I remember reading about those large electric tethered coal shovels, and
how they were reducing carbon footprint by being more efficient than diesel
powered ones. Seemed a little ironic, given that they were mining coal
with them.
Zeke
On Fri, Feb 21, 2014 at 10:53 AM, Bill Dube <billd...@killacycle.com> wrote:
> Electric coal mining equipment is cord-connected. Even enormous draglines
> ("steam" shovels on steroids) are typically cord connected with 13 kV
> cables. It is a mature science. Coal mining equipment has been electric
> powered since the early 1900's. Specialized cables, reels, transformers,
> and equipment for the mining industry. Easily transferable technology to
> agriculture.
>
> They typically put a reel on the back of the mining machine that pays out
> (or pulls in) the cable as needed. They have a "load center" transformer
> that is moved around as the mining process proceeds.
>
> Electric shuttle car for underground coal transport from working face:
> http://www.undergroundcoal.com.au/fundamentals/11_face.aspx
>
> Nifty tutorial on cables for mining EVs:
> http://www.cdc.gov/niosh/mining/content/deratingfactors.html
>
> Dragline cable:
> http://www.miningphoto.com/details/2140/dragline_working_
> in_background_removing_overburden_with_drill_rigs_drilling_blas
>
> Bill Dube'
> (Used to work as an Electrical Inspection intern for the Mine Safety and
> Health Administration, MSHA)
>
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