首页|Directional independence of the Kaiser effect of sandstone with high diameter–thickness ratios

Directional independence of the Kaiser effect of sandstone with high diameter–thickness ratios

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  • NSTL
  • Elsevier
? 2022 Elsevier LtdThe Kaiser effect(KE) was investigated considering strain energy density factor theory in fracture mechanics and the formation mechanism of the independence of effect direction. The results were as follows: Felicity ratio (FR) increased with increasing rotation angle, indicating that the memory of the original rock stress was affected by the rotation angle. Thus, the directional independence of the KE was directly related to the rotation angle. In theoretical calculations, the directional independence of the KE was directly related to the relative value of critical stress. The change in the relative value of the critical stress increased the difficulty of cracking, affecting the accuracy of the KE point. Poisson's ratio considerably affected the FR value, and the in situ stress values of the KE method on various types of rock samples differed. The results of the study can provide insight into the KE mechanism and development of effective methods.

Acoustic emissionFracture mechanicsKaiser effect (KE)Rotation angle

Zhang H.、Zhang W.、Xu X.、Yang G.、Lu K.、Zhou Y.

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College of Resources and Environmental Engineering Guizhou University Huaxi New Campus of Guizhou University

College of Resources and Environmental Engineering Key Laboratory of Karst Georesources and Environment Ministry of Education Guizhou Universit Huaxi New Campus of Guizhou University

2022

10.1016/j.measurement.2022.111291

Measurement

Measurement

SCI
ISSN：0263-2241
年,卷(期)：2022.196
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