That's why mojuk's idea is better. If enemy puts 10-20 C4 in one place, then only one will explode. If you don't want it to explode, then you throw your armed C4 near it and detonate it.
"in real world" ... yeah, I love when people want something in game just because there is something like that in real life, or "because realistic", or whatever. This is only a game, want some reality, shut down your PC and go out
Fallout was, is and will be far from reality.
You should be able to disarm land mine with traps skill. Grenades are too cheap.