Stabilization of Rock Roadway under Obliquely Straddle Working Face

A floor rock roadway under an oblique straddle working face is a typical dynamic pressure roadway. Under the complex disturbance of excavation engineering works, often undergoes stress concentration and severe deformation damage. To solve problem surrounding stability control for this type, study considered East Forth main transport in strata 1762(3) Pansan coal mine. In situ ground monitoring numerical simulation calculation using FLAC2D software were carried out. The influence laws lithology, vertical horizontal distance between overlying face, positional relationship support form strength obtained. Within range mining influence, properties roof very different, two sides exhibited regional difference. on was approximately 30–40 m, that 50–60 m. side large, but below small. Using FLAC2D, displacement characteristics obliquely compared analyzed when bolt support, combined shed bolt–shotcreting–grouting adopted, proposed scheme bolting shotcreting successfully applied. satisfactorily controlled, results useful as reference similar maintenance projects.