Study of Stress, Displacement and Mining Influence on Protected Seam in Extraction of Gently-inclined Contiguous Upper Protective Seam
CHEN Yong
YANG Hongmin
Abstract：The variation characteristics of stress and displacement of the protected seam after the extraction of the contiguous protective seam was studied with numerical simulation according to the occurrence condition of the contiguous coal seams group in Zijiang Coal Mine and based on the mining effect of the contiguous upper protective seam. The results showed that the stress of floor coal-rock was in “V” distribution along the depth direction, the roof and floor displacement in the protected area of the protected seam was in “arch” distribution; when a 78 m-long coal face with buried depth of 420 m was mined, the roof displacement in the protected area of the protected seam was 15~57 mm and the floor displacement was 12~47 mm.
Keywords：contiguous upper protective seamprotected seamstressdisplacementnumerical simulation
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 1-3,8 )