Volume 48 Issue 4
Aug.  2020
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LI Wensong, DANG Yakun, ZHU Mingcheng, GAO Ya. Construction technology of vertical concealed laying of anti-seepage membrane for water cutoff curtain in the open-pit coal mine[J]. COAL GEOLOGY & EXPLORATION, 2020, 48(4): 68-73. DOI: 10.3969/j.issn.1001-1986.2020.04.010
Citation: LI Wensong, DANG Yakun, ZHU Mingcheng, GAO Ya. Construction technology of vertical concealed laying of anti-seepage membrane for water cutoff curtain in the open-pit coal mine[J]. COAL GEOLOGY & EXPLORATION, 2020, 48(4): 68-73. DOI: 10.3969/j.issn.1001-1986.2020.04.010
shu

Construction technology of vertical concealed laying of anti-seepage membrane for water cutoff curtain in the open-pit coal mine

  • 1. Dayan Company of China Energy Investment Corporation, Hulun Buir 021122, China;

  • 2. Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China;

  • 3. Shaanxi Key Laboratory of Coal Mine Water Hazard Prevention and Control Technology, Xi'an 710077, China

Funds: 

National Key R&D Program of China(2017YFC0804106)

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  • Received Date: April 06, 2020
  • Revised Date: June 22, 2020
  • Published Date: August 24, 2020
    Graphical Abstract
    • Abstract
  • Anti-seepage membrane(HDPE geomembrane) is widely used in anti-seepage projects currently that mainly prevent pollution, leakage and diffusion, and its laying form was various. In an underground water cutoff curtain project of an open-pit coal mine in China, the anti-seepage membrane was laid vertically as the main body of the water cutoff curtain wall, and the largest concealed depth was about 50 m. The different groove sections was overlapping connected by using connection box technology. Through the grouting and backfilling process, the impermeability of the curtain wall was improved and the anti-seepage membrane was compacted. Finally, pumping test in the surrounding wells was used to verify the impermeability of the curtain wall. The results showed that the permeability coefficient of anti-seepage membrane curtain wall was just 8.6×10-7 cm/s which met the design requirements. The anti-seepage membrane curtain wall has the advantages of high efficiency, low cost, and environmental protection. The successful application of the anti-seepage membrane in this project has significant reference for other similar projects.
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    • References (16)
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