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Questions and Answers
What is the primary function of a COS in the in-stope extraction sequence?
What is the primary function of a COS in the in-stope extraction sequence?
- To widen the orebody
- To increase the angle of arc of drillholes
- To reduce access constraints in stoping operations
- To provide the initial void for subsequent rings (correct)
Why might slightly wider rings be fired into the initial slot adjacent to a COS?
Why might slightly wider rings be fired into the initial slot adjacent to a COS?
- To prevent ground collapse
- To widen the slot void
- To gain additional ground (correct)
- To reduce the overall stope length
What may necessitate the inclusion of an additional COS in a stope?
What may necessitate the inclusion of an additional COS in a stope?
- An increase in orebody width (correct)
- Access constraints
- A decrease in stope length
- A change in drilling technology
Why is fanning of blastholes into unbroken ground to strip the slot usually unsuccessful?
Why is fanning of blastholes into unbroken ground to strip the slot usually unsuccessful?
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What does a drill rig need to be capable of in order to minimize the angle of arc that the drillholes cover?
What does a drill rig need to be capable of in order to minimize the angle of arc that the drillholes cover?
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