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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >In situ studies on service life and pick consumption characteristics of shearer drums
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In situ studies on service life and pick consumption characteristics of shearer drums

机译：采煤机滚筒使用寿命和采摘量特性的原位研究

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Longwall shearers usually suffer from excessive pick and pickholder consumptions and severe wear of the backplate of the clearance ring section of shearer drams. In practice, most of the drums were seen to be withdrawn from the face due to the abovementioned problems, while vane picks and their holders were intact due to the improper lacing design of the clearance ring picks. However, few underground investigations and their results on the effect of lacing arrangement of clearance picks on the service life of shearer drums have been published. Nevertheless, the pick consumption characteristics of shearer drums were not investigated in detail, since these are fewer pick consumptions with shearers when compared to roadheaders. This paper is concerned with the comprehensive in situ trials on the effect of lacing of clearance ring picks on the lifespan of shearer drums, and the pick consumption characteristics of longwall shearers at Cayirhan Coal Mine in Turkey. The lifespan of shearer drams employed with shearers in this mine increased 70 per cent, while the consumption rate of clearance ring picks decreased three fold through using an alternative lacing for clearance picks, indicating the significance of utilizing proper design techniques for clearance ring picks for the service life of shearer drums. Statistical analyses carried out, using the raw pick consumption data, implied that the clearance ring picks experienced much higher loads than vane picks, revealing that special attention must be paid to designing clearance ring picks. An average maximum consumption value of 41 was determined for clearance ring picks, with corner-cutting picks having the most replacements, while it was 35 for vane picks, on three-day based pick replacements.
机译：长壁采煤机通常遭受过多的采摘和采摘人消耗，并且采煤机悬臂的间隙环部分的背板严重磨损。在实践中，由于上述问题，大多数鼓从表面撤出，而由于间隙环镐的鞋带设计不当，叶片镐和它们的支架完好无损。然而，很少有地下调查及其对间隙镐的系带布置对采煤机滚筒使用寿命的影响的结果。但是，由于没有与掘进机相比采煤机的采煤量少，因此没有详细研究采煤机滚筒的采煤量特性。本文涉及间隙环截齿的系带对采煤机滚筒寿命的影响以及土耳其Cayirhan煤矿长壁采煤机的采煤机消耗特性的综合原位试验。在该矿山中，与采煤机一起使用的采煤机的使用寿命增加了70％，而通孔镐的消耗率通过为通孔镐使用替代性鞋带而降低了三倍，这表明为通孔镐使用适当的设计技术的重要性。采煤机滚筒的使用寿命。使用原始截齿消耗数据进行的统计分析表明，间隙环截齿比叶片截齿承受更高的载荷，这表明必须特别注意间隙环截齿的设计。对于三天的镐型更换，确定间隙环镐的平均最大消耗值为41，其中切角型镐的更换最多，而叶片型镐的平均最大消耗值为35。

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