Exploration and Practice on Blot Supporting and Fix-Pressure Mechanism for Soft Coal and Rock Roadways
GONG Liang-wei
ZOU De-jun
WANG Yi
Abstract：In order to solve the supporting problem of soft coal and rock roadways in Songzao Coal Min‐ing Area ,firstly ,anchorage mechanism of anchored bar in surrounding rock is discussed ,it is thought that radial anchorage force comes from a tight fit friction between the anchorage section and the bore‐hole wall ,and the calculation formula of tight fit friction is given.Secondly ,bolt supporting and fix-pressure mechanism is discussed ,it is thought that the reason of bolt supporting the roadways is the result of bolt fix-pressure action ,and some basic view points under bolt fix-pressure mechanism are brought forward. Finally ,bolt supporting principles are put forward ,i .e.“fixed firmly ,compressed firmly ,control early and coordinate deformation”. The new supporting theory has effectively solved the supporting problem of soft coal and rock roadways in Songzao Coal Mining Area .
Keywords：soft coal and and rock roadwaysbolt supportfix-pressure mechanismlong-term strength
Publication Date：2015-05-17
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 46-50,55 )