拉铲倒堆工艺采掘带宽度优化研究

Optimization of the Cut Width in Dragline Stripping System

拉铲倒堆工艺是一种先进的露天开采工艺,它集采掘、运输与排土3项作业于一体,如果地质和生产条件允许使用拉铲,则拉铲倒堆工艺优于其他挖掘和运输系统。针对拉铲倒堆剥离工艺,以拉铲作业工作量最大化为原则,进行采掘带宽度优化。采掘带宽度主要与拉铲的回转角度有关,以此来建立采掘带宽度与工作总时间的函数关系。通过对该函数的分析,确定合理的采掘带宽度为40-60 m。同时,为了达到较好的抛掷爆破效果,并参考国内外的经验,最终选取采掘带宽度为40 m。

Dragline stripping technology is an advanced open-pit mining method which integrates mining,transport and dumping. If the geological condition and the production status fit for the dragline,the dragline stripping system is better than other digging and transporting system. In view of the dragline stripping technology,and in the principle of aiming at the maximum production,the cut width is optimized. The width of a mining panel is closely related to the swing of the shovel during working. Based on this,the functional relationship between the cut width and the total working time is established. By the analysis of the function,the rational cut width is determined as the value from 40 to 60 m. At the same time,in order to obtain good effect of the throw blasting and with reference for domestic and abroad experience,the final cut width is selected as 40 m.