FIELD: land reclamation. SUBSTANCE: invention is intended for reusing spent drilling muds, their detoxification, and their use as land- reclamating agents. Land-reclamating agent is prepared by adding humin-mineral concentrate containing humin acids to spent drilling mud so that agent contains 12-16% spent drilling mud, 6-7% concentrate, and liquid phase - the rest. Before addition of agent, soil is preliminarily loosened to the depth of root-inhabited layer. EFFECT: improved environmental condition and restored soil fertility. 8 cl, 7 tbl
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