通过模拟高原环境，研究温度与气压的变化对乳化炸药爆速、猛度的影响，并通过显微镜观察乳化炸药的微观结构，研究其性能改变的原因，以利于指导高原地区乳化炸药的使用以及爆破参数的设计。实验结果表明：若温度为0 ℃不变时，海拔不超过2 500 m，乳化炸药的性能基本保持不变；海拔为2 500 m以上时，乳化炸药性能会迅速降低。而若温度随着海拔高度的增加而降低时，乳化炸药的爆速、猛度会迅速降低。在海拔为2 500~3 500 m时，化学敏化的乳化炸药敏化气泡开始转变为无效气泡。

Influences of temperature and air pressure changes on detonation velocity and brisance of emulsion explosive were studied under the condition of simulating plateau environment, and microstructure of emulsion explosive was observed by microscopic method to explore the reasons for its performance changes. It was helpful to guide the use of emulsion explosive and the design of blasting parameters in plateau area. Experimental results show that the performances of emulsion explosive remain basically unchanged when the temperature remains unchanged at 0 ℃ and the altitude is 2 500 m or below, while they will decrease rapidly when the altitude is above 2 500 m. However, if the temperature decreases with the increase of altitude, detonation velocity and brisance of emulsion explosive will decrease rapidly. When the altitude is between 2 500 m and 3 500 m, sensitized bubbles of chemically sensitized emulsion explosive begin to transform into ineffective bubbles.