论文部分内容阅读
对毛乌素沙地南缘补连塔矿采煤沉陷后风沙土理化性质的变化进行了研究。与对照区相比,沉陷2a间沉陷区土壤含水量普遍显著减小(p<0·05),而在沉陷2a后,沉陷区的地表沉陷边界处风沙土孔隙度显著增大(p<0·05),而容重、硬度显著减小(p<0·05),沉陷区局部地表开裂地段全氮、全磷含量显著减小(p<0·05),全钾与有机质含量无显著变化(p>0·05)。通过主成分分析得到研究区样地前2个主成分值的散点图,用以反映沉陷后风沙土理化性质的综合变异性,对采煤沉陷后土壤质量评价进行了探索。
The change of physico-chemical properties of wind-blown sand soil after mining subsidence in the Bu-Linta Mine on the southern margin of the Mu Us Desert was studied. Compared with the control area, the soil water content in the subsidence area of the subsidence area was generally significantly reduced (p <0 · 05), while the porosity of the sandy soil surface in the subsidence area significantly increased after the subsidence area 2a (p <0 · 0.05), while the bulk density and hardness decreased significantly (p <0 · 05). The content of total nitrogen and total phosphorus decreased significantly (p <0 · 05), and the content of total potassium and organic matter had no significant change (p> 0.05). Through the principal component analysis, the scatterplot of the two principal component values of the sample area in the study area is obtained to reflect the comprehensive variability of the physical and chemical properties of the sandstone after the subsidence, and the soil quality evaluation after the coal mining subsidence is explored.