The Influence Of Inner Mongolia Typical Mine Ground Collapse To Vegetation And Revegetation Mode Research

In this paper, according to regionality, typicality of subsidence area revegetation, and different mineral species, chosen Dayangshu coal mine, Xinxin coal mine, Bainaimiao copper, Tanyaokou pyrite for typical mine of Inner Mongolia. By analyzing the subsidence condition of the four mine, the vegetation growth condition, and experimenting the soil sample, studied the subsidence influence on the quantity of plant species, the subsidence influence on vegetation, the different revegetation mode influence on soil physical and chemical properties, the correlativity between the vegetation growth and soil physical and chemical properties, screening the suitable plant species and cofigurating the revegetation structure of subsidence area.The conclusions are drawn as follows:First, Dayangshu coal mine, Tanyaokou pyrite and Bainaimiao copper subsidence areas’vegetations are artificial restoration; the proportion of plant species, genus, and families’quantity to control area is more than 80 percent. Xinxin coal mine subsidence area’s vegetation is natural restoration; the proportion of plant species, genus, and families’quantity to control area is less than 23 percent. So, the vegetation recovery of artificial restoration is better than natural restoration in mine subsidence area.Second, arber-grass mode, herbage mode and field mode’s subsidence areas’ plant growth conditions are worse than control area, among them arber-grass mode is better than those two. So the collapse’s effect to the arber-grass mode’s plant is lower than those two. In the situation of different slop position, the growth condition of arber which on the middle of the slop worse than which on the top of the slop or which at the bottom of the slop.Third, arber-grass mode can make the soil of the subsidence area in the suitable looseness and tightness range, and improve the soil aeration. The content of organic matter in subsidence area is lower than control area, and the content of organic matter of arber-grass mode is more closer to the control area.Forth, Dayangshu coal mine subsidence area should plant Rosa davurica Pall., Populus davidiana Dode, Lespedeza bicolor Turcz., Artimisia mongolica (Fisch.ex Bess.) Nakai, Elymus sibiricus L. as dominant species to revegetation. Bainaimiao copper collapse is not stable, we should plant Stipa glareosa P. Smirn., Agropyron desertorum (Fisch.) Schult., Leymus chinensis(Trin.) Tzvei. as dominant species, when the collapse become stable can plant Populus simonii Carr., Juniperus rigida Sieb. et Zucc, and Caragana microphylla Lam.. Tanyaokou copper should plant Tamarix chinensis Lour.and Artemisia ordosiea Krasch. as dominant species to revegetation.