jd: I've never had that problem at level 70, but there the entrance is quite big, and you can jump quickly. Possible, maybe not too easy.
And yes, you can kick the "mines" all with one kick.
But your level 87 (I think you are talking about 77) is harder. If a kiwi starts camping in that level's entrance, there is nothing you can do - unless you can jump over it, which would require incredible skills

There you can only wait, and when the entrance is free, go there and leave the spot directly to avoid the detonations.