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通过分析充填钻孔管道内料浆不同输送状态,建立了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,得出自由下落段料浆在空气与料浆交界面和垂直管与水平管的交界处的冲击压力产生的冲击磨损是充填管道的主要磨损形式。并结合金川矿区的充填钻孔调查实际情况,从料浆运动方式上分析了管道磨损形式及成因。研究表明,自由下落段高度为30.79 m,与实际情况27~31 m相符;充填料浆到达空气交界面的终端速度约为19.9m/s,接近初始速度的13倍,管壁单位面积上的耗能量在29~30 m处达到了满管流动时的30.95倍,也与实际情况符合。
The physical and mechanical models of slurry flow were established by analyzing the different transport states of the slurry in the filled borehole pipeline. The wear mechanism of the filled pipeline was discussed in terms of momentum and energy. And the impact of vertical pipe and horizontal pipe junction pressure impact wear is the main form of wear and tear of the filling pipe. Combined with the actual situation of filling drilling in Jinchuan mining area, the pipeline wear form and causes were analyzed from the way of slurry movement. The results show that the height of free fall section is 30.79 m, which is consistent with the actual situation of 27 ~ 31 m. The terminal velocity of filling slurry reaching the air interface is about 19.9 m / s, which is close to 13 times of the initial velocity. The energy consumption reached 30.95 times of the full pipe flow at 29-30 m, which is in line with the actual situation.