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自从六十年代初期,轮胎行走的前端式装载机(以下简称前装机)和斗容大于7.6米~3的挖掘机在露天矿逐步推广使用后,对于装载设备的选择上目前已发生了很大的变化。在过去15年里,许多斗容7.6米~3以下挖掘机的装载工作量已被斗容4.6～11.5米~3的轮胎式前装机所取代。而一些大型露天矿山大多数都采用斗容大于7.6米~3的挖掘机与前装机配合工作,斗容7.6米~3以下挖掘机所完成的装载工作量则出现逐年减少的趋势。
Since the early 1960s, the front-end loader for tire walking (hereinafter referred to as the front loader) and the excavator with a bucket capacity of more than 7.6 m ~ 3 have been widely used in the selection of loading equipment after the gradual popularization and utilization of open pit mines The change. In the past 15 years, many of the bucketload capacity of 7.6 m ~ 3 excavator loading capacity has been bucket capacity of 4.6 ~ 11.5 m ~ 3 before the replacement of the tire type installed. However, most large open-cast mines use excavators with a bucket capacity of more than 7.6 meters to 3 to work with the former ones. The loading capacity of excavators with capacities of 7.6 meters to 3 tons has been decreasing year by year.