Abstract:In view of the technical problems of mining unstable and gently inclined thin to medium thick ore body, through the investigation of mining methods of this kind of ore body, the upward drift filling mining method is determined.In this method, the second stage approach is adopted to connect the roof with the top pressure in layers and to expand the pressure in the later stage of the pilot tunnel, and the geotextile steel skeleton flexible permeable filling retaining wall is adopted.Through industrial test, the dilution rate of upward drift filling mining method is ≤4.3%, the mining loss rate is ≤3.7%, and the drift production capacity is ≥ 105t/ d. Good technical and economic indexes have been obtained, which can solve the mining problem of unstable, gently inclined, thin to medium thick ore body with complex occurrence.