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PU Zhiguo，DING Xiang，LI Zhe，et al. Efficient treatment technology of incrementally open water gushing channel under dynamic water conditions[J]. Coal Geology & Exploration，2022，50(5)：73−81. DOI: 10.12363/issn.1001-1986.21.09.0542
Citation: PU Zhiguo，DING Xiang，LI Zhe，et al. Efficient treatment technology of incrementally open water gushing channel under dynamic water conditions[J]. Coal Geology & Exploration，2022，50(5)：73−81. DOI: 10.12363/issn.1001-1986.21.09.0542
shu

Efficient treatment technology of incrementally open water gushing channel under dynamic water conditions

  • 1.

    China Coal Energy Research Institute Co. Ltd., Xi’an 710054, China

  • 2.

    China Coal Rock Burst & Water Hazard Control Center, Ordos 017000, China

  • 3.

    Shaanxi Shenyan Coal Co. Ltd., Yulin 719000, China

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  • Received Date: September 29, 2021
  • Revised Date: December 24, 2021
  • Available Online: May 10, 2022
  • Published Date: May 24, 2022
    Graphical Abstract
    • Abstract
  • In Yushen mining area of Shaanxi Province, a blasting expansion fissure on the eastern side of the Xiwan Open-pit Coal Mine communicates the water-bearing body of burnt rock outside the pit, and an incrementally open water gushing channel with a length greater than 65 m is formed. The water volume gushing from burnt rock stabilizes at about 400 m3/h and the flow velocity is as high as 0.36 m/s, resulting in a series of problems in ecology, environmental protection, economy and safety. To block the water gushing channel and solve the problem as soon as possible, a quick detection method was proposed for determining the location of the main channel of the side blast rupture gap, considering environmental protection, construction period, cost and construction conditions. In view of the extremely low aggregate retention rate of the conventional infusion scheme of the incrementally open water gushing channel under dynamic water conditions, a new type of aggregate filling technology is proposed. On basis of the methods, two boreholes connected to the main water gushing channel were successfully detected, and the channel location was discovered. For the channel treatment, an “aggregate blocking net” was set at the outer port of the gushing channel and in which the magnesium slag core and calcareous nodules were adopted to improve the retention rate of aggregates, and the rapid filling of the large channel was realized. After the rapid reinforcement of the double slurry, the water output volume is only 6.6 m3/h. The channel was successfully blocked in only six days. The results show that the blasting crack exploration method and the blocking scheme of incremental open water inflow channel are scientific and efficient. This case can provide a reference for the efficient management of water gushing channels under similar conditions.
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    • References (28)
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