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,建立了樓房拆除爆破事故因果分析圖和事件樹,因此進一步展現(xiàn)事故發(fā)生的原因和結(jié)果之間的邏輯關(guān)系和事故的動態(tài)發(fā)展過程。