刘正茂, 陈岩, 李虎,等.千米深井超前注浆加固浆液渗流扩散规律及应用研究[J].河南理工大学学报（自然科学版）,2026,45(2):166-174.

LIU Z M, CHEN Y, LI H,et al.Seepage diffusion and application of advanced grouting in Kilometer-deep mines[J].Journal of Henan Polytechnic University(Natural Science) ,2026,45(2):166-174.

千米深井超前注浆加固浆液渗流扩散规律及应用研究

刘正茂1, 陈岩2, 李虎1, 刘庆波3, 张智柳1, 朱阳涛1, 孟庆保1, 李帅1, 宗承波1, 王嘉豪2

1.中煤新集阜阳矿业有限公司，安徽 阜阳  236153；2.河南理工大学 煤炭安全生产与清洁高效利用省部共建协同创新中心，河南 焦作  454003；3.中煤新集能源股份有限公司，安徽 淮南  232001

摘要: 目的 为了解决深井软岩高地压带来的采煤工作面片帮冒顶问题，开展千米深井超前注浆加固浆液渗流扩散规律及应用研究。  方法 以口孜东矿140504工作面为背景，采用扇形注浆孔布置方案，超前预注水泥浆加固顶板，运用COMSOL Multiphysics数值模拟软件，分析双孔注浆时，浆液扩散半径、注浆压力随时间的变化规律，并结合FLAC 3D（fast lagrangian analysis of continua 3D）软件，模拟注浆前后围岩竖直位移变形量进行注浆效果对比分析。  结果 结果表明：（1）浆液扩散形态为同心圆，浆液质量浓度在注浆孔处最大，以轴对称形式由高变低向四周逐渐衰减扩散；扩散半径随时间增加非线性增大；（2）水泥浆液在注浆17 h时扩散半径最大。基于最大扩散半径，改变终孔间距，模拟得到浆液扩散范围相交、相切、相离3种加固效果，最终以相切状态时的浆液扩散结果得到注浆孔间距大小；（3）注浆压力在注浆孔处几乎保持不变，且以对称形式，向两边先急剧减小后趋于稳定；（4）模拟发现，顶板注浆后，其最大垂直位移降低了21.4%，说明超前预注浆加固顶板能够对上覆岩层的位移进行有效控制；（5）现场工业实践可知，与注浆加固前相比，注浆加固后可大幅减少采煤工作面人员数量，提高工作面月推进速度。基于实际注浆量参数统计，终孔终压值应不小于8 MPa。  结论 研究结果可为千米深井工作面超前注浆加固实践提供参考。

关键词:预注浆;浆液扩散;注浆压力;终孔间距;千米深井

doi:10.16186/j.cnki.1673-9787.2024040033

基金项目:国家自然科学基金资助项目（51904092）；河南省科技攻关项目（242102321163）；河南省高等学校重点科研项目（24A440004）；河南理工大学安全学科“双一流”创建面上项目培育资助项目（AQ20240735）

收稿日期:2024/04/18

修回日期:2024/07/11

出版日期:2026/01/28

Seepage diffusion and application of advanced grouting in Kilometer-deep mines

Liu Zhengmao1, Chen Yan2, Li Hu1, Liu Qingbo3, Zhang Zhiliu1, Zhu Yangtao1, Meng Qingbao1, Li Shuai1, Zong Chengbo1, Wang Jiahao2

1.China Coal Xinji Fuyang Mining Co.， Ltd.， Fuyang  236153， Anhui， China；2.Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization， Henan Polytechnic University， Jiaozuo  454003， Henan， China；3.China Coal Xinji Energy Co.， Ltd.， Huainan  232001， Anhui， China

Abstract: Objectives Rib failure and roof collapse in deep， soft-rock coal faces under ground pressure are addressed through investigation of seepage diffusion laws and field application of advance grouting for kilometer-deep mining.  Methods Taking the 140504 working face of Kouzidong Mine as a case study， a fan-shaped grouting hole layout is designed for advance roof reinforcement with cement slurry. Using COMSOL Multiphysics， the variations in slurry diffusion radius and grouting pressure over time under double-hole grouting are simulated. FLAC3D is then employed to compare the vertical displacement of the surrounding rock before and after grouting， thereby evaluating the reinforcement effect.  Results The results show that： （1） the slurry diffuses concentrically， with the highest concentration at the grouting hole， decreasing axisymmetrically outward； the diffusion radius increases nonlinearly with time. （2） The maximum diffusion radius is attained after 17 h of grouting. By varying the final hole spacing based on this radius， three reinforcement scenarios—overlapping， tangent， and separated diffusion zones—are simulated； the tangent condition is adopted to determine the optimal grouting hole spacing. （3） The grouting pressure remains nearly constant near the injection point， then drops sharply and stabilizes symmetrically toward both sides. （4） Simulation indicates that roof grouting reduces the maximum vertical displacement by 21.4%， demonstrating effective control of overlying-strata movement. （5） Field practice confirms that grouting reinforcement significantly reduces personnel requirements and increases the monthly face-advance rate by 62.4%. Based on actual grouting data， the final hole pressure should be no less than 8 MPa.  Conclusions The findings provide a practical reference for the design and implementation of advance grouting reinforcement in kilometer-deep coal faces.

Key words: pre-grouting; slurry diffusion; grouting pressure; end hole spacing; thousand meters deep mine