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Extreme multiple-seam mining in the central Appalachian coalfields.

Authors
Mark-C
Source
2006 SME Annual Meeting and Exhibit, March 27-29, St. Louis, Missouri, Preprint 06-060. Littleton, CO: Society for Mining, Metallurgy, and Exploration, Inc., 2006 Mar; :1-7
Link
NIOSHTIC No.
20029907
Abstract
Coal has been mined in the central Appalachian coalfields of southern West Virginia, western Virginia, and eastern Kentucky for more than a century. The dwindling reserve base consists in large part of coal that would have been considered unminable by earlier generations. Nearly every current operation is working on a property where coal has been extracted in the past from seams either above, below, or both. NIOSH is conducting research aimed at helping mine planners prevent hazardous conditions due to multiple-seam interactions. To date, more than 300 case histories have been collected from underground mines mainly in central Appalachia. This paper focuses on several of the more challenging situations that have been encountered, including: (1) room-and-pillar development 20 ft beneath full-extraction workings at a depth of 1,000 ft of cover (Virginia); (2) pillar recovery 45 ft above full-extraction workings at 900 ft of cover (Virginia); (3) near-simultaneous room-and-pillar mining with pillar recovery with 40 ft of interburden and 1,500-2,000 ft of cover (Kentucky); and (4) longwall mining directly beneath main entries in overlying seams (West Virginia). Some of these operations have been highly successful in overcoming the challenges, other less so. The lessons learned from their experience will help ensure that these and similar difficult reserves can be mined safely.
Keywords
Mining-industry; Underground-mining; Safety-research; Ground-control; Coal-mining; Hazards; Room-and-pillar-mining; Longwall-mining; Ground-stability; Injuries
Contact
NIOSH Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
Publication Date
20060327
Document Type
Conference/Symposia Proceedings
Fiscal Year
2006
NTIS Accession No.
NTIS Price
NIOSH Division
PRL
Priority Area
Disease and Injury: Traumatic Injuries
Source Name
2006 SME Annual Meeting and Exhibit, March 27-29, St. Louis, Missouri, Preprint 06-060
State
PA; WV; VA; KY
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