基于工程流体力学、统计学、管道自流输送等相关理论,结合金川龙首矿西部充填系统的实际情况,开发运用FLOW-3D软件,对膏体自流输送充填系统不同充填倍线条件下的管道工作特性进行数值模拟与分析.研究结果表明:随着充填倍线(N)的增加,充填系统管道进口、出口压力不断减少,而整个系统的总压力基本保持不变；当N＜3.0时料浆出口剩余压力过大,N≥3.5时管道压力损失过大；当N＞3.5时充填系统的流速比较接近膏体的临界流速；在稳定状态下,随着膏体流速的减慢,管道弯管连接处的局部压力损失逐步减小,而当N＞3.0且流速继续减小时,压力损失却随之增加.因此,综合考虑各充填倍线在流速、压力损失、流量以及弯管处压力损失,以低成本、高效率为原则,最终确定西部膏体自流充填系统满管流状态下的最优充填倍线N=3.0.%Based on the engineering fluid dynamics, statistics, pipeline self-flowing transportation correlation theories, the software of FL0W-3D was used to carry on numerical simulation and analysis for the operating characteristic of paste self-flowing transportation backfilling system under different pipe length-backfilling depth ratios, which combined with the actual situation of west backfilling system of Longshou mine in Jinchuan Group Limited Company (shortly, JCC). The results show that the inport and export pressure of backfilling system pipeline reduce with the increase of the pipe length-backfilling depth ratio (N), but the total pressure of the whole system remains basically unchanges. When N<3.0, the slurry surplus pressure of export is too large, and when N≥3.5, the loss of pipeline pressure is too large. When N> 3.5, the flow rate of backfilling system is closer to the value of the paste critical velocity. With the steady state of the paste flow and velocity slowing down, the loss of local pressure on the bend joints pipe gradually reduces. But when N> 3.0, the velocity of paste slurry continues to decrease and the loss of pressure also increases. Therefore, through comprehensively considering and comparative analyzing of the various pipe length-backfilling depth ratio in velocity, pressure loss, flow and bend pipe pressure loss, it is ultimately determined that the optimal pipe length-backfilling depth ratio in Jinchuan's Western full pipeline self-flowing transportation backfilling system is N=3.0, which is based on the principle of Low-cost and high efficiency.
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