Influence of crushed rock properties on the productivity of a hydraulic excavator

Scientific paper - Original scientific paper

• Author: Trpimir Kujundžić https://orcid.org/0000-0003-0320-5338
• Author: Mario Klanfar https://orcid.org/0000-0003-1629-873X
• Author: Tomislav Korman https://orcid.org/0000-0002-5252-299X
• Author: Zlatko Briševac https://orcid.org/0000-0001-7810-8255
• Author's institution: University of Zagreb; Faculty of Mining, Geology and Petroleum Engineering; (Department of Mining and Geotechnical Engineering)
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mining, Petroleum and Geology Engineering; Mining

Abstract (english)

Among many factors that influence an excavator’s performance and productivity, the volume of the bucket load and duration of the excavator working cycle are crucial. In this paper, both factors were investigated, including the granulometric composition of the excavated material. The volume of material in the bucket was determined by photogrammetric analysis while the excavator cycle time was measured by analysis of video recordings captured by a digital video camera during the excavator operation. Interconnections between the angle of repose, slewing angle, particle size distribution of material, and their effects on hydraulic excavator productivity were analyzed. It was found that a larger number of fine particles in granular materials with a higher coefficient of uniformity resulted in an increase in the volume of the bucket load. Correlation analysis revealed significant interconnection between the bucket fill factor and swell factor. It was also found that calculation of the production rate according to ISO (International Organization for Standardization) standards was more accurate for materials with a higher angle of repose while the CECE (Committee for European Construction Equipment) standard was more appropriate for materials with lower angles of repose.

• Keywords (english): hydraulic excavator; bucket volume; particle size distribution; fill factor; cycle time; productivity
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Applied Sciences
• Numbering: vol. 11, no. 5, 2345
• e-ISSN: 2076-3417
• DOI: https://doi.org/10.3390/app11052345
• URN:NBN: urn:nbn:hr:169:562203
• Publication: 2021-03-06
• Document URL: https://www.mdpi.com/2076-3417/11/5/2345
• Type of resource: Text
• Access conditions: Open access
• Created on: 2021-03-22 14:06:12