煤矿塌陷区废碴充填复垦土壤理化性质研究

煤矿区充填复垦重构土壤在很大程度上改变了原生表层土体的构型,为了进一步了解粉煤灰、煤矸石充填复垦对土壤理化性质的影响,通过选取粉煤灰、煤矸石复垦土壤样品与对照土壤样品进行了实验研究,结果表明复垦土壤的理化性质较差。复垦土壤pH值呈碱性,土壤有机质含量降低,土壤全氮、速效磷、速效钾含量减少,土壤湿水分较为充足,风干水分分明显减少。

Study on the Physical and Chemical Properties of Reclaimed Soil Filled with Waste Residue in Mine Subsidence Area

The soil restructured by filling reclamation can greatly change the profile texture structure of original surface soil in coal mining area.The tests on soil samples took from the restructured soil by filling with fly ash or gangue and the original soil samples took from contrast area were carried out to reveal the influences of fly ash and gangue on the physical and chemical properties of reclaimed soil.The results showed that the physical and chemical properties of reclaimed soil are poorer,and the reclaimed soil is alkaline,the content of its organic matters,total nitrogen,available phosphorus and available kalium are lower than original surface soil,the moisture content of reclaimed soil is higher but the air-dried water is very low.