文献类型：期刊文献

英文题名：Cracking Characteristics and Damage Assessment of Filled Rocks Using Acoustic Emission Technology

作者：Niu, Yong[1];Hu, Yun-Jin[1];Wang, Jin-Guo[2]

机构：[1]Shaoxing Univ, Sch Civil Engn, Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312099, Zhejiang, Peoples R China;[2]Hohai Univ, Sch Earth Sci & Engn, Nanjing 211100, Jiangsu, Peoples R China

年份：2023

卷号：23

期号：4

外文期刊名：INTERNATIONAL JOURNAL OF GEOMECHANICS

收录：SCI-EXPANDED(收录号：WOS:001027310000031)、、EI(收录号：20230513456955)、Scopus(收录号：2-s2.0-85146835091)、WOS

基金：Acknowledgments The present work was supported by the National Natural Science Foundation of China (Grant No. 41977256), the Zhejiang Natural Science Foundation (Grant No. LHZ21D020001), and the Scientific Research Fund Project of Shaoxing University (Grant No. 2021LG014), which are all gratefully acknowledged.

语种：英文

外文关键词：Fillings; Acoustic emission; Fracture behavior; Damage; Stability

外文摘要：Natural flaws containing fillings strongly affect the mechanical properties and failure process of rocks in practical engineering. In this work, uniaxial compression tests are performed on filled and unfilled red sandstone specimens containing two parallel dentate flaws. Two monitoring technologies--acoustic emission (AE) and high-speed camera--are employed to record the cracking process of the flawed rocks. The effects of filling and ligament angles on the mechanical properties of the flawed rocks are analyzed. The relationship between AE parameters and stress-strain curves is established in order to evaluate the cracking process. The fracture behaviors between the filled and unfilled specimens are qualitatively compared. An intensity analysis method, based on the historic index and severity, is employed to assess the damage level of the flawed rocks. Simultaneously, a judgmental design criterion, including safety, early warning, and instability, is developed, which can be employed to evaluate the stability of rock structures.