立井帷幕注浆后井壁-注浆体-围岩三元非均匀阻水结构水压传递特性及现场应用OA
Water pressure transmission characteristics and field application of the shaft wall-grouting body-surrounding rock tri-element heterogeneous water-resisting structure following vertical shaft curtain grouting
立井帷幕注浆后井壁-注浆体-围岩三元非均匀阻水结构水压传递特性研究对深部富水立井井筒安全及稳定至关重要.考虑井壁、注浆体和围岩体的共同作用,提出了井壁-注浆体-围岩三元非均匀阻水结构,并基于稳态渗流理论建立了渗流场力学模型.以湖北宜昌高烽磷矿为工程背景,探讨了井筒设计半径、单位高度井筒涌水量、注浆体厚度及井壁渗透系数等参数对水压传递系数的影响,为立井施工设计提供了一种新的理论依据.研究结果表明:在相同的地层水压条件下,水压传递系数随着井筒设计半径增大而增大,但阻水结构的阻水能力减弱;水压传递系数λ随单位高度井筒涌水量q增加而降低,井壁渗透系数与注浆体渗透系数之比(k1/k2)值越小,阻水效果越好;注浆体渗透系数k2的降低、注浆体厚度4r2的增加、井壁渗透系数k1与围岩渗透系数k3之比(k1/k3)的减小均可降低水压传递系数λ,注浆体渗透系数的降低对提高注浆效果具有积极作用.工程实践表明,井壁-注浆体-围岩三元阻水结构能够实现井筒总渗漏量的有效控制,可为立井帷幕注浆工程提供一定的参考.
The study on the water pressure transmission characteristics of the shaft wall-grouting body-surrounding rock tri-element heterogeneous water-resisting structure is extremely important for the safety and stability of deep water-rich shafts.First,the shaft wall-grouting body-surrounding rock tri-element heterogeneous water-resisting structure was proposed considering their combined effect,and the mechanical model of the seepage field was established in the light of the steady-state seepage theory.Based on the engineering background of Gaofeng Phosphate Mine in Yichang,Hubei Province,the influences of parameters such as wellbore design radius,water inflow per unit height,grouting body thickness,and shaft wall permeability coefficient on the water pressure transmission coefficient were discussed,which provided new theoretical insights for shaft design and construction.The main research results are as follows:Under the same formation water pressure conditions,the water pressure transmission coefficient grows with the increase of the wellbore design radius,but the water-resisting capacity of the water barrier weakens.The water pressure transmission coefficient λ decreases with the increase of the water inflow per unit height q.The smaller the ratio of the shaft wall permeability coefficient to the grouting body permeability coefficient k1/k2,the better the water-resisting effect.A decrease in the grouting body permeability coefficient k2,an increase in the grouting body thickness Δr2,and a decrease in the ratio of the shaft wall permeability coefficient to the surrounding rock permeability coefficient k1/k3 can all bring about a reduction in the water pressure transmission coefficient λ.The reduction in the grouting body permeability coefficient is conducive to improving the grouting effect.Engineering practices demonstrate that the shaft wall-grouting body-surrounding rock tri-element water-resisting structure effectively controls total shaft leakage,providing critical references for vertical shaft curtain grouting projects.
赵延林;罗睿;廖健;谭哲;张敏真;刘钊
湖南科技大学资源环境与安全工程学院,湖南 湘潭 411201湖南科技大学资源环境与安全工程学院,湖南 湘潭 411201湖南工程学院建筑工程学院,湖南 湘潭 411104湖南科技大学资源环境与安全工程学院,湖南 湘潭 411201湖南科技大学资源环境与安全工程学院,湖南 湘潭 411201湖南楚湘建设工程集团有限公司,湖南 长沙 410114
矿业与冶金
立井井壁注浆体阻水结构水压传递系数渗流场理论
shaft wallgrouting bodywater-resisting structurewater pressure transmission coefficientseepage field theory
《采矿与安全工程学报》 2026 (3)
653-662,10
国家自然科学基金面上项目(52274118)2023年度芙蓉计划省企业科技创新创业团队湖南省教育厅优秀青年项目(24B0682)
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