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Conference Proceedings

The Australasian Ground Control Conference An ISRM Regional Symposium (AusRock Conference) 2022

Conference Proceedings

The Australasian Ground Control Conference An ISRM Regional Symposium (AusRock Conference) 2022

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Managing steep seam dips and floor shears related dragline bench and lowwall instabilities

The Caval Ridge Mine is an open cut coalmine and located within the Bowen Basin region in Central Queensland, and commenced mining and processing operations in 2014. A number of geotechnical challenges for managing dragline bench and lowwall stabilities have been encountered in both southern and northern pits over the years. Southern Pits contain steep seam dips of up to 15° (27 per cent) whilst the northern pits also have shears below pit floors. Geotechnical guidelines to manage the risk of dragline bench failure and lowwall instability have been developed and improved since these geotechnical challenges were identified. The dragline guidelines include dragline tub offset distances from the 60° Line (SDL) or buttressing thickness for different seam dips greater than or equal to 8°. The low wall stabilisation guideline established floor disruption widths and depths depending on seam dips and presence of floor shears to known depths of up to 3 m.
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  • Managing steep seam dips and floor shears related dragline bench and lowwall instabilities
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  • Published: 2022
  • Pages: 14
  • PDF Size: 2.219 Mb.
  • Unique ID: P-02433-G7Y5Q3

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