风险等级。因此，燃气行业风险评估分级标准可通过分别对“点”“线”“面”进行风险评估分级来实现，此模型对于推进城镇燃气行业风险评估工作的完整性和标准化具有一定的参考意义。关键词：城镇燃气，点-线-面，AHP-模糊综合评价，风险分级DOI编码：10.3969/j.issn.1674-5698.2018.05.032Study on Classificat
3、ion Criteria of Point - Line - Surface Based Safety RiskAssessment for Gas Industry in Beijing（II）—— Risk Assessment Classification ModeLV Hui1ZHANG Hui2ZHU Wei1JI Xue-wei2WANG Qian3WU Ai-zhi2（1.Beijing Research Center of Urban System Engineering; 2.Beijing A
4、cademy of Safety Science and Technology;3. School of Safety and Environmental Engineering, Capital University of Economics and Business）Abstract: In view of the current urban gas risk assessment research mostly focusing on one aspect of the system, such asspecial
5、research on gas pipe network, gate station and indoor gas pipeline, a lack of risk assessment classification criteriain a complete urban gas transmission and distribution system. Based on the possibility index system and the consequenceseriousness index system of
6、gas gate station, pipeline and community, this paper establishes the safety risk assessmentclassification model in gas industry, evaluates the weight of each index through analytic hierarchy process, conductsrisk assessment of the research object by the linear wei
7、ghted average fuzzy comprehensive evaluation model, and finallydetermines the gas risk level according to the risk matrix. Therefore, the risk assessment classification criteria in gasindustry can be achieved by the risk assessment classification of "point", "line
8、" and "surface" respectively. This model hassome reference significance for promoting the integrity and standardization of urban gas industry risk asses
