基于泥砂介质的注浆渗流-渗透过程分析与力学机理
Grouting Seepage-penetration Process Analysis and Mechanics Mechanism Research on Clay Sand Media
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摘要: 为研究泥砂介质中注浆扩散过程及其通道渗流与孔隙渗透的力学机理，基于高压密封注浆实验系统进行注浆实验，得出注浆扩散过程是由浆液在通道渗流和通道周边孔隙渗透组成。运用流体力学推导分析了指形渗流通道内液体渗流过程的压力变化，得出浆液压力损失随浆液黏度、渗流通道长度、注浆量的增大而增大，随着浆液渗流孔径的增长而减小；推导了单相指型通道周边孔隙渗透的扩散半径关系式，提出了改善注浆效果的措施，该措施在中煤平朔井工三矿过风氧化带工程实践取得很好的效果。Abstract: For researching grouting diffusion process and it's mechanics mechanism, we conducted grouting experiments by high pressure seal grouting experiment system, and know the grouting diffusion process including channel seepage and pore penetration. We analyzed slurry pressure change in finger-shaped channel during percolation process, and obtained the results that slurry pressure loss is increased with the increasing of slurry viscosity and channel length and grouting quantity, and reduced with the increasing of channel diameter; we derived diffusion radius relationship of pore penetration in the vicinity finger-shaped channel, and proposed the measures for improving grouting effect, and get good results in the grouting project when the fully mechanized caving face passed through wind oxidation zone in Pingshuo Coal Industry Company No.1 Coal Mine.
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