Ecological Restoration Effect Evaluation Of Dalian Limestone Mine Pit Slope

Study and evaluation of Dalian limestone mine pit slope ecological restoration effect, forDalian City in Liaoning province and the mine ecological rehabilitation technology to providethe scientific basis and experience for reference, to the mining area ecological, sustainableeconomic development has certain direct sense. Based on the research of domestic andforeign slope vegetation spraying technology research basis, in2010June~July (plants),October (plant growth period), two times on the Dalian limestone mine of thick layer basematerial spraying slope (2007-2009,2-4years), hydraulic spray sowing slope (2008-2009,2-3years) ecological restoration effect to carry on the system evaluation, and puts forward thereasonable plants configuration is proposed, draw the following conclusions.(1) In the plant growing period, made of thick layer base material spraying technologyand hydraulic spray-sowing technology to repair of mine slope ecological restoration effect isgood, the specific performance: a higher degree of vegetation coverage, species diversity islarger, community stability. Dominant species of main legumes (alfalfa, clover, and locustAmorpha fruticosa), grasses (tall fescue, ryegrass), while the native plants of Compositae--Artemisia, mulberry branch herbaceous vine Humulus invaded communities.(2) The life of the plant, through the thick layer base material spraying technology torepair the slope, plant species distribution is not uniform, and the slope communities did notappear already spraying plant species--white clover, seabuckthorn, Pinus thunbergii. Slopevegetation growth status and vegetation spraying and sowing time has a close relationshipwith. In June the construction of the plant community characteristic value is relatively high,and community gradient did not change significantly, but in August the construction of thicklayer base material spraying3annual plant community abundance, coverage, height isrelatively small.(3) In the plant growing period, the survey of thick layer base material spraying andhydraulic spray-sowing technology of slope soil with high organic matter content of2.1%~5.0%, total nitrogen content is0.125%~0.218%, were higher than that in soil. In2008hydraulic spray sowing slope and2009thick layer base material spraying slope plant rootamount high up to3.34kg/m3and2.36kg/m3, where in the coarse root, root and fibrous rootsof a certain percentage of each.(4) Plant growth period, two kinds of slope vegetation spraying technology to repair ofmine slope vegetation coverage is very high. In addition to thick layer base material spraying3years plant community coverage is92%, the rest are completely slope vegetation cover. (5) Dalian limestone mine pit slope greening is suitable for spraying irrigation, plant,main plant species have Amorpha fruticosa, Rosa multiflora, clover, alfalfa, clover, bluegrass,tall fescue, ryegrass, cosmos, wild chrysanthemum, Ipomoea purpurea, Humulus scandens.