Abstract: Combining with the advantages of the traditional long wall caving method and conventional filling technology method, according to the specific mining condition of 1221 mining face of Xingdong mine, super-subcritial extraction and cave backfill grouting combined is proposed to control the surface subsidence.It provides theory and technology support for mining under building.Meanwhile, the mining sequence and effect of reducing subsidence were analysis.Results show that effect of reducing subsidence is obvious by using this method, and the sink rate is smaller than 0.2.

Key words: Filling mining, Cave backfill grouting, Deep mining, Surface subsidence