Studyon The Law Of Movement A Of Rock Strata Caused By Mining In The West Side Of Yanqianshan Iron Mountain

The method of mining from open pit to underground is a complex compound.With the advance of mining on the tip of the high and steep slope,which forming in the early stage of open-pit mining,the loose rock mass in the slop will be deformation secondly,thus result in the crack of the slope instability,surface subsidence.We analysis the mining process in the west tip of Yanqianshan mountain according to the field geological characteristics of the mining area and the similarity theory.Based on this background,we transform the slop to equivalent joint rock geological model,for studying the slope deformation and failure mechanism,and the internal phenomenon and regularity of strata movement and surface subsidence with large three-dimensional physical model test when the slop is in the mining process and has complex structure surface.Meanwhile,we simulate the numerical model combined with the continuum theory of discrete element model calculation to research the result of numerical simulation and model test and the scene of damage,thus we find the damage rule and mechanism of the slope.The main work of this thesis includes the following 4 parts:(1)According to the field geological characteristics of the mining area and the similarity theory,we establish the physical model of Yanqianshan western slop and determine the parameters for the geometric similarity.(2)We carry out the matching experiment of similar material required,based on the physical and mechanical parameters of similar scale of the slop,and analysis the sensitivity of the various components.(3)According to the actual working condition,we study the slope deformation and failure mechanism,and the internal phenomenon and regularity of strata movement and surface subsidence with large three-dimensional physical model test.And we use 3D laser scanning and digital photography to monitor the deformation.(4)Discussing the result of numerical simulation and model test and the scene of damage,thus we find the damage rule and mechanism of the slope.