【作者】 朱明听；

【导师】 张庆松；

【作者基本信息】 山东大学 ， 岩土工程， 2013， 硕士

【摘要】 突涌水是地下工程建设与运营过程中的主要地质灾害,具有突发性高、致灾能力强、灾后处置困难等显著特点。因此,开展注浆扩散和地下水封堵机理研究,并发展相对应的突涌水封堵技术是地下工程水害治理的重要研究内容。通过理论分析、模型试验与数值模拟,深入研究了不同流型浆液在不同流场环境下扩散运移规律,分析其扩散形态与注浆压力分布规律,研究内容及主要成果如下：(1)基于多个地下工程突涌水案例,分析了致灾水源、导水通道的具体形式及其突涌水灾害演化规律,将地下工程水害划分为节理裂隙型突涌水、富水断层破碎带突涌水、管道型突涌水及微孔隙与微裂隙型突涌水,针对其具体特征提出科学合理的处置原则。(2)研究了牛顿流体与宾汉姆流体在单一平板裂隙内流量与压力梯度关系,建立了单一平板裂隙条件下的注浆扩散运移方程,得出注浆压力计算方法并应用数值模拟对牛顿流体扩散运移方程进行了验证。(3)采用理论分析与数值模拟方法,针对时变性与非时变性浆液,研究了静水注浆、动水注浆、引流注浆过程中,浆液粘度、浆液流型、注浆速度、裂隙隙宽等参数对浆液扩散形态与注浆压力分布的影响,获得了不同浆液流型与不同流场环境条件下浆液扩散形态及注浆压力分布规律。(4)研究了浆液扩散系数与水流速度对于浆水混合区域的影响,得出浆水混合区域宽度与浆液扩散系数的平方根成正比,与水流速度的平方根成反比,并将浆液扩散系数与水流速的乘积作为注浆设计中浆液选型的定量化指标。更多还原

【Abstract】 Water inrush disaster which is the main geological disaster during the construction and operation of underground engineering has high Abruptness、serious damage and the handling of post-disaster is difficulty。Through theoretical analysis, model test and numerical simulation, the grout diffusion law of different type slurry in different flow conditions was studied; The diffusion forms, pressure distribution law was analyzed. The research contents and the main results are as follows:(1)This paper firstly analyses the various hazard sources and water inrush disaster evolution rules, then take into account the specific forms of water channel, classify water inrush disaster into three main type:the structural water gushing, reveal gushing and contact zone water gushing, based on the main three type10subgroups are further divided and according to each specific characteristics, puts forward the science handling principle.(2)Study on the relationship between Newton fluid and Bingham fluid flow in a single flat crack and pressure gradient. The diffusion control equation and the calculation method of grouting pressure is established under the condition of single plate fracture grouting, and the Newton fluid diffusion control equation was validated by numerical simulation.Based on numerical simulation study the evolution of Grout diffusion form and grout pressure effected by the viscosity, grout rate, fracture width and grout type Given the contrast analysis of slurry diffusion morphology evolution characteristics and grouting pressure changes of different types of slurry flowing in single fracture under different flow field, proposed the selection of grouting slurry and parameter design principle aimed at specific flow field.(4) The effect of grout diffusion coefficient and flow velocity on mixing width of water and slurry was researched. The mixing region width is proportional to the square root of the grout diffusion coefficient and is inversely proportional to water velocity. The product of grout diffusion coefficient and water velocity is used as a quantitative index of grouting design of grouting slurry selection更多还原