2005年9月2日,北京市朝阳区某施工现场,一作业人员配戴防毒面具进行井下作业时发生意外,导致作业人员死亡。从电视画面上,我们注意到作业者使用的是过滤式防毒面具,而非隔绝式防毒面具。作业人员是因缺氧或吸入有毒气体而死亡。在没有正确判断作业环境存在污染物的性质、污染物浓度是否高于相关标准及作业环境是否缺氧的情况下,选择不恰当的呼吸防护用品进行作业,从而导致事故的发生,这样的事件已 September 2, 2005, a construction site in Chaoyang District, Beijing, an operator wearing gas masks accident downhole operations, leading to the death of workers. From the television screen, we noticed that operators used filtered gas masks, rather than isolated gas masks. The operator died of oxygen deficiency or inhalation of toxic gases. In the absence of a correct judgment of the nature of the operating environment of pollutants, pollutant concentration is higher than the relevant standards and the operating environment is lack of oxygen, the choice of inappropriate respiratory protection supplies for work, resulting in the accident, such an event has been