充填管道磨损形式及机理分析研究

针对充填管道易磨损的问题，对金川矿区的充填钻孔进行调查，分析发现料浆在自由下落段的冲击磨损是充填管道的主要磨损形式。建立料浆流动的物理力学模型，从动量和能量的角度探讨充填管道的磨损机理。研究表明，自由下落段的高度越大，料浆到达空气砂浆交界面的速度越大，对局部管壁的冲击磨损就越严重。提出管壁单位面积耗能量的概念，得出管壁单位面积耗能量越大，管壁磨损速率越快的结论。

A Study of the Abrasion Form and Mechanism of Backfilling Pipelines

In view of the easy abrasion of backfilling pipelines, an investigation is made of the filling drill-holes in Jinchuan mine area. It is found that the abrasion caused by the impact of pulp in free falling is the main wear mode of filling pipeline. The physical and mechanical model for slurry flow is established and the wear mechanism of filling pipeline discussed from the viewpoints of moment and energy. The study indicates that the longer the distance of free falling, the greater the speed for the slurry to arrive at the interface between air and slurry and the more serious the impact abrasion on local pipe wall. A concept of energy consumption of unit area of pipe wall is proposed and it is concluded that the higher the energy per unit area of pipe wall, the faster the pipe wall abrasion.