Abstract:

In order to verify the improved situation, the experiment determined the soil physicochemical properties of undisturbed region, restored region and destroyed region of MTG (Mentougou) abandoned coal mine in Beijing. The mathematical statistical analysis displayed the significant difference of 11 soil physiochemical properties; there were extremely significant differences of soil physicochemical effect between restored region and undisturbed region, destroyed region; and also found the soil remediation limit factor with single factor hypothesis test. The experiment confirmed that it was unable to complete the restoration only with the help of natural force; the comprehensive effect analysis proved that the physicochemical property of soil combined effect was obviously improved. The single factor hypothesis test proved that it was the soil organic matter, alkali-hydrolyzed nitrogen, available potassium and total nitrogen that were the key recovery target in the future.