(1. 北京科技大學 土木與資源工程學院，北京 1000083；
2. 金屬礦山高效開采與安全教育部重點實驗室，北京 100083)
摘 要: 為探究不同濃度下的尾礦膏體流變特性行和管輸阻力計算模型，在實驗室開展了不同料漿濃度的尾礦膏體流變試驗及坍落度試驗。結(jié)果表明：料漿的屈服應力和塑性黏度隨著濃度的增加均呈不斷增大的趨勢；結(jié)合模型的擬合結(jié)果可知，屈服應力隨著料漿濃度(質(zhì)量分數(shù)，%)的增加遵循二次函數(shù)遞增規(guī)律，而塑性黏度隨著料漿濃度的增加遵循指數(shù)函數(shù)遞增規(guī)律；當料漿濃度低于70%時，充填料漿具有可觀的流動性，且流變參數(shù)與坍落度具有一定的關(guān)聯(lián)性。采用了四種擬合模型對坍落度與流變參數(shù)之間的關(guān)系進行擬合分析，發(fā)現(xiàn)料漿的屈服應力和塑性黏度隨著坍落度的增大遵循Logistic函數(shù)遞減規(guī)律；通過構(gòu)建的料漿濃度、坍落度與流變參數(shù)值之間的數(shù)學模型，建立了基于料漿濃度或坍落度的管道輸送阻力計算模型；以金川二礦區(qū)為工程背景驗證了新管道輸送阻力計算模型的準確性，表明采用料漿濃度或塌落度去替代流變參數(shù)計算管道輸送阻力值是可靠的。
關(guān)鍵字: 流變特性；尾砂；屈服應力；管輸阻力；塑性黏度
（1. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 1000083, China;
2. Key Laboratory of High-Efficient Mining and Safety of Metal Mines, Ministry of Education, Beijing 100083, China）
Abstract:In order to explore the rheological properties and the pipeline resistance calculation model of the tailings paste at different concentrations, the rheological tests and slump tests of different slurry concentrations were carried out in the laboratory. The results show that the yield stress and plastic viscosity of the slurry increase with increasing slurry concentration. According to the fitting results of the model, it can be known that the yield stress follows an increasing function of the quadratic function as the slurry concentration(mass fraction,%) increases, and the plastic viscosity follows an exponential function as the slurry concentration increases. When the slurry concentration is lower than 70%, the filler slurry has considerable fluidity, and there is a certain correlation between the rheological parameters and the slump. Four fitting models are used to fit and analyze the relationship between slump and rheological parameters, and it is obtained that the yield stress and plastic viscosity of the slurry follow the law of decreasing logistic function as the slump increases. Based on the mathematical model of slurry concentration, slump and rheological parameters, a pipeline resistance calculation model based on slurry concentration or slump is established. Taking Jinchuan No.2 mining area as the engineering background, the accuracy of the new pipeline resistance calculation model is verified, showing that it is reliable to use the slurry concentration or slump to replace the rheological parameters for calculating the pipeline resistance.
Key words: rheological property; tailings; yield stress; pipe resistance; plastic viscosity
