关键词: 关键词：超长海底隧道, 无竖井排烟, FDS模拟, 排烟量, 补风量

Abstract: Abstract: With the global climate change, especially the obvious warming trend and the increase of human disturbance activities, the possibility of disastrous forest fires in the main distribution areas of the world's forests continues to increase. This paper introduces the concept of disastrous forest fires at home and abroad, and compares the research contents and main research methods of disastrous forest fires. The results show that the pattern and scale of existing disastrous forest fire research are small, mainly focusing on the occurrence and development of summer forest fires, and less research on the mechanism of major forest fires in higher altitude mountain forests. Future research should integrate remote sensing and geographic information system and other large-scale methods, focuses on long-term and dynamic study on the vegetation and weather characteristics of disastrous forest fires in large and mesoscale patterns. In-depth research should be carried out on the fire behavior, fire loss and long-term effects of disastrous forest fires, so as to provide the basis for forest fire prevention and control.

Key words: Key words: large forest fire, fire environment, fire behaviors, fire management policy