东部平原矿区三种复垦方式复田土壤理化性状对比分析

CONTRAST AND ANALYSIS ON THE PHYSICAL AND CHEMICAL PROPERTIES OF RECLAIMED SOIL OF THREE RECLAMATION WAYS IN EASTERN PLAIN MINING AREA

在我国东部平原矿区,煤矸石充填复垦、粉煤灰充填复垦和泥浆泵复垦等三种土地复垦方式得到了广泛的应用。通过对比、分析了三种复垦方式对土壤的理化性状及耕作效果的影响,结果表明:①不同复垦方式对土壤理化性状及耕作效果产生明显的差异;②泥浆泵复垦地力恢复周期长,而煤矸石复垦、粉煤灰复垦地力恢复周期相对较短;③泥浆泵复垦土壤耕性较差,但无污染风险;煤矸石、粉煤灰复垦土壤耕性较好,但存在一定污染风险。结论:在现有的经济技术条件下,煤矸石、粉煤灰充填复垦方式更适合在我国东部平原矿区应用;但需对复垦方式进行一定改良。

In the eastern plain mining area of our country, coal gangue filling reclamation way, fly ash filling reclamation way and mud pump reclamation way have been widely used. This article analyses the influence of these ways through contrast on the physical and chemical properties and farming effect of reclaimed soil, the result indicates： ①different reclamation ways offer quite different influence on the physical and chemical properties and farming effect;②the recovery cycle of land fertility of mud pump reclamation way is long, but the recovery cycle of coal gangue filling reclamation way and fly ash filling reclamation way is comparatively short; ③the soil cultivability of mud pump reclamation way is comparatively bad but the soil has no pollution risk; the cultivability of reclaimed soil filled with coal gangue or fly ash is comparatively good but the soil has certain pol-lution risk. The conclusion is that coal gangue filling reclamation way and fly ash filling reclamation way are more suitable to use in the eastern plain mining area of our country with the existing economic and technical condition, but the two ways need some improvement.