Abstract
This experimental study proposes a Split Shear Plates model to investigate the effects of a filled joint on S-wave attenuation. A dynamic impact is used to create frictional slip and generate an incident S-wave. The filled joint is simulated using a sand layer between two rock plates. Normal stress is applied to the filled joint, and semiconductor strain gauges are arranged on the two plates to measure the strain. Verification tests are conducted to validate the reliability of the experimental results. A series of tests is performed to investigate the influence of the normal stress, filled thickness and particle size of the filling materials on the S-wave propagation. The transmission coefficients of the filled joints are smaller than those of the non-filled joints because of the attenuation associated with the filling materials. Additionally, the transmission coefficients exhibit a stronger correlation with the normal stress than with the filled thickness or particle size. The transmission coefficients increase at a decreasing rate as normal pressure increases.
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Acknowledgements
The authors acknowledge the anonymous reviewers and the editor for their valuable comments and suggestions. This paper has received financial support from the National Natural Science Foundation of China (Grant Nos. 41525009, 51609183) and the Open Research Fund of the State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences (Grant No. Z015005).
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Liu, T., Li, J., Li, H. et al. Experimental Study of S-wave Propagation Through a Filled Rock Joint. Rock Mech Rock Eng 50, 2645–2657 (2017). https://doi.org/10.1007/s00603-017-1250-y
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DOI: https://doi.org/10.1007/s00603-017-1250-y