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Multi-scale effect of acoustic emission characteristics of 3D rock damage

  • Wan-rong Liu
  • Jian-kang LiuEmail author
  • Chun Zhu
Original Paper
  • 42 Downloads

Abstract

Scale effect and acoustic emission characteristics of rock damage are two important topics in rock engineering research. In this paper, considering different rock scales and establishing the 3D numerical rock models by means of PFC software platform firstly, the mechanical properties and acoustic emission characteristics were studied. Finally, based on the acoustic emission, characteristic discussed the damage evolution law of the rock models. The research result shows that the multi-scale mainly affects the peak strength, peak strain, and elastic modulus of the mechanic properties, affects the maximum acoustic emission event number, strain range of serious acoustic emission events of the acoustic emission characteristics, affects the damage rapid increase and damage failure stages of the damage evolution process. The stress-strain curves, acoustic emission events curves, and damage variable curves can be divided into three stages and different scales have different effect on these stages.

Keywords

Rock Multi-scale PFC Mechanical properties Acoustic emission Damage 

Notes

Funding information

The research described in this paper was financially supported by the Liaocheng University Research Fund (NO.318051703).

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Copyright information

© Saudi Society for Geosciences 2019

Authors and Affiliations

  1. 1.Liaocheng UniversityLiaochengChina
  2. 2.State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and TechnologyShandong University of Science and TechnologyQingdaoChina
  3. 3.School of EngineeringNagasaki UniversityNagasakiJapan
  4. 4.College of Construction EngineeringJilin UniversityChangchunChina

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