Tomographic imaging of high seismic activities in underground island longwall face

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• 作者：Anye Cao ; Linming Dou ; Wu Cai ; Siyuan Gong ; Sai Liu…
• 关键词：Seismic hazard ; Passive tomography ; P ; wave velocity ; Island face ; Overburden
• 刊名：Arabian Journal of Geosciences
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：9
• 期：3
• 全文大小：1,391 KB
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• 作者单位：Anye Cao (1) (2)
  Linming Dou (1) (2)
  Wu Cai (2)
  Siyuan Gong (2)
  Sai Liu (1) (2)
  Yongliang Zhao (3)
  
  1. Key Laboratory of Deep Coal Resource Mining, School of Mines, Ministry of Education of China, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China
  2. State Key Laboratory of Coal Resources and safe Mining, School of Mines, China University of Mining and Technology, Xuzhou, 221116, China
  3. Baodian Coal Mine, Yanzhou Coal Mining Company Limited, Zoucheng, Shandong, 273513, China
  
• 刊物类别：Earth and Environmental Science
• 出版者：Springer Berlin Heidelberg
• ISSN：1866-7538

文摘

Anomalous information identification is a key issue for seismic hazard prevention in underground mining. Velocity tomograms can image the stress redistribution around coal face and provide better understanding of strata failure mechanisms. In this paper, based on microseismic events recorded during mining operation, passive tomographic imagings have been presented to assess strong tremor hazard and locate high seismic activity zones around an island coal face under super-thick strata. The zones of high velocity or velocity gradient anomalies have been found to correlate well with the distribution of strong tremors, indicating that velocity tomography is feasible for seismic hazard assessment and risk region division in underground mining.