Study on Influence of Width-height Ratio of Roadway with High Horizontal Stress on Surrounding Rock Deformation
In order to study the influence of width-height ratio of roadway with high horizontal stress on the deformation of surrounding rock,FLAC3D software was used to simulate the stress state,shear failure degree and displacement of surrounding rock with 42103 working face of a mine.The simulation results showed that under the action of high level stress,the larger the roadway width-height ratio,the smaller the stress concentration of the surrounding rock and the less tensile stress occurred,and the more reasonable the stress distribution of the surrounding rock.The concentration range of shear strain on the roof was small-er,the area with higher shear strain was mainly concentrated in the two top corners,and the area with high-er shear strain was relatively isolated,and the shear effect on the roof was low.The displacement of the roof was not sensitive to the change of the aspect ratio,while the displacement of the two gangs gradually decreas-es with the increase of the aspect ratio,and the reduction amplitude was relatively large.After the field ap-plication,the surrounding rock of the roadway has no obvious deformation and separation,and the stability is greatly enhanced.
underground mineroadway with high horizontal stresssurrounding rock deformationFLAC3Dnumerical simulation
NETL
NSTL
万方数据
