The novel class F fly ash-based geopolymer, largely made of fly ash from the coal solid waste, was used as a kind of grouting material in the coal and electricity-integrated mine from which the solid waste comes, for the purpose of in situ utilization of fly ash. The ratio experiment of material, designed through the orthogonal method, was used to study material properties such as fluidity and strength which are important to the application of mine grouting, and the optimal material proportioning scheme for Green Fly Ash-based grouting material is determined. It has been found out that there was serious rib spalling, roof deformation, obvious floor heave, crack development, and some water seepage in the permanent refuge chamber of the mine. Therefore, to solve these problems, a specific scheme of grouting reinforcement for the surrounding rocks of the permanent refuge chamber and roadway in this mine was designed. Through an analysis of the reinforcement effect of the cementation of surrounding rock after the grouting process, it can be concluded that the green fly ash-based polymer as grouting material can well penetrate into the cracks of the broken surrounding rock and get fully cemented with the surrounding rock and that it can reduce the deformation of the surrounding rock effectively, increase the integrity, and improve the carrying capacity of the surrounding rock. Besides, the grouting reinforcement effect of surrounding rock was verified through numerical simulation, and the grouting process design of green fly ash-based polymer mine was discussed. This study can provide a green and economical approach to the in situ utilization of fly ash which is a kind of coal solid waste.

中文翻译：

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新型F级粉煤灰基地质聚合物及其在煤矿注浆中的应用

新型F类粉煤灰基地质聚合物主要由煤固体废弃物中的粉煤灰制成，被用作原煤的煤电一体化矿井中的一种灌浆材料。粉煤灰的利用。通过正交试验设计材料配比实验，研究了矿浆灌浆应用中重要的材料性能，如流动性和强度，确定了粉煤灰基灌浆材料的最佳配比方案。已经发现，在矿山的永久避难所中存在严重的肋骨剥落，屋顶变形，明显的地面隆起，裂缝发展以及一些渗水现象。因此，要解决这些问题，设计了该矿永久避难所和巷道围岩注浆加固的具体方案。通过对灌浆后围岩胶结的加固效果分析，可以得出结论：粉煤灰基聚合物作为灌浆材料可以很好地渗透到破碎的围岩裂缝中，并与胶结剂充分固结。可以有效减少围岩的变形，增加整体性，提高围岩的承载能力。此外，通过数值模拟验证了围岩的注浆加固效果，并讨论了粉煤灰基聚合物矿的注浆工艺设计。