Research On Rules Of Mining Ground Movement And Deformation With Large Mining Height In Han Jia Wan Coal Mine

Hanjiawan coal mine located in Shigetai Coal Mine of Shenfu mining area range, is atypical shallow seam, the average coal seam mining thickness is4.1m. The surface movementand deformation has its particularity in condition of shallow large cutting height workface,mainly to the surface crack failure features, the subsidence disaster on the surface buildingfacilities and ecological environment caused great harm, but at present for such conditions ofsurface movement and deformation laws study is still not enough. So the study of Hanjiawancoal mine mining surface movement and deformation law is great significance.Thesis of Hanjiawan coal mine2304working face mining as the research object, throughthe2304working face mining surface movement observation, combined with the mininggeological and mining conditions of observation data analysis, draw the relevant rockmovement parameters of Hanjiawan coal mine under the conditions of shallow coal seam withcutting height workface. On this foundation, combining underground working face minepressure observation results, application of rock beam fracture theory and UDEC discreteelement simulation, analysis on main roof and rock movement deformation and failure of themigration process of large cutting height workface, reveals the surface crack distribution andoverburden fracture structure evolution of internal relations, given the influence of goafsurface cracks form as well as the main factors of the formation of this special the crackdistribution mechanism, the final analysis of Hanjiawan coal mine large cutting heightworkface surface movement deformation and subsidence disaster characteristic.The results for Hanjiawan coal mine future" under three" mining and surface subsidencedisaster and basis. On the rational development and utilization of coal resources, miningsurface protection of buildings, ecological environment protection, to ensure the sustainabledevelopment of mining area economy has certain theory significance and the applicationvalue.