Abstract: The dynamic pressure heading damage mechanism and supporting principle was analysis, and through the Ⅳ 3 Huaibei by dynamic pressure influence wheel-driven, the characteristics of the steel grids tunnel 3D bolt-shotcrete support new structure was research and design.This supporting structure has greatly improved spray layer, and the bending capacity overall has certain shrink retractable, thus the supporting structure can bear larger deformation pressure and dynamic pressure load.It effectively controls the dynamic pressure of tunnel instability problems, and a repair tunnel success is realized.

Key words: Dynamic pressure tunnel, 3D shell structure, Shotcrete