Research For The Impact On The Operation Of A Normal Road And Railway By The Mining Of Meng Jiagang Iron Mine

"Three underground mining" is one of core problems in underground mining.The stability of normal road and railway by the mining of Meng Jiagang iron mine is researched ih this paper.The following works are:The 3D digital model which describes the space ubiety among mine,highway and railway in accordance with geological cross-section and contour line of surf terrain.Based on the elastic-plastic theory and making use of mechanics software Comsol Multiphysics, plane and 3D mechanical model which describe the influence on the railway and highway by mining in Meng Nan mine region will be established. At the same time, subsidence,incline,curvature and plane deformation will be listed as control indexes to predict the deformation of the highway and railway. Based on stochastic medium theory, making use of ground surface deformation program(GSM), taking subsidence,incline,curvature and plane deformation as control indexes, ground surface results can be postprocessed with geological mapping software SURFER to get ground surface deformation results and 3D visualization contour map to predict the displacement and deformation of railway and highway. According to the analysis result,the deformation value is less than the specified value and the normal operation will not be influenced by mining.Combining with the predicting deformation value of normal road and railway, a monitoring program is worked out,which provides theoretical guidance to the safty mining.