Abstract:In order to research the effect of faults on the stability of roadway wall rock, in this article, the return air laneways of 201 and 203 working faces of a certain mine are used as the engineering background, the FLAC3D digital simulation method is used to research the morphological distribution features and stress field distribution features of roadway wall rock plastic zone to reveal the law of strata behaviors of the return air laneways of 201 and 203 working faces under joint affect of mining and faults. The research result shows that the wall rock plastic zone where the roadway passes through the fault section has remarkable uneven distribution features, and failures occur in the shallow wall rock of roadway, with unloading phenomenon, and remarkable stress concentration zone is gradually formed in the deep wall rock; the failure morphology of wall rock plastic zone where the coal pillar passes through fault section is relatively uniform, and the distribution range of maximum principal stress of roadway wall rock seems to be symmetrically distributed. Aiming at the severe failure where the wall rock passes through fault section, the corresponding reinforced supporting solution is put forward based on the existing supporting method to effectively control the deformation of wall rock.
