The Study on Non-Destructive Test of Rock Bolt Bonding Integrity Through Method of Reflection Wave

Based on dynamics of grouted bolt system and reflection wave theory,vibration characteristic and reflection wave propagation theory in grouted system are studied,furthermore,the reflection wave method of non- destructive quality testing is proposed.By means of the experiment and theory analysis,valid length anchored, amplitude ratio,primary frequency,frequency ratio,dynamic stiffness of primary frequency are used in evaluating the state anchored and roughly assessing the anchoring force,therefore the reflection wave is a useful and valuable non- destructive testing method.