Analysis of the effect of combined support of rebar and FRP bolts in the roadway enclosure
In order to investigate the support effect of combined support of FRP bolts and rebar bolts in the roadway,a coal mine was taken as the engineering background,the engineering geological conditions and mining roadway layout of the mine were investigated and analyzed,and a combined support scheme of rebar and FRP bolts in the roadway periphery was proposed.Based on the different schemes,FLAC3D was applied to simulate and analyze the perimeter rock yield damage and perimeter rock displacement distribution under the three conditions of full rebar bolt support,rebar-FRP bolt combined support and full FRP bolts support.The results showed that:the use of FRP bolts instead of rebar bolts in the mining gang part of the roadway perimeter rock,and the use of FRP and rebar bolt combination support can maintain the stability of the roadway perimeter rock if the damage of FRP bolts does not occur.
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