Use of electromagnetic radiation from fractures for mining-induced stress field assessment
作者: Dazhao SongEnyuan WangXueqiu HeHaishan JiaLiming QiuPeng ChenSida Wang
作者单位: 1School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, People’s Republic of China
2Key Laboratory of Gas and Fire Control for Coal Mines, Xuzhou 221116, People’s Republic of China
3School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, People’s Republic of China
4Zhong-an Academy of Safety Engineering, Beijing 100083, People’s Republic of China
5School of Safety Engineering, North China Institute of Science and Technology, Yanjiao 101601, 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/aaa26d
原始语种摘要: This paper presents an electromagnetic radiation-based method to qualitatively assess mine-induced stress field at the longwall face. We first analyze the correlation between electromagnetic (EM) signals and stress, and then measure the signals and drilling bits in both the strike and dip directions at the 11702 working face of Nuodong Coal Mine, China, which indirectly verifies this method. Results show that there is a positive correlation between EM intensity and stress. In the same coal seam, the frequency of EM signals is inversely proportional to the extended size of the cracks inside the coal rock, and the dominant frequency (DF) of the EM signal is negatively related to external stress. Test results in Nuodong Coal Mine show that the EM intensity and DF can well reflect a stress...
全文获取路径: IOP  (合作)

  • stress 应力
  • field 
  • qualitatively 从质量方面看
  • radiation 辐射
  • propagation 传播
  • inside 内部
  • induced 感应的
  • directions 指示
  • intensity 强度
  • assessment 评价