Path: csiph.com!weretis.net!feeder9.news.weretis.net!panix!usenet.blueworldhosting.com!diablo1.usenet.blueworldhosting.com!nnrp.usenet.blueworldhosting.com!.POSTED!not-for-mail From: Richard Smith Newsgroups: sci.engr.joining.welding,rec.crafts.metalworking Subject: Re: Welding Gloves Date: Sat, 02 May 2026 16:51:41 +0100 Organization: BWH Usenet Archive (https://usenet.blueworldhosting.com) Message-ID: References: <18a08803acaea39d$66042$2031059$4006de53@news.newsgroupdirect.com> <10q4mv3$1bhdb$1@dont-email.me> <10q6hcg$3v93p$1@dont-email.me> <10q6poo$1elv6$1@dont-email.me> <10s643t$11ks6$1@dont-email.me> <10sdkhp$36tn1$1@dont-email.me> <10t35il$1ndk3$1@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain Injection-Info: nnrp.usenet.blueworldhosting.com; logging-data="87625"; mail-complaints-to="usenet@blueworldhosting.com" User-Agent: Gnus/5.13 (Gnus v5.13) Cancel-Lock: sha1:cJTaIVpaD0DENHPLrlDePahvon4= sha1:HHFobziDwuv61Nug8nvhzuYXRas= sha256:R0Ixit+hlrD57kn2d0o5OGfv7KrCMqNIWpLxusL3sb0= sha1:vqF5Lzezs0mNHn1b0swXIUnZ+w4= sha256:O7uVI5IWaonSIG6XufP24VInhhg14CJ+HKnINSJf6Iw= Xref: csiph.com sci.engr.joining.welding:13899 rec.crafts.metalworking:543224 Richard Smith writes: > "Jim Wilkins" 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 ;-)