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通过理论推导建立了单一裂隙动水注浆扩散模型,用计算机对单一裂隙动水注浆扩散模型进行编程和分析,试验验证该注浆扩散模型是合理的。研究结果表明,单一裂隙动水注浆在注浆前期浆液扩散面积呈圆形而在注浆后期浆液扩散面积呈椭圆形;浆液扩散半径与浆液黏度成反比,与裂隙开度和注浆压力成正比;水流流动有利于浆液沿顺水流方向扩散而抑制浆液沿逆水流方向扩散;水流流速增大或减小到一定程度时浆液扩散半径受水流流速的影响程度将逐渐减小;水流流动对逆水流方向扩散半径的影响程度大于顺水流方向扩散半径的影响程度;浆液扩散半径受水流流速影响最大,受裂隙开度影响次之,受注浆压力和浆液黏度的影响相对较小。
Through the theoretical derivation, a single fracture hydrodynamic grouting diffusion model was established, and a single fracture dynamic grouting diffusion model was programmed and analyzed by computer. The experimental verification of the grouting diffusion model is reasonable. The results show that the grout diffusion area of a single fracture hydrodynamic grouting is round in the early grouting stage and the diffusion area of the grout is oval in the late stage of grouting. The diffusion radius of the grout is inversely proportional to the viscosity of the grout, The water flow is conducive to the slurry along the flow direction of diffusion and inhibit the flow of water along the counterflow direction of diffusion; when the flow rate increases or decreases to a certain extent, the diffusion radius of the slurry flow rate will be gradually affected by the degree of decline; The effect of diffusion radius in water flow direction is greater than that in water flow direction. The diffusion radius of slurry is affected most by flow velocity, followed by fracture opening, and is relatively less affected by grouting pressure and slurry viscosity.