Might be "somename" is correct, but for me it feels just wrong to unplug a hot miner knowing that the hot air from the chips gets more or less stuck in the miner for a much longer time when the air cirulation stops.
Like the lamp of a video projector, which keeps fans running for a while after turning it off. It makes sense, but also could be trouble if the equipment is in winter.
Another simpler alternative is to just unplug the network cable, wait what you like to wait for a "cooldown" and then the power. After all, no connection, nothing to work with...