大红山铁矿细粒级尾砂胶结充填材料充填强度试验研究

为探索大红山铁矿细粒级尾砂胶结充填材料充填强度，结合大红山铁矿实际需求，对细粒级尾砂胶结充填材料应用及充填体强度进行试验研究。试验结果表明，采用新型胶结材料代替传统硅酸盐水泥，分级尾砂胶结充填时，灰砂比1∶10时即能满足充填采矿工艺要求；全尾砂胶结充填时，新材料胶结灰砂比1∶8的28 d抗压强度与分级尾砂水泥胶结灰砂比1∶4的28 d抗压强度相当，能有效降低充填成本，具有良好的经济效益和环保效益。

Application and Filling Strength Test of Fine-Grained Tailings Cement Filling Material in Dahongshan Iron Mine

Combined with the actual demand of Dahongshan Iron Mine,the application of the fine-grained tailings cementing filling material and the strength of the filling body are tested.The test results show that the new cementing material replaces the traditional Portland cement,and the classified tailings are cemented and filled with ash.When the cement sand ratio is 1∶10,it can meet the filling mining process requirements;when the full tailings are cemented,the new material cemented sand and sand ratio is 1∶8,28 d compressive strength and graded tailings cement cemented sandstone ratio 1∶4.28 d compressive strength of the sky is equivalent,which can effectively reduce the filling cost and has good economic and environmental benefits.