Elastic Analysis on Roadway Roof Bed Separation Affected to Bolt Loading
Abstract：According to the bolt failure problems caused by the over large bed separation occurred by the deformation incoordination of the roadway roof strata, an elastic mechanics model of the bolt additional stress occurred by the roof bed separation was established. According to the bolt pulling load to the bolt function mechanism during the relative movement of the strata, the stress distribution mode of the an- chored mass under the roof bed separation function was obtained. The analysis found that under the condition of the same roof bed separa- tion location, the higher roof bed separation value, the higher the additional stress occurred from the bolt by the rood bed separation would be. Under the condition of the same roof bed separation value, the stress at the center of the bolt would be minimum, the additional stress occurred closed to the boundary roof bed separation would be higher and the axial force and shearing stress of the roof bed separation loca- tion and the anchored mass would be in a nonlinear relationship.
Keywords：roadway roofroof bed separation valueroof bed separation locationbolt stressedelastic analysis
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 33-36 )