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Feny Industrial Park, Chuangye Avenue, National Economic and Technological Development Zone, Ningxiang City, Hunan Province
The project involves a thorough study of the characteristics of mined-out areas in the Shangwan and Bulianta coal mines. It employs a series of processes including crushing, ball milling,slurry preparation, paste preparation, intelligent sorting of gangue,and intelligent control..
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.
The deep cone thickener (NGT22) was used to concentrate and settle all tailings pulp, the filling mass concentration was 66%-70%, and the system filling capacity was 150m³/h.
Zisheng coal mine uses gangue + cement + fly ash + water for paste backfill. Backfill system capacity 150m3 /h, conveying distance up to 2500 meters.
Using full tailings and waste rock as filling aggregates, the filling slurry concentration is 77% to 79%, with a 28-day strength greater than 5 MPa. The capacity of a single system is 100 m³/h, with an annual filling volume exceeding 500,000 m³.
Using the coal gangue paste backfill process, the system innovatively employs a dual-pump merging technique, with a backfill system capacity of 160 m³/h.
The filling system capacity is 160m³/h by using the coal gangue paste filling process and the innovative combined flow process with double pumps.
The designed filling and mining capacity is 1.2 million t/a, the coal gangue paste filling process is adopted, and the system capacity is 460m³/h.The design backfill mining capacity is 1.2 million tons per year, using the coal gangue paste backfill process, with a system capacit..
Coal gangue is used as the main backfill aggregate after crushing,and is mixed with fly ash,cement,and additives.The backfill system has a capacity of 250 m³/h,with an annual backfill volume reaching 1.2 million tons.Project results:the first paste filling system in China to rea..
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