岩溶区排泥库泥浆深层泄漏机理

受喀斯特地貌及动水环境季节性变化影响,岩溶区排泥库底部泄漏事故时有发生,泄漏点探测成为控制灾害影响程度的关键。为此,通过灰色关联分析多参数对泥浆泄漏渗流力的影响,认为其中泥浆密度与流速对其渗流力影响较大,建立了泥浆密度、含水量、流速与泥浆渗流力的多元线性回归方程;并进一步建立了不同泄漏孔口大小、含水量和动力黏度条件下的泥浆泄漏数值模型,结果表明:泥浆含水量、动力黏度对泄漏影响半径影响不大,而泄漏孔口大小与泄漏影响半径关系较为密切,水平影响半径平均为泄漏孔口半径的4.61倍,竖直影响半径平均为泄漏孔口半径的5倍。

Study on Deep Leakage Mechanism of Tailing Pond in Karst Area

Affected by the karst geomorphology and seasonal changes in the hydrodynamic environment, leakage accidents at the bottom of tailing pond in karst area occur frequently, leak point detection becomes the key to control the degree of disaster impact. This paper uses the grey correlation method to analyze the influence of multi-parameters on the seepage force of mud leakage. It is believed that the mud density and flow velocity have a great influence on the seepage force, and established a multiple linear regression equation between mud density, moisture content, velocity and mud seepage force. Furthermore, the numerical models of mud leakage under different leakage orifice sizes, moisture content, and dynamic viscosity were established. The numerical simulation results show that the mud moisture content and dynamic viscosity have little effect on the leakage influence radius, and the leakage orifice size has a close relationship with the leakage influence radius. The average horizontal influence radius is 4.61 times the leakage orifice radius, and the average vertical influence radius is 5 times the leakage orifice radius.