Pipeline Resistance Model of the Filling Slurry Transportation with High Concentration and Superfine Total Tailing
ZHANG Qinli;JIANG Zhiliang;WANG Shi;CHEN Qiusong;ZHU Yangya;WAN Xiaoheng;School of Resources and Safety Engineering,Central South University;
In order to accurately calculate the pressure loss in a filling pipeline with superfine total tailing and high concentrationslurry in a mine, on the basis of the solid-liquid two-phase flow theory, the factors that affect the backfilling pipeline resistance ofthe total tailing slurry are analyzed, to obtain a calculation model of the pipeline transportation resistance with a high concentrationand superfine total tailing slurry through the dimensional analysis. According to the method of the computational fluid dynamics(CFD), the effects on the filling pipeline resistance of some factors, like the slurry volume concentration, the flow rate, the pipediameter, the solid mixture density and others, are evaluated, 360 groups of the pipeline resistance loss values are obtained; Using theleast squares and linear regression method, the parameters in the transportation resistance model are calculated. With four commonoperating points selected, an error analysis of the calculation model is made, and according to the method of the regression coefficientsignificance test, the degree of the influence on the pipeline resistance loss of each factor is obtained finally. The error of thecalculation model results against those of the pumping experiment with loop is around 5%, so it could meet the needs of theengineering design and can be used to reduce the pipe resistance.