(北京科技大学 土木与环境工程学院 金属矿山高效开采与安全教育部重点实验室，北京 100083)
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。
关键字: 膏体充填；阻力特性；管壁滑移；倾斜管；响应面
（Key Laboratory for High Efficient Mining and Safety in Mental Mine, Ministry of Education,
School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China）
Abstract: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.
Key words: paste backfilling; resistance characteristics; wall slip; inclined pipe; response surface
