Research on mutual function relationship between strata movement and hydraulic powered supports of fully mechanized longwall mining face in thin seam with close distance to each seam

Base on the back ground of the coal mining design for No.18 Up thin seam with a close distance to other seam in Luoling Mine and base on the summarization of the strata features and the mining historical conditions of the mine,with the similar simulation test,the paper analyzed the mine strata behavior features and strata movement law during the coal mining in No.18 Up seam.The paper researched the mutual function relationship between the hydraulic powered supports and the surrounding rocks and researched the roof breakings near the coal mining face after the initial pressurized period and periodical pressurized period.With the FLAC3D numerical simulation,the paper discussed the support pressure distribution laws of the roof and floor during the coal mining in the thin seam and proved the results of the similar material simulation test.