In this study, 16 groups of tests were designed by the orthogonal test method, and a PU grouting material was prepared, which can be used for the construction of sealing wall in mined-out area of coal mine. The basic properties of the material were measured. Firstly, the viscosity of four groups of samples with different polyether polyol contents was measured by a dynamic rheometer. Secondly, the uniaxial compressive strength of pure slurry samples and sand-containing samples was measured by a universal testing machine. Finally, the failure process of sand-containing samples was monitored by acoustic emission equipment. Through the above research and analysis, a PU grouting material with excellent performance has been obtained. That is, when the ratio of polyether triol:polyether tetraol:catalyst:surfactant:chain extender:plasticizer is 11 : 9 : 0.5 : 1.0 : 1.2 : 6.0, PU grouting material has higher injectability and ideal compressive strength, which has been proved in grouting experiments.

中文翻译：

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基于声发射监测的聚氨酯灌浆材料断裂特性

本研究采用正交试验法设计了16组试验，制备了一种PU灌浆材料，可用于煤矿采空区封堵墙的施工。测量材料的基本性能。首先，通过动态流变仪测量了四组不同聚醚多元醇含量的样品的粘度。其次，采用万能试验机测量纯浆体样品和含砂样品的单轴抗压强度。最后，通过声发射设备监测含砂样品的破坏过程。通过以上研究和分析，获得了一种性能优良的PU灌浆材料。即聚醚三醇:聚醚四醇:催化剂:表面活性剂:扩链剂:增塑剂的比例为11:9:0时。