The ore rocks in the M1 structural alteration fracture zone of Songxian Shanjin Mining Co.,Ltd.are relatively fragmented and poorly stable,and the spatial position between the ore body and the fracture zone is interlaced,constituting the technical challenges of mining.In light of that,experimental research on a downward approach filling and mining method is carried out.The safety in the process of ore body extraction from tectonic alteration fragmentation zone is guaranteed by downward slicing approach stoping and roof-connecting filling under the artificial false roof.The panel is pided into 2 mining zones and 4 sections,the footwall outside-vein panel ramp-sectioned transport lane mining preparation are adopted,and the three hierarchical contact lanes are in staggered arrangement for each section;in the section,the stoping is carried out from top to bottom along the strike approach layer to layer.Stoping in each layer is operated under C tailings artificial false roof and the ore is drawn with scooptrams.The field application proves that the downward approach filling mining method ensures safety of ore body extraction,reduces labor intensity,improves working efficiency,obtains good technical and economic index:panel production capacity 180 t/d,mining loss rate 4.9 % and ore dilution rate 4.6 %.