动水条件下宾汉体浆液在倾斜裂隙中运移规律

Migration Law of Bingham Slurry in Inclined Fractures under Water Moving Conditions

通过理论推导建立了考虑浆液自重的倾斜裂隙动水注浆扩散模型,通过模型试验分析了动水流速及裂隙倾角对扩散规律的影响,验证了扩散模型的合理性。结果表明,不同工况下浆液的扩散形态基本都是从圆形到椭圆形再到U形;随着裂隙倾角增加,浆液形态中圆形持续时间逐渐缩短直至消失,椭圆形持续时间变长,逆水方向和横向扩散距离减小,扩散形态略显修长;水速越高浆液形态变化耗时越短,逆水方向和横向扩散距离越小,浆液的最终形态越修长。

A diffusion model for inclined fissure dynamic water injection considering the self weight of the slurry was established through theoretical derivation.The influence of dynamic water flow velocity and fissure inclination angle on the diffusion law was analyzed through model experiments,and the rationality of the diffusion model was verified.The results show that the diffusion morphology of the slurry under different operating conditions is basically from circular to elliptical and then to U-shaped;As the inclination angle of the crack increases,the duration of the circular shape in the slurry gradually shortens until it disappears,the duration of the elliptical shape becomes longer,the reverse water direction and lateral diffusion distance decrease,and the diffusion shape appears slightly elongated;the higher the water speed,the shorter the time required for the change of slurry morphology,the smaller the reverse water direction and lateral diffusion distance,and the more slender the final morphology of the slurry.