岩土力学2026，Vol.47Issue(7)：2248-2260,13.DOI:10.16285/j.rsm.2025.0868
改性水泥基磁性浆液及磁注浆突水封堵研究
Research on modified cement-based magnetic slurry and magnetic grouting for water inrush plugging
摘要
Abstract
Water outbursts represent one of the primary geological hazards in underground engineering.Traditional grouting materials exhibit poor retention rates and weak erosion resistance,resulting in inadequate sealing effectiveness.To address this,the team independently developed a modified cement-based magnetic grouting material.Magnetic adsorption properties and SEM analyses were conducted to investigate the influence of magnetic powder dosage on magnetic adsorption performance.The study revealed the cementitious hardening mechanism at the microscopic level,where additives synergistically regulate cement particle dispersion and accelerate hydration processes.Through pipe-type fissure water ingress sealing tests,the pressure variation pattern—the"gradual increase-abrupt surge-sudden drop-stabilization"time-varying pattern—under different magnetic powder dosages,sealing section lengths,and magnetic induction intensities was systematically investigated.Results indicate that increasing magnetic induction intensity from 0.289 5 T to 0.526 5 T enhances magnetic adsorption performance by 28.12%;under identical conditions,raising magnetic induction intensity from 0.412 3 T to 0.526 5 T increases sealing water pressure by 24.7%;and increasing the magnetic powder content from 20%to 40%boosts the plugging water pressure by 38.5%.By coupling the magnetic field force with the Navier-Stokes(N-S)equation,a prediction model for water outburst plugging under magnetic field influence was established.The theoretical peak plugging pressure value exhibited an error of less than 9%compared to the experimental value.This model provides valuable guidance for refining the theory and engineering application of magnetic slurries.关键词
管道型裂隙/突水封堵/磁性浆液/磁感应强度Key words
pipe-type fissures/water inrush plugging/magnetic slurry/magnetic induction intensity分类
建筑与水利引用本文复制引用
刘杰,乔志存,杨渝南,黎照,莫承林,鲍晓鹏,蔡铭阳..改性水泥基磁性浆液及磁注浆突水封堵研究[J].岩土力学,2026,47(7):2248-2260,13.基金项目
国家自然科学基金(No.52079071) （No.52079071）
湖北巴东地质灾害国家野外科学观测研究站开放基金(No.BNORSG202313). This work was supported by the National Natural Science Foundation of China(52079071)and the Open Fund of National Field Scientific Observation and Research Station for Geological Hazards in Badong,Hubei Province(BNORSG202313). （No.BNORSG202313）
