Yours

Educational200315 min631×480

Roof and Rib Control

Mine Safety and Health Administration

Education

At the Internet Archive

Clips are not offered for this film: a public-domain mark that nothing bears out (no year, or a year no US term has left).

Not offered: its uploader or archive marks it public domain, and nothing the site holds bears that out (its record gives no year, or a year from 1978 on, which no US term has left), so where it is free is not known. Unclear is not offered. Open it at the Internet Archive.

About

Mine Safety and Health Administration

Roof and Rib Control DVD548-S - 2003 ( English | Spanish ) Presents a broad overview of roof/rib hazards in the underground coal mining industry, and illustrates the need for roof and rib control. Topics covered in this video include roof and rib evaluations, the roof control plan, sources of roof/rib hazards, proper installation of roof supports, retreat mining, longwall mining, MRS units, ATRS units, information and technical support.

Human-made No record of this work says a model made it. What this means.

Archive
Internet Archive, in FedFlix: US government films
Licence or status
Public domain (Creative Commons dedication), as the Internet Archive states it.
Credit
Mine Safety and Health Administration
Language
English
Who can watch
The archive gives no rating. Invisible Network shows it to Tweens profiles and older, judged from its collection and subjects. How films are placed