Requirements for roll-over protective structures and falling object protective structures for surface coal mines and surface areas of underground coal mines
By: by Edward E. Hollop
Contributors: United States. Mining Enforcement and Safety Administration
Series: MESA informational report IR ; 1036
Publisher: Dept. of the Interior, Mining Enforcement and Safety Administration
Published: 1977
Place of publication: [Washington]
Language: eng
Number of pages: 56
Subjects: Coal-mining machinery -- Safety measures; Protective coverings