Παρουσιάσεις

Τίτλος εργασίας: Στοχαστικός Προσδιορισμός Βέλτιστης Επιλογής Φορτωτών– Φορτηγών σε Υπαίθρια Μεταλλεία/Λατομεία.
 

Τίτλος εργασίας στα αγγλικά: Stochastic Determination of Optimal Selection of Loaders–Trucks in Open-Pit Mines/Quarries

Τριμελής εξεταστική επιτροπή:

1. Γεώργιος Ξηρουδάκης, επικ.καθηγητής σχολής ΜΗΧΟΠ (Επιβλέπων)

2.Εμμανουήλ Βαρουχάκης, επικ. καθηγητής σχολής ΜΗΧΟΠ

3. Δρ. Γεώργιος Σαράτσης, μέλος ΕΔΙΠ σχολής ΜΗΧΟΠ

Περίληψη

Abstract: This present thesis examines the application of queuing theory to simulate the haulage operation of surface mining operations, aiming to optimize mechanical fleet productivity. The methodology examines the impact of truck waiting time variability at loading points (idle times) in two different case studies, by modifying operational parameters such as dumping locations and equipment layout. Additionally, it includes the estimation of CO₂ emissions and proposes alternative scenarios to reduce emissions per unit of transported material. This study examined two actual open-pit operations, namely:

• Ernest Henry Mine in Australia: various theoretical cases of loader-truck combinations were examined, with replacement by electric vehicles and the use of trolley lines.
• SKYRA VASA LTD quarry in Cyprus: actual time records were used to estimate the performance of the mechanical equipment.

By studying the above cases and based on the match factor and queueing theory, the importance of the correct loader-truck ratio and its effect on waiting times and fuel consumption was highlighted. In the case of Ernest Henry, which is a larger-scale mine, CO₂ emissions were reduced by up to 62% by installing a "trolley" system on the route taken by trucks as they left the mine.

Keywords: Open pit mining, Queueing theory, Decarbonization, Greenhouse gas emissions, Carbon dioxide (CO₂).