Numerical Simulation Of Three Zones Of Metal Mine

Movement and failure of gob overburden and regularity of surface movement have conducted years of research at home and abroad, made great progress and obtain many results, but mainly concentrated in coal industry. Utility theory of movement and failure of gob overburden and three zones of metal mine have not yet been established.In this paper, author use FLAC3D to solve each unit of elastic-plastic and diagram of displacement contour by mining mechanics model. Obtain the data of three zones and surface movement by analysying of different mining methods, different overburden lithology, different ore bodies dip of underground metal mine, analysis of the influencing factors, obtain the regression equation lastly. According to the results of this paper, obtain the following conclusions:with the exploitation of open stope method, because of goaf overburden lithology is relatively hard and the presence of the pillar, generally does not appear tensile failure and caving; With the exploitation of caving mining, the goaf overburden appear archs fracture zone, the fracture zone is affected largely by height of the stope and rock mechanical properties; With the exploitation of caving mining, the movement and failure of overlying rock will lead to surface movement, the date of surface movement is affected largely by height of the stope and rock mechanical properties; In this paper, regression equation of surface movement is morely in line with engineering examples, it can be used to predict the surface movement of underground metal mine.