That is stopping it for a short span of time so the rest of the SNs can get out of the way.
What I am gathering personally from this is
Kaido and BM attacked, Zoro blocked it saving enough time for the rest of SNs to get out of the way, followed by then Zoro getting injured afterwards, then we assume he is somehow resting and not fighting at the moment, somewhere towards the end of the chapter Zoro then cut's prometheus with an attack. So during that duration after the initail momentary block, he got enough energy to launch another attack shortly thereafter