Volume 39 Issue 11
Nov.  2014
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Xu Guangli, Dong Jiaxing, Li Zhipeng, Song Shengwu, Zhang Shishu, Wang Jinsheng, 2014. EDZ Assessment for Underground Cavern by Acoustic Wave Method. Earth Science, 39(11): 1599-1606. doi: 10.3799/dqkx.2014.153
Citation: Xu Guangli, Dong Jiaxing, Li Zhipeng, Song Shengwu, Zhang Shishu, Wang Jinsheng, 2014. EDZ Assessment for Underground Cavern by Acoustic Wave Method. Earth Science, 39(11): 1599-1606. doi: 10.3799/dqkx.2014.153
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EDZ Assessment for Underground Cavern by Acoustic Wave Method

doi: 10.3799/dqkx.2014.153
  • 1.

    Engineering Research Center of Rock Soil Drilling & Excavation and Protection of Ministry of Education, China University of Geosciences, Wuhan 430074, China

  • 2.

    Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China

  • 3.

    Chengdu Investigation, Desigu & Research Institute Co., LTD, Power China, Chengdu 610072, China

  • Received Date: 2013-11-15
  • Publish Date: 2014-11-01
    Abstract
  • Excavation Damaged Zone (EDZ) assessment is important for the design, execution and operation of modern underground engineering. However, it is very difficult to determine EDZ because of the complexity of lithology, geostress, excavation method, cavern size and shape, etc.. Based on its definition, EDZ is subdivided into excavation highly damaged zone (EHDZ), excavation slightly damaged zone (ESDZ) and basically undamaged zone in this paper. Acoustic wave velocity method is suggested to determine EDZ. The acoustic wave curves are classified into type Ⅰ, type Ⅱ and type Ⅲ. EHDZ and ESDZ can be qualitatively determined by characteristic points of acoustic wave curves. A damage factor D calculated by the acoustic wave velocities is adapted to quantitatively assess EDZ. It is found that the comprehensive method and index provide us a good assessment of EDZ for underground caverns.

     

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