【摘要】 初选聚羧酸、三聚氰胺、萘系和木质素磺酸钙4种常见类型的减水剂，开展不同类型减水剂在不同掺量下的全尾砂充填料浆特性试验，研究各类减水剂对充填料浆屈服应力、塑性黏度、泌水率及充填体强度等的影响规律，综合分析了充填料浆的工作性能参数，结合减水剂的成本，优选了减水剂类型和掺量。研究表明：1)减水剂的掺入可以降低全尾砂充填料浆的屈服应力、塑性黏度；2)适当掺量的减水剂可以降低全尾砂充填料浆的泌水率，而低掺量的减水剂反而会增加泌水率；3)减水剂的掺入会降低充填体早期强度，而对充填体中期强度影响相对较小，不同类型减水剂对充填体早期强度影响不同；4)综合比较，优选三聚氰胺减水剂，掺量为0.2%。更多还原

【Abstract】 Four common types of water reducers—polycarboxylate(PCE), melamine-based, naphthalene-based, and calcium lignosulfonate—were initially selected. Experiments were conducted on the properties of full tailings filling slurry incorporating these different water reducers at varying dosages. The influence patterns of each type of water reducer on the slurry’s yield stress, plastic viscosity, bleeding rate, and the strength of the hardened backfill were investigated. The workability parameters of the filling slurry were comprehensively analyzed, and the optimal water reducer type and dosage were selected considering both performance and cost. The research indicates that: 1)The addition of water reducers can decrease the yield stress and plastic viscosity of the full tailings filling slurry. 2) An appropriate dosage of water reducer can significantly reduce the bleeding rate of the slurry, while a low dosage may instead increase it. 3) The incorporation of water reducers reduces the early strength of the hardened backfill but has a relatively smaller impact on its medium-term strength; different types of water reducers affect early strength differently. 4) Based on comprehensive comparison, the melamine-based water reducer at a dosage of 0.2% is the optimal choice.更多还原