基于响应面法的废石-铜渣掺和比充填强度影响试验

充填料浆配比与强度在矿山准确充填过程中起决定性作用，运用两种骨料堆积密实度模型分析废石-铜渣混合比例以得出混合骨料最佳掺和比，采用BBD响应面法，对废石-铜渣进行膏体配比设计，建立了各龄期的充填体强度回归模型，研究了料浆质量浓度、水泥添加量、废石-铜渣掺和比单因素及其交互作用对不同龄期充填体强度的影响。结果表明：料浆质量浓度和废石-铜渣掺和比的交互作用对充填体强度初期形成起支撑作用，水泥添加量和废石-铜渣掺和比交互作用对中期充填体强度影响显著，料浆质量浓度和水泥添加量交互作用对后期充填体强度增长起决定性作用。建立充填物料多目标函数模型对废石-铜渣膏体配比进行优化，满足矿山生产要求。在一定程度上为矿山多元骨料的应用提供了理论指导，同时有助于矿冶固废铜渣的综合利用。

Experiment on the effect of specific filling strength of waste rock-copper slag based on response surface method

The ratio and strength of filling slurry play a decisive role in the accurate filling process of the mine. Two aggregate packing compactness models are used to analyze the mixing ratio of waste rock and copper slag to obtain the best mixing ratio of mixed aggregate, The BBD response surface method was used to design the paste proportion of waste rock copper slag, and the regression model of backfill strength at each age was established, The influences of slurry concentration, cement addition, single factor and interaction of waste rock copper slag mixing ratio on the strength of backfill at different ages were studied. The results show that the interaction between the slurry mass concentration and the ratio of waste rock to copper slag plays a supporting role in the initial strength formation of the backfill, the interaction between the cement addition amount and the ratio of waste rock to copper slag has a significant impact on the middle strength of the backfill, and the interaction between the slurry mass concentration and the cement addition amount plays a decisive role in the later strength growth of the backfill. A multi-objective function model of filling materials was established to optimize the ratio of waste rock to copper slag paste to meet the requirements of mine production. To a certain extent, it provides a theoretical guidance for the application of multiple aggregates in mines, and also contributes to the comprehensive utilization of solid waste copper slag in mining and metallurgy.