Study And Application On The Surface-movement And Overlying Of Thick Coal Seam Caving Mining Under The Thick Conglomerate

The continuously increasing of mining range of coal mine, it would cause the mov ement and deformation of overlying rock or even the surface, and destroyed the enviro nment in mining area. Studying on overlying and surface movement and deformatio-n of fully-mechanized caving mining has important significance to the prediction and co ntrol of surface subsidence. Based on field measurement and site investigation, combin ed with the theoretical analysis, researched the laws and characters of overlying and su rface movement of 21132 coal seam caving face, predicted the surface movement and deformation with probability integral method; made a compared analysis with measure d data, and verified the accuracy of predicted results. With UDEC and FLAC3 D numer ical software,study the overlying and surface-movement of 21132 fully mechanized ca ving face, analysis the laws and characters of overlying and surface movement from th e respect from the vertical displacement and vertical stress separately and obtained the calculation formula for vertical displacement and secting graph for vertical stress with different height from roof.