Effects of filling fluid type and composition and joint orientation on acoustic wave propagation across individual fluid-filled rock joints

Hui Yang, Huan feng Duan, Jianbo Zhu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Wave propagation and attenuation in subsurface rock masses could be highly affected by rock joints filled with fluids. However, the understanding of acoustic behaviours across fluid-filled rock joints is still at its infancy. To determine the effects of the type and composition of filling fluids as well as joint orientation on compressional wave propagation and attenuation across individual fluid-filled rock joints, extensive laboratory acoustic tests were conducted in this paper. Results showed that the existence of water in fluid-filled rock joints results in higher wave velocity, more wave transmission and less wave attenuation compared to light oils. In most circumstances, increasing liquid content in a single-liquid filled joint enhances wave velocity and wave transmission. For dual-liquid filled joints, both wave velocity and wave transmission increase with increasing water content. Joint orientation significantly affects wave characteristics of rock joints partially filled with liquids while it has slight influences on wave attributes of rock joints fully filled with liquids. In addition, wave velocity and attenuation across fluid-filled rock joints increases with increasing central frequency of incident compressional waves.

Original languageEnglish
Article number104248
JournalInternational Journal of Rock Mechanics and Mining Sciences
Volume128
DOIs
Publication statusPublished - Apr 2020

Keywords

  • Fluid
  • Joint orientation
  • Rock joint
  • Wave propagation

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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