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针对潜坝堵河也能成灾的现象,基于异重流理论导出了泥石流龙头运动方程;对泥石流龙头运动的影响因素进行了单因素分析。分析表明泥石流粘滞系数和切应力对龙头运动速度的影响不明显,绕流阻力系数对龙头运动速度的影响最大;给出了泥石流龙头在主河里的运移距离随时间的变化曲线,在此基础上给出了潜坝堵河的最小固体物质总量计算式。
Aiming at the phenomenon that the dam blocking the river can be disastrous, the equation of motion of the debris flow leader is derived based on the theory of heavy flow. The influencing factors of the movement of the debris flow are analyzed by single factor. The analysis shows that the influence of debris flow viscosity and shear stress on the faucet motion speed is not obvious, and the flow resistance coefficient has the greatest influence on the faucet motion speed. The migration distance of the debris flow faucet in the main river with time is given. Based on this, the formula of the minimum total solid matter in the dam blocking the river is given.