i'd tag it `landuse=quarry` and <strike>`disused=yes`</strike> `disused:landuse=yes`, `disused:landuse=quarry`, like this one http://www.openstreetmap.org/browse/way/37434127 .
i'd tag it `landuse=quarry` and `disused=yes`, <strike>`disused=yes`</strike> `disused:landuse=yes`, like this one http://www.openstreetmap.org/browse/way/37434127 .