Study on Influence of Fault Structure on Gob-side Roadway Surrounding Rock under Mining Conditions
In order to explore the coupling operation characteristics of mining stress and fault structure on gob-side roadway,the distribution law of vertical stress in stope and the deformation law of surrounding rock of gob-side roadway are investigated based on the Tucheng Mine and the similar simulation and simpli-fied test.By using numerical simulation method,the characteristics of fault slip and deformation of surround-ing rock under complex geological environment are analyzed.The results show that under the condition of fixed fault,the location of fault has no obvious influence on the stress distribution of stope and the displace-ment of roadway roof.The slip space of FD6 fault occurs gradually in coal seam mining,and the size of coal pillar is the key to prevent the slip of fault.The subsidence of overlying rock in goaf will lead to the slip of FD8 fault,and the subsidence amplitude should be limited.If necessary,the overlying rock in goaf can be supported by filling operation to prevent fault slip.Under the influence of fault slip,the floor of the roadway generally has the characteristics of large bulging,and under the influence of fault tangential stress,the roof of the surrounding rock of the roadway presents the characteristics of inclined deformation.The research re-sults can provide reference for mine safety prevention and control.
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