Coal Resource Recoverability
A MethodologyU.S. Bureau of Mines Circular 9368
Table 6.-Deep mine production rates by mining method
| Mining method | Production (tons/shift) per seam thickness | |||
| 24-42in | 42-72in | 72-96in | >96 in | |
| Continuous miner. | 394 | 516 | 654 | 839 |
| Longwall mining | NA | 1,609 | 2,451 | 3,575 |
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