煤矿塌陷区不同复垦方法及年限的土壤修复效果研究

以淮北煤矿塌陷区复垦地为基地，研究挖深垫浅造地、粉煤灰充填造地、煤矸石充填造地三种不同复垦方法的复垦地土壤随复垦时间的修复效果．研究表明：煤矿塌陷区进行土地复垦后，土壤化学性质逐渐恢复，复垦20年后．土壤化学性质已接近当地耕地．采取挖深垫浅复垦的耕地土壤化学性质恢复快，而粉煤灰充填和煤矸石充填复垦的耕地土壤化学性质恢复较慢，建议耕作时增加培肥，以加速土壤恢复．

A Study on Restoration Effect of Reclamation Land with Different Reclamation Methods and Years of Mine Subsided Area

The restoration effect of reclamation land that are made by digging soil at deep and padding it to shallow method, filled subsided area with coal fly ash method,and filled subsided area with gangue method during 10 years and 20 years was studied in Huaibei mine subsided area.The results were as follows:first,soil chemical characteristics were restored after reclamation of mine subsided area, and they were similar to farmland after 20 years reclamation; restoration of soil chemical characteristics in reclamation land by digging soil at deep and padding it to shallow method was faster than that in reclamation land by filled subsided area with coal fly ash method and filled subsided area with gangue method,and it was suggested that fertilizer can be supplied during cultivation in order to accelerating soil restoration.