The Event Tree and cause-effect graph of building blasting accidents are founded to state clearly the potential causes initiating the accidents and its correlations, and to display the accident's moving developing procedure. 其次,建立了楼房拆除爆破事故因果分析图和事件树,因此进一步展现事故发生的原因和结果之间的逻辑关系和事故的动态发展过程。