RECULTIVATION METHOD OF OPEN PITS USING INDUSTRIAL WASTES

摘要

FIELD: mining.;SUBSTANCE: separate excavation of soil layer and overburden rocks, their movement and stocking into individual strip dumps is performed; open-pit field development, laying and levelling of overburden rocks and their compaction is performed to form an impervious screen. Then, backfill material is added, which consists of a mixture of overburden rocks and non-organic wastes - dust of electrostatic precipitators from cement production and citrogypsum from production of citric acid in the following ratio (wt %): overburden rocks : dust of electrostatic precipitators from cement production : citrogypsum = 2 : (1 - 1.5): (0.2 - 0.3).;EFFECT: reduction of adverse effect on the environment owing to avoiding open-area storage of wastes, and production of citric acid, and their use as part of backfill material during recultivation of open pits.;1 tbl, 1 dwg