The hazard before, in and after demolishing of a mansion was analyzed and evaluated accordings to the methods of Preliminary Hazard Analysis (PHA) and Task Hazard Analysis (THA).

• 摘要采用预先危险分析(PHA)与作业危险分析(THA)相结合的方法，对某大厦的爆破施工、起爆、爆破后等实施过程的危险性进行了分析与评价。