深井矿山充填满管输送理论及应用

为了提高深井矿山充填管道的满管状态,提出以满管率作为系统满管状态定量描述指标,基于水力学输送理论推导了满管率的数学模型,并对其影响因素作了理论分析,明确减小管道直径及增大系统流量是提高满管率的最佳途径.基于管道两相流理论,建立了管径、流速以及满管率关系的数学表达式,为系统最佳输送参数的选取提供了理论依据.对某深井矿山充填系统进行的局部改造结果显示:将系统原φ150 mm水平管道替换为φ85 mm管道,同时增大流量至80 m3·h-1,系统满管率为原来的6倍,有效减轻了管道磨损. 

Full-flow transport theory and its application in deep mine backfilling

In order to improve the full-flow state of backfilling pipelines in deep mines, full-flow ratio was put forward to regard as a quantitative index to describe the full-flow state of the filling system. At the same time a mathematical model of full-flow ratio was deduced based on the hydraulic transmission theory and its influence factors were also analysed in theory by using the mathematical model. It is found that reducing the pipe diameter or increasing the slurry flow velocity is the best way to increase the full-flow ratio. On the basis of the pipe two-phase flow theory, a mathematical expression about the relationship of the pipe diameter, velocity, and full-flow ratio was also established, which provides a theoretical basis of selecting the best conveying parameters for the filling system. A local reform, replacing Ф150 mm pipes with Ф85 mm pipes and increasing the flux to 80 m3·h-1 simultaneously, was carried out in a deep mine filling system. The results show that the full-flow ratio of such system is able to be improved by 6 times and the pipe wearing can be reduced effectively.