基于遇水膨胀橡胶的分层抽水管外止水新方法及其优化  

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

作　　者：郑向华[1] 袁伟 罗运祥 成聪 ZHENG Xianghua;YUAN Wei;LUO Yunxiang;CHENG Cong(School of Intelligent Manufacturing,Chengdu Technological University,Chengdu 611730,China;Sichuan Institute of Geological Engineering Investigation Group Co.,Ltd,Chengdu 610032,China;School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]成都工业学院智能制造学院,四川成都611730 [2]四川省地质工程勘察院集团有限公司,四川成都610032 [3]西南交通大学机械工程学院,四川成都610031

出　　处：《煤田地质与勘探》2021年第6期151-159,共9页Coal Geology & Exploration

基　　金：中国地质调查局地质调查项目(DD20190128);成都工业学院校级科研项目(理工科重点)(2019ZR011)。

摘　　要：分层抽水试验是水文地质勘探的重要技术内容。针对传统分层抽水管外止水方法效率低、可靠性及可控性差等难题,利用聚丙烯酸钠树脂的高吸水特性,开发了遇水膨胀橡胶,提出一种基于遇水膨胀橡胶的管外止水新方法,并采用响应面法对该新方法进行了优化研究。以吸水膨胀率为响应指标,通过Box-Behnken试验设计构建代理模型,探究不同工艺、工况参数及其交互作用对橡胶吸水膨胀性能的影响,达到优化工艺、预测工况的双重目的。结果表明:遇水膨胀橡胶的最佳工况和工艺参数组合为水溶液pH值7.0、吸水时间136 h、聚丙烯酸钠添加量61份、改性芳纶短纤维添加量4.5份。最后,研制了基于遇水膨胀橡胶的管外止水装置,经试验验证了所提方法的可行性,对地下水资源勘探利用具有工程应用价值。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.

关 键 词：分层抽水 管外止水 遇水膨胀橡胶 吸水膨胀率 响应面法 代理模型 

分 类 号：TD12[矿业工程—矿山地质测量]