黄河泥沙充填复垦覆土材料垂直一维入渗特性研究
发布时间：2019-06-19 18:51
【摘要】：针对采煤沉陷地充填黄河泥沙后覆土量不足的问题,提出利用当地表土、心土和黄河泥沙组配作为新覆土材料,研究了其垂直一维入渗特性。结果表明,随着黄河泥沙占比提高,新覆土材料初始入渗率、稳定入渗率在0.461 5~4.166 7 cm/min、0.032 9~0.327 3 cm/min范围内变化,分别与黄河泥沙占比呈显著性正相关、极显著性正相关;累积入渗量和湿润锋下移深度同样呈增加趋势,同一入渗时间下,水分得以快速进入土壤,减少了地表径流;并利用Kostiakov模型对入渗过程进行模拟,结果表明Kostiakov模型能很好地描述新覆土材料入渗过程。表土、心土和黄河泥沙3组配比分别为1∶1∶0.86、1∶1∶1.33、1∶1∶2的新覆土材料质地为壤土,入渗优于或接近常年耕种农田,具有一定的保水性。根据尽量增加黄河泥沙层上覆盖材料厚度的原则,选取配比1∶1∶2的新覆土材料作为黄河泥沙充填复垦采煤沉陷地的覆土材料。
[Abstract]:In order to solve the problem of insufficient amount of overlying soil after filling the sediment of the Yellow River in coal mining subsidence, the vertical one-dimensional infiltration characteristics are studied by using the combination of local topsoil, core soil and Yellow River mud and sand as new overlying soil materials. The results show that with the increase of sediment ratio in the Yellow River, the initial infiltration rate and the stable infiltration rate of the new overlying soil materials vary in the range of 0.461 脳 4.166 7 cm/min,0.032 9 鈮，
本文编号：2502568
[Abstract]:In order to solve the problem of insufficient amount of overlying soil after filling the sediment of the Yellow River in coal mining subsidence, the vertical one-dimensional infiltration characteristics are studied by using the combination of local topsoil, core soil and Yellow River mud and sand as new overlying soil materials. The results show that with the increase of sediment ratio in the Yellow River, the initial infiltration rate and the stable infiltration rate of the new overlying soil materials vary in the range of 0.461 脳 4.166 7 cm/min,0.032 9 鈮，
本文编号：2502568
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