Fully Mechanized Top-coal Caving:Underground Stress at Gateways Under Barrier Pillars of an Upper Coal Seamm
TU Shi-hao
WANG Fang-tian
DOU Feng-jin
YUAN Yong
LU Yan
Abstract：The stress distribution and regions of plastic deformation in working panel number 8902 were calculated with FLAC~(3D).Field geological data and gateway deformation were sur-veyed in the same working panel.The gateway deformation between roof and floor is 1985 mm and the deformation between the ribs is 1 877 mm.The cross-section of the gateways is less than 2 m~2,which seriously affects productivity.Support of the gateways may be achieved by rational layout of the stope drift of active workings and by decreasing the width of the barrier pillar between the working panels.
Keywords：barrier pillar between panelsfully mechanized top-coal caving mining methodre-taining gateways along goafmechanics of underground stress
Publication Date：2010-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1-5 )