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Re: Welding Gloves

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"Jim Wilkins" <muratlanne@gmail.com> writes:

> "Richard Smith"  wrote in message news:m1a4uj4vuf.fsf@void.com...
>
>
> I missed these responses with being ...
> * volunteering contributions at the hobby mine (have Eimco 12b - need to
> dismantle it and get it down the shaft and some bolted connections have
> been welded-up)
> * mind caught up on a line of thought about rock crushers.
>
> -------------------------
> https://en.wikipedia.org/wiki/Rocker_Shovel_Loader
>
> How does the crushed ore get to the end of the track, or the track
> into the pile? Dumping the ore onto the track seems likely to derail
> the machine.

Pardon - not understanding the question well.

Pardon if my best guess is wrong.

As best I understand - you'd be using an Eimco while driving as tunnel
during "development" - while you are taking ore, you are "developing"
into new resource so the mine continues in a quasi-static balance of
extraction and development.

If you are looking to where the tonnages of ore gets onto the tramming
level, that's through "box holes" and down "cousin jack chutes" into the
wagons.  It's a hopper in gravity, with all but the wooden chute being
formed in the rock.  No Eimco there.  All gravity.  This is the whole
concept of "stoping".  Various strategies to do it, but in Cornwall a
lot was "shrinkage stoping".  You drill overhead into the lode with a
"peg-leg".  Then blast to break-up the lode.  The trammers usually
working at night draw off a certain amount of ore down the cousin jack
chutes into the wagons such that the space left is just right for the
stopers coming in the next day to have a couple of metres height to
repeat drill-and-blast.  Hence "shrinkage stoping".  No of this involves
Eimcos.  You only freely draw-off the blasted broken-up ore when the
stopers cannot go any higher because they are just below the previous
deepest level.

Back to the Eimcos and development.
You drill with an air-leg (N.Am. "jack-leg") rock-drill and blast.
One part of your question - never seen it, but you lay channels on the
rails which push up to the blasted material and drive the Eimco down
those channels.  The Eimco back-flips the broken material, probably
mainly "attle" ("deads" - no or not worth bothering with mineral
content), into the wagon behind, and when full is taken away and new
empty wagon there.

As the drive continues, the folk who make box-holes come along and break
into the lode on the upward diagonal.  So that will be some muck to
clear-up.

I heard first hand about this because through a frosted-glass window of
a caravan ("trailer") I saw a vague object and asked if that is an
exploder (for electric detonators - newer more compact version of the
"dynamo" version Wile-e-Coyote frequently uses in the "Roadrunner"
cartoons).  He said yes and showed me.  He was a box-hole maker.  He
joined us for a cup of tea and explained the method, equipment and how
it was used in stoping.
BTW in at least one abandoned mine there's a stope where you are
up-and-down because the ore has been drawn off from down below by the
boxholes, and it wasn't worth pushing the "serations" of piles
in-between into the box-holes, so you get a lot of exercise going
up-and-down along the huge nearly-empty stope.
Down below, the cousin jack chutes are still there.

Hope this is what you sought.

Best wishes

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Re: Welding Gloves bisonlifeusa <3a2f29cbe4f96678cab13cec9b1c8995@example.com> - 2026-03-26 23:30 +0000
  Re: Welding Gloves Snag <Snag_one@msn.com> - 2026-03-26 20:36 -0500
    Re: Welding Gloves Bob La Londe <none@none.com99> - 2026-03-27 11:13 -0700
      Re: Welding Gloves Snag <Snag_one@msn.com> - 2026-03-27 15:36 -0500
        Re: Welding Gloves Richard Smith <null@void.com> - 2026-04-20 21:31 +0100
          Re: Welding Gloves Bob La Londe <none@none.com99> - 2026-04-20 13:59 -0700
            Re: Welding Gloves Snag <Snag_one@msn.com> - 2026-04-20 22:41 -0500
              Re: Welding Gloves Bob La Londe <user16941@newsgrouper.org.invalid> - 2026-04-21 13:42 +0000
            Re: Welding Gloves "Jim Wilkins" <muratlanne@gmail.com> - 2026-04-23 13:23 -0400
              Re: Welding Gloves Richard Smith <null@void.com> - 2026-05-01 05:06 +0100
                Re: Welding Gloves "Jim Wilkins" <muratlanne@gmail.com> - 2026-05-01 06:29 -0400
                Re: Welding Gloves "Jim Wilkins" <muratlanne@gmail.com> - 2026-05-01 17:23 -0400
                Re: Welding Gloves Richard Smith <null@void.com> - 2026-05-02 06:05 +0100
                Re: Welding Gloves Richard Smith <null@void.com> - 2026-05-02 16:51 +0100
                Re: Welding Gloves "Jim Wilkins" <muratlanne@gmail.com> - 2026-05-03 19:08 -0400
                Re: Welding Gloves Richard Smith <null@void.com> - 2026-05-04 07:42 +0100
                Re: Welding Gloves "Jim Wilkins" <muratlanne@gmail.com> - 2026-05-04 07:18 -0400
                Re: Welding Gloves "Jim Wilkins" <muratlanne@gmail.com> - 2026-05-01 21:18 -0400
          Re: Welding Gloves Snag <Snag_one@msn.com> - 2026-04-20 22:22 -0500
            Re: Welding Gloves Richard Smith <null@void.com> - 2026-05-01 05:10 +0100
            Re: Welding Gloves Richard Smith <null@void.com> - 2026-05-01 05:14 +0100
              Re: Welding Gloves Snag <Snag_one@msn.com> - 2026-05-01 06:58 -0500
                Re: Welding Gloves Bob La Londe <none@none.com99> - 2026-05-01 11:11 -0700
                Re: Welding Gloves Richard Smith <null@void.com> - 2026-05-02 05:28 +0100
                Re: Welding Gloves Snag <Snag_one@msn.com> - 2026-05-02 07:02 -0500

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