Hydraulic calculation of gravity pipeline transportation system of cemented coal gangue backfilling in Suncun Coal Mine, China

9th International Symposium on Mining with Backfill
Xin-min WANG,
Abstract Necessary capability of gravity pipeline transportation system of cemented coal gangue backfilling in Suncun Coal Mine, China, is about 74.4 m3•h-1 according to mining production and working times in the mine. It is estimated that working velocity and maximum pipe length-backfill depth ratio of the backfill system are 3.82m•s-1 and 5.4, and that probable backfill capability of the system is 110.18m3•h-1, respectively. Results of hydraulic calculation of the backfill system prove that designed backfill system is reliable in flowability and enough in backfill capability.
Keywords: hydraulic calculation, pipe length-backfill depth ratio, backfill capability, working velocity, flowability
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