Talk:Longwall mining

message: I'm having trouble following the "Modern methods" section.  It jumps immediately into discussing "gate roads", without ever defining the term, nor linking to another article which does.  As someone with absolutely no familiarity with mining jargon, this doesn't mean anything to me. 157.127.239.146 (talk) 14:08, 14 May 2010 (UTC)
thread_title:  Gate roads 

message: LongWall Mining is generally of 2 types:
1. Longwall Advancing
2. Longwall Retreating  — Preceding unsigned comment added by Him.12.pat (talk • contribs) 23:26, 12 April 2011 (UTC)
thread_title: TYPES OF LONGWALL MINING

message: OK take a look at West Virginia retreating longwall mine.  First of all, is this a top view or side view?!?  I assume top view; would be nice if someone who's sure could insert that phrase.  
The words "Barrier Pillar" are in white areas.  Are these white areas the solid pillars themselves, made of coal?  Or are they open-air places, and the dividers with rectangles in them are solid coal walls, and therefore the pillars?
The divider areas with rectangles in them: are they supposed to be conveyor belts, and therefore the divider areas are open hallways?  Are they conveyor belts, loaded from miners in the open-air white areas?
Portion of panel worked out - worked out, you mean dug out and gone?  Or, a mining engineer 'worked out' that this solid area is strong enough to use as a pillar?  Is the shaded area full of coal or of air?  What is the direction of digging?
longwall face just formed - do the words refer to the neighboring shaded area?  Or to the white block it's in?  Is the shaded area actually a 'face' - the plane between rock and air - rather than a space?  Or is the face intended to be the right edge of the shaded area, immediately to the left of the words?  
The Oklahoma picture is a lot better - there's a key in the image.  The longwall before-conveyors, at least I can see from  the arrows and the door that the thin parts are air and the thick parts are rock.
OsamaBinLogin (talk) 00:37, 26 August 2012 (UTC)
thread_title:  confusing pictures 

message: Yes it's all very small and no subsidence happens and everyone is happy. But what about the Mount Sugarloaf incident, I think it shows a better example of the sorts of things that can happen. http://www.smh.com.au/nsw/mine-subsidence-devastates-sugarloaf-conservation-area-20130828-2spuc.html
Healyhatman (talk) 13:01, 19 April 2015 (UTC)
thread_title:  A better subsidence example 

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thread_title:  External links modified 

message: Hello fellow Wikipedians,
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thread_title:  External links modified (January 2018) 

message: Hi, I have added sections to the longwall mining article, particularly involving the environment.  There was only Subsistence, and I added sections to focus also on water quality, greenhouse gas emissions, and ecological impacts.  Longwall mining is prominent in Canada so I went ahead and added a section on Longwall mining in Canada.Elasticat (talk) 04:05, 10 April 2019 (UTC)
thread_title:  Added new sections