重庆大学学报2024，Vol.47Issue(4)：64-85,22.DOI:10.11835/j.issn.1000.582X.2024.04.006
采空区岩体粗糙单裂隙中浆液扩散机理研究
Grout diffusion mechanism for rough single fracture in the goaf rock mass
摘要
Abstract
This study presents a 3D rough fracture grouting model on an engineering scale,specifically investigating the diffusion mechanism of slurry under different fracture surface roughness,openness,grouting pressure,fracture inclination,and slurry viscosity in fractured rock bodies.Using the software COMSOL Multiphysics,the study examines the slurry flow law within the fractures.It is observed that the profile of the slurry diffusion surface is influenced by the roughness of the fracture surface.A rough fracture surface hinders slurry diffusion and is a key cause of anisotropy in slurry diffusion.Furthermore,a quadratic polynomial relationship is identified between the grouting rate and the degree of opening.Large fracture opening results in smaller losses in grouting rate.Injection pressure is found to weakly affect the slurry diffusion profile,mainly changing the diffusion radius of the slurry.There is a positive correlation between injection pressure and diffusion radius,with a quadratic polynomial relationship with injection rate.Higher injection pressure leads to lower loss in injection rate.The effect of slurry viscosity on the slurry diffusion pattern depends on the range of viscosities,primarily changing the range of slurry diffusion.This study sheds light on the slurry diffusion pattern in rough fissures and provides a theoretical basis for grouting prediction and management in extraction area.关键词
注浆/采空区/注浆模型/扩散机理/粗糙度/浆液黏度Key words
grouting/mining area/grouting model/diffusion mechanism/roughness/slurry viscosity分类
建筑与水利引用本文复制引用
刘少炜,刘先珊,张普纲,侯泽林,潘玉华,熊振瑀..采空区岩体粗糙单裂隙中浆液扩散机理研究[J].重庆大学学报,2024,47(4):64-85,22.基金项目
山西省交通新技术发展有限公司资助项目(SXJTJS-02040-2022-第 9 号) （SXJTJS-02040-2022-第 9 号）
国家自然科学基金资助项目(52279094) （52279094）
重庆市自然科学基金面上项目(CSTB2023NSCQ-MSX0069).Supported by Communications New Technology Development Company of Shanxi Province(SXJTJS-02040-2022-No.9),Natural Science Foundation of China(52279094)and Natural Science Foundation of Chongqing(CSTB2023NSCQ-MSX0069). （CSTB2023NSCQ-MSX0069）
