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podbierane i nadbierane

English translation: undermined and overmined

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02:08 Aug 22, 2010
Polish to English translations [PRO]
Tech/Engineering - Mining & Minerals / Gems
Polish term or phrase: podbierane i nadbierane
w zdaniu - Energia sprężysta w podbieranych i nadbieranych utworach skalnych.
Katarzyna M.
United States
Local time: 10:41
English translation:undermined and overmined
Explanation:
1. Undermining – This situation represents classic top-down multiple seam mining. The upper seam is mined first and abandoned, prior to mining the lower seam. Gob-solid boundaries, barrier pillars, pillar remnants or other structures left over from full extraction mining in the upper seam may cause adverse stress concentrations in the lower seam.

2. Overmining – This situation represents classic bottom-up multiple seam mining. Full extraction mining in the lower seam causes the upper seam to fully subside prior to its development. In addition to stress concentrations due to pillar remnants or gob-solid boundaries in the lower seam, the upper seam and surrounding rock may suffer damage from subsidence-induced displacement and fracture

http://www.cdc.gov/niosh/mining/pubs/pdfs/fmoms.pdf - page 2

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http://www.cdc.gov/niosh/mining/pubs/pdfs/uscho.pdf



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Note added at 7 hrs (2010-08-22 09:47:13 GMT)
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Stability analysis for a portal and mains in a virgin reserve undermined and overmined within 100 feet to 200 feet respectively, Harlan County, Kentucky. - http://www.ame-geolab.com/Representative Projects.htm
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geopiet
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Summary of answers provided
2undermined and overmined
geopiet
Summary of reference entries provided
Podział złóż węgla na poziomy. -
geopiet

  

Answers


7 hrs   confidence: Answerer confidence 2/5Answerer confidence 2/5
undermined and overmined


Explanation:
1. Undermining – This situation represents classic top-down multiple seam mining. The upper seam is mined first and abandoned, prior to mining the lower seam. Gob-solid boundaries, barrier pillars, pillar remnants or other structures left over from full extraction mining in the upper seam may cause adverse stress concentrations in the lower seam.

2. Overmining – This situation represents classic bottom-up multiple seam mining. Full extraction mining in the lower seam causes the upper seam to fully subside prior to its development. In addition to stress concentrations due to pillar remnants or gob-solid boundaries in the lower seam, the upper seam and surrounding rock may suffer damage from subsidence-induced displacement and fracture

http://www.cdc.gov/niosh/mining/pubs/pdfs/fmoms.pdf - page 2

------------------


http://www.cdc.gov/niosh/mining/pubs/pdfs/uscho.pdf



--------------------------------------------------
Note added at 7 hrs (2010-08-22 09:47:13 GMT)
--------------------------------------------------

Stability analysis for a portal and mains in a virgin reserve undermined and overmined within 100 feet to 200 feet respectively, Harlan County, Kentucky. - http://www.ame-geolab.com/Representative Projects.htm

geopiet
Native speaker of: Native in PolishPolish
PRO pts in category: 44
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Reference comments


6 hrs
Reference: Podział złóż węgla na poziomy. -

Reference information:
podbieranie głównych wyrobisk wyższego poziomu poprzez prowadzenie eksploatacji na poziomie niższym

geopiet
Native speaker of: Native in PolishPolish
PRO pts in category: 44
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