Issue with Explosive type block

Hi, I have a issue with a block that made for a Tnt related type, so I made a mine block (Custom) where when you step on it the mine will explode and when it does it I see the mine block dropped and on the ground and able to pick it up again, is there anyway how I can prevent that so when it explodes you can't get it back unless you craft it?

Note: I do have a crafting recipe for it.