Study of the cylindrical shell structural characteristic of the hard overlying strata of extra thick coal seam and its application
ZHANG Hongwei
FU Xing
YU Bin
HUO Bingjie
WANG Laigui
LIU Xiangfeng
ZHAO Na
Abstract：The fully mechanized top coal caving mining method was used to mine the extra thick 3-5# coal seam in Tongxin mine,and the failure and structure characteristics of hard overlying strata were studied based on the key strata theory.Using the elastic slab theory,mathematical models of cylindrical shell structure in the hard overlying strata were developed for the carboniferous extra thick coal seam with hard overlying strata in Datong mining area.The results show that some special weighting phenomena often occur in Panels 8105 and 8106 in Tongxin coal mine,including the large and small periodic weightings,large mining influenced area and rock bursts,and the cylindrical shell structure model of hard overlying strata can better confirm this mechanism.
Keywords：hard roofextra thick seamcylindrical shell structuremechanical model
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1226-1230 )