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在不同水流流速条件下,对单一裂隙动水化学注浆浆液扩散规律和注浆堵水效果进行了一系列试验。结果表明,水流流速越大,浆液沿逆水流方向和垂直水流方向的扩散距离、固结体面积和堵水率越小,堵水效果越差;水流流速对逆水流方向扩散距离的影响程度大于对垂直水流方向扩散距离的影响程度。采用理论模型计算了水流流速对浆液沿水流方向和逆水流方向扩散的影响,表明水流速度对逆水流扩散距离影响大,逆水流扩散距离随流速增大降低明显。在动水条件下,为了获得好的注浆效果,注浆孔布置应考虑水流流速的影响,在水流速率大时要减小注浆孔的间距。
Under different water flow rates, a series of experiments were carried out on the diffusion rules of grouting and the effect of grouting and plugging on single fracture hydrodynamic grouting slurry. The results show that the larger the flow velocity is, the longer the diffusion distance, the smaller the consolidation area and the water plugging rate are, and the worse the water plugging effect is. The influence of water flow velocity on the distance of reverse water flow is greater than The degree of influence on the vertical diffusion of water flow direction. The theoretical model was used to calculate the effect of water flow velocity on the diffusion of slurry along the water flow direction and the counterflow direction. It is shown that the water flow velocity has a great influence on the reverse flow diffusion distance, and the reverse water flow diffusion distance decreases obviously with increasing flow velocity. Under dynamic water conditions, in order to obtain good grouting effect, the layout of grouting holes should consider the influence of water flow velocity, and the grouting hole spacing should be reduced when the water flow rate is large.