Tuesday, February 18, 2014

Pay Gravels: Managing boulders on your gold placer mining cut

Pay Gravels: Managing  boulders on your gold placer mining cut
Managing boulders on your gold placer mining cut.

A lot of placer  mines have a high percentage of boulders in the pay streak .

One of the ways to manage these is to use them to your advantage. I like to stack them up on the side of the next cut.  The reason for this is to essentially build a rock retaining wall for the purpose of clearly defining your next cut as you strip down to it.

This also helps keep dilution of the pay gravels from the overburden by using these boulders as a wall. Boulders are much easier to rake out and simply throw them back into your worked pit. I also like to use discarded stumps and trees along the edge if I have to.  These can be a bit messy to work with, and the wood can come back to haunt you in your settling pond with the duff and tree bark plugging your intake screens if you are recirculating your water. This is something to keep in mind.