| Boundary slope of open-pit get involved simultaneous in aspects of safety and economy.lt should satisfy economic demand not only consider slope self stability when desighing morphology.BaiYinHua No.1 opencast coal mine first-mining area north slope suffer from the influence on a series of maletic pour weak layer,existing greatly hidden trouble of landslide.Smiultaneous,economic stripping ration which was deterlined 103/t by design north realm does not satisfy market demand.Therefore,it has important practical significance to optimization slope shape from safety and economy two aspects.Further study on BaiYinHua slope stability,it's important for the realization on BaiYinHua No.1 open pit mine north wall unexploited and efficient mining.Thesis is analysis on slope engineering geological condition and potential landslide model to north slope stability,from of safety views of different slope morphology and parameters;Basis on open-cast mine stripping and coal price present situation determine the econolic stripping ration.combine with the results of slope stability analysis resultoptimal design north relam.By numerical simulation.the anew design slope stability of rerification reveal landslide mechanism.The results show that:BaiYinHua.No.1 open-pit mine first mining area north wall slope and slide model to be shearing circle for side boundary for weak story as bottom boundary fangent sheaf bedding slide;then the earth's surface state southward adjusi goes eighty 80?100m.whole slope angel decreases for 14°?17°;delineafion mining boundary simultaneous satisfy slope satsility and economically fair stripping ratio needs;rock mass dead weight causes weak atory occur shearing moudding yield is landslide mai origin.The research results have a guiding effect on the rational development plan of Baiyinhua No.1 open pit mine,and it is of reference value for the optimization of slope shape and realm of similar condition open pit. |
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