ABSTRACT
Experimental site were selected from reclamation soil filled with coal gangue of two typical coal mining subsidence areas in Huainan, China. To discuss mechanical stability aggregate, water stable aggregates size distribution and soil organic carbon content in different coversoil thickness. Results showed that the composition proportion of the mechanical stable aggregate was in shape of “W” with decreasing size fraction, the percentage of size fraction >3.2 mm accounted the largest proportion and existed significant difference from that of other size fraction (P < 0.05), the water stable aggregate is similar to the mechanical stable aggregate. Mean weight diameter of soil water stable aggregate, the content of total soil organic carbon and each size fraction of Water-stable aggregate and aggregate-associated C in ecological remediation areas were all less than that of the control area. The thickness of 60–80 cm would promotes soil aggregate formation, the accumulation and stability of organic carbon.
