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为了探究不同硫酸盐含量铅锌尾砂在不同水泥掺量条件下充填体的抗压强度,以硫酸亚铁溶液代替实验用水,开展4组浓度硫酸亚铁溶液(0、5 000、10 000、20000mg· L-1)及3组灰砂比(1/6、1/8、1/10)铅锌尾砂胶结充填体早期单轴抗压强度(3、7、14和28 d)实验.结果表明:不同灰砂比充填体3d抗压强度差别不大,灰砂比1/6能够显著提高充填体7d以后的强度,28 d所有试件抗压强度均能达到1.15 MPa以上;养护龄期为3d时,硫酸亚铁的絮凝作用会减缓充填体脱水速率,导致高硫酸亚铁试件抗压强度较低;养护龄期为7～28 d时,充填体试件的抗压强度随硫酸亚铁含量的增高先增大后减小,硫酸盐浓度为5000～10000 mg· L-1的试件抗压强度最高;方差分析表明,硫酸亚铁和灰砂比对充填体抗压强度均有显著影响,灰砂比对抗压强度的影响高于硫酸亚铁.“,”To investigate the effects of sulfate corrosion and the cement-tailings ratio on the unconfined compressive strength (UCS) of lead-zinc tailings cemented paste backfill (CPB),artificial solutions with four different sulfate concentrations (0,5 000,10 000,and 20 000 mg · L-1) were selected to prepare C PB with three different cement-tailings ratios (1/6,1/8,and 1/10).The UCS of specimens with four different curing periods (3,7,14,and 28 days) was tested and analyzed.The results indicated that there was no significant difference in the UCS between different cement-tailings ratios after 3 curing days.The specimens with high cement-tailings ratios (1/6) had high UCS values after 7 curing days,and the UCS values of all specimens were higher than 1.15 MPa after 28 curing days.The specimens with high sulfate concentrations had relatively low UCS values after 3 curing days,which implies that the dehydration rate is reduced by the sulfate flocculation effect.With increasing sulfate concentration,the UCS values of all specimens which curing time longer than 3 days decreased followed by initially increasing,and the specimens had the highest UCS values when sulfate concentration was between 5 000 and 10 000 mg · L-1.The results of variance analyses revealed that the UCS of CPB is significantly affected by the cement-tailings ratio and sulfate content,with the former factor having a greater influence.