明垭子隧道右洞工作面施工时拱顶发生塌方,并伴有大流量涌水。在分析塌方原因后,结合工程地质情况,基于强预支护原理,采用双层超前小导管双浆液注浆加固技术来治理塌方区,并取得了明显效果。由此证明了用强预支护原理来指导隧道塌方治理是合理有效的。 During the construction of the right tunnel of Mingyazazi Tunnel, the collapse of the vault occurred, accompanied by large flow of gushing water. After analyzing the cause of landslip, combined with the engineering geological conditions, based on the principle of strong pre-support, the double-layer advance small duct double slurry grouting reinforcement technology was used to treat the landslide area and the obvious effect was achieved. This proves that it is reasonable and effective to guide the tunnel landslide management with strong pre-support principle.