A Basic Research Of Cutand Fill Mining In Surface Subsidence And Strata Control

Our country is a coal as the main energy consumption of the energy powers,with the development of the coal mining technology and innovation andincrease of human demand for coal resources, coal production in China rosesharply. Combined with the coal utilization rate is low, many coal, coal belongto "three under" pressure makes many local coal resources in just a few decadesor even a few years soon dried up.In order to solve the problem of coal "three under" pressure coal, fillingmining gradually began to be used. Filling mining method is a new type ofgreen mining, to reduce the effect of surface subsidence and increase theutilization of coal is significant.Taking LuAn group licun mine’s geological data in the background, theinfluence of this ore mining subsidence mechanism has carried on theexploration; On the basis of the key strata theory in ground control, theapplication of relevant knowledge of mechanics of elasticity, will pack aftercoal mining working face roof simplified model for the elastic thin plate,through theoretical calculation of the limit span of roof to18m; Calculated thestress, strain and deformation of the cavern roof deflection, which can be judgedthrough the roof displacement monitoring, the change of the stress of the roof;Through analog simulation and numerical simulation technology to validate theconclusion of the theoretical calculation and supplement, thus to some extent forthe filling mining in mine engineering problems have certain guiding role.