中南大学学报（自然科学版）2026，Vol.57Issue(2)：732-743,12.DOI:10.11817/j.issn.1672-7207.2026.02.020
基于核磁共振技术的裂隙砂岩注浆扩散特性
Grouting diffusion characteristics of fractured sandstone based on nuclear magnetic resonance technology
摘要
Abstract
Nuclear magnetic resonance(NMR)testing technology was employed to conduct grouting diffusion experiments on sandstone samples with varying fracture properties under different grouting conditions.The evolution patterns of effective grouting time,filling rate,and grout injection volume during the grouting process were quantitatively analyzed.The results show that increasing fracture aperture can significantly enhance total grout injection volume and fracture-filling rate,while marginally reduce pore-filling rate.Increasing grouting pressure shortens effective grouting time and substantially improves fracture-filling rate,but slightly decreases pore-filling rate.Variations in polymer-cement(p/c)ratio exert complex influences.Low p/c ratio grouts show higher injectability during early stages,but increasing viscosity in high p/c ratio grouts later reduces injection volumes.Rising fracture density increases total grout injection volume and pore-filling rate,though effective grouting time is prolonged,and both total and fracture-filling rates exhibit an initial increase followed by a decrease.关键词
注浆/裂隙砂岩/低场核磁共振/浆液扩散Key words
grouting/fractured sandstone/low field nuclear magnetic resonance/grout diffusion分类
能源科技引用本文复制引用
翁磊,郭强,张皓量,王靖宇,刘泉声,储昭飞,吴龙骥..基于核磁共振技术的裂隙砂岩注浆扩散特性[J].中南大学学报（自然科学版）,2026,57(2):732-743,12.基金项目
国家自然科学基金资助项目(52278412) （52278412）
湖北省自然科学基金资助项目(2024AFB752) （2024AFB752）
煤炭开采水资源保护与利用全国重点实验室开放基金课题(GJNY-21-41-14)(Project(52278412)supported by the National Natural Science Foundation of China （GJNY-21-41-14）
Project(2024AFB752)supported by the Natural Science Foundation of Hubei Province （2024AFB752）
Project(GJNY-21-41-14)supported by the Open Fund of State Key Laboratory of Water Resource Protection and Utilization in Coal Mining) （GJNY-21-41-14）
