IIRC mines wouldn’t be triggered if it was yours and you interacted with them in some way. But because the way Goldeneye handled objects like the ammo crate, anything that was considered “a part of it”, such as the mine, disappeared so a new one could spawn. The overall game code knew the mine was still there so if another player grabbed the ammo crate, thus interacted with the mine, it would detonate and kill the other player.