Topic: Longwall Mining
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How is room and pillar mining for coal different from longwall mi...
Long wall mining involves running "hallways" across through the coal, leaving walls on either side to support the rock roof. Any openings in the walls are small for men to pass through. Room and pillar mining involves taking out all the coa... Read More »
Source: http://answers.yahoo.com/question/index?qid=20080214175246AAhFKRP
What people against longwall mining in Montgomary county in IL sa...
"What people against longwall mining in Montgomery county in IL say about longwall mining contaminating water?" The quick answer to your question is "About the same thing people in other coal mining areas say about it." Longwall mining caus... Read More »
Source: http://answers.yahoo.com/question/index?qid=20061015145158AAZhnBe
What is long-wall mining?
Long-wall mining is a method of underground mining believed to have been developed in Shropshire, England, near the end of the 17th cent ... Read More »
Source: http://answers.encyclopedia.com/question/long-wall-mining-83900.h...
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Longwall Mining
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Longwall mining is an underground coal mining technique which involves removing a portion of an underground coal seam. Longwall mining can cause the land above the mined-out coal seam to destabilise and collapse - this is known as subsidenc...
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Source: http://www.environment.nsw.gov.au/threatenedspecies/LongwallMinin...
Longwall mining involves the complete extraction of coal in panels 200 to 1,200 feet (60 to 360 meters) wide. Typically over the panel the ground subsides by about half the thickness of coal extracted. Thus if a 13 foot (4 meter) coal seam ...
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Source: http://au.answers.yahoo.com/question/index?qid=20100526202733AAg4...
The NSW Scientific Committee in its final determination concluded that alteration of habitat following subsidence due to longwall mining:
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Source: http://www.environment.nsw.gov.au/threatenedspecies/LongwallMinin...
