Tunnel construction safety operation method, protective cover and mesh bracket

The invention discloses a tunnel construction safety operation method, a protective cover and a mesh bracket. The safety operation method comprises the steps that a protective mesh or an anti-explosion mesh and/or the protective cover are installed; wherein the installation of the protective net sheet or the explosion-proof net and the protective cover is implemented based on a tunnel construction trolley with a lifting device, and the protective net sheet or the explosion-proof net and the protective cover are lifted by means of the lifting device; in the lifting process of the protective net piece or the anti-explosion net, the protective net piece or the anti-explosion net is supported by the arched latticed net piece bracket; the protective cover to be installed is provided with telescopic supporting legs and can be independently supported on a tunnel bottom plate through the telescopic supporting legs. The protective cover is used for providing safety construction protection, and the mesh bracket is used