GREY:PCGLF - Post by User
Post by
opti007on Feb 27, 2012 6:34pm
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Post# 19594221
Drilled, or not ?
Drilled, or not ? What can be done in 1 week depends on "penetraton rate" :-) A sample values can be found in
https://www.saimm.co.za/Journal/v103n08p515.pdf
Based on this reference, in hard rock it is about 3cm per minute. To drill 200m, assuming one drill and excluding setup time:
((200m*100cm/m)/3cm)/60min/hour = 111 hours od drilling time
Vein 22 starts at about 20m, 200m of drilling would cover 4 holes to 50m each.
This is just an exercise in arithmetic ...( I am *not* a mining engineer :-)
007