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The selection of design criteria for large open pits is an area of ongoing importance and one which must
continually be reviewed and improved upon during the lifetime of a mine project. Not only do the design
criteria directly impact upon the business case [and longevity] of a mine project but also the safety related
geotechnical issues, which must be planned for during the design process. The case study presented, is used
to illustrate the criteria and considerations of a large open pit design from an operational perspective. A
consistent message is required to be communicated at all stages and levels involving operators, operational
engineers, designers and management. This paper presents concepts to help interpret what percentage of pit
slope failure is acceptable and the resources required to implement varying inter-ramp slope angles with a
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Slope Design Criteria for Large Open Pits ― Case Study F. Pothitos, T. Li
352 Slope Stability 2007, Perth, Australia