尾砂充填料浆流变性能模型与试验研究

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尾砂充填料浆流变性能模型与试验研究

蔡嗣经¹,黄刚¹,吴迪²,张亚东¹

1. 北京科技大学
2. 中国矿业大学（北京）

收稿日期:2013-11-27 修回日期:2013-12-25 发布日期:2014-09-12
通讯作者: 黄刚

Experimental and Modeling Study on the Rheological Properties of Tailings Backfill

Received:2013-11-27 Revised:2013-12-25 Published:2014-09-12

摘要/Abstract

摘要： 以地下矿山尾砂充填料为研究对象，试验研究与理论分析相结合的方法，利用R/S+流变仪和岩石力学试验机对充填料浆的流变性能进行试验研究。引入Papanastasiou粘塑性流体模型来表征尾砂充填料浆的粘度和切应力变化过程。研究结果表明：该粘塑性流体模型预测的结果和试验结果相吻合，因此可用于理论分析计算；得到不同的压力增长指数下切应力-切变速率曲线；尾砂充填料浆的粘度和屈服应力随料浆质量浓度的增加而增大；同一质量浓度下，胶结尾砂的粘度和屈服应力比全尾砂大。通过对充填料浆流变性能的研究，为矿山充填设计提供了理论和试验依据。

关键词: 充填采矿法, 尾砂充填料, 粘塑性流体, 屈服应力, 流变性能

Abstract: Taking backfill material of underground mine as the object of study, this paper conducts the research on its rheological properties and strength characteristics by using the R/S+ rheometer and rock mechanics testing machine with the method of experiment and theory analysis. And the visco-plastic fluid model of Papanastasiou was introduced to analyze the changing progress of viscosity and shear stress of tailings backfill. The results show that the calculated results of this model which were identical with the experimental results were verified for theoretical calculating, and the curve of shear stress-shearing rate at the different stress growth parameter was gotten; the viscosity and yields stress of backfilling develop with the increase of its mass concentration; the viscosity and yields stress of cementing tailings were higher than whole tailings at the same mass concentration. According to the research of rheological properties of tailings backfill, the results are useful for designing filling station in mine.

Key words: mining with backfill, tailings fill, visco-plastic fluid, yield stress, rheological properties

蔡嗣经黄刚吴迪张亚东. 尾砂充填料浆流变性能模型与试验研究[J]. .

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