A device to protect the floor pan of a land vehicle against mines, which device incorporates at least one layer of deformable reinforcements positioned between a plane front plate and a plane rear plate, the surface density of the front plate being greater than that of the reinforcements. A tread surface is provided with a waveform groove, an intermediate groove and a shoulder groove. The control assembly can also include a left control member and a right control member each coupled to the transmission. Disposed on an outside surface of this flat face plate is an adhesive opposite the open port connection of the jack. The photoinhibitor may be effective to generate a second reactant upon the absorption of at least one photon of the particular wavelength of light.