The evolution law of acoustic emission events during the fracture process of altered granite gneiss

ZHANG Peng-hai; YANG Tian-hong; XU Tao; YU Qing-lei; ZHOU Jing-ren; ZHAO Yong-chuan

doi:10.16285/j.rsm.2017.08.005

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The evolution law of acoustic emission events during the fracture process of altered granite gneiss

更新时间：2026-06-25

- The evolution law of acoustic emission events during the fracture process of altered granite gneiss
- Vol. 38, Issue 8, Pages: 2189-2197(2017)
- 作者机构：
  
  东北大学岩石破裂与失稳研究所,辽宁,沈阳,110819
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.08.005
  CLC： TU454
- Online First：05 June 2018，
  
  Published：2017
- 稿件说明：
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ZHANG Peng-hai, YANG Tian-hong, XU Tao, et al. The evolution law of acoustic emission events during the fracture process of altered granite gneiss[J]. 2017, 38(8): 2189-2197.
DOI：

ZHANG Peng-hai, YANG Tian-hong, XU Tao, et al. The evolution law of acoustic emission events during the fracture process of altered granite gneiss[J]. 2017, 38(8): 2189-2197. DOI： 10.16285/j.rsm.2017.08.005.

摘要

通过单轴压缩条件下的声发射试验，分析了蚀变花岗片麻岩破坏过程中声发射事件的演化规律，研究发现：对于多数试件，高能级声发射事件的首次出现可作为岩石处于高应力水平的标志，中能级声发射事件在试件空间内形成贯通分布可作为岩石应力水平进一步上升的标志，最后贯通区出现高能级声发射事件可作为岩石破坏的前兆现象；发生脆性破坏的试件，不会出现中能级声发射事件在试件空间内形成贯通分布的现象；对于含弱区的试件，首个高能级声发射事件会出现于低应力水平，此时岩石内声发射事件呈条带状密集分布于高能级声发射事件周围，其他区域的声发射事件少、能级低。以上研究为利用声发射信息识别岩石应力水平及评价岩石稳定性提供了试验依据。

Abstract

In this study

acoustic emission (AE) tests were conducted on altered granite gneiss specimens under uniaxial compression conditions. The evolution laws of AE events during the failure processes of specimens were further investigated. The results showed that for most specimens

the first occurrence of the high-energy level AE event indicated that the specimens were at the high-stress level. It is found that the stress level further increased when the intermediate-energy level AE events distribute throughly in specimens. The imminent rock failure was identified by the occurrence of the high-energy level AE event in the final through-going area. For brittle failure specimens

the through-going distribution phenomena of the intermediate-energy level AE events would not occur. For specimens contained weak-zones

the first high-energy level AE event took place at the low-stress level. In the meantime

the intermediate-energy level AE events gathered in a band shape around the high-energy level AE event. However

the density and energy level of AE events were low in the area far away from the high-energy level AE event. The research results can provide a testing basis for the identification of stress level and the evaluation of rock stability.

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