Research on Stress and Deformation Laws of Surrounding Rock in Dynamic Pressure Tunnels
Taking the 9106 return air duct of Gaizhou Coal Mine as the research object,the influence of mining construction on the deformation of surrounding rock of the roadway at different stages was analyzed and studied using FLAC3D numerical modeling method.The analysis results show that during the excavation of this roadway and the top return airway,stress concentration occurs in the surrounding rock of the roadway,but it has little effect on the deformation of the surrounding rock.The concentrated destructive effect generated during the mining of the adjacent 9105 working face is the main reason for the vertical stress concentration and lateral support pressure increase of the 9106 return airway coal pillar,which has a significant impact on the deformation of the roadway surrounding rock.
dynamic pressure roadwaysurrounding rock deformationnumerical simulationapplication analysis
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