Research on technology of anchor cable supporting and grouting reinforcement for dynamic pressurized tunnel with crushed surrounding rock

in order to soive the problem of govenance for dynamic pressurized tunel with crushed surounding rock,the deformation and faiure mechanism of thetunel was revealed by using numerical calculaion softwere of UDEC,and the conrol countermeasures were put forward. The supporting reinfocement scheme basedon anchor cable and grouting was put forward.then fied appication and effect monioring wereinplemened.Numeical caleulation and monioring resuitshowed thatthe deformation and fallre of tunel was a procss of gradual development.the falure oflocal key parts cause instability ofthe other paris of tunmel and the conrol fsides played a key role in the stability of tunme it should be the focus of supporing reinforcement. After the supporting reinforcement scheme wa implemenmed,theforce of suporting system wasin a good condion during the mining.cable force was at a beter lvel and the deformation of tunel ecreased obwiously.the maximum detormation of oof and sides was 75 mm and 309 mm. which decreased by 53.1% and 68.5%.nd the maximu deformation ofor was 28 m,which decreased by 665%.The supporting reinforcement technolagy based on anchor cable and grouting could guarane thelong-tern stabiliy of the tunmel.and couid ensure thesae podu:tion of the coal mine.