| |
|
|
|
|
|
|
|
|
1. |
Record Nr. |
UNINA9910704546803321 |
|
|
Titolo |
Pillar recovery design, technologies, and procedures in roof control plan reviews |
|
|
|
|
|
|
|
Pubbl/distr/stampa |
|
|
Arlington, Virginia : , : U.S. Department of Labor, Mine Safety and Health Administration, , 2012 |
|
|
|
|
|
|
|
|
|
Descrizione fisica |
|
1 online resource (5 pages) |
|
|
|
|
|
|
Collana |
|
Procedure instruction letter ; ; no. I12-V-02 |
|
|
|
|
|
|
Soggetti |
|
Mine safety - United States |
Barrier pillars - Safety measures |
|
|
|
|
|
|
|
|
Lingua di pubblicazione |
|
|
|
|
|
|
Formato |
Materiale a stampa |
|
|
|
|
|
Livello bibliografico |
Monografia |
|
|
|
|
|
Note generali |
|
"Effective date: 02/16/2012; expiration date: 03/21/2014." |
|
|
|
|
|
| |