Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > sci.engr.joining.welding > #13899

Re: Welding Gloves

Cross-posted to 2 groups.

Show key headers only | View raw

Richard Smith <null@void.com> writes:

> "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

Looked up Ozark on maps - good place to be by the look of it.
Yes not a Harley "Monster"-Glide or a Honda "Lead"wing ;-)

Back to sci.engr.joining.welding | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

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

csiph-web