动水流速对浆液留核稳定性的影响研究

Influence of dynamic water velocity on the stability of slurry deposition zone

文章通过有限元数值模拟和室内动水注浆试验,分析了水流速度对单裂隙注浆留核稳定性的影响。研究结果表明:动水绕流后会产生典型的尾迹流现象,初始流速越大产生的尾迹流越混乱,对留核产生的扰动越大;当初始流速大于等于0. 1m/s时,尾迹流呈紊流流态,对留核稳定性影响较大,当初始流速小于0. 1m/s时,尾迹流呈层流流态,对留核稳定性影响较小。

Water flow velocity is a key parameter in the design of dynamic water grouting,which is the main factor affecting the grouting effect of hydrodynamic water. In this paper,the effects of water flow velocity on the stability of single-fracture grouting slurry deposition zone are analyzed using finite element numerical simulation and indoor dynamic water grouting test. The results show that the typical wake flow phenomenon occurs after the moving water flows. The larger the initial flow velocity,the more chaotic the wake flow is,and the greater the disturbance to the slurry deposition area. When the initial flow velocity is greater than or equal to 0. 1 m/s,the wake flow is in a turbulent flow regime and has a great influence on the stability of the slurry deposition zone. When the initial flow velocity is less than 0. 1 m/s,the wake flow is in a laminar flow regime,which has little effect on the stability of the slurry deposition zone.