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Gold/Mining/Energy : Precious and Base Metal Investing -- Ignore unavailable to you. Want to Upgrade?

To: Condor who wrote (25987)12/26/2003 7:07:26 PM
From: E. Charters  Respond to of 39344
 
There is still narrow vein mining done by air percussion drilling, (Red Lake, Kirkland Lake, Hemlo, Timmins, Val d'Or) and yes, it was illegal for a helper to hold the steel even 25 years ago.ee But hold it they often did. A lot of gold mining shut down in the 1970's but I was working at operations until the late 1980's that did percussion air drilling with jacklegs and stopers. Mostly Rand, Denver Machines, but also Copco, Fujitsu.

Not all mining will go over to jumbos/hydraulic drills. Unless a line of small hydraulic equipment is made for narrow vein, and longhole drilling, air equipment will be with us for a while.

EC<:-}

EC<:-}



To: Condor who wrote (25987)12/27/2003 7:23:00 PM
From: E. Charters  Read Replies (1) | Respond to of 39344
 
I am debating about drifting and raising. I want to perhaps get a long tom for drifting as we will be tracked and using air. I think we will get an alimak for raising. We used to use a raise boring machine at Kerr. It was slow, (4 to 6 feet per shift) but safe. On the other hand, a 2 boom jumbo for driving drifts sounds like the ticket.

EC<:-}


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