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Multiple-seam mining interactions: case histories from the Harris No. 1 mine.

Authors
Chase-FE; Worley-P; Mark-C
Source
Proceedings of the 24th International Conference on Ground Control in Mining, August 2-4, 2005, Morgantown, West Virginia. Peng SS, Mark C, Tadolini SC, Finfinger GL, Khair AW, Heasley KA, eds., Morgantown, WV: West Virginia University, 2005 Aug; :79-86
Link
NIOSHTIC No.
20028270
Abstract
The Harris No. 1 Mine in Boone County, WV, has been longwalling the Eagle Coalbed for over 30 years. Harris has experienced numerous interactions associated with the extensive room-and-pillar and longwall mining operations that have been conducted in the overlying No. 2 Gas Coalbed. The problems have included roof falls, excessive rib sloughage, and gate road and bleeder entry closure. A detailed evaluation of the multiple-seam experiences at Harris No. 1 Mine was done as part of NIOSH's nationwide multiple-seam mining case history database. One observation was that smaller, critically loaded, upper-seam pillars seemed to cause more severe ground conditions than wider pillars. The LaMODEL program was used to investigate this. Results confirmed that critical-sized pillars transmit the highest amounts of stress to adjacent seams. In addition, the data suggest that the probability of a major multiple-seam mining interaction increases when the depth of cover is 1,000 ft or greater and when the Eagle Seam pillars have an ALPS stability factor of less than 1.50.
Keywords
Ground-control; Injuries; Coal-mining; Safety-research; Hazards; Mining-industry; Longwall-mining; Multiple-seam-mining; Models; Geology
Contact
NIOSH Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
Publication Date
20050802
Document Type
Conference/Symposia Proceedings
Editors
Peng-SS; Mark-C; Tadolini-SC; Finfinger-GL; Khair-AW; Heasley-KA
Fiscal Year
2005
NTIS Accession No.
NTIS Price
ISBN No.
0939084569
NIOSH Division
PRL
Priority Area
Research Tools and Approaches: Control Technology and Personal Protective Equipment
Source Name
Proceedings of the 24th International Conference on Ground Control in Mining, August 2-4, 2005, Morgantown, West Virginia
State
PA; WV
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