地下水封石油洞库工程的灌浆参数模拟分析

The simulation of grouting parameters of underground petroleum storage caverns project

以某深埋地下水封石油洞库为研究对象,针对裂隙岩体,采用离散单元法,选用UDEC软件,将浆液设定为宾汉姆流体模型,研究了各灌浆参数的变化对浆液渗透范围的影响。研究结果表明:增大灌浆压力,浆液的渗透范围显著增大,但在高灌浆压力阶段,更多的灌浆压力用于克服围岩的变形;岩体裂隙越密,浆液的渗透范围越大,但变化不明显;增加裂隙隙宽,浆液的渗透范围不断增加,最后趋向平稳;增加浆液的动力黏度,浆液的渗透范围不断减小,最后趋向平稳。

Taking a deep-buried underground petroleum storage caverns as the research object,the effect of different grouting parameters on the penetration distance of slurry were studied for fractured rock mass by using discrete element method and UDEC software,and setting the slurry to be a Bingham fluid model. Research results showed that： increasing the grouting pressure can increase the penetration distance of the slurry,but at the stage of high filling pressure,more grouting pressure was used to overcome the deformation of the surrounding rock; the larger the fracture density,the larger penetration distance of the slurry,but the changes was small. The penetration distance of the slurry increased with the increase of the crack width,and finally tended to be stable. The penetration distance of the slurry decreased with the increase of the slurry viscosity and tended to be stable.