Mechanical mechanism of bolted structure forming in strong fissured surrounding rock
Abstract：Simplified roof bolted structure as a built-in beam acted by uniformly distributed load,the relationship between roof bolt pretension force and some factors was determined by analyzing the balance of the built-in beam,the pretension force was needed by roof bolted structure forming and the above factors include roadway roof pressure,physical property or mechanical property parameters of roof rock,effective length of bolt and bolt separation.Regarded side bolted structure as a body supporting roof bolted structure,the relationship between side bolt pretension force and some factors was determined by analyzing the relationship between confining stress and supporting ability of the supporting body,the side bolt pretension force was needed by side bolted structure forming and the factors above include roadway roof pressure,mechanical parameters of side rock,effective length of side bolt and the side bolt separation.The conclusion obtained was used when roadway support system was designed in No.15 seam of Datong mining area and achieved good result.
Keywords：strong fissured surrounding rockbolted structuremechanical mechanismboltpretension force
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)