The national infrastructure construction has entered a new stage of rapid development,and the construction of the West Sichuan Tunnel has also shown a dense development trend.During the tunnel construction process,gas outburst disasters occur frequently,causing huge economic losses and significant casualties.This article relies on all the gas tunnels of the Wenma Expressway and the Jiuma Expressway that have been built in the western Sichuan Plateau.Through data collection,on-site investigation,and numerical analysis,three types of gas emission mode of gas tunnel disasters in non-coal bearing strata are summarized:① direct exposure type of hydrocarbon generating strata;② Deep buried gas reservoirs with connected gas conducting structures;③ The indirect exposure type of gas source structure reveals.For gas conducting structural gas tunnels,it is found that when faults intersect with the face of the tunnel,local gas enrichment is prone to occur,this reveals the influence of different types of gas conducting structures such as faults on the gas escape law of shallow buried tunnels.
关键词
瓦斯涌突/瓦斯隧道/非煤系地层/瓦斯逸散/涌出模式
Key words
gas outburst disasters/gas tunnel/non coal bearing strata/gas escape/gas emission mode
维普
万方数据