Numerical simulation study on therational width of section pillar in shallowly buried and large mining height working -face
ZHAO Ze-long
ZHANG Lei
Abstract：The vertical stress,failure patterns and deformation of roadway surrounding rock under different coal pillar width was in -depth studied by using FLAC3D numerical simulation software.The results of analy-sis were that:with the increase of the width of coal pillar,pillar stress concentration range and stress concen-tration factor were more and more small,gradually showed uniform bearing phenomenon,at the same time, displacement of surrounding rock roadway,the amount of plastic zone of pillar,roadway surrounding rock plas-tic zone were gradually decrease.With the increase of the coal pillar width of coal pillar,the range of elastic core was larger,the more stable the roadway coal pillar,more safety,taking into account the coal pillar width would result in the waste of resources,and ultimately determined the reasonable section coal pillar size was be-tween 14 ~16 m.
Keywords：shallowly buriedlarge mining heightsection pillarrational width of pillarnumerical modeling
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：6( 46-51 )