Path: csiph.com!weretis.net!feeder9.news.weretis.net!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 06:05:56 +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="40569"; mail-complaints-to="usenet@blueworldhosting.com" User-Agent: Gnus/5.13 (Gnus v5.13) Cancel-Lock: sha1:GrchfXtQ10F/giX06a12EYWA1tk= sha1:QN2gefoAXUq7N422KmfZH/prFVo= sha256:Ts+eLKiZHefT1J1gV4KotawvGyQPoGGpxSl4JjjRS1c= sha1:tPYEan3ReZexYfANKKd+naJmy0A= sha256:8A65KiF5lF3nDEZq1D4/TmwbCpS0BYwdlGFbnMWciq4= Xref: csiph.com sci.engr.joining.welding:13897 rec.crafts.metalworking:543223 "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