基于响应面法的煤矸石充填料浆流变特性实验研究OACSTPCD

To ensure the gangue slurry met the process requirements for pipeline transportation,its fluidity had been studied.Coal gangue from the Yulin Yuandatan mine had been prepared into slurries with different mass fractions for conducting rheological characteristic experiments.The Box-Behnken Design test and response surface method had been utilized to analyze the influence of three factors:the gangue solid mass fraction,particle gradation,and resting time on the rheological characteristics of the gangue filling slurry.The optimal gangue slurry ratio that had been derived from the experimental analysis was as follows:a 72%mass fraction of solids,with the particle gradation consisting of 30%in the range of 4.75～1.18 mm,40%in the range of 1.18～0.425 mm,10%in the range of 0.425～0.075 mm,and 20%less than 0.075 mm.The yield shear stress of the slurry had ranged from 103.02 to 131.645 Pa,and the plastic viscosity had ranged from 0.54 to 0.64 Pa·s.It had been observed that with the increase in the static time of the solid material settlement,the increase in this ratio was minimal.