Reinforcement technology of pre-stressed whole grouting anchor cable in roadways with strong dynamic pressure

The headentry of the E.4^th panel in Sihe coal mine is located in the roadways concentration area,which suffers several times affections of dynamic pressure during the service period,and is hard to maintain the stability.The original support could not guarantee the safe use of the roadway.Based on the understanding of strata basic forms of the roof,floor and ribs using geomechanical tests and borehole peering method,established the supplement reinforcement technology of pre-stressed whole grouting anchor cable.Comprehensive monitoring data in roadways show that supplement reinforcement with pre-stressed whole grouting anchor cable can keep the integrity and stability of roadways,and effective control the roadway deformation.