关键词: 铁尾矿, 采场风化土, 采场除尘灰, 理化特性, 土壤, 微生物多样性

Abstract: In order to explore the feasibility of iron tailings and other mine solid waste partially re⁃ placing soil for ecological restoration，the physical and chemical properties，nutritional components， heavy metal content and microbial population structure of iron tailings，stope weathered soil and stope dust removal ash are systematically analyzed.The results show that the solid waste such as iron tailings is not corrosive，and the iron oxides such as magnetite contained in it can slowly release trace elements such as iron and magnesium after activation，and improve the physical structure of the soil，which has potential soil improvement value. Although some nutritional indexes did not meet the standard，they could be im⁃ proved by compound supplementation，and the content of heavy metals could also meet the standard re⁃ quirements by blending.The microbial community structure and functional bacteria composition of the reme⁃ diation matrix are highly consistent with those of the original soil by mixing the nearby original soil with iron tailings for ecological restoration. Due to the low microbial diversity，the stope weathered soil and stope dust removal ash need to be limitedly mixed in the application.The soil reconstruction of iron tailings and other mine solid wastes is feasible，which can provide technical support and experimental basis for iron tailings and other mine solid wastes as ecological restoration substrates to replace part of the soil.

Key words: iron tailings, stope weathered soil, stope dust removal ash, physical and chemical proper? ties, soil, microbial diversity