The experimental study was conducted in a flat-dipping medium thick orebody in Yuershan gold mine. Direct roof of the orebody consists of fault gouge and breccia, and is exceedingly easy to cave. In the experiment a new scheme of slice waste consolidated mining system i.v, used. For the first time, unclassified development waste is used as inert aggregate for consolidated filling material along with a simple and effective direct mixing technology. The result is satisfactory, average production capicity in stope is 70 t/day, ore loss rate in ore block is 5.6%, and ore dilution rate is 8.26%. Direct cost of mining and filling is only 20.86 Yuan/t(ore).