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Coal Resource Recoverability
A Methodology

U.S. Bureau of Mines Circular 9368

Table 12.-Recoverable resources - one seam summary

MATEWAN QUADRANGLE
LOWER WHITESBURG B *** Recoverable Resource Calculation***
Coal Parting Dilution Total in % % Mine R.O.M tons % Wash Tons finished
tons tons tons place tons of total recovery recovered recovery product
Total in place resources 57,459,000 5,887,298 2,945,034 66,291,332 100.00
Act/abn undgrd. mines 0 0 0 0 0.00
Act/abn surface mines 0 0 0 0 0.00
Mined out resources 0 0 0 0 0.00
Environ. restrictions 853,393 115,866 21,777 991,036 1.49
Technical restrictions 2,011,792 176,199 128,079 2,316,070 3.49
Barrier restrictions 3,907,212 342,207 248,749 4,498,168 6.19
Total restrictions 6,772,397 634,272 398,605 7,805,274 11.77
Surface minable resources:
Auger 4,208,216 571,354 130,221 4,909,791 7.41 30 1,472,937 81 1,193,872
Contour strip 16,620,460 2,256,580 424,124 19,301,164 29.12 92 17,713,278 80 14,121,640
Mountain top removal 0 0 0 0 0.00 0 0 0 0
Underground minable resources:
Continuous miner 25,417,854 2,226,179 1,618,204 29,262,237 44.14 62 18,172,422 80 14,613,332
Longwall 4,440,073 198,913 373,880 5,012,866 7.56 78 3,910,035 82 3,204,067
Total minable resources 50,686,603 5,253,026 2,546,429 58,486,058 88.23 71 41,268,673 80 33,132,712
Auger resources Percent Continuous miner resources Percent
Minable resources 4,909,791 100.00 Minable resources 29,262,237 100.00
Mine loss rate 0.70 Mine loss rate 0.38
Tons lost in mining 3,436,854 70.00 Tons lost in mining 11,089,815 37.90
Wash plant loss rate 0.19 Wash plant loss rate 0.20
Tons lost during washing 279,266 5.69 Tons lost during washing 3,559,090 12.18
Total tons recovered 14,613,332 49.94
Total tons recovered 1,193,672 24.31 Longwall resources Percent
Minable resources 5,012,866 100.00
Contour strip resources Percent Mine loss rate 0.22
Minable resources 19,301,164 100.00 Tons lost in mining 1,102,830 22.00
Mine loss rate 0.08 Wash plant loss rate 0.18
Tons lost in mining 1,587,886 0.23 Tons lost during mining 705,968 14.08
Wash plant loss rate 0.20
Tons lost during washing 3,591,638 18.61 Total tons recovered 3,204,067 63.92
Total tons recovered 14,121,640 73.16 Restricted resources Percent
Restricted tons 7,805,274 100.00
Mountain top resources Per unit Barrier restrictions 4,498,168 57.63
Minable resources 0 0.00 Recoverable resources Percent
Mine loss rate 0.08 Total resources 66,291,332 100.00
Tons lost in mining 0 0.00 Resources prev. mined 0 0.00
Wash plant loss rate 0.00 Restricted resources 7,805,274 11.77
Tons lost during washing 0 0.00 Mining-loss resources 17,217,385 25.97
Wash-loss resources 8,135,961 12.27
Total tons recovered 0 0.00 Recoverable resources 33,132,712 49.98
Recoverable tons cost summary
Auger Cont. strip Mtn. top Cont. miner Longwall Total Percent
Tons of coal in <$25 range: 1,188,672 3,903,316 0 701,449 818,606 6,612,043 19.96
Tons of coal in $25-$30 range: 5,000 10,193,292 0 12,432,658 2,385,461 25,016,411 75.50
Tons of coal in $30-$40 range: 0 25,032 0 1,479,226 0 1,504,258 4.54
Tons of coal in $40-$50 range: 0 0 0 0 0 0 0.00
Tons of coal in >$50 range: 0 0 0 0 0 0 0.00
Totals 1,193,672 14,121,640 0 14,613,332 3,204,067 33,132,712 100.00
Check 1,193,672 14,121,640 0 14,613,332 3,204,067 33,132,712
Assumptions and relevant information:
Coal acres in area 2,120.62 Coal Density (t/sq-ft) 1,800
Ave. auger penetration 60 Sq. ft./acre 43,500
Highwall effective ratio 20 Barrier resource 9,407,715
(tons in int./ext. barriers)
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