Lower coal seam high-position filling mining method based on upper thin coal seam drilling type coal mining

The invention discloses a lower coal seam high-position filling mining method based on upper thin coal seam drilling type coal mining, relates to the technical field of filling mining, and is suitable for a close-range coal seam group with an upper coal seam being a thin coal seam. Green and efficient mining of a short-distance coal seam group is achieved mainly through cooperative operation of upper thin coal seam drilling, lower coal seam fully-mechanized mining and high-position filling. The method comprises the following steps that the high-position filling feasibility of the coal seam group is judged; arranging upper and lower coal seam working surfaces; the upper thin coal seam working face advances for the first time and high-position filling floral tubes are arranged; the lower coal seam working face is propelled and high-position filling is performed; the upper thin coal seam working face continues to advance, and high-position filling floral tubes are arranged; working surfaces of the upper and lowe