In order to study the different mix proportions on rheological properties of cemented coal gangue backfill (CGB). Firstly, by single-factor test, the appropriate dosage ranges of mass concentration, fly ash content and fine gangue ratio were determined. Then on this basis, by response surface methodology, the quadratic polynomial regression models of yield stress and plastic viscosity were constructed respectively. The results show that the rheological model of fresh CGB accorded with rheological behavior of the Bingham fluid. With the increase of mass concentration, the yield stress of fresh CGB increases significantly. With the increase of fly ash content, the plastic viscosity of fresh CGB increase significantly. With the increase of the fine gangue ratio, the yield stress of fresh CGB decreases first and then increases, and the plastic viscosity increases slowly. This study will provide theoretical support for practitioners to predict the rheological properties of fresh CGB with different material compositions, and optimize the pumping performance in order to guide the engineering application more accurately.

为研究不同配比对胶结煤矸石充填体（CGB）流变特性的影响。首先，通过单因素试验，确定合适的质量浓度、粉煤灰含量和细矸石比的投加量范围。然后在此基础上，通过响应面法，分别构建了屈服应力和塑性黏度的二次多项式回归模型。结果表明，新鲜CGB的流变模型符合宾汉流体的流变行为。随着质量浓度的增加，新鲜CGB的屈服应力显着增加。随着粉煤灰含量的增加，新鲜CGB的塑性粘度显着增加。随着细脉石比的增加，新鲜CGB的屈服应力先减小后增大，并且塑性粘度缓慢增加。该研究将为从业者预测不同材料成分的新鲜CGB的流变特性，优化泵送性能以更准确地指导工程应用提供理论支持。