Log in

View Full Version : Drill type



DanAk
10-04-2012, 10:44 PM
Looking for recommendations for a type of drill for a placer deposit, I think at this point I would benefit by drilling and logging during winter months, and working the deposit during the summer.. Thank's in advance

Steve Herschbach
10-05-2012, 11:07 AM
Placer Examination Principles and Practice by John H. Wells
1969 BLM Technical Bulletin 4
http://www.ntc.blm.gov/krc/uploads/463/Wells.pdf (http://www.ntc.blm.gov/krc/uploads/463/Wells.pdf)

Geo Jim
10-06-2012, 12:21 PM
How much money do you want to spend? Drilling is EXPENSIVE! The best drilling rig for placer is a reverse circulation hammer drill. You should call Penn-Jersey in Wasilla for a cost per foot figure.

If at all possible, use a large excavator to do your exploratory digging. They allow you to take much bigger and more reliable samples. Excavators are better for going cross country and might even be cheaper per sample, but I am not sure about this last point. Plus excavators are much more available throughout the Bush.
Geo Jim

chickenminer
10-06-2012, 03:00 PM
Dan..
Very common now here in the Fortymile is the use of the smaller rotary auger drills. 4-5"
bits. Then of course there is always the old churn drills, if you can locate one. They were slow but they sure did the job.

DanAk
10-07-2012, 10:29 AM
Thanks for the reply's, Thinking about setting up a drill on a track rig to explore with mostly mapping bedrock depth and depth of pay gravels, my ground is not deep probably 20 feet will go to the bottom everywhere, average is about 8' yes an excavator makes a good sampling tool I have been testing with mine so far it digs 22 ft deep. maybe an auger would be a good idea, lightweight, low surface disturbance.