深井充填钻孔内管道磨损机理及成因分析  

Wear Mechanism and Causes of Backfilling Drill-holes Pipelines in Deep Mine

作　　者：张德明[1] 王新民[1] 郑晶晶[1] 赵彬[1] 

机构地区：[1]中南大学资源与安全工程学院,长沙410083

出　　处：《武汉理工大学学报》2010年第13期100-105,共6页Journal of Wuhan University of Technology

基　　金：国家科技支撑计划(2006BAB02A03)

摘　　要：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。This paper establishes the physical and mechanical model of slurry flowing and discusses the wear mechanism of pipeline from the perspective of momentum and energy through analyzing the different slurry pipeline transport states in backfilling drill-holes.It is showed that the interface of air-slurry and the junction of vertical tube-horizontal tube will have a huge impact pressure in the free-fall para pulp.So the impact wear is the main form of wear and tear.At the same time,it analyses the forms and causes of wear and tear from the slurry pipeline movement pattern,combined with the actual situation of backfilling drill-holes in Jinchuan mine.The results show that the height of free-fall para pulp was 30.79 m,which is in accordance with the actual situation of 27～31 m.The terminal velocity of backfilling slurry that reaches the air interface is about 19.9 m/s,closed to 13 times of the initial velocity.The consumption energy on per unit area in 29～30 m has reached 30.95 times of this in full pipeline flow,it is also in accordance with the actual situation.

关 键 词：深井充填 充填管道 磨损机理 输送状态 磨损形式及成因 

分 类 号：TD8[矿业工程—矿山开采]