为了解决高海拔地区的富氧安全问题,通过实验模拟高原低气压环境,研究了滤纸、棉布和涤卡在富氧环境下燃烧速度的变化情况.由实验可得,氧分压不变时,随着海拔的升高,材料的燃烧速度显著加快.结果表明,在高海拔地区,富氧到与一个标准大气压中氧分压一致,会产生火灾危险.通过对实验数据的分析,得出了高原低气压环境下室内富氧的安全氧浓度上限. In order to solve the problem of oxygen-rich safety in high altitude areas, the change of burning rate of filter paper, cotton cloth and polyester card in oxygen-enriched environment was studied by simulating the low-pressure environment in the plateau experimentally.When the oxygen partial pressure was constant, As the altitude increases, the burning rate of the material increases significantly.The results show that at high altitude, oxygen enrichment is consistent with the oxygen partial pressure in a standard atmosphere, resulting in a fire hazard.By analyzing the experimental data, Upper limit of safe oxygen concentration for oxygen enrichment in indoor environment under low atmospheric pressure.