(北京科技大學 土木與環(huán)境工程學院 金屬礦山高效開采與安全教育部重點實驗室，北京 100083)
摘 要: 為研究膏體管道輸送阻力特性，針對膏體管道輸送的結(jié)構(gòu)流特點，將管道內(nèi)膏體流區(qū)劃分為柱塞流動區(qū)、剪切流動區(qū)和滑移流動區(qū)。根據(jù)流體力學理論建立考慮管壁滑移效應(yīng)的膏體管道輸送阻力模型，推導基于傾斜管試驗的膏體流變參數(shù)計算方式，通過測定傾斜管不同傾斜角度α下的管道流速v計算管道屈服應(yīng)力τ0和塑性粘度η，并在此基礎(chǔ)上自制試驗裝置。針對謙比希銅礦充填物料基本特性，通過正交試驗研究濃度、灰砂比和尾廢比對管道摩擦阻力的影響，并根據(jù)響應(yīng)面分析多因素之間的交互作用，得到各因素對管道摩擦阻力的影響順序由大到小依次為灰砂比、尾廢比、濃度。研究結(jié)果是膏體管道輸送阻力特性理論與實踐研究的有力補充。
關(guān)鍵字: 膏體充填；阻力特性；管壁滑移；傾斜管；響應(yīng)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
