Filling material and using method thereof

The invention relates to the technical field of mining industry mining filling, and concretely discloses a filling material and a using method thereof. The filling material comprises 8-10% of a cementing agent, 25-30% of fly ash, 25-30% of coal gangue, 30-35% of aeolian sands and 1-5% of plant fibers; and the cement includes, by mass, 55-60% of a modified mineral powder, 20-25% of composite gypsum, 10-12% of a Portland cement clinker and 8-10% of a compound admixture. A paste formed by the filling material in the use process has the advantages of good cohesive force, good stability, low bleeding rate, high shear resistance, high compressive strength and low raw material cost, and solves the problem of difficulty in drawing of raw materials for the filling material in the aeolian sand area. 本发明涉及矿业开采充填技术领域，具体公开一种充填材料及其使用方法，所述充填材料胶结剂8-10％，粉煤灰25-30％，煤矸石25-30％，风积沙30-35％，植物纤维1-5％；所述胶结剂包括以下质量百分比的组分：改性矿粉55-60％，复合石膏20-25％，硅酸盐水泥熟料10-12％，复合型外加剂8-10％。本发明充填材料使用过程中形成的膏体粘聚力和稳定性好、泌水率低、抗剪切和抗压强度高，原料成本低，解决风积沙地区的充填材料的原料取材困难的问题。