高水膨胀材料用于煤矿充填开采中流变性探究

Tht Rheological Properties Of The High Water Swelling Material Mixture

煤矿充填开采一般使用两趟专用管路输送到工作面然后进行混合,来充填工作面[1-2]。以粉煤灰和水泥为主料的高水混合充填[3]材料在一趟管道输送过程的流变特性是确定高水材料在管道中摩擦阻力的关键。由于混合物在管道输送过程中发生化学反应生成钙矾石[4],使得计算其在管道中的摩擦阻力较为困难[5]。本文通过美国Brookfield公司生产的R/S Plus流变仪确定复合流的各项参数及其在流动过程中符合的流体力学规律,初步探索出随着实验时间的改变混合充填材料属于不同流体模型、其表观粘度随着时间的增加有不断上升的趋势。

coal mining generally use two special filling line to the face, and then mixed to filling face[1-2]. Mixed with fly ash and cement as main ingredient of high water material filling[3]during a trip to the pipeline conveying of rheological properties is to determine the key of the high water material friction in the pipeline. This article by Brookfield companies in the United States production of R/S Plus rheometer composite flow of various parameters and conform to the fluid mechanics in the process of flow rules, a preliminary explore with the change of the experimental time mixed filling materials belong to different fluid model, its apparent viscosity with the increase of time has a rising trend.