|View single post by oztrainz|
|Posted: Fri Jan 1st, 2016 11:40 pm||
Happy New Year,
The short answer is "it depends"on the size and type of the mine and the method of handling the coal at the surface above the load-out track.
For a small mine like on your plan, a drift mine into the side of the hill on the flat rather than a vertical shaft mine may be a better option. A head frame and winding house can eat a lot of real estate. Even a small shaft mine like the Bartley Mine at http://www.miningartifacts.org/West-Virginia-Mines.html the headframe and winding house are significant sized structures
It looks like the plan has only one load-out point, so the coal will be "run-of-mine' without any sizing being done at the load-out point. Compare the the track arrangement in the plan with
that loads to a different track for different sized coal. You could swing the screens or sizing plant 90 degrees and have separate bins over a single track, but I think the small space available in you plan might rule this out.
Depending on your period, the size of "run of mine" coal will vary from larger lumps with smaller fines through the coal in days of hand mining to a more uniform sized but smaller coal if the coal is being mechanically mined.
If the coal is delivered from the mine by a conveyor belt, then you could model a bin under the end of the conveyor belt. If the coal was delivered to the surface in coal skips, then you would have something like the skip tipples shown at https://www.nwhs.org/archivesdb/selectdocs.php?index=s&id=566
From your plan it looks like you have enough room on the siding behind the tipple for 2 to 3 coal hoppers. Remember that you also need the same amount of room after they are loaded so that you don't foul your main line track.
Operationally you pick up 3 loaded coal hoppers, shove another 3 empty ones past the tipple for loading, put your train back together on the main line and continue on your way. At the tipple they would use gravity or a car puller to move the empty coal hoppers under the tipple for loading.
Also have a good look at
http://appalachianrailroadmodeling.com/abcs-of-coal-loaders/ and the rest of the Appalachian Railroad Modelling site or to the "Mines" page site at http://www.welshcoalmines.co.uk/index.html for some more inspiration,
Unanderra in oz