Title: Legacy Coal Pillar Domino Instability Numerical Simulation of Room and Pillar Mining
Abstract:The room and pillar mining was used at 3-2 coal seam before Tanggonggou Coal Mine technological improvement.When the 4-2 upper coal seam is mining,the corresponding area of roof will be affected by 3-...The room and pillar mining was used at 3-2 coal seam before Tanggonggou Coal Mine technological improvement.When the 4-2 upper coal seam is mining,the corresponding area of roof will be affected by 3-2 coal seam goaf pillar and produces stress concentration,which is easy to cause rib spalling,roof fall,workface coal wall rib spalling in 4-2 upper coal seam roadway.According to UDEC numerical model,this paper studies the 3-2 goaf legacy pillar domino instability phenomenon with the advancing of 4-2 upper coal seam workface,analyzes and obtains the workface displacement change laws in 4-2 upper coal seam and the effect of different widths of coal pillar on domino instability phenomenon.Read More
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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