Authors: S.Yu. Brozovsky, V.S. Shestakov

Title of the article: Analysis of loading of the boom of a dragline excavator

Year: 2025, Issue: 6, Pages: 3-9

Branch of knowledge: 2.8.8. Geotechnology, Mining machines (engineering)

Index UDK: 622.271

DOI: 10.26730/1816-4528-2025-6-3-9

Abstract: When analyzing the process of transporting rock mass to the dump by a dragline excavator bucket, spilling of rock back into the face was revealed. The volume of spilled rock is affected by the position of the bucket when breaking away from the face after digging is finished and the trajectory of the bucket. To find rational parameters that ensure the least loss of rock mass during transportation, a mathematical description was compiled to determine the angle of inclination of the bucket and the volume of rock in it depending on the parameters of the bucket with suspension. The bucket contains a harness of flexible elements - ropes and chains, which does not allow obtaining a mathematical model for the unambiguous calculation of the bucket tilt angle depending on the forces in the lifting and traction ropes, therefore a search algorithm is used, including three cycles for searching for the position of the axes of the connection of the lifting ropes with the lifting chain, the traction ropes with the traction chain, the bucket tilt angle according to the condition of equality of the specified length of the unloading rope and its calculated value, determined by the positions of the bucket and the specified axes. The results of the studies are presented. The method of calculating the parameters of the harness for practical application in the design of new models of excavators and their buckets includes a software module in the algorithmic language Visual Basic with implementation in the Microsoft Excel application. The adequacy of the mathematical model is checked by comparing the results obtained during calculations in the software module with the results obtained by graphically constructing a drawing in the Kompas design package.

Key words: Excavator-dragline harness bucket force lifting and traction ropes mathematical model

Receiving date: 31.10.2025

Approval date: 14.11.2025

Publication date: 18.12.2025

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