Scholarlink

<p>Microseismic monitoring plays a pivotal role in understanding rock fracture mechanisms in engineering. This study integrates laboratory-scale acoustic emission experiments with engineering -scale microseismic monitoring to examine the double dominant frequency characteristics of signals generated during granite fracture. Experiments were conducted under various loading conditions, including direct tensile loading, Brazilian splitting, uniaxial compression, and direct shear. The study systematically analyzes the influence of experimental parameters such as loading mode, loading rate, and specimen size on the occurrence and characteristics of double dominant frequencies. The findings reveal that both laboratory acoustic emission signals and field microseismic signals exhibit double dominant frequency. The low-frequency band is associated with tensile fracture mechanisms, while the high-frequency band corresponds to shear fractures. Although loading parameters affect the relative energy distribution between the two frequency bands, they do not significantly alter the frequency range or central frequencies. A physical mechanism model was developed to explain the formation of double dominant frequencies, linking micro-tensile fractures to low-frequency signals. This study establishes a multiscale relationship between spectral features and fracture types, offering a theoretical and experimental framework for advancing seismic signal analysis in rock mechanics and geotechnical engineering.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Double dominant frequency of microseismic signal and micro-fracture mechanism of granite rockmass

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年10月6日

查看全文
  • Sihong Chen,
  • Bohu Zhang,
  • Chaobo Peng,
  • Zhe Wang,
  • Ping Wen,
  • Jianhui Deng,
  • Hua Li

摘要

Microseismic monitoring plays a pivotal role in understanding rock fracture mechanisms in engineering. This study integrates laboratory-scale acoustic emission experiments with engineering -scale microseismic monitoring to examine the double dominant frequency characteristics of signals generated during granite fracture. Experiments were conducted under various loading conditions, including direct tensile loading, Brazilian splitting, uniaxial compression, and direct shear. The study systematically analyzes the influence of experimental parameters such as loading mode, loading rate, and specimen size on the occurrence and characteristics of double dominant frequencies. The findings reveal that both laboratory acoustic emission signals and field microseismic signals exhibit double dominant frequency. The low-frequency band is associated with tensile fracture mechanisms, while the high-frequency band corresponds to shear fractures. Although loading parameters affect the relative energy distribution between the two frequency bands, they do not significantly alter the frequency range or central frequencies. A physical mechanism model was developed to explain the formation of double dominant frequencies, linking micro-tensile fractures to low-frequency signals. This study establishes a multiscale relationship between spectral features and fracture types, offering a theoretical and experimental framework for advancing seismic signal analysis in rock mechanics and geotechnical engineering.