摘要
为研究膏体管道输送阻力特性,针对膏体管道输送的结构流特点,将管道内膏体流区划分为柱塞流动区、剪切流动区和滑移流动区。根据流体力学理论建立考虑管壁滑移效应的膏体管道输送阻力模型,推导基于倾斜管试验的膏体流变参数计算方式,通过测定倾斜管不同倾斜角度α下的管道流速v计算管道屈服应力τ0和塑性粘度η,并在此基础上自制试验装置。针对谦比希铜矿充填物料基本特性,通过正交试验研究浓度、灰砂比和尾废比对管道摩擦阻力的影响,并根据响应面分析多因素之间的交互作用,得到各因素对管道摩擦阻力的影响顺序由大到小依次为灰砂比、尾废比、浓度。研究结果是膏体管道输送阻力特性理论与实践研究的有力补充。
In order to research the resistance behavior of paste backfill pipeline,the paste was divided into three parts:plug flow,shear flow and wall slip flow based on the structure-flow.And a pipeline resistance model was built considering the effect of wall slip.The calculating methods of rheological parameters were inferred from inclined-tube experiments through calculating the yield stress and plastic viscosity by measuring inclined angles in different tubes,and a pilot apparatus was fabricated.Focusing on the basic characters of backfill material in Chambishi copper mine,a orthogonal test was conducted to investigate the effect of solid concentration,cement-sand ratio and tailing-waste ratio for pipeline resistance.After analyzing interaction effect of different factors by response surface methodology,the order of effect from big to small are cement-sand ratio,tailing-waste ratio,concentration.The result is the powerful complement for paste pipeline resistance and research.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2016年第1期180-187,共8页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(51374034
51374035)
国家"十二五"科技支撑计划项目(2012BAB08B02)~~
关键词
膏体充填
阻力特性
管壁滑移
倾斜管
响应面
paste backfilling
resistance characteristics
wall slip
inclined pipe
response surface
