Research On The Technology Of Ecological Reconstruction On Abandoned Mine Land

The development of mineral resources plays a very important role in China development of the national economy. But mineral resources development also brings serious environmental problems and induce increasingly frequent geologic disasters. Not only can the ecological rehabilitation in mined land realize the exploitation of mineral resources and ecological environment protection coordination development, but also they have important scientific value and practical significance.Taking the Malanzhuang Iron Mine of Capital Iron and Steel Co.'s dump and tailings as an example. The ecological rehabilitation techniques in mined land have been studied, the main research results are as follows:Geological environmental conditions and Landscape which around the dump and the tailings were surveyed. Dump identified, and the mine tailings may lead to environmental problems. Project Reclamation Program of dump and tailings was researched.Pinus tabulaeformis, Ralix typhina, Forsythia suspensa, Robinia pseudoacacia, Hippophae rhamnoides and Amorpha fruticosa were planted in the dump by the way of turning soil. During the trial period, the survival rate of various tree species, plant height, diameter, shoot growth of volume, the root pieces, crown width, the main root length were observed. The observation results of plants species showed that Ralix typhina, Forsythia suspensa, Robinia pseudoacacia, Hippophae rhamnoides, and Amorpha fruticosa were suitable for the condition of mined land Papermulberry, Castanea mollissima Blume, Tamarix ramosissma Ledeb, Tamarix elongata Ldb, Caryopteris clandonensis worcester Gold, Buddleja alternifoliage, L bicolor Turcz, L davurica(Laxm.)Schindl, L floribunda Bge, L inschanica (Maxim.) Schindl, Loliummul tiflorumLam were planted in the tailings by the way of not covering. During the trial period, the survival rate of various tree species, plant height, diameter, shoot growth of volume, the root pieces, crown width, the main root length were observed. The observation results of plants species showed that Astragalus adsurgens, Medicago sativa L, Loliummul tiflorumLam, Tamarix ramosissma Ledeb, Tamarix elongata Ldb, Buddleja alternifoliage, Caryopteris clandonensis worcester Gold, L bicolor Turcz, L floribunda Bge and Papermulberry are suitable for the condition of abandoned mine land. Hippophae rhamnoides and Amorpha fruticosa were planted in the surface of tailings slope by the way of turning soil. The observation results of plants species showed that the both plants are suitable for the condition of mined land.