Control mechanism and supporting technology of roadway in high stress fractured surrounding rock
In order to solve the problems of poor surrounding rock supporting and serious deformation damage in high stress fractured surrounding rock roadway,the deformation damage characteristics and control principle of high stress fractured surrounding rock roadway were studied by combining field investigation,theoretical analysis and field test with the background of No.37221-2 return air roadway in Dongxia Coal Mine.Based on the original supporting scheme and the analysis results,the joint supporting scheme of"grouting pipe shallow grouting+anchor rods+grouting anchor ropes+reinforcing mesh"was proposed.The results of field industrial test showed that the maximal displacement of the roof and floor and the maximal convergence of the two gangs were reduced by about 77％and 82％respectively compared with the original supporting scheme,and the integrity and stability of the surrounding rock were good.This study can provide reference and technical support for controlling the surrounding rock of high stress fractured surrounding rock roadways.
high stressfractured surrounding rockdeformation damagejoint supporting
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