Anti-tank mines of all kinds are frequently used in many parts of the world, making protection of vehicles and their personnel a major prerequisite for participation in international peace supporting operations. In this report, different principles for the protection of vehicles against blast mines on the ground are discussed. Engineering aspects are not covered in this unclassified report. The governing principle when designing the mine protection is the survival of the personnel which for the physical protection of the bottom of the vehicle primarily means: preventing gases from the explosion from penetrating the floor of the vehicle, minimizing local blast effects on the floor like shock-waves, acceleration and deformation and minimizing the total impulse imparted to the vehicle. The design of the mine protection system depends on the type of vehicle to be protected and the threat mine to be protected against. In this report, three main protection principles are discussed: increasing the ground clearance, deflecting the pressure and absorbing the energy from the explosion.