中文摘要：

为使充填体达到所需强度，采用胶固粉代替水泥作为胶凝材料，以克服传统水泥在充填过程中表现出的早期强度低、成本高等缺点。利用吉林某铁矿的全尾砂进行了一系列的充填配合比试验。试验分别采用水泥及胶固粉单独作为充填胶凝材料，改变其掺量，并测量充填体的28d单轴抗压强度。试验结果表明：采用胶固粉代替水泥作为充填胶凝材料可使充填体的28d单轴抗压强度提高3～5倍，且胶固粉掺量每增加3％可使充填体的28d单轴抗压强度提高4-9MPa。充填体强度与胶固粉掺量和料浆浓度成正比，可通过适度减少胶固粉掺量而提高浓度的方法优化充填体力学性能，并有效降低生产成本，提高经济效益。

英文摘要：

In order to make th backfill body meet the required strength to ensure safe mining,ground supporting and en- vironmental conservation, the cemented powder was used to replace the traditional Portland cement, which is known for poor strength at early age and high costs in backfill process. A series of mixing proportion experiments were conducted with full rail- ings from an iron mine in Jilin. The two types of binder, the cemented powder and the ordinary Portland cement, were used re- spectively with different dosages to test the 28 d uniaxial compressive strength （UCS） of their backfill samples. The results showed that the 28 d UCSs of the samples made from the cemented powder were observed to be 3 ~ 5 times of that of samples made from ordinary Portland cement. With each growth of 3% in binder dosage, the 28 d UCSs of the samples made from the cemented powder, which is proportional to the binder dosage and mass concentration, had an increase of 4 ~ 9 MPa. Therefore, a better mechanical property can be gained by slightly decreasing binder dosage and increasing slurry concentration, which con- sequently will contribute to lower producing costs and improving the economic benefits.