In some technical systems there used integrated units containing layers with different physical-mechanical properties. The layers made of explosive materials may be among these layers. Conditions of usage of such systems presume that one layer (a plate) should be thrown away from the system but the residuary part of the layered system should not loss its integrity. One way to perform a task is to insert additional protective layers between the layer of explosive material and residuary part of the layered system. We consider systems manufactured by layers of isotropic materials, functionally gradient materials, and porous materials with a layer of an explosive material inserted between these layers. We study how gradients of physical-mechanical properties and a degree of porosity result in decreasing the stresses in a compound barrier, in decreasing the velocity of its back surface, and in ensuring the prescribed velocity of a thrown plate.