The behavior of the interaction between a shock wave and a gas suspension layer with curved boundaries has been studied using the hybrid large-particle method, the wave running over the layer. The conducted research made it possible to reveal two-dimensional effects of double refraction (von Neumann effects), focusing or divergence of the refracted shock wave, and baroclinic instability at the gas-suspension interface with the formation of mushroom-shaped or ring-shaped vortex structures. The features of the flow nonequilibrium were brought out. These features were associated with a decrease in the intensity of the passing shock wave and the splitting of the initial separation of the media into two contact discontinuities: a jump in porosity and a contact discontinuity in the gas phase.