In order to ensure the dehydration effect of the whole tailings backfill, a dehydration model of the whole tailings backfill was established based on hydrodynamics on the basis of satisfying certain assumptions, and the theoretical solution was carried out. The control variable method is used to study the variation of dewatering capacity with dewatering depth and radius, and the applicability of the dewatering model is verified by experiments. The results show that the dewatering capacity increases with the increase of dewatering radius and decreases with the increase of dewatering depth by a quadratic polynomial. By comparing the experimental values with the theoretical ones, it is found that the variation law of the dewatering capacity with radius is the same and increases with the increase of dewatering depth. The reason is that the content of fine particles in the unclassified tailings is large and the filter hole on the branch pipe is blocked under the action of the hydrodynamic force. Therefore, the dewatering effect of the new root-like dehydration tube can be guaranteed by using the branch pipe arranged at the full height of main dewatering pipe. The dehydration model is modified by the test results to ensure the applicability.

中文翻译：

---

全尾矿充填浆脱水流体动力学模型研究

为保证尾矿充填整体脱水效果，在满足一定假设的基础上，基于流体动力学建立了尾矿充填整体脱水模型，并进行了理论求解。采用控制变量法研究了脱水能力随脱水深度和半径的变化规律，并通过实验验证了脱水模型的适用性。结果表明，脱水能力随脱水半径的增加而增大，随脱水深度的增加呈二次多项式减小。通过实验值与理论值的对比发现，脱水能力随半径的变化规律相同，并随着脱水深度的增加而增大。原因是未分级尾矿中细粒含量大，支管上的滤孔在水动力的作用下被堵塞。因此，采用布置在主脱水管全高处的支管，可以保证新型根状脱水管的脱水效果。脱水模型根据试验结果进行修正，以保证适用性。