采煤塌陷干扰下风沙区土壤理化性质变化特征

发布时间：2018-04-30 06:51

本文选题：采煤塌陷 + 土壤理化性质　；参考：《环境科学与技术》2016年11期

【摘要】：为了探讨采煤塌陷对土壤理化性质的影响,该文以神府-东胜煤田的大柳塔矿区为研究对象,采用对比法系统分析了塌陷区和未塌陷区土壤理化性质的变化特征。结果表明:(1)采煤塌陷使土壤容重减小3.7%~27.5%,孔隙度增大13.3%~76.4%,土壤水分损失9.1%~15.8%(P0.05),土壤粘粒含量减少,土壤质地砂化。(2)塌陷对土壤全氮、有机质的影响较大,对全磷、全钾的影响较小。与对照区相比,0~60 cm土壤有机质流失1.9%~56.1%,0~10 cm土壤全氮含量下降29.1%~39.1%(P0.05)。(3)不同坡位处,坡顶和坡中的土壤容重、孔隙度和有机质受沉陷的影响最大,坡中土壤水分损失最多(P0.05)。随着塌陷年限的延长,土壤容重和孔隙度有恢复趋势,塌陷后土壤水分的恢复需要较长时间。
[Abstract]:In order to study the effect of coal mining collapse on soil physical and chemical properties, the authors take Daliuta mining area of Shenfu-Dongsheng coalfield as the research object, and systematically analyze the change characteristics of soil physical and chemical properties in subsidence area and unsubsided area by contrast method. The results showed that the bulk density of soil decreased by 3.727. 55.The porosity increased by 13. 3and 76. 4, soil water loss was 9. 1and 15. 8% P 0.05, soil clay content decreased, and soil texture sand. 2) collapse had a great effect on soil total nitrogen, organic matter, total phosphorus and potassium. Compared with the control area, the soil organic matter loss of 0 ~ (60 cm) and 10 cm ~ (10 cm) soil total nitrogen content decreased 29. 1% ~ 39. 1% (P 0. 05 ~ 5 ~ 3) the soil bulk density, porosity and organic matter in the top and slope were the most affected by the subsidence, and the soil moisture loss in the slope was the most significant (P 0. 05 ~ 0. 05). With the extension of collapsing years, soil bulk density and porosity tend to recover, and it takes a long time to recover soil moisture after collapse.
【作者单位】：中国环境科学研究院;
【基金】：中央级公益性科研院所基本科研业务专项:半干旱采煤塌陷区土壤养分循环过程及控制(2013-YSKY-14)
【分类号】：S153

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