Distribution Characteristics of Total Carbon and Organic Carbon in Sediments of Coal Mining Subsidence——Taking the XT Coal Mine as a Case Study
Coal mining activities can easily induce surface subsidence,and surface runoff converges to form sub-sidence lakes,which affects the content and distribution of Total Carbon(TC)and Total Organic Carbon(TOC)in the soil of the mining area.This paper compares the differences in different waters(shallow water areas and deep water areas)by measuring soil physical and chemical properties,total carbon,and total organic carbon content,and examines the spatial distribution of the two carbon components based on inverse distance weight interpola-tion.The results show that there is a significant difference in the bulk density of 0～5 cm sediment in the subsid-ence area,and there is no significant difference in the moisture content,pH and conductivity between the deep-water area and the shallow water area(P＜0.05).There is no significant difference between TC and TOC in the subsidence water area.There is a significant difference in the TC content of different sediment layers in the shal-low water area,but there is no significant difference in the TC content of different sediment layers in the deep-wa-ter area(P＜0.05).The 0～5 cm sediment has the highest TOC content,with the content ranging from 10.59±3.03 to 11.67±4.02 g/kg.Based on the inverse distance weighted interpolation diagram,it can be seen that the contents of TC and TOC have a positive correlation with depth.The TC content is high on the nearshore side,while the TOC content is higher in the depression at the bottom of the lake.
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