SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Gold/Mining/Energy : Donner Minerals (DML.V)
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  
To: donkeyman who wrote (4342)5/7/1998 11:29:00 AM
From: Midas  Read Replies (1) of 11676
 
Hello Donkeyman:

I concur with 1King that 1200m per day is an absolutely unrealistic footage for any drill now in existence. Drill technology hasn't changed that much recently. A more realistic upper limit for drilling in massive rocks like those of the SVB area is on the order of 80m per 12 hour shift (160m or 500'/day). This assumes that the drill operators have had experience with similar rock elsewhere and know what kind of drill bit to use to get optimal cutting power. Other factors that come into play are the experience of the drillers on each shift, down time required to move the rig between setups (holes), faults or fractured rock encountered in the hole,as well as miscellaneous start up problems like waterlines freezing early in the season. Given these considerations, daily footages drilled during the first week or so could be on the order of 100m/day (330'/day) before increasing to somewhere around 150m/day (500'/day). The optimal footage drilled per day (150m) will be impacted by all moves between holes. If the rig can simply be pulled to a new site, the down time will be minimal. In all probability, the rig will have to be moved by helicopter in order not to damage the environment. This usually requires that the rig be broken down into pieces small enough for the helicopter to sling from site to site. Obviously the length of the move will also add to the down time of the rig.

Midas
Report TOU ViolationShare This Post
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  

HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2025 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News