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Showing: 1 to 10 of 443 matches for "underground rolling seams coal"
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| TITLE |
State Statistics – Pennsylvania |
| SUMMARY |
... by mountains and gently rolling hills. ... is characterized by steeply pitching seams
that require ... subsidence associated with abandoned underground anthracite mines ... |
| PUBLISHED |
1992 |
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| TITLE |
Glossary |
| SUMMARY |
... Adit. An underground mine entry at sites where coal seams are exposed ... A surface mining
method that is carried on in level to gently rolling topography on ... |
| PUBLISHED |
1992 |
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| TITLE |
Using a GraphicsOrientedMinicomputerfor Coal Exploration |
| SUMMARY |
... Rolling Hills The Rolling Hills prospect repre- sents a typical ... A concept to improve
underground ... methods of handling the parting between two coal seams in a ... |
| AUTHOR |
Rychkun, E. A. ; Houlding, S. W. |
| PUBLISHED |
1981 |
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| TITLE |
Gas Drainage in Australian Underground Coal Mines |
| SUMMARY |
... incidence of geological discontinuities or rolling of the ... from surface, fracing from
underground, angle drilling ... Predrainage of all coal seams and gas horizons ... |
| AUTHOR |
Ogilvie, Michael L. |
| PUBLISHED |
1995 |
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| TITLE |
The Future of Coal Exports |
| SUMMARY |
... is contained within up to six coal seams ranging up to ... The project is an underground
mine, the depth ofcover ... very similarto Strongman Mine ie rolling to rugged ... |
| PUBLISHED |
2000 |
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| TITLE |
U.S. Longwall Development Projected to Increase |
| SUMMARY |
... 2 Underground coal production by seam thickness. ... consistently favorable floor conditions
— flat to gently rolling horizon, with ... mine the thinnest coal seams. ... |
| AUTHOR |
Weisdack, George V. ; Kvitkovich, James F. |
| PUBLISHED |
2006 |
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Showing: 1 to 10 of 443 matches for "underground rolling seams coal"
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