Optimization of cycle time for loading and hauling trucks in open-pit mining

Mohammed Mnzool¹, Hamad Almujibah¹, Mudthir Bakri², Ahmed Gaafar³, Adil A.M. Elhassan¹, Ehab Gomaa^1,4

¹Taif University, Taif, Saudi Arabia

²Qassim University, Unaizah, Saudi Arabia

³Mai-Nefhi Collage of Engineering, Asmara, Eritrea

⁴Suez University, Suez, Egypt

Min. miner. depos. 2024, 18(1):18-26

https://doi.org/10.33271/mining18.01.018

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ABSTRACT

Purpose. The purpose of the paper is to provide open-pit mining operations with practical strategies and insights to optimize truck loading and hauling cycles, ultimately leading to enhanced productivity and economic advantages.

Methods. The objectives are to minimize loading time, optimize the haul road network, enhance truck performance, and optimize dumping and return time. By diligently implementing these methods and achieving these objectives, open-pit mining operations can significantly reduce the truck cycle times, resulting in increased productivity, lower costs and improved profitability.

Findings. In this case, the total loading time of the excavator and shovel is determined to be 3.98 and 2.92 minutes, respectively, while the hauling time for total loading of the open-pit floor depends mainly on the average distance and speed of 239 m and 10.1 km/hour, which results in 1.53 minutes.

Originality. As a result, the total cycle time for open-pit mining is 19.765 minutes, resulting from the total loading time, hauling time for total loading, total dumping time, and total return time for empty transport of 4.265, 8.46, 0.86 and 6.18 minutes, respectively.

Practical implications. By combining theoretical analysis with practical insights and site-specific considerations, the paper aims to provide a comprehensive and applicable framework for optimizing truck cycle time in open-pit mining, resulting in improved efficiency and profitability of mining operations.

Keywords: cycle time, trucks, loading time, open pit, minimization, dumping time, sustainability

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