Treasure enchantment for helmets-Hardhat

The treasure enchantment would probably be called something like "Hardhat" or something like that. Basically, it would be like when you place a torch under falling gravel, but for your head. Say you're mining straight up or you break a block, only for tons of gravel to fall on your head, instead of suffocating, the blocks would simply be destroyed but it would not give you the block that was destroyed. (This is to prevent players from abusing it to quickly destroy heaps of gravel or sand) . (THIS WOULD ONLY WORK IF IT FELL ON YOUR HEAD, NOT IF YOU TELEPORTED INTO THE WALL OR JUMPED TO BUMP YOUR HEAD AGAINST IT)