Abstract: According to the types of rock burst in Changcun mine,the mechanical model of "Z" Shaped coal pillar is preliminary established based on the theory of elasticity,rock mechanics,material mechanics,etc.The major influence factors of "Z" shaped coal pillar induced rock burst include the mining depth,the development arrangement of roadway workface,roof and floor of rock structure,impact trend of surrounding coal and rock mass,etc.the evolution laws of horizontal stress and vertical stress of the 2113 mining face are simulated,then the stress distribution laws near the "Z" shaped coal pillar are analyzed in detail,which led to the cause and mechanism of "Z" shaped coal pillar induced rock burst.Finally,it proposes the working face layout of 21 mining area that effectively avoid the stress concentration of "Z" shaped coal pillar through the internal misaligned arrangement of working face of the lower slice.