Authors: V.V. Sinoviev, I.S. Kuznetsov, P.I. Nikolaev, A.V. Kuznetsova

Title of the article: Defining the degree of influence of unplanned downtimes on excavator-dump truck complexes operational performance

Year: 2024, Issue: 4, Pages: 117-124

Branch of knowledge: 2.8.8 Geotechnology, mining machines

Index UDK: 622.2, 004.94

DOI: 10.26730/1999-4125-2024-4-117-124

Abstract: The article outlines the need to identify the most significant unscheduled downtime of excavators and dump trucks during open-pit mining in order to simplify the process of optimizing the parameters of mining machines and planning measures to minimize downtime by eliminating many downtimes that have a minor impact on the operational performance of the excavator-vehicle complex. To solve the problem, an approach has been proposed that consists of ranking unscheduled downtime based on a developed criterion that takes into account the influence of the frequency and duration of downtime on the operational performance of the excavator-vehicle complex. To assess the operational performance of the excavator-vehicle complex, taking into account unscheduled downtime and the interaction of excavators and dump trucks in time and space, a simulation model was developed. It was created on the basis of queuing theory with software implementation in the GPSS World-Core simulation language in the specialized GPSS Studio simulation environment. The model consists of segments depicting the operation of dump trucks and an excavator in the face, the functioning of dump trucks when transporting rock mass to the unloading point and their return to the attached excavator, the operation of dump trucks at the unloading point, the occurrence of planned and unscheduled downtime of the excavator and dump trucks according to organizational and technical reasons. As an example of using the proposed approach, an assessment is given of the degree of influence of unscheduled downtime during the operation of an excavator-vehicle complex operating in the conditions of the Kedrovsko-Krokhalevsky field, and including a Hitachi EX-1900 hydraulic backhoe excavator with a bucket capacity of 11 m3 and four BelAZ-75131 dump trucks with a lifting capacity of 130 tons.

Key words: excavator-dump truck complexes operational performance unplanned downtime simulation modelling analysis of variance

Receiving date: 18.05.2024

Approval date: 25.07.2024

Publication date: 26.09.2024

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