The anti-arc overlying strata structure induced mechanism and control of isolated corner coal pillar working face
Abstract：In order to effectively control rock burst disaster due to the process of corner coal pillar recovery,it is available to use the theoretical analysis and numerical simulation to analyze the overburden structural characteristics and induced mechanism and control measures depending on characteristics of isolated coal pillar with trilateral gob.It shows that isolated corner coal pillar working face with trilateral gob has anti-arc overlying rock structure composed of ＂T＂ and ＂г＂ structure,which can make the coal pillar form an anti-arc high stress and elastic energy accumulation district around the working face;the main reason which induced rock burst is that the cyclical movement of ＂г＂ structure leads to the anti-arc overlying rock structure being in the dynamic process and the comprehensive role of the static and dynamic stress affect the steady state of the coal body in the process of recovery.This paper puts forward the non-symmetric control countermeasures weakening the implementation of relief along the coal side of roadway and strengthening support to narrow coal pillar side,to reduce the impact of anti-arc structure of overlying strata and control the impact of risk.
Keywords：corner coal pillar working faceisland typeanti-arc overlying strata structurerock burstnon-symmetric control
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 719-724 )