The study of flow behaviour of water-sand mixtures in fractured rocks is of great necessity to understand the producing mechanism and prevention of water inrush and sand gushing accidents. A self-developed seepage test system is used in this paper to conduct laboratory experiments in order to study the influence of the particle size distribution, the void ratio, and the initial mass of Aeolian sand on the flow behavior. It is concluded that the water flow velocity is insensitive to the initial mass of the Aeolian sand but increases with the power exponent in the Talbot formula and the specimen height. The outflow of the Aeolian sand increases with the power exponent in the Talbot formula, the specimen height, and the initial mass of the Aeolian sand. Besides, the outflow of the Aeolian sand changes exponentially with the water flow velocity. Finally, it is found that the fractured specimen has a maximum sand filtration capacity beyond which the outflow of the Aeolian sand significantly increases with the initial mass of the Aeolian sand.

研究裂隙岩石中水沙混合物的流动行为，对于了解水的产生机理和预防突水，喷砂事故的发生具有十分必要的意义。为了研究粒径分布，空隙率和风沙的初始质量对流动特性的影响，本文使用了自行开发的渗流测试系统进行实验室实验。结论是，水流速度对风沙的初始质量不敏感，但随着塔尔伯特公式和标本高度中的幂指数的增加而增加。风沙的流出量随塔尔伯特公式中的幂指数，标本高度和风沙的初始质量而增加。此外，风沙的流出量随水流速度呈指数变化。