Research on top coal movement law of strike long wall fully-mechanized caving face in steep-inclined thick coal seams
LYU Wei-wei
KONG Zheng
Abstract：Through similar material simulation experiments and FLAC numerical simulations,the transport law of top coal in strike long wall fully-mechanized caving mining of steep-inclined thick coal seams in Baojishan Coal Mine was studied.By analyzing the character-istics of top coal transport and principal stress distribution,it is shown that the loose drawing body is still an approximate ellipsoid at dif-ferent angles,and the axis is not offset in the direction of coal seam inclination.The angle of the working face has a significant impact on the development height and shape of the drawing body,and also affects the high-level top coal release.The study has guiding signifi-cance for optimizing the parameters of the coal drawing process in the No.704 working face.
Keywords：steep-inclined thick coal seamstrike long wallsimilarity simulationdrawing bodytransport law
Publication Date：2023-12-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 64-68,76 )