The extra kav of coals would spill onto the Courtyard floor and they would be swept into the Amah, the stream of water which ran through the Courtyard. The Kohen holding the golden shovel would enter the Sanctuary and pour the coals onto the Golden Altar, after which the incense would be spread over the coals. The rendered image below shows a typical fire shovel design of the type that may have been used for the incense shovel in the Temple.
|Example of an incense shovel of the type|
that may have been used in the Temple.