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    An engineering geological investigation of batter stability, Weavers opencast coal mine, Huntly

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    Figure 1 Engineering Geological Plan of Weavers Point Open Cast Mine, June July 1987.pdf (190.6Mb)
    Figure 2 Engineering Geological Plan of Weavers Opencast Mine July 1987.pdf (161.6Mb)
    Author
    Wezenberg, Udo
    Date
    1988
    Permanent Link
    http://hdl.handle.net/10092/9397
    Thesis Discipline
    Geology
    Degree Grantor
    University of Canterbury
    Degree Level
    Masters
    Degree Name
    Master of Science

    Cut slope batter instability of overburden in Weavers Opencast Mine at Huntly involves 0-65m succession of Waikato Coal Measures and Glen Afton Claystone of the Te Kuiti Group (Eocene to Oligocene), and a 15-65m sequence of overlying gravels, pumiceous sands, silts, clays and peats of the Tauranga Group (Pliocene to Holocene). Field and laboratory investigations were conducted to determine the causes and mechanisms of cut batter instability. Field investigations included: detailed engineering geological mapping of the entire highwall at a scale of 1:1584; detailed batter logging and sampling of lower Tauranga Group materials and defect orientation surveys of Te Kuiti Group and Tauranga Group for stereographic analysis of failure modes. Laboratory investigations included: shear strength testing of the Te Kuiti-Tauranga Group unconformity contact and representative joint and bedding planes in the lower Tauranga Group; X.R.D. and chemical tests for clay mineralogy, grainsize distribution, atterberg limits, field moisture content, density and void ratio determination for Tauranga Group Materials.

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