2-5. environmental problems due to mining
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2-5. Environmental problems due to mining. 2-5-1 . Types of Environmental Problems Health hazard due to increased particulates and gases Safety issues (Accidents) during the development and transportation Subsidence caused by the underground vacancies (voids) from the mining - PowerPoint PPT PresentationTRANSCRIPT
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2-5. ENVIRONMENTAL PROBLEMS DUE TO MINING2-5-1. Types of Environmental Problems
• Health hazard due to increased particulates and gases
• Safety issues (Accidents) during the development and transportation
• Subsidence caused by the underground vacan-cies (voids) from the mining
• Degrading (destruction) of the ecosystem through the contamination by (acid) mine drainages
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2-5-2. Health Hazard
• Very similar of those described in 2-3.
2-5-3. Safety
Korean coal miners workedIn German (without Masks)http://iloverossi.egloos.com/476529
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Year All Mining Manufacturing Construction Home utilities Transportation Other Industrial
1985 3.15 11.98 3.15 3.14 0.75 3.76 1.13
1990 1.76 11.55 1.87 1.54 0.49 1.98 0.96
1995 0.99 5.35 1.18 1.01 0.28 1.25 0.46
2000 0.73 4.51 1.21 0.61 0.27 0.87 0.41
2005 0.77 14.1 1.18 0.75 0.24 0.7 0.51
Comparison of the casualty rates (=# casualties/# total worker *100) among different industrial categories
(Korean Statistical Information Service, 2009)
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2-4-3. Subsidence
Subsidence due to the collapsing of the underneath mine adits in Ggotdongnae, Eumseung, Choongbook (May 24, 2008)
http://www.donga.com/fbin/output?n=200805240249
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The Crooked House, Dudley
This pub and restaurant is not like your usual local. As its name suggests, the building leans making it look tipsy. It was built in 1765 but was affected by subsidence due to local mining in the 1800s, leading to one side of the building being four feet lower than the other! The Crooked House attracts intrigued drinkers from all over to see its leaning walls and glasses slide across the tables.
Although the walls are crooked, the floors are straight, creating interesting optical illusions and the owners have annual inspections carried out - just in case it moves! Visit thecrooked-house.co.uk
http://travel.aol.co.uk/2011/05/18/ten-of-the-weirdest-tourist-attractions-in-britain/#!slide=aol_1249878
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Subsidence (sinkholes) in Indiana due to coal mininghttp://igs.indiana.edu/Hazards/Subsidence.cfm
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2-4-4. Acid mine drainage (AMD)
• Acid generation: by oxidation of pyrite (or other sulfides)
• FeS2 + 3.5O2(aq) + H2O = Fe2+ + 2SO42- + 2H+
• Fe2+ + 0.25O2(aq) + H+ = Fe3+ + 0.5H2O• FeS2 + 14Fe3+ + 8H2O = 15Fe2+ + 2SO4
2- + 16H+
• Fe3+ + 2H2O = FeOOH + 2H +
• Can be accelerated by microbes (typically, Acidithiobacillus ferrooxidans)
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Acid mine drainage in a stream just outside of Pittsburgh, PA.http://microbewiki.kenyon.edu/index.php/Acid_mine_drainage
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http://www.baekdudaegan.or.kr/newpage/bbs/board.php?bo_table=tb11&wr_id=117
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• Impacts by AMD• Make it aesthetically bad• Degrade water quality • Destroy the ecosystem