Abstract：Research purposes：With construction and development of the transportation infrastructures in China, more and more tunnels pass through coal measure strata and the area with gas to make gas accidents on the rise. Therefore, it is so urgent to study the gas disaster danger assessment system which conforms to the characteristics of tunnel engineering.
Research conclusions：Based on the researching the gas tunnels in China from the areas of the geological sectors, gas sectors and man-made sectors of influencing the danger of gas disaster in tunnel during construction, a relatively perfect gas disaster danger assessment system for tunnel is presented. This system can do the assessments at three levels, namely, gas tunnel classification assessments, danger assessment of gas tunnel construction and danger assessment of tunnel working face, to make a prompt and accurate assessment of gas disaster in the phases of route selection, design and construction, and take appropriate engineering control measures.
Gao Hongjie. The Gas Characteristics of Caishenmiao Tunnel on Xiangfan-Chongqing Railway and Its Treatment Measures[J]. Journal of Railway Engineering Society, 2009(10): 84-89.
2010, Vol. 27 
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