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Abstract Theoretical analysis，numerical simulation and experimental testing are used to study the velocity of consolidation wave in grouted rock bolt with different anchoring qualities. Fresh concrete with different ages is used to simulate different anchoring strengths in experimental testing. In the numerical simulation，various values of elastic modulus and Poisson ratio are used to simulate different anchoring qualities. Numerical simulation results agree with experimental results，both of which show that velocity of consolidation wave in grouted rock bolt are related to the anchoring strength of fresh concrete. At lower strength of fresh concrete，the velocity of consolidation wave decreases with the increase of strength；at higher strength，the velocity of consolidation wave increases with the increase of the strength. The essence of the phenomena is explained with numerical simulation，which shows that the changes are brought by the P wave and fluctuation of interfacial wave of the bolt and grouted medium.
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Received: 17 July 2008
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