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摘要:
In this paper, the performance of a waste rock transportation process in an open pit mine was assessed by using cycle time data. A computerized truck-excavator dispatch system was used to record the cycle times. The process was broken into seven steps (or components of the total cycle), durations of which were recorded for a period of 1 month, leading to N = 60,690 data points or dispatches. The open pit mine studied consisted of 12 waste types loaded by 14 excavators and hauled by 49 trucks (at a trucks-to-excavator ratio of 3.5:1) in 75 changing locations. The string-type data was coded using integers to allow a FORTRAN code to extract process performance parameters using statistical analysis. The study established a wide range of parameters including: the waste material generation rate (about 1.73 million t/month, 81% comprising waste rock), truck fill factor, f, total cycle time (Tct), production capacity, theoretical cycle time, non-productive cycle time Tnp, and cycle time performance ratio (CTPR), denoted as Tpr. The factors affecting the process performance include: truck model, excavator model, location (haul distance and road conditions) and material type. For a fixed material type and tonnage, the PDFs of the cycle time components were logarithmic in nature, capable of differentiating performance variations under different factors. It was concluded that the performance of the waste material transportation system in this mine was determined to be acceptable due to mean value of Tpr = 2.432 being closer to unity. Reduction measures were suggested to minimize the cycle time for the process bottlenecks determined from Pareto analysis (that is, full haul, empty haul and loading processes).
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篇名 Analysis of Waste-Rock Transportation Process Performance in an Open-Pit Mine Based on Statistical Analysis of Cycle Times Data
来源期刊 工程(英文)(1947-3931) 学科 医学
关键词 Potentially Acid-Forming (PAF) ROCK Non-Acid FORMING (NAF) ROCK TRUCK Utilization TRUCK Fill-Factor Queuing TIME Loading CYCLE TIME Full and Empty HAUL Total CYCLE TIME Theoretical CYCLE TIME Non-Productive CYCLE TIME CYCLE TIME Performance Ratio
年,卷(期) gc-eng_2017,(7) 所属期刊栏目
研究方向 页码范围 649-679
页数 31页 分类号 R73
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节点文献
Potentially
Acid-Forming
(PAF)
ROCK
Non-Acid
FORMING
(NAF)
ROCK
TRUCK
Utilization
TRUCK
Fill-Factor
Queuing
TIME
Loading
CYCLE
TIME
Full
and
Empty
HAUL
Total
CYCLE
TIME
Theoretical
CYCLE
TIME
Non-Productive
CYCLE
TIME
CYCLE
TIME
Performance
Ratio
研究起点
研究来源
研究分支
研究去脉
引文网络交叉学科
相关学者/机构
期刊影响力
工程(英文)(1947-3931)
月刊
1947-3931
武汉市江夏区汤逊湖北路38号光谷总部空间
出版文献量(篇)
367
总下载数(次)
1
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