Failure Mechanism and Countermeasures of Soft Rock Roadway in Kilometer Deep Shaft

Failure mechanism of typical high stress soft rock roadway in Yuncheng kilometer deep shaft is discussed and technical countermeasures of solving high stress soft rock roadway are proposed.The countermeasures,on the basis of yield,of preventing rock excessive deformation are proposed finally through using high prestressed,high strength bolt to fully mobilize rock bearing capacity at initial stage and using rigid supporting,backwall grouting to strengthen at late stage,which carries on a successful industrial practice.