Report

Calculation of Pillar Dimensions fo Mt Davy Colliery
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Report reviews the proposed 80 m by 80 m pillar design and the formula(s) used to produce the safety factor. It suggests that by using the Squat formula (argues more appropriate) the pillar width can be reduced to 55 m by 55m which will increase areal extraction from 10.4% to 16%. Note the figures are not included.

Report ID cr3856
Class Coal
Type Geotechnical
Permit 41225
Operator Coal Corporation of New Zealand
Commodity Coal
Region West Coast Region
Start Date 30 June 1993
End Date 30 June 1993
Report extents in GeoJSON
Author Madden B.
Data Format
  • PDF