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Coal Recovery from Bituminous Coal Surface Mines in the Eastern United States: A Survey.

PB269914

Publication Date	1977
Personal Author	Secor, E. S.; Larwood, G. M.; Gupta, A. B.; Lees, A. S.
Page Count	24
Abstract	The Federal Bureau of Mines conducted a field survey of 153 bituminous coal strip and auger mines to estimate coal recovery from surface mines in the Eastern United States. Recovery was calculated from field data by measuring coal losses resulting from mining coal and leaving barriers. Mean total coal recovery varied only slightly for the two regions studied; 82.7 percent for Appalachia and 84.3 for the Midwest. Total recovery grouped by mining method--contour, area, and mountaintop removal--was 79.8, 84.7, and 85.3 percent, respectively. Mean auger recovery was 35.9 percent; of the total average loss of 64.1 percent, over one-half resulted from design limitations while the remainder was attributed to operating losses. The wide recovery range at individual mines indicate the variability of the eastern surface coal mining industry. Because of this, care should be exercised in applying the results of this report to reserve estimates other than those of a general nature.
Keywords	Bituminous coal Coal mining Surface mining Mine surveys Augers Strip mining Data processing Tables(Data) Performance evaluation Reserves Eastern Region(United States)
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 97K - Fuels
Corporate Authors	Bureau of Mines, Pittsburgh, PA. Eastern Field Operation Center.
Document Type	Technical Report
Title Note	Information circular.
NTIS Issue Number	197721

Coal Recovery from Bituminous Coal Surface Mines in the Eastern United States: A Survey.

Coal Recovery from Bituminous Coal Surface Mines in the Eastern United States: A Survey.
PB269914

Publication Date	1977
Personal Author	Secor, E. S.; Larwood, G. M.; Gupta, A. B.; Lees, A. S.
Page Count	24
Abstract	The Federal Bureau of Mines conducted a field survey of 153 bituminous coal strip and auger mines to estimate coal recovery from surface mines in the Eastern United States. Recovery was calculated from field data by measuring coal losses resulting from mining coal and leaving barriers. Mean total coal recovery varied only slightly for the two regions studied; 82.7 percent for Appalachia and 84.3 for the Midwest. Total recovery grouped by mining method--contour, area, and mountaintop removal--was 79.8, 84.7, and 85.3 percent, respectively. Mean auger recovery was 35.9 percent; of the total average loss of 64.1 percent, over one-half resulted from design limitations while the remainder was attributed to operating losses. The wide recovery range at individual mines indicate the variability of the eastern surface coal mining industry. Because of this, care should be exercised in applying the results of this report to reserve estimates other than those of a general nature.
Keywords	Bituminous coal Coal mining Surface mining Mine surveys Augers Strip mining Data processing Tables(Data) Performance evaluation Reserves Eastern Region(United States)
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 97K - Fuels
Corporate Authors	Bureau of Mines, Pittsburgh, PA. Eastern Field Operation Center.
Document Type	Technical Report
Title Note	Information circular.
NTIS Issue Number	197721