Characteristics and generation mechanism of ULF magnetic signals during coal deformation under uniaxial compression
作者: Chengwu LiShuai FuCheng GuanTianyu WanBeijing Xie
作者单位: 1College of Resources and Safety Engineering, China University of Mining & Technology, Beijing 100083, People’s Republic of China
刊名: Journal of Geophysics and Engineering, 2018, Vol.15 (4)
来源数据库: Institute of Physics Journal
DOI: 10.1088/1742-2140/aaac59
原始语种摘要: Low-frequency magnetic signals with the advantages of fewer interfering factors and longer propagation ranges are more useful for improving the accuracy of monitoring and early warning technology for coal or rock dynamic disasters. In this paper, the characteristics of low-frequency magnetic signals generated during uniaxial compression failure of coal are investigated in the time and frequency domain. The generation mechanism of low-frequency magnetic signals is proposed based on the correlation between low-frequency magnetic signals and micro-seismic signals. The experimental results show that (1) abnormal ultra-low-frequency (ULF) magnetic signals can be clearly observed in the process of coal failure. The signals occur as oscillating pulses, with amplitudes between 13 and 156 nT. (2)...
全文获取路径: IOP  (合作)

  • compression 压缩
  • uniaxial 单轴的
  • magnetic 磁的
  • deformation 应变
  • rotation 旋转
  • generation 世代
  • mechanism 机构
  • improving 改进
  • motion 运动
  • charge 电荷