别岩槽隧道为宜万铁路首批开工的重难点、咽喉工程，被列为宜万铁路I级风险隧道。该隧道地质极为复杂，尤其是溶洞和地下暗河非常发育，被形象地称施工中可能有“六冒”现象发生。文章介绍了该隧道利用综合地质超前预报技术，避免了地质灾害事故的发生，保证了安全施工，并结合实践，总结了高风险隧道的地质超前预报综合技术。

Bieyancao Tunnel is a key project and listed as level I risky tunnel on Yichang-Wanzhou Railway. This tunnel's geological condition is very complex especially the developed karst cave and underground river. It is considered that serious geological disasters called "LiuMao"  phenomena are most likely to occur in construction process. The article introduced that with the help of comprehensive ahead geological forecasting ,this tunnel assured the safety and avoided the geological hazard accidents. It also summarizes the comprehensive geological prediction technology of risky tunnel based on the practice.