基于回归分析的尾砂膏体充填材料试验研究
Experimental Study on Tailing Paste Filling Material Based on Regression Analysis
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摘要: 以矿用尾砂、胶固粉为充填材料，采用正交试验方法对不同质量浓度、粉砂比和搅拌时间的料浆分别进行流动度、泌水率、充填体单轴抗压强度的试验研究，并采用极差分析探究了质量浓度、粉砂比和搅拌时间对膏体充填材料输送性能的影响，通过多元线性回归分析方法得出充填体抗压强度的回归函数。试验结果表明：对尾砂充填体强度最重要的影响因素是胶固粉与尾砂的比例关系，粉砂比越大，强度越强；其次为充填料浆浓度，在保持粉砂比不变条件下，提高料浆浓度亦有利于提高充填体强度；最后是养护时间，充填体强度随时间增加，最终维持在1个稳定值。Abstract: Use tailings and cementitious powder as filling material, experimental study of fluidity, bleeding rate and filling body uniaxial compressive strength of slurry with different mass concentration, silty sand ratio and stirring time is researched by using orthogonal experiment method, the effect of mass concentration, silty sand ratio and stirring time on transportation performance of paste filling material is explored by range analysis, and we obtain the regression function of compressive strength of filling body through multivariate linear regression analysis. The experimental results show that the proportion relation of cementitious powder and tailings is the most important influence factor of strength of tailings filling body, the larger the silty sand ratio, the higher the strength; the next factor is filling slurry, increasing the slurry concentration can also improve the strength of the filling body as the silty sand ratio is constant; the last factor is curing time, with the increase of time, the strength of the filling body increases, and the final value will maintaine a stable value.
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Keywords:
- paste filling /
- orthogonal test /
- regression analysis /
- compressive strength /
- fluidity /
- bleeding rate
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