The vertical sand silo is used to concentrate and settle all tailings, and the filling mass concentration is 66%-70%. The total capacity of the filling system is 540m³/h (four sets of systems, three uses and one standby).
Through the three-stage crushing process of "counterattack breaking + high-fine breaking + vertical shaft impact breaking", the coal gangue is prepared into the reasonable grading grouting material of -3mm.
The deep cone thickener (NGT16) was used to concentrate and settle all tailings pulp, the filling mass concentration was 70% ~ 72%, and the system filling capacity was 100m³/h.
After crushing and screening, coal gangue is used as the main filling aggregate, and fly ash and cement are added at the same time. The filling system capacity is 200m³/h, and the annual filling and mining capacity reaches 600,000 tons.
Zisheng coal mine uses gangue + cement + fly ash + water for paste backfill. Backfill system capacity 150m3 /h, conveying distance up to 2500 meters.
The filling station adopts HGBS160.15.710 type filling industrial pump produced by Feiyi Company. Using construction waste as the main filling material, the paste strip filling mining is completed.
