Simulation study on influencing factors of deformation and failure of floor pumping roadway of soft surrounding rock
GAO Zhanfeng
LIU Ruijie
LIU Heng
Lü Hong
Abstract：The buried depth of the floor pumping roadway in the No.21 working face of Dazhong Mine is 600 m,and there are problems such as large deformation of the roadway and serious fracture of the anchor cable and anchor network.In view of the above problems,the stability of different roadway cross-section shapes by numerical simulation method was analyzed,and reasonable cross-section design of Dazhong Mine floor pumping roadway was carried out to determine the appropriate section shape of roadway.Through the analysis of the stress distribution of different roadway cross-sections and the plastic zone distribution of surrounding rock under this geological condi-tion,the roadway form was determined to be straight wall semi-circular arch.By analyzing the distribution of roadway plastic zone,verti-cal stress and displacement of surrounding rock under different ground stress and roadway properties,the influence of ground stress and roadway properties on roadway stability was determined,which can provide a basis for underground construction of coal mine.
Keywords：roadway cross-section formroadway plastic zoneroadway stabilitynumerical simulation
Publication Date：2024-10-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 82-90 )