Volume 48 Issue 2
Apr.  2020
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ZHANG Yan, TIAN Zenglin, CAO Haidong, DANG Yakun, WANG Hai, LI Heping, HAN Qiang. Application of MJS construction method in gravel layer and pile forming difference[J]. COAL GEOLOGY & EXPLORATION, 2020, 48(2): 147-151,160. DOI: 10.3969/j.issn.1001-1986.2020.02.023
Citation: ZHANG Yan, TIAN Zenglin, CAO Haidong, DANG Yakun, WANG Hai, LI Heping, HAN Qiang. Application of MJS construction method in gravel layer and pile forming difference[J]. COAL GEOLOGY & EXPLORATION, 2020, 48(2): 147-151,160. DOI: 10.3969/j.issn.1001-1986.2020.02.023
shu

Application of MJS construction method in gravel layer and pile forming difference

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

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

Funds: 

Special Project of Science and Technology Innovation and Entrepreneurship Fund of Tiandi Science and Technology Co. Ltd.(2019-TD-MS014)

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  • Received Date: August 28, 2019
  • Revised Date: December 15, 2019
  • Published Date: April 24, 2020
    Graphical Abstract
    • Abstract
  • During the construction of water cutoff curtain in an open-pit coal mine in China, parts of the grouting groove couldnot be constructed due to many obstacles such as overhead high-voltage wire, buried optical cable and buried drainage pipe, and MJS construction method was chosen instead to build the cutoff curtain. The results of MJS pile tests show that the quality of piles formed by this method was obviously different in the construction area of gravel layer on the east and west sides. By the methods of geological exploration, gravity penetration test and pumping test, this paper makes a comparative analysis of gravel thickness, gravel diameter, sand content, formation compactness and permeability of aquifer. The results show that the pile can not be formed in the east construction area with thick gravel layer, small sand content, dense stratum and strong permeability, while the pile forming quality met the requirements in the west construction area where the conditions were opposite. The research results broaden the application scope of MJS construction method and have guiding significance for the selection of construction parameters under similar conditions.
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    • References (17)
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