Evolution Mechanism and Characteristic Analysis of Bearing Layer in Roadway Surrounding Rock
In response to the serious fragmentation phenomenon of the surrounding rock during the excavation of the belt roadway in the second mining area of Niushan Coal Mine,which leads to low excavation efficiency and difficult support,Niushan Coal Mine analyzed and studied the bearing structure,evolution mechanism,and evolution characteristics of the deep surrounding rock of the roadway through technical research,theoretical analysis,and numerical simulation methods,and reasonably obtained the stress field,displacement field distribution,and plastic failure zone range of the surrounding rock in the failure zone.The research results indicate that the residual strength of surrounding rock is inversely proportional to the thickness of the bearing layer,that is,the greater the residual strength,the smaller the thickness of the bearing layer.The thickness of the bearing layer is directly proportional to the displacement of the surrounding rock.
fractured surrounding rockthe thickness of the bearing layerstress distribution of surrounding rocknumerical simulationanalysis and research
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