Research and Application on Fracture Mechanism of Soft Rock Roadway in Longkou Mining Area

There are partial roof caving and broken roof and floor in 1101 material roadway of Longkou material roadway. To explore the lithological characters of roadway roof and floor, we carry on the conventional triaxial and short-term creep tests to roof and floor rock of roadway; to explore the best way of support, we calculate the roadway displacement vector characteristics, stress characteristics and plastic zone under different support modes by FLAC^3D, select the best support scheme and use it in filed. The results showed that with the increasing of confining pressure, the yield strength of oil shale and creep coefficient increased nonlinearly; the convergence rate and displacement of roadway reduced and rock stability enhanced. Roadway roof fracture has been controlled.