COMPOSITE MATERIAL FOR BACKFILLING OF MINED-OUT SPACE Russian patent published in 2015 - IPC C04B18/00 C04B28/04 

FIELD: mining.

SUBSTANCE: composite material for backfilling of the mined-out space, comprising cement, the plasticising agent, fine-grained filler - waste of enrichment of wet magnetic separation of ferruginous quartzites and water, differing in that it in addition contains chrysotile asbestos - chrysotile, at the following ratio of components, wt %: cement - 12.8%; waste of enrichment of wet magnetic separation of ferruterous quartzites - 62.86; supersoftener Poliplast SP-1 - 0.226; chrysotile asbestos - chrysotile - 0.422%; water - the rest.

EFFECT: increase of strength of backfilling composite material.

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