Abstract: With the increase of mining depth in Sifang Gold Mine，the continuous use of non-pillar sublevel caving mining will face the problems of goaf safety and poor technical and economic indicators. In view of the occurrence conditions of deep ore bodies and the change of ground pressure，considering the technical and economic indicators，the safety conditions of surrounding rock and the occurrence conditions of ore bodies，the sublevel open stoping with subsequent filling mining method and the large diameter deep hole stage open stoping with subsequent filling mining method are compared. The depletion index of sublev⁃ el open stoping with subsequent filling method is better than the latter，and the mining safety is better un⁃ der the condition of unstable surrounding rock. Finally，the sublevel open stoping with subsequent filling mining method was adopted and industrial tests were carried out，and good results were achieved.

Key words: steeply-inclined thick ore-body, sublevel open stoping with subsequent filling mining method, technical and economic indexes