Similar simulation test on mining of rockburst danger and easy outburst coal seam under deep residual area
Abstract：For the safety problem on mining underlying coal seam workface of deep residual area,similar simulation test was adopted to analyze the rule of the stress variation by monitoring coal stress in the formation process and stable state of residual area.Stress-relief angles and protection scope on the dip and strike were ascertained based on the protection rule of stress-relief.The result shows that the overlying strata movement experienced twice instantaneous instability in large and five stages such as ＂normal—severe—ease—severe—normal＂ during the mining process of underlying coal seam workface.And transportation lane is in the high stress concentration region.There are two dangerous areas on the strike direction of workface.The scope of two dangerous areas was delimited combined with stress observation data.Simulation results also provide valuable primary data for formulating prevention measures of rock burst or coal and gas outburst in deep residual area.
Keywords：deep miningresidual areasimilar simulationunderlying coal seamdangerous area
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：7( 578-584 )