To study the evolution law of the discharge pathway for the old goaf water in the Datong mining area, a new fluid-solid coupling similar material was developed based on the fluid-solid coupling similarity theory. In the developed similar material, sand and barite powder were used as aggregate, polyurethane and white portland cement as binder, and water and silicone oil as regulator. The effects of different proportions on mechanical properties and water physical properties of materials were obtained through the experiments. The results show that the strength of the developed material is mainly controlled by cement and polyurethane, the hydrophilicity is affected by silicone oil, and the permeability coefficient is mainly affected by cement and polyurethane. For grouting agent, cement can realize the overall control function, and polyurethane can realize the local control in a certain range. As an ideal fluid-solid coupling similar simulation material, the developed material can simulate rock mass with different permeability and different strength. Besides, this material has been successfully applied to an experimental study on the mechanism of old goaf water discharge in an extra-thick coal seam in the Datong mining area, and the development and evolution characteristics of the old goaf water discharge pathway is obtained. This new kind of fluid-solid coupling similar material is developed based on the fluid-solid coupling similarity theory, which is suitable for revealing the evolution law of discharge pathway for the old golf water in the Datong mining area.

中文翻译：

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流固耦合相似材料在老采空区排水试验中的开发与应用

为研究大同矿区老采空区水排放路径演化规律，基于流固耦合相似理论研制了一种新型流固耦合相似材料。在开发的类似材料中，沙子和重晶石粉作为骨料，聚氨酯和白色硅酸盐水泥作为粘合剂，水和硅油作为调节剂。通过实验得到了不同配比对材料力学性能和水物理性能的影响。结果表明，所开发材料的强度主要受水泥和聚氨酯控制，亲水性受硅油影响，渗透系数主要受水泥和聚氨酯影响。对于注浆剂、水泥可实现整体控制功能，聚氨酯可在一定范围内实现局部控制。作为一种理想的流固耦合相似模拟材料，所开发的材料可以模拟不同渗透率和不同强度的岩体。此外，该材料已成功应用于大同矿区特厚煤层老采空区排水机理的实验研究，获得了老采空区排水通路的发育演化特征。这种新的流固耦合相似材料是基于流固耦合相似理论开发的，适用于揭示大同矿区老高尔夫水排放路径演化规律。开发的材料可以模拟不同渗透性和不同强度的岩体。此外，该材料已成功应用于大同矿区特厚煤层老采空区排水机理的实验研究，获得了老采空区排水通路的发育演化特征。这种新的流固耦合相似材料是基于流固耦合相似理论开发的，适用于揭示大同矿区老高尔夫水排放路径演化规律。开发的材料可以模拟不同渗透性和不同强度的岩体。此外，该材料已成功应用于大同矿区特厚煤层老采空区排水机理的实验研究，获得了老采空区排水通路的发育演化特征。这种新的流固耦合相似材料是基于流固耦合相似理论开发的，适用于揭示大同矿区老高尔夫水排放路径演化规律。该材料已成功应用于大同矿区特厚煤层老采空区排水机理的实验研究，获得了老采空区排水通路的发育演化特征。这种新的流固耦合相似材料是基于流固耦合相似理论开发的，适用于揭示大同矿区老高尔夫水排放路径演化规律。该材料已成功应用于大同矿区特厚煤层老采空区排水机理的实验研究，获得了老采空区排水通路的发育演化特征。这种新的流固耦合相似材料是基于流固耦合相似理论开发的，适用于揭示大同矿区老高尔夫水排放路径演化规律。