FTA在地铁隧道爆破作业安全控制中的应用研究

Study on FTA in Security Control of Subway Tunnel Blasting Excavation

在地铁隧道爆破掘进过程中,运用FTA分析法,在对爆破掘进事故分析总结的基础上,建立地铁隧道爆破事故树,求解出地铁隧道爆破事故树的最小割集,计算各基本事件结构重要度并排序。结果表明所有事件中"爆破方案审核缺陷,未及时发现存在的问题"危险性最大。在FTA分析结果基础上,提出了相应的地铁隧道爆破安全控制措施。该研究对保证爆破掘进安全具有一定的指导意义。

In the process of subway tunnel blasting excavation,on the basis of the analysis summary in blasting excavation accidents,a fault tree of subway tunnel blasting was built through FTA. After a qualitative analysis on the tree,the minimum cut sets were gotten. Then the structure important degree of every basic event was calculated and arrangement. The results show that"audit defects of blasting scheme,failed to find the existed problems timely"is the biggest risk. Based on the FTA analysis results, corresponding safety control measures of subway tunnel were proposed. The studies have certain guiding significance for the safety of subway tunnel blasting excavation.