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Experimental study on stress wave attenuation and energy dissipation of sandstone under full deformation condition

  • Yun ChengEmail author
  • Zhanping SongEmail author
  • Jiefang Jin
  • Junbao Wang
  • Tong Wang
Original Paper
  • 16 Downloads

Abstract

Excavation behaviours not only destroy the balance of original stress in rock mass but lead to the redistribution of initial stress, resulting in rock mass in a new stress environment. The static stress in rock mass has the characteristics of dynamic change. For the purpose of investigating the effect of increasing static stress on attenuation mechanism and energy dissipation of stress wave in sandstone under the overall deformation condition, small disturbance experiments on sandstone bar are carried out with a modified split-Hopkinson pressure bar test system. The stress waveform, p wave velocity, temporal and spatial attenuation of amplitude, and energy dissipation are studied under various static stresses. Results show that stress waveforms at different locations are approximately the same, those at the same locations vary greatly, and the tensile waves that appeared at the tails of stress waves are larger with increasing static stress. With increasing static stress, p wave velocity experiences a dramatic increase, then develops gently, and finally a sharp decrease; the stress demarcation points are σs/σc = 30% and σs/σc = 55%, respectively. P wave velocity can be predicted by a quadratic equation when σs/σc > 63.69%. The relation between longitudinal wave velocity and static stress can be described by a quadratic function. Stress wave amplitudes decrease exponentially with increasing distance and time. Values of temporal spatial response intensity (RI) and spatial RI are approximately equal and present the same development tendency of nonlinear and linear stages due to the same dimensions. Values of temporal attenuation characteristic (AC) and spatial AC are differed by 2 or 3 orders of magnitude although they present the same development tendencies. Ratios of RI and AC can indicate the sensitivity of temporal and spatial attenuation to different static stresses. Full-wave energy declines in an exponential function with increasing static stress and decays as a logarithmic function with increasing distance. Widespread attenuation characteristics like these should provide a theoretical basis for rock mass stability analysis.

Keywords

Sandstone Stress wave P wave velocity Attenuation characteristics Energy dissipation 

Notes

Acknowledgements

The authors thank the National Natural Science Foundation of China and fund of housing urban and rural construction technology research and development project foundation of China. And we thank Liwen Bianji, Edanz Editing China (www.liwenbianji.cn/ac), for editing the English text of a draft of this manuscript.

Funding information

This study received support from the National Natural Science Foundation of China (Grant No. 51578447) and fund of housing urban and rural construction technology research and development project foundation of China (Grant No. 2017-K4-032).

Compliance with ethical standards

Competing interests

The authors declare that they have no competing interests.

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Copyright information

© Saudi Society for Geosciences 2019

Authors and Affiliations

  1. 1.School of Civil EngineeringXi’an University of Architecture and TechnologyXi’anChina
  2. 2.Shaanxi Key Laboratory of Geotechnical and Underground Space EngineeringXi’an University of Architecture and TechnologyXi’anChina
  3. 3.School of Architectural and Surveying EngineeringJiangxi University of Science and TechnologyGanzhouChina

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