Volume 49 Issue 6
Dec.  2021
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ZHENG Xianghua, YUAN Wei, LUO Yunxiang, CHENG Cong. New method and optimization research on water sealing outside casing based on water-swelling rubber for stratified pumping[J]. COAL GEOLOGY & EXPLORATION, 2021, 49(6): 151-159. DOI: 10.3969/j.issn.1001-1986.2021.06.018
Citation: ZHENG Xianghua, YUAN Wei, LUO Yunxiang, CHENG Cong. New method and optimization research on water sealing outside casing based on water-swelling rubber for stratified pumping[J]. COAL GEOLOGY & EXPLORATION, 2021, 49(6): 151-159. DOI: 10.3969/j.issn.1001-1986.2021.06.018
shu

New method and optimization research on water sealing outside casing based on water-swelling rubber for stratified pumping

  • 1.

    School of Intelligent Manufacturing, Chengdu Technological University, Chengdu 611730, China

  • 2.

    Sichuan Institute of Geological Engineering Investigation Group Co., Ltd, Chengdu 610032, China

  • 3.

    School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China

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  • Received Date: June 06, 2021
  • Revised Date: August 22, 2021
  • Available Online: December 29, 2021
  • Published Date: December 24, 2021
    Graphical Abstract
    • Abstract
  • Stratified pumping test is a key technique for hydrogeological exploration. To solve the problems of low efficiency and poor reliability and controllability of the traditional water-sealing methods outside casing for stratified pumping, a water-swelling rubber was developed based on high water absorption of the sodium polyacrylate resin, and a new approach based on water-swelling rubber was proposed and optimized by the response surface methodology in this paper. With the water swelling ratio of the rubber as response index, a surrogate model was constructed by the Box-Behnken experimental design to study the influence of different process parameters, working condition parameters, and their interaction on the water-swelling performance. Furthermore, the preparation process of water-swelling rubber was optimized and its working condition was predicted. Optimization results indicate that the optimum combination of working conditions and preparation process parameters of water-swelling rubber includes aqueous solution at pH 7.0, water absorption time of 136 h, sodium polyacrylate 61 phr, and modified aramid short fiber 4.5 phr. Finally, the water-sealing device outside casing was developed, and the feasibility of the proposed method was verified through experiments, which has engineering value for the exploration and utilization of groundwater resources.
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    • References (22)
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