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  • The effect of surface irregularities on a falling rock motion

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    GratchevPUB5677.pdf (396.6Kb)
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    Accepted Manuscript (AM)
    Author(s)
    Gratchev, Ivan
    Saeidi, Somayeh
    Griffith University Author(s)
    Gratchev, Ivan
    Year published
    2019
    Metadata
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    Abstract
    This laboratory study seeks to investigate the effect of surface irregularities on the motion characteristics of a falling rock. The irregularly-shaped surfaces of greywacke with a range of joint roughness coefficient (JRC) from 2 to 18 were used in an experimental setup where a falling rock was dropped from a height of 110 cm. A high-speed camera was utilised to capture the trajectory of the falling rock upon its impact with the rock surface. The data from 287 tests were statistically analysed to determine the dominant type of motion and to establish relationships between JRC and the coefficient of restitution (CoR). The ...
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    This laboratory study seeks to investigate the effect of surface irregularities on the motion characteristics of a falling rock. The irregularly-shaped surfaces of greywacke with a range of joint roughness coefficient (JRC) from 2 to 18 were used in an experimental setup where a falling rock was dropped from a height of 110 cm. A high-speed camera was utilised to capture the trajectory of the falling rock upon its impact with the rock surface. The data from 287 tests were statistically analysed to determine the dominant type of motion and to establish relationships between JRC and the coefficient of restitution (CoR). The effect of surface roughness was seen in different modes of motion of the falling rock with more irregular surfaces often produced ‘sliding’ or ‘rolling’ instead of ‘bouncing’. The obtained data indicated that the rock surface roughness did not seem to have a significant effect on CoR; however, it affected the rebound angle of the falling rock.
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    Journal Title
    Geomechanics and Geoengineering
    DOI
    https://doi.org/10.1080/17486025.2018.1508857
    Copyright Statement
    © 2018 Taylor & Francis (Routledge). This is an Accepted Manuscript of an article published by Taylor & Francis in Geomechanics and Geoengineering on 14 Aug 2018, available online: https://www.tandfonline.com/doi/10.1080/17486025.2018.1508857
    Note
    This publication has been entered into Griffith Research Online as an Advanced Online Version.
    Subject
    Other earth sciences
    Soil sciences
    Civil engineering
    Civil geotechnical engineering
    Publication URI
    http://hdl.handle.net/10072/380872
    Collection
    • Journal articles

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