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Performance of a novel bump control pillar extracting technique during room-and-pillar retreat coal mining
| Author: | Campoli, A. A. |
|---|---|
| Additional Authors: | Oyler, David C., Chase, Frank E. |
| Year: | 1989 |
| Document Type: | BMRA |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.23:9240 |
| Series: | Report of investigations / United States. Bureau of Mines ; |
| Report Number: | 9240 |
| Subjects: | Pillaring (Mining) |
| Coal mines and mining--West Virginia--McDowell County | |
| Link: | https://hdl.handle.net/2027/mdp.39015078477018 |
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