Adopting of failure criteria is one of major factors that restrict the mechanism research of dynamic spalling. According to one-dimensional elastic-brittle plane wave theory and the cumulating damage failure criteria

spalling process under explosion or impact loading is investigated. The variation of the first spalling thickness is studied for analyzing triangular impulse loading considering rise time. The analysis result indicates that the spalling layer thickness considering rise time is less than that of without considering rise time; the spalling thickness calculated with cumulating damage failure criteria is larger than that with maximum tensile stress instant fracture criteria. The research findings are valuable in the study of the ground-shock-induced collapse of tunnel.