Deformation and stress distribution evolution of surrounding rock during the roadway excavation in Jiaojia Gold Mine
To solve the problem of serious deformation and difficult support of the roadway under deep high stress,the research centers on the-710 m horizontal roadway in Jiaojia Gold Mine,establishes Flac3D numerical model to simulate and analyze the disturbance response law of the surrounding rock during the roadway excavation process.The results show that due to the mining disturbance of the roadway,the stress around the roadway is released.Thus,the stress is redistributed,with the stress around the roadway concentrated,and the stress peaks mainly occurring in the roof,the arch shoulder,and the upper and lower sides of the side walls,so the support should be strengthened in the roof,the arch shoulder,and the upper and lower sides of the side walls;within a range twice the width of the road-way is the focus area for support;after excavation,surrounding rock mass will experience shear and tensile failure.By analyzing the evolution of deformation and stress distribution in the roadway,the process of deformation failure of sur-rounding rock during excavation is revealed,providing a scientific basis for support parameter design and support tim-ing.
deep mininghigh stresssurrounding rock deformationstress distributionroadway excavation
NETL
NSTL
万方数据
